SRUN / Silver Run Acquisition Corp II - SEC-arkivering, Årsberetning, Fuldmagtserklæring

Silver Run Acquisition Corp II
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SEC Filings
All companies that sell securities in the United States must register with the Securities and Exchange Commission (SEC) and file reports on a regular basis. These reports include company annual reports (10K, 10Q), news updates (8K), investor presentations (found in 8Ks), insider trades (form 4), ownership reports (13D, and 13G), and reports related to the specific securities sold, such as registration statements and prospectus. This page shows recent SEC filings related to Silver Run Acquisition Corp II
SEC Filings (Chronological Order)
Denne side giver en komplet, kronologisk liste over SEC-arkiveringer, eksklusive ejerskabsregistreringer, som vi leverer andre steder.
April 15, 2020 10-K/A

Annual Report - 10-K/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 10-K/A Amendment No.

March 5, 2020 EX-4.9

Amended and Restated Purchase and Sale Agreement by and among Kingfisher Midstream, LLC, Oklahoma Produced Water Solutions, LLC, Kingfisher STACK Oil Pipeline, LLC and Cimarron Express Pipeline, LLC and BCE-Mach III LLC, dated January 17, 2020.

Exhibit 4.9 Execution Version AMENDED AND RESTATED PURCHASE AND SALE AGREEMENT by and among Kingfisher Midstream, LLC, Oklahoma Produced Water Solutions, LLC, Kingfisher STACK Oil Pipeline, LLC and Cimarron Express Pipeline, LLC as Seller and BCE-Mach III LLC as Buyer dated January 17, 2020 TABLE OF CONTENTS Page ARTICLE I DEFINITIONS AND INTERPRETATION1 1.1 Defined Terms 1 1.2 References and Rule

March 5, 2020 EX-10.24

Summary of Alta Mesa Resources, Inc. Director Compensation Program

Exhibit 10.24 ALTA MESA RESOURCES, INC. SUMMARY OF DIRECTOR COMPENSATION PROGRAM Eligible Directors (as defined below), as members of the board of directors (the “Board”) of Alta Mesa Resources, Inc. (the “Company”), shall receive cash compensation as set forth in this Director Compensation Program (this “Program”). Such compensation shall be paid automatically and without further action of the Bo

March 5, 2020 EX-99.1

Audit Letter by Ryder Scott Company, L. P. Oklahoma Properties (SEC parameters), dated February 4, 2020

XXX Company Date Page 1 Exhibit 99.1 ALTA MESA HOLDINGS, L.P. Estimated Future Reserves Attributable to Certain Leasehold and Royalty Interests OKLAHOMA PROPERTIES SEC Parameters As of December 31, 2019 /s/ Miles R. Palke /s/ Amara N. Okafor Miles R. Palke Amara N. Okafor, P.E. TBPE License No. 94894 TBPE License No. 113166 Managing Senior Vice President Vice President [SEAL] [SEAL] RYDER SCOTT CO

March 5, 2020 EX-21.1

Subsidiaries of the Registrant.

EXHIBIT 21.1 ALTA MESA RESOURCES, INC. Subsidiaries as of the date of this filing  Subsidiary Jurisdiction of Formation 1. Alta Mesa Finance Services Corp. Delaware 2. OEM GP, LLC Texas 3. Alta Mesa Services, LP Texas 4. Oklahoma Energy Acquisitions, LP Texas 5. Kingfisher Stack Oil PL LLC Delaware 6. OK Prod. Water Solutions, LLC Delaware

March 5, 2020 EX-4.10

Amended and Restated Purchase and Sale Agreement by and among Alta Mesa Holdings, LP, Alta Mesa Holdings GP, LLC, OEM GP, LLC, Alta Mesa Finance Services Corp., Alta Mesa Services, LP and Oklahoma Energy Acquisitions, LP and BCE-Mach III LLC and, with respect to certain provisions, Alta Mesa Resources, Inc., dated as of January 17, 2020.

Exhibit 4.10 Execution Version AMENDED & RESTATED PURCHASE AND SALE AGREEMENT by and among Alta Mesa Holdings, LP, Alta Mesa Holdings GP, LLC, OEM GP, LLC, Alta Mesa Finance Services Corp., Alta Mesa Services, LP and Oklahoma Energy Acquisitions, LP as Seller and BCE-Mach III LLC as Buyer and Alta Mesa Resources, Inc., for the limited purposes set for the in Sections 9.8(b), (c), (f), (g), (i), (j

March 5, 2020 10-K

Annual Report - 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended: December 31, 2019 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-38040 ALTA MESA RESOURCES, INC.

February 19, 2020 15-12B

SRUN / Silver Run Acquisition Corp II 15-12B - - 15-12B

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 15 CERTIFICATION AND NOTICE OF TERMINATION OF REGISTRATION UNDER SECTION 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR SUSPENSION OF DUTY TO FILE REPORTS UNDER SECTIONS 13 AND 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934. Commission File Number 001-38040 Alta Mesa Resources, Inc. (Exact name of registrant as specified i

February 13, 2020 15-12B

SRUN / Silver Run Acquisition Corp II 15-12B - - 15-12B

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 15 CERTIFICATION AND NOTICE OF TERMINATION OF REGISTRATION UNDER SECTION 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR SUSPENSION OF DUTY TO FILE REPORTS UNDER SECTIONS 13 AND 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934. Commission File Number 001-38040 Alta Mesa Resources, Inc. (Exact name of registrant as specified i

February 11, 2020 POS AM

SRUN / Silver Run Acquisition Corp II POS AM - - POS AM

As filed with the Securities and Exchange Commission on February 11, 2020 Registration No.

February 11, 2020 S-8 POS

SRUN / Silver Run Acquisition Corp II S-8 POS - - S-8 POS

As filed with the Securities and Exchange Commission on February 11, 2020 Registration No.

January 16, 2020 8-K

Triggering Events That Accelerate or Increase a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 12, 2020 Alta Mesa Resources, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-38040 81-4433840 (State or Other Jurisdiction of Incorporation) (Commission

January 6, 2020 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 31, 2019 Alta Mesa Resources, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-38040 81-4433840 (State or Other Jurisdiction of Incorporation) (Commission

January 6, 2020 EX-10.1

Purchase and Sale Agreement, dated December 31, 2019, by and among Kingfisher Midstream, LLC, Oklahoma Produced Water Solutions, LLC, Kingfisher STACK Oil Pipeline, LLC and Cimarron Express Pipeline, LLC, collectively as Seller, and BCE-Mach III LLC, as Buyer.

Exhibit 10.1 PURCHASE AND SALE AGREEMENT by and among Kingfisher Midstream, LLC, Oklahoma Produced Water Solutions, LLC, Kingfisher STACK Oil Pipeline, LLC and Cimarron Express Pipeline, LLC as Seller and BCE-Mach III LLC as Buyer dated December 31, 2019 WEIL:\97290797\40\56399.0003 TABLE OF CONTENTS Page ARTICLE I DEFINITIONS AND INTERPRETATION1 1.1Defined Terms 1 1.2References and Rules of Const

January 6, 2020 EX-10.2

Purchase and Sale Agreement, dated December 31, 2019, by and among Alta Mesa Holdings, LP, Alta Mesa Holdings GP, LLC, OEM GP, LLC, Alta Mesa Finance Services Corp., Alta Mesa Services, LP, Oklahoma Energy Acquisitions, LP, collectively as Seller, BCE-Mach III LLC, as Buyer, and, for the limited purposes set forth therein, Alta Mesa Resources, Inc.

Exhibit 10.2 PURCHASE AND SALE AGREEMENT by and among Alta Mesa Holdings, LP, Alta Mesa Holdings GP, LLC, OEM GP, LLC, Alta Mesa Finance Services Corp., Alta Mesa Services, LP and Oklahoma Energy Acquisitions, LP as Seller and BCE-Mach III LLC as Buyer and Alta Mesa Resources, Inc., for the limited purposes set for the in Sections 9.8(b), (c), (f), (g), (i), (j) and (k) hereof dated December 31, 2

November 12, 2019 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2019 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-38040 ALTA MESA RESOURCES, INC.

October 31, 2019 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 23, 2019 Alta Mesa Resources, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-38040 81-4433840 (State or Other Jurisdiction of Incorporation) (Commission

October 10, 2019 SC 13G/A

AMR / Alta Mesa Resources / ORBIS INVESTMENT MANAGEMENT LTD - ORBIS INVESTMENT MANAGEMENT LIMITED Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 4)* Alta Mesa Resources, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 02133L109 (CUSIP Number) September 30, 2019 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which t

October 1, 2019 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2019 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-38040 ALTA MESA RESOURCES, INC.

September 20, 2019 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 10-Q x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2019 OR ¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-38040 ALTA MESA RESOURCES, INC.

September 17, 2019 EX-99.1

UNITED STATES BANKRUPTCY COURT SOUTHERN DISTRICT OF TEXAS HOUSTON DIVISION

Exhibit 99.1 UNITED STATES BANKRUPTCY COURT SOUTHERN DISTRICT OF TEXAS HOUSTON DIVISION ENTERED 09/12/2019 In re: ALTA MESA RESOURCES, INC., et al., Debtors.1 § Chapter 11 § § Case No. 19-35133 (MI) § § Jointly Administered) § (Emergency Hearing Requested) § INTERIM ORDER APPROVING NOTIFICATION AND HEARING PROCEDURES FOR CERTAIN TRANSFERS AND DECLARATIONS OF WORTHLESSNESS WITH RESPECT TO STOCK [Re

September 17, 2019 EX-99.2

ALTA MESA RESOURCES RECEIVES NASDAQ NOTICE OF DELISTING

Exhibit 99.2 ALTA MESA RESOURCES RECEIVES NASDAQ NOTICE OF DELISTING HOUSTON, September 17, 2019 (GLOBE NEWSWIRE) - Alta Mesa Resources, Inc. (NASDAQ: AMR, “Alta Mesa Resources” or the “Company”) today announced that, on September 13, 2019, it received notice from the Nasdaq Stock Market (“Nasdaq”) that, because the Company filed for protection under Chapter 11 of the U.S. Bankruptcy Code on Septe

September 17, 2019 8-K

Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing, Financial Statements and Exhibits, Bankruptcy or Receivership

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 17, 2019 (September 12, 2019) Alta Mesa Resources, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-38040 81-4433840 (State or Other Jurisdiction of Inco

September 12, 2019 EX-99.1

Cleansing Materials September 2019 Forward Looking Statements FORWARD-LOOKING STATEMENTS Non-GAAP and Other Financial Information This presentation includes "forward-looking statements" within the meaning of Section 27A This presentation includes (i)

a201909cleansingmaterial Cleansing Materials September 2019 Forward Looking Statements FORWARD-LOOKING STATEMENTS Non-GAAP and Other Financial Information This presentation includes "forward-looking statements" within the meaning of Section 27A This presentation includes (i) 2019-2021 estimated pre-hedge and pre-general and of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange administrative expense EBITDA of Alta Mesa Holdings, which represents a current Act of 1934, as amended.

September 12, 2019 EX-10.2

Form of Bonus Agreement, dated September 7, 2019, by and between Alta Mesa Resources, Inc. and Executive.

Exhibit 10.2 ALTA MESA RESOURCES, INC. 15021 Katy Freeway, Suite 400 Houston, Texas 77094 (281) 530-0991 [DATE] [Employee Name] [Employee Address] RE: Amendment to 2019 Incentives and Additional Retention Dear : We appreciate your continued service and would like to offer you an additional incentive in order to encourage you to stay with us through our restructuring. However, in order to be eligib

September 12, 2019 EX-10.1

Amended and Restated Consulting Agreement, dated September 10, 2019, by and Alta Mesa Services, LP, Meridian Energy LLC, Randy Limbacher, John H. Campbell, Jr. and Mark P. Castiglione.

Exhibit 10.1 September 10, 2019 MERIDIAN ENERGY LLC 4212 San Felipe Street Box K Houston, Texas 77027-2902 Gentlemen: This letter agreement (as the same may be amended, restated or otherwise modified, this “Agreement”) amends and restates and continues that letter agreement (the “Prior Agreement”) dated December 20, 2018 by and among Alta Mesa Services, LP, a Delaware limited partnership (the “Com

September 12, 2019 EX-99.2

Alta Mesa Resources and Alta Mesa Holdings File Voluntary Bankruptcy petition; Announce Leadership Changes

Exhibit 99.2 Date: September 12, 2019 Alta Mesa Resources and Alta Mesa Holdings File Voluntary Bankruptcy petition; Announce Leadership Changes HOUSTON, September 12, 2019 (GLOBE NEWSWIRE) - Alta Mesa Resources, Inc. (NASDAQ: AMR “Alta Mesa Resources”), Alta Mesa Holdings, LP (“Alta Mesa”), Alta Mesa Holdings GP, LLC, OEM GP, LLC, Alta Mesa Finance Services Corp., Alta Mesa Services, LP and Oklah

September 12, 2019 8-K

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Triggering Events That Accelerate or Increase a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement, Bankruptcy or Receivership

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 7, 2019 Alta Mesa Resources, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-38040 81-4433840 (State or Other Jurisdiction of Incorporation) (Commission

September 10, 2019 DEF 14A

SRUN / Silver Run Acquisition Corp II DEF 14A - - DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ Defin

August 27, 2019 EX-10.14

Separation Agreement, dated as of November 13, 2018, by and between Alta Mesa Services, LP and Michael A. McCabe.

EXHIBIT 10.14 SEPARATION AGREEMENT This SEPARATION AGREEMENT (“Agreement”) is made and entered into by and between Alta Mesa Services, LP, a Texas limited partnership (the “Company”), and Michael A. McCabe (“Executive”). The Company and Executive may be individually referred to herein as the “Party” and collectively as the “Parties.” This Agreement is effective on the date it is signed by the last

August 27, 2019 EX-4.8

Description of Alta Mesa Resources, Inc’s Securities.

EXHIBIT 4.8 DESCRIPTION OF SECURITIES REGISTERED UNDER SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934 Class A Common Stock Holders of our Class A Common Stock are entitled to one vote for each share held on all matters to be voted on by our stockholders. Holders of the Class A Common Stock and holders of the Class C Common Stock will vote together as a single class on all matters submitted to a

August 27, 2019 EX-10.7

Letter Agreement, dated as of December 20, 2018, by and among Alta Mesa Services, LP, Randy Limbacher, John H. Campbell, Jr. and Mark P. Castiglione, and Meridian Energy LLC.

EXHIBIT 10.7 December 20, 2018 MERIDIAN ENERGY LLC 2129 LOOSCAN LANE HOUSTON, TEXAS 77019 Ladies and Gentlemen: This letter agreement (as the same may be amended, restated or otherwise modified, this “Agreement”) sets forth the mutual understanding and agreement by and among Alta Mesa Services, LP, a Delaware limited partnership (the “Company”), Randy Limbacher (“Limbacher”), John H. Campbell, Jr.

August 27, 2019 EX-99.1

Audit Letter by Ryder Scott Company, L. P. Oklahoma Properties (SEC parameters), dated April 25, 2019

EXHIBIT 99.1 ALTA MESA HOLDINGS, L.P. Estimated Future Reserves Attributable to Certain Leasehold and Royalty Interests OKLAHOMA PROPERTIES SEC Parameters As of December 31, 2018 /s/ Miles R. Palke /s/ Amara N. Okafor Miles Palke, P.E. Amara N. Okafor, P.E. TBPE License No. 94894 TBPE License No. 113166 Managing Senior Vice President Senior Petroleum Engineer RYDER SCOTT COMPANY, L.P. TBPE Firm Re

August 27, 2019 EX-10.13

Separation Agreement, dated as of December 20, 2018, by and between Alta Mesa Services, LP and Harlan H. Chappelle

EXHIBIT 10.13 SEPARATION AGREEMENT This SEPARATION AGREEMENT (“Agreement”) is made and entered into by and between Alta Mesa Services, LP, a Texas limited partnership (the “Company”), and Harlan H. Chappelle (“Executive”). The Company and Executive may be individually referred to herein as the “Party” and collectively as the “Parties.” This Agreement is effective on December 20, 2018. WHEREAS, Exe

August 27, 2019 10-K

SRUN / Silver Run Acquisition Corp II 10-K - Annual Report - 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended: December 31, 2018 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-38040 ALTA MESA RESOURCES, INC.

August 27, 2019 EX-10.16

Separation Agreement, dated as of December 20, 2018, by and between Alta Mesa Services, LP and Homer “Gene” Cole.

EXHIBIT 10.16 SEPARATION AGREEMENT This SEPARATION AGREEMENT (“Agreement”) is made and entered into by and between Alta Mesa Services, LP, a Texas limited partnership (the “Company”), and Homer E. Cole (“Executive”). The Company and Executive may be individually referred to herein as the “Party” and collectively as the “Parties.” This Agreement is effective on December 20, 2018. WHEREAS, Executive

August 27, 2019 EX-21.1

Subsidiaries of the Registrant.

EXHIBIT 21.1 ALTA MESA RESOURCES, INC. Subsidiaries as of the date of this filing  Subsidiary Jurisdiction of Formation 1. Alta Mesa Finance Services Corp. Delaware 2. OEM GP, LLC Texas 3. Alta Mesa Services, LP Texas 4. Oklahoma Energy Acquisitions, LP Texas 5. Kingfisher Stack Oil PL LLC 6. OK Prod. Water Solutions, LLC 7. 8.

August 27, 2019 EX-10.8

Employment Agreement, dated as of January 7, 2019, by and between Alta Mesa Services, LP and John C. Regan.

EXHIBIT 10.8 EMPLOYMENT AGREEMENT THIS EMPLOYMENT AGREEMENT (the “Agreement”), is made and entered into as of January 7, 2019 (the “Effective Date”), by and between Alta Mesa Services, LP, a Texas limited partnership (the “Company”), John C. Regan (hereafter “Executive”) and, solely with respect to Section 41, Alta Mesa Holdings, LP, a Texas limited partnership (“Alta Mesa”). The Company and Execu

August 27, 2019 EX-10.15

Separation Agreement, dated as of December 20, 2018, by and between Alta Mesa Services, LP and Michael E. Ellis.

EXHIBIT 10.15 SEPARATION AGREEMENT This SEPARATION AGREEMENT (“Agreement”) is made and entered into by and between Alta Mesa Services, LP, a Texas limited partnership (the “Company”), and Michael E. Ellis (“Executive”). The Company and Executive may be individually referred to herein as the “Party” and collectively as the “Parties.” This Agreement is effective on December 20, 2018. WHEREAS, Execut

August 27, 2019 EX-10.9

Employment Agreement, dated as of April 9, 2018, by and between Alta Mesa Services LP and Kimberly O. Warnica.

EXHIBIT 10.9 EMPLOYMENT AGREEMENT THIS EMPLOYMENT AGREEMENT (the “Agreement”), is made and entered into as of April 9, 2018 (the “Effective Date”), by and between Alta Mesa Services, LP, a Texas limited partnership (the “Company”), Kimberly Warnica (hereafter “Executive”) and, solely with respect to Section 41, Alta Mesa Holdings, LP, a Texas limited partnership (“Alta Mesa”). The Company and Exec

August 27, 2019 EX-10.4

Amendment No. 3 to Credit Agreement dated as of December 5, 2018 but effective as of February 9, 2018, to the Eighth Amended and Restated Credit Agreement dated as of February 9, 2018, among Alta Mesa Holdings, LP, as borrower, Wells Fargo Bank, National Association, as administrative agent for the Lenders and as issuing lender and the Lenders listed therein.

EXHIBIT 10.4 AMENDMENT NO. 3 TO CREDIT AGREEMENT This Amendment No. 3 to Credit Agreement ("Agreement") entered into on December 5, 2018 but made effective as of February 9, 2018 ("Effective Date"), is among Alta Mesa Holdings, LP, a Texas limited partnership ("Borrower"), the Lenders (as defined below), Wells Fargo Bank, National Association, as administrative agent for the Lenders (as defined be

August 21, 2019 EX-99.1

ALTA MESA RESOURCES RECEIVES NASDAQ NOTICE REGARDING NON-COMPLIANCE WITH CONTINUED LISTING STANDARDS

EXHIBIT 99.1 ALTA MESA RESOURCES RECEIVES NASDAQ NOTICE REGARDING NON-COMPLIANCE WITH CONTINUED LISTING STANDARDS HOUSTON, August 21, 2019 (GLOBE NEWSWIRE) - Alta Mesa Resources, Inc. (NASDAQ: AMR, “Alta Mesa Resources” or the “Company”) today announced that The NASDAQ Stock Market LLC (“NASDAQ”) notified the Company on August 16, 2019 that it is not in compliance with NASDAQ Listing Rule 5250(c)(

August 21, 2019 8-K

Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 16, 2019 Alta Mesa Resources, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-38040 81-4433840 (State or Other Jurisdiction of Incorporation) (Commission F

August 15, 2019 8-K

Triggering Events That Accelerate or Increase a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 13, 2019 Alta Mesa Resources, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-38040 81-4433840 (State or Other Jurisdiction of Incorporation) (Commission F

August 13, 2019 SC 13D/A

AMR / Alta Mesa Resources / Highbridge Principal Strategies, LLC - SC 13D/A Activist Investment

SC 13D/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 2)* ALTA MESA RESOURCES, INC. (Name of Issuer) Class A Common Stock ($0.0001 par value per share) (Title of Class of Securities) 02133L109 (CUSIP Number) Timothy Donnelly 40 West 57th Street, 33rd Floor New York, New York 10019 (212) 287-6767 (Name,

August 9, 2019 NT 10-Q

SRUN / Silver Run Acquisition Corp II NT 10-Q - - NT 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Commission file number: 001-38040 FORM 12b-25 NOTIFICATION OF LATE FILING (Check one): ☐ Form 10-K ☐ Form 20-F ☐ Form 11-K x Form 10-Q ☐ Form 10-D ☐ Form N-SAR ☐ Form N-CSR For Period Ended: June 30, 2019 ☐ Transition Report on Form 10-K ☐ Transition Report on Form 20-F ☐ Transition Report on Form 11-K ☐ Transition Report on F

August 6, 2019 8-K

Other Events, Shareholder Director Nominations

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 6, 2019 Alta Mesa Resources, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-38040 81-4433840 (State or Other Jurisdiction of Incorporation) (Commission Fi

July 8, 2019 EX-10.1

Separation Agreement, by and between Alta Mesa Services, LP and Ronald J. Smith, dated July 2, 2019.

EXHIBIT 10.1 SEPARATION AGREEMENT This SEPARATION AGREEMENT (“Agreement”) is made and entered into by and between Alta Mesa Services, LP, a Texas limited partnership (the “Company”), and Ronald J. Smith (“Executive”). The Company and Executive may be individually referred to herein as the “Party” and collectively as the “Parties.” This Agreement is effective on July 2, 2019. WHEREAS, Executive and

July 8, 2019 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 2, 2019 Alta Mesa Resources, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-38040 81-4433840 (State or Other Jurisdiction of Incorporation) (Commission File

May 17, 2019 EX-99.1

Alta Mesa Resources Provides Operational and Financial Update; Receives NASDAQ notice regarding non-compliance with continued listing standards; Alta Mesa Holdings Files Form 10-K

Exhibit 99.1 Alta Mesa Resources Provides Operational and Financial Update; Receives NASDAQ notice regarding non-compliance with continued listing standards; Alta Mesa Holdings Files Form 10-K Alta Mesa Resources, Inc. (NASDAQ: AMR, “Alta Mesa” or the “Company”) today provided an operational and financial update for its subsidiaries Alta Mesa Holdings, LP (“Alta Mesa Upstream”) and Kingfisher Mids

May 17, 2019 8-K

Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 14, 2019 Alta Mesa Resources, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-38040 81-4433840 (State or Other Jurisdiction of Incorporation) (Commission File

May 13, 2019 NT 10-Q

SRUN / Silver Run Acquisition Corp II NT 10-Q NT 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Commission file number: 001-38040 FORM 12b-25 NOTIFICATION OF LATE FILING (Check one): ☐ Form 10-K ☐ Form 20-F ☐ Form 11-K x Form 10-Q ☐ Form 10-D ☐ Form N-SAR ☐ Form N-CSR For Period Ended: December 31, 2018 ☐ Transition Report on Form 10-K ☐ Transition Report on Form 20-F ☐ Transition Report on Form 11-K ☐ Transition Report

April 30, 2019 EX-10.1

First Amendment and Limited Waiver to Amended and Restated Credit Agreement dated as of April 29, 2019, among Kingfisher Midstream, LLC, each of the lenders that is a signatory thereto, and Wells Fargo Bank, N.A., as administrative agent and an issuer of letters of credit, to that certain Amended and Restated Credit Agreement dated as of May 30, 2018 (incorporated by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K filed with the SEC on May 1, 2019).

Exhibit 10.1 First Amendment and Limited Waiver to Amended and Restated Credit Agreement This First Amendment and Limited Waiver to Amended and Restated Credit Agreement (this “Amendment”), dated as of April 29, 2019 (the “Effective Date”), is among Kingfisher Midstream, LLC, a Delaware limited liability company (the “Borrower”), each of the Lenders that is a signatory hereto, and Wells Fargo Bank

April 30, 2019 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 29, 2019 Alta Mesa Resources, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-38040 81-4433840 (State or Other Jurisdiction of Incorporation) (Commission Fi

April 8, 2019 8-K

Regulation FD Disclosure, Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 2, 2019 Alta Mesa Resources, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-38040 81-4433840 (State or Other Jurisdiction of Incorporation) (Commission Fil

April 8, 2019 EX-99.1

ALTA MESA RESOURCES, INC. PROVIDES BANK BORROWING UPDATE; RETAINS FINANCIAL ADVISOR; RECEIVES NASDAQ NOTICE REGARDING NON-COMPLIANCE WITH CONTINUED LISTING STANDARDS

Exhibit 99.1 ALTA MESA RESOURCES, INC. PROVIDES BANK BORROWING UPDATE; RETAINS FINANCIAL ADVISOR; RECEIVES NASDAQ NOTICE REGARDING NON-COMPLIANCE WITH CONTINUED LISTING STANDARDS Alta Mesa Resources, Inc. (NASDAQ: AMR, “Alta Mesa” or the “Company”) today announced that Alta Mesa Holdings, LP (“AMH”) had drawn substantially all of the remaining capacity under its senior secured revolving credit fac

March 28, 2019 EX-10.2

Form 2019 Incentive Program Letter Agreement

EX-10.2 3 exhibit102-8kx32819.htm EXHIBIT 10.2 EXHIBIT 10.2 FORM 2019 INCENTIVE PROGRAM LETTER AGREEMENT As approved by the Board of Directors, the amount and terms of your 2019 Incentives are as follows: base salary: Your base salary will be $ Bonus: Your bonus target will be % of your base salary. You are eligible to earn this bonus amount as follows: • 25% or $ will be earned on March 31, 2019;

March 28, 2019 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 22, 2019 Alta Mesa Resources, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-38040 81-4433840 (State or Other Jurisdiction of Incorporation) (Commission Fi

March 28, 2019 EX-10.1

Separation Agreement, by and between Alta Mesa Services, LP and Craig W. Collins, dated March 26, 2019.

EXHIBIT 10.1 SEPARATION AGREEMENT This SEPARATION AGREEMENT (“Agreement”) is made and entered into by and between Alta Mesa Services, LP, a Texas limited partnership (the “Company”), and Craig W. Collins (“Executive”). The Company and Executive may be individually referred to herein as the “Party” and collectively as the “Parties.” This Agreement is effective on March 26, 2019. WHEREAS, Executive

March 4, 2019 NT 10-K

SRUN / Silver Run Acquisition Corp II NT 10-K

NT 10-K 1 amr12b-25.htm NT 10-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Commission file number: 001-38040 FORM 12b-25 NOTIFICATION OF LATE FILING (Check one): x Form 10-K ☐ Form 20-F ☐ Form 11-K ☐ Form 10-Q ☐ Form 10-D ☐ Form N-SAR ☐ Form N-CSR For Period Ended: December 31, 2018 ☐ Transition Report on Form 10-K ☐ Transition Report on Form 20-F ☐ Transition Report o

February 26, 2019 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 25, 2019 Alta Mesa Resources, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-38040 81-4433840 (State or Other Jurisdiction of Incorporation) (Commission

February 26, 2019 EX-99.1

ALTA MESA ANNOUNCES INITIAL 2019 OUTLOOK; REPORTS PRELIMINARY FOURTH QUARTER AND FULL YEAR 2018 RESULTS

Exhibit 99.1 ALTA MESA ANNOUNCES INITIAL 2019 OUTLOOK; REPORTS PRELIMINARY FOURTH QUARTER AND FULL YEAR 2018 RESULTS Houston, Texas - February 25, 2019 - Alta Mesa Resources, Inc. (NASDAQ: AMR, “Alta Mesa Resources” or the “Company”) today announced its 2019 outlook, preliminary fourth quarter 2018 production and volume results and certain other full year 2018 unaudited financial and operational r

February 14, 2019 SC 13G/A

AMR / Alta Mesa Resources / ORBIS INVESTMENT MANAGEMENT LTD - ORBIS INVESTMENT MANAGEMENT LIMITED Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 3)* Alta Mesa Resources, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 02133L109 (CUSIP Number) December 31, 2018 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which th

February 14, 2019 EX-99.1

JOINT FILING AGREEMENT

EX-99.1 2 p27992625b.htm JOINT FILING AGREEMENT Exhibit 99.1 JOINT FILING AGREEMENT The undersigned hereby agree that the foregoing statement on Schedule 13G is filed on behalf of each of the undersigned in accordance with the provisions of Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended, and that all subsequent amendments to this statement on Schedule 13G may be filed on behal

February 14, 2019 SC 13G/A

AMR / Alta Mesa Resources / HIGHFIELDS CAPITAL MANAGEMENT LP - FORM SC 13G/A Passive Investment

SC 13G/A 1 schedule13ga.htm FORM SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 2)* ALTA MESA RESOURCES, INC. (Formerly SILVER RUN ACQUISITION CORPORATION II) (Name of Issuer) CLASS A COMMON STOCK, $0.0001 PAR VALUE (Title of Class of Securities) 82812A103 (CUSIP Number) December 31, 2018 (Dat

February 14, 2019 SC 13G/A

AMR / Alta Mesa Resources / Alyeska Investment Group, L.P. Passive Investment

SC 13G/A 1 alsk12311813g-a1SRUN.txt | OMB APPROVAL | || |OMB NUMBER: | UNITED STATES |EXPIRES: | SECURITIES AND EXCHANGE COMMISSION | JUNE 30, 2012 | Washington, D.C. 20549 |ESTIMATED AVERAGE | |BURDEN HOURS | |PER RESPONSE ...11 | SCHEDULE 13G | Under the Securities Exchange Act of 1934 (Amendment No. 1 )* Alta Mesa Resources Inc. (AMR) - (Name of Issuer) CL A - (Title of Class of Securities) 021

February 14, 2019 SC 13G/A

AMR / Alta Mesa Resources / Point72 Asset Management, L.P. - SCHEDULE 13G/A, #1 Passive Investment

240.13d-102 Schedule 13G - Information to be included in statements filed pursuant to 240.13d-1(b), (c), and (d) and amendments thereto filed pursuant to 240.13d-2. Securities and Exchange Commission, Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* (Name of Issuer) Alta Mesa Resources, Inc. (Title of Class of Securities) Class A Common Stock, Par Va

January 10, 2019 SC 13G/A

AMR / Alta Mesa Resources / Wellington Management Group LLP - SEC SCHEDULE 13G Passive Investment

SC 13G/A 1 SEC13GFiling.htm SEC SCHEDULE 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2 )* ALTA MESA RESOURCES, INC. (Name of Issuer) Common Stock (Title of Class of Securities) 02133L109 (CUSIP Number) December 31, 2018 (Date of Event Which Requires Filing of this Statement) Check the appropriate

January 7, 2019 424B3

ALTA MESA RESOURCES, INC. 34,500,000 Shares of Class A Common Stock Issuable upon Exercise of Outstanding Public Warrants 341,740,095 Shares of Class A Common Stock

Filed pursuant to Rule 424(b)(3) Registration Statement No. 333-223033 Prospectus Supplement No. 11 (To Prospectus dated April 27, 2018) ALTA MESA RESOURCES, INC. 34,500,000 Shares of Class A Common Stock Issuable upon Exercise of Outstanding Public Warrants 341,740,095 Shares of Class A Common Stock This prospectus supplement updates, amends and supplements the prospectus dated April 27, 2018, as

January 7, 2019 EX-99.1

ALTA MESA ANNOUNCES APPOINTMENT OF JOHN C. REGAN AS CHEIF FINANCIAL OFFICER

Exhibit 99.1 Alta Mesa Resources, Inc. ALTA MESA ANNOUNCES APPOINTMENT OF JOHN C. REGAN AS CHEIF FINANCIAL OFFICER Houston, Texas - January 7, 2019 - Alta Mesa Resources, Inc. (NASDAQ: AMR, “Alta Mesa Resources” or the “Company”) today announced the appointment of John C. Regan as Vice President and Chief Financial Officer effective January 7, 2019. James Hackett, Chairman of the board of director

January 7, 2019 8-K

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 7, 2019 Alta Mesa Resources, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-38040 81-4433840 (State or Other Jurisdiction of Incorporation) (Commission F

January 4, 2019 424B3

ALTA MESA RESOURCES, INC. 34,500,000 Shares of Class A Common Stock Issuable upon Exercise of Outstanding Public Warrants 341,740,095 Shares of Class A Common Stock

Filed pursuant to Rule 424(b)(7) Registration Statement No. 333-223033 Prospectus Supplement No. 10 (To Prospectus dated April 27, 2018) ALTA MESA RESOURCES, INC. 34,500,000 Shares of Class A Common Stock Issuable upon Exercise of Outstanding Public Warrants 341,740,095 Shares of Class A Common Stock This prospectus supplement updates, amends and supplements the prospectus dated April 27, 2018, as

December 27, 2018 424B3

ALTA MESA RESOURCES, INC. 34,500,000 Shares of Class A Common Stock Issuable upon Exercise of Outstanding Public Warrants 341,740,095 Shares of Class A Common Stock

Filed pursuant to Rule 424(b)(3) Registration Statement No. 333-223033 Prospectus Supplement No. 9 (To Prospectus dated April 27, 2018) ALTA MESA RESOURCES, INC. 34,500,000 Shares of Class A Common Stock Issuable upon Exercise of Outstanding Public Warrants 341,740,095 Shares of Class A Common Stock This prospectus supplement updates, amends and supplements the prospectus dated April 27, 2018, as

December 27, 2018 8-K

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Entry into a Material Definitive Agreement, Financial Statements and Exhibits

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 20, 2018 Alta Mesa Resources, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-38040 81-4433840 (State or Other Jurisdiction of Incorporation) (Commis

December 27, 2018 EX-99.1

ALTA MESA ANNOUNCES LEADERSHIP TRANSITION

EX-99.1 Exhibit 99.1 Alta Mesa Resources, Inc. ALTA MESA ANNOUNCES LEADERSHIP TRANSITION Houston, Texas – December 20, 2018 – Alta Mesa Resources, Inc. (NASDAQ: AMR, “Alta Mesa Resources” or the “Company”) today announced the resignations of Harlan H. Chappelle, President and Chief Executive Officer, and Michael E. Ellis, Vice President and Chief Operating Officer—Upstream, effective December 26,

November 14, 2018 EX-10.1

Master Assignment, Increase Agreement and Amendment No. 1 to Credit Agreement dated as of May 14, 2018 to the Eighth Amended and Restated Credit Agreement dated as of February 9, 2018, among Alta Mesa Holdings, LP, as borrower, Wells Fargo Bank, National Association, as administrative agent for the Lenders and as issuing lender, the Lenders listed therein and Barclays Bank PLC (incorporated by reference to Exhibit 10.1 to the Registrant’s Quarterly Report on Form 10-Q filed with the SEC on November 14, 2018).

EXHIBIT 10.1 Execution Version MASTER ASSIGNMENT, INCREASE AGREEMENT AND AMENDMENT NO. 1 TO CREDIT AGREEMENT This Master Assignment, Increase Agreement and Amendment No. 1 to Credit Agreement ("Agreement") dated as of May 14, 2018 ("Effective Date"), is among Alta Mesa Holdings, LP, a Texas limited partnership ("Borrower"), the Lenders (as defined below), Wells Fargo Bank, National Association, as

November 14, 2018 10-Q

SRUN / Silver Run Acquisition Corp II 10-Q (Quarterly Report)

10-Q 1 amr-093018x10q.htm 10-Q Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 10-Q (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended: September 30, 2018 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period

November 14, 2018 424B3

ALTA MESA RESOURCES, INC. 34,500,000 Shares of Class A Common Stock Issuable upon Exercise of Outstanding Public Warrants 341,740,095 Shares of Class A Common Stock

Filed pursuant to Rule 424(b)(3) Registration Statement No. 333-223033 Prospectus Supplement No. 8 (To Prospectus dated April 27, 2018) ALTA MESA RESOURCES, INC. 34,500,000 Shares of Class A Common Stock Issuable upon Exercise of Outstanding Public Warrants 341,740,095 Shares of Class A Common Stock This prospectus supplement updates, amends and supplements the prospectus dated April 27, 2018, as

November 14, 2018 EX-10.2

Amendment No. 2 to Credit Agreement dated as of August 13, 2018 to the Eighth Amended and Restated Credit Agreement dated as of February 9, 2018, among Alta Mesa Holdings, LP, as borrower, Wells Fargo Bank, National Association, as administrative agent for the Lenders and as issuing lender and the Lenders listed therein (incorporated by reference to Exhibit 10.2 to the Registrant’s Quarterly Report on Form 10-Q filed with the SEC on November 14, 2018).

EXHIBIT 10.2 Executed Version AMENDMENT NO. 2 TO CREDIT AGREEMENT This Amendment No. 2 to Credit Agreement ("Agreement") dated as of August 13, 2018 ("Effective Date"), is among Alta Mesa Holdings, LP, a Texas limited partnership ("Borrower"), the Lenders (as defined below), Wells Fargo Bank, National Association, as administrative agent for the Lenders (as defined below) (in such capacity, the "A

November 13, 2018 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event Reported): November 13, 2018 Alta Mesa Resources, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-38040 81-4433840 (State or Other Jurisdiction of Incorporation) (Commission

November 13, 2018 EX-99.1

FOR MORE INFORMATION CONTACT: Lance L. Weaver (281) 943-5597 [email protected]

EXHIBIT 99.1 Alta Mesa Announces Third Quarter 2018 Financial and Operational Results HOUSTON, Nov. 13, 2018 (GLOBE NEWSWIRE) - Alta Mesa Resources, Inc., (NASDAQ: AMR, “Alta Mesa Resources”, “AMR” or the “Company”) today announced third quarter 2018 unaudited consolidated financial results and certain financial and operational results for its subsidiaries, Alta Mesa Holdings, LP (“Alta Mesa Upstr

October 30, 2018 EX-99.1

Alta Mesa Resources Provides Third Quarter 2018 Preliminary Operations Update

EXHIBIT 99.1 Alta Mesa Resources Provides Third Quarter 2018 Preliminary Operations Update HOUSTON, Oct. 29, 2018 (GLOBE NEWSWIRE) - Alta Mesa Resources, Inc. (NASDAQ: AMR, “Alta Mesa Resources”, or “Company”) today provided preliminary third quarter 2018 production and volume results for its wholly owned subsidiaries, Alta Mesa Holdings, LP (“Alta Mesa Upstream”) and Kingfisher Midstream, LLC (“K

October 30, 2018 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event Reported): October 29, 2018 Alta Mesa Resources, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-38040 81-4433840 (State or Other Jurisdiction of Incorporation) (Commission

September 12, 2018 SC 13G/A

AMR / Alta Mesa Resources / Wellington Management Group LLP - SEC SCHEDULE 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1 )* ALTA MESA RESOURCES, INC. (Name of Issuer) Common Stock (Title of Class of Securities) 02133L109 (CUSIP Number) August 31, 2018 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which thi

September 7, 2018 SC 13G/A

AMR / Alta Mesa Resources / Wellington Management Group LLP - SEC SCHEDULE 13G Passive Investment

SC 13G/A 1 SEC13GFiling.htm SEC SCHEDULE 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1 )* ALTA MESA RESOURCES, INC. (Name of Issuer) Common Stock (Title of Class of Securities) 02133L109 (CUSIP Number) August 31, 2018 (Date of Event Which Requires Filing of this Statement) Check the appropriate bo

August 22, 2018 EX-99.1

JOINT FILING AGREEMENT

EX-99.1 EXHIBIT 1 JOINT FILING AGREEMENT The undersigned hereby agree that the statement on Schedule 13D with respect to the Class A Common Stock of Alta Mesa Resources, Inc. dated as of August 21, 2018 is, and any amendments thereto signed by each of the undersigned shall be, filed on behalf of each of the undersigned pursuant to and in accordance with the provisions of Rule 13d-1(k) under the Se

August 22, 2018 SC 13D/A

AMR / Alta Mesa Resources / Bayou City Energy Management Llc - SC 13D/A Activist Investment

SC 13D/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 2)* ALTA MESA RESOURCES, INC. (Name of Issuer) Class A Common Stock ($0.0001 par value per share) (Title of Class of Securities) 02133L109 (CUSIP Number) William W. McMullen 1201 Louisiana Street, Suite 3308 Houston, Texas 77002 (713) 400-8210 (Name

August 17, 2018 SC 13D/A

AMR / Alta Mesa Resources / Bayou City Energy Management Llc - SC 13D/A Activist Investment

SC 13D/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 1)* ALTA MESA RESOURCES, INC. (Name of Issuer) Class A Common Stock ($0.0001 par value per share) (Title of Class of Securities) 02133L109 (CUSIP Number) William W. McMullen 1201 Louisiana Street, Suite 3308 Houston, Texas 77002 (713) 400-8210 (Name

August 15, 2018 424B3

ALTA MESA RESOURCES, INC. 34,500,000 Shares of Class A Common Stock Issuable upon Exercise of Outstanding Public Warrants 341,740,095 Shares of Class A Common Stock

Table of Contents Filed pursuant to Rule 424(b)(3) Registration Statement No. 333-223033 Prospectus Supplement No. 7 (To Prospectus dated April 27, 2018) ALTA MESA RESOURCES, INC. 34,500,000 Shares of Class A Common Stock Issuable upon Exercise of Outstanding Public Warrants 341,740,095 Shares of Class A Common Stock This prospectus supplement updates, amends and supplements the prospectus dated A

August 15, 2018 NT 10-Q

SRUN / Silver Run Acquisition Corp II NT 10-Q

NT 10-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Commission file number: 001-38040 FORM 12b-25 NOTIFICATION OF LATE FILING (Check one): ☐ Form 10-K ☐ Form 20-F ☐ Form 11-K ☒ Form 10-Q ☐ Form N-SAR ☐ Form N-CSR For Period Ended: June 30, 2018 ☐ Transition Report on Form 10-K ☐ Transition Report on Form 20-F ☐ Transition Report on Form 11-K ☐ Transition Report on Form

August 15, 2018 10-Q

SRUN / Silver Run Acquisition Corp II 10-Q (Quarterly Report)

10-Q 1 amr-063018x10q.htm 10-Q Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 10-Q (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended: June 30, 2018 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from

August 15, 2018 EX-10.3

Form of Alta Mesa Resources, Inc. 2018 Long Term Incentive Plan Restricted Stock Award Agreement (incorporated by reference to Exhibit 10.3 to the Registrant’s Quarterly Report on Form 10-Q filed with the SEC on August 15, 2018).

EXHIBIT 10.3 ALTA MESA RESOURCES, INC. 2018 LONG TERM INCENTIVE PLAN RESTRICTED STOCK GRANT NOTICE Pursuant to the Alta Mesa Resources, Inc. 2018 Long Term Incentive Plan (the “Plan”), Alta Mesa Resources, Inc., a Delaware corporation (the “Company”), has granted to the participant listed below (“Participant”) an award (the “Award”) of Shares of Restricted Stock (the “Restricted Shares”), as descr

August 15, 2018 EX-10.4

Form of Alta Mesa Resources, Inc. 2018 Long Term Incentive Plan Officer Stock Option Award Agreement (incorporated by reference to Exhibit 10.4 to the Registrant’s Quarterly Report on Form 10-Q filed with the SEC on August 15, 2018).

EXHIBIT 10.4 ALTA MESA RESOURCES, INC. 2018 LONG TERM INCENTIVE PLAN STOCK OPTION GRANT NOTICE Pursuant to the Alta Mesa Resources, Inc. 2018 Long Term Incentive Plan (the “Plan”), Alta Mesa Resources, Inc., a Delaware corporation (the “Company”), has granted to the participant listed below (“Participant”) the stock option (the “Option”) described in this Stock Option Grant Notice (the “Grant Noti

August 15, 2018 EX-10.5

Form of Alta Mesa Resources, Inc. 2018 Long Term Incentive Plan Performance-Based Restricted Stock Unit Award Agreement (incorporated by reference to Exhibit 10.5 to the Registrant’s Quarterly Report on Form 10-Q filed with the SEC on August 15, 2018).

EXHIBIT 10.5 ALTA MESA RESOURCES, INC. 2018 LONG TERM INCENTIVE PLAN PERFORMANCE-BASED RESTRICTED STOCK UNIT GRANT NOTICE Pursuant to the Alta Mesa Resources, Inc. 2018 Long Term Incentive Plan (the “Plan”), Alta Mesa Resources, Inc., a Delaware corporation (the “Company”), has granted to the participant listed below (“Participant”) an award (the “Award”) of Performance-Based Restricted Stock Unit

August 14, 2018 EX-99.1

Alta Mesa Announces second quarter 2018 Financial and operational results

EXHIBIT 99.1 Alta Mesa Announces second quarter 2018 Financial and operational results HOUSTON, Aug. 14, 2018 (GLOBE NEWSWIRE) - Alta Mesa Resources, Inc., (NASDAQ: AMR, “Alta Mesa Resources”, the “Company” or “Alta Mesa”) today announced second quarter 2018 unaudited financial and operational results for its wholly owned subsidiaries, Alta Mesa Holdings, LP (“Alta Mesa Upstream” or “AMHLP”) and K

August 14, 2018 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event Reported): August 14, 2018 Alta Mesa Resources, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-38040 81-4433840 (State or Other Jurisdiction of Incorporation) (Commission F

August 14, 2018 424B3

ALTA MESA RESOURCES, INC. 34,500,000 Shares of Class A Common Stock Issuable upon Exercise of Outstanding Public Warrants 341,740,095 Shares of Class A Common Stock

Filed pursuant to Rule 424(b)(3) Registration Statement No. 333-223033 Prospectus Supplement No. 6 (To Prospectus dated April 27, 2018) ALTA MESA RESOURCES, INC. 34,500,000 Shares of Class A Common Stock Issuable upon Exercise of Outstanding Public Warrants 341,740,095 Shares of Class A Common Stock This prospectus supplement updates, amends and supplements the prospectus dated April 27, 2018, as

August 3, 2018 SC 13G/A

AMR / Alta Mesa Resources / ORBIS INVESTMENT MANAGEMENT LTD - ORBIS INVESTMENT MANAGEMENT LIMITED Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2)* Alta Mesa Resources, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 02133L109 (CUSIP Number) July 31, 2018 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this S

July 9, 2018 424B3

ALTA MESA RESOURCES, INC. 34,500,000 Shares of Class A Common Stock Issuable upon Exercise of Outstanding Public Warrants 341,740,095 Shares of Class A Common Stock

Filed pursuant to Rule 424(b)(3) Registration Statement No. 333-223033 Prospectus Supplement No. 5 (To Prospectus dated April 27, 2018) ALTA MESA RESOURCES, INC. 34,500,000 Shares of Class A Common Stock Issuable upon Exercise of Outstanding Public Warrants 341,740,095 Shares of Class A Common Stock This prospectus supplement updates, amends and supplements the prospectus dated April 27, 2018, as

July 9, 2018 EX-16.1

Letter from BDO USA, LLP to the Securities and Exchange Commission, dated July 9, 2018.

EXHIBIT 16.1 July 9, 2018 Securities and Exchange Commission 100 F Street N.E. Washington, D.C. 20549 We have been furnished with a copy of the response to Item 4.01 of Form 8-K for the event that occurred on July 6, 2018, to be filed by our former client, Alta Mesa Resources, Inc. We agree with the statements made in response to that Item insofar as they relate to our Firm. Very truly yours, /s/

July 9, 2018 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Changes in Registrant's Certifying Accountant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 2, 2018 Alta Mesa Resources, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38040 81-4433840 (State or other jurisdiction of incorporation) (Commission

June 19, 2018 424B3

ALTA MESA RESOURCES, INC. 34,500,000 Shares of Class A Common Stock Issuable upon Exercise of Outstanding Public Warrants 341,740,095 Shares of Class A Common Stock

Filed pursuant to Rule 424(b)(3) Registration Statement No. 333-223033 Prospectus Supplement No. 4 (To Prospectus dated April 27, 2018) ALTA MESA RESOURCES, INC. 34,500,000 Shares of Class A Common Stock Issuable upon Exercise of Outstanding Public Warrants 341,740,095 Shares of Class A Common Stock  This prospectus supplement updates, amends and supplements the prospectus dated April 27, 2018, a

June 19, 2018 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 18, 2018 Alta Mesa Resources, Inc. (Exact name of registrant as specified in its charter)  Delaware 001-38040 81-4433840 (State or other jurisdiction of incorporation) (Commissi

June 12, 2018 EX-99.1

JOINT FILING AGREEMENT

EX-99.1 EXHIBIT 1 JOINT FILING AGREEMENT The undersigned hereby agree that the statement on Schedule 13D with respect to the Class A Common Stock of Alta Mesa Resources, Inc. dated as of June 12, 2018 is, and any amendments thereto signed by each of the undersigned shall be, filed on behalf of each of the undersigned pursuant to and in accordance with the provisions of Rule 13d-1(k) under the Secu

June 12, 2018 SC 13D

AMR / Alta Mesa Resources / Bayou City Energy Management Llc - SC 13D Activist Investment

SC 13D UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 ALTA MESA RESOURCES, INC. (Name of Issuer) Class A Common Stock ($0.0001 par value per share) (Title of Class of Securities) 02133L109 (CUSIP Number) William W. McMullen 1201 Louisiana Street, Suite 3308 Houston, Texas 77002 (713) 400-8210 (Name, Address and Telepho

June 12, 2018 SC 13D

AMR / Alta Mesa Resources / High Mesa Holdings, Lp - SC 13D Activist Investment

SC 13D 1 d606126dsc13d.htm SC 13D UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 ALTA MESA RESOURCES, INC. (Name of Issuer) Class A Common Stock ($0.0001 par value per share) (Title of Class of Securities) 02133L109 (CUSIP Number) Jeff Janik President & CEO High Mesa Holdings GP, LLC 15021 Katy Freeway 4th Floor Housto

June 12, 2018 EX-99.1

JOINT FILING AGREEMENT

EX-99.1 EXHIBIT 1 JOINT FILING AGREEMENT The undersigned hereby agree that the statement on Schedule 13D with respect to the Class A Common Stock of Alta Mesa Resources, Inc. dated as of June 12, 2018 is, and any amendments thereto signed by each of the undersigned shall be, filed on behalf of each of the undersigned pursuant to and in accordance with the provisions of Rule 13d-1(k) under the Secu

June 11, 2018 SC 13D/A

SRUNU / Silver Run Acquisition Corporation II / Highbridge Principal Strategies, LLC - SC 13D/A Activist Investment

SC 13D/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 1)* ALTA MESA RESOURCES, INC. (Name of Issuer) Class A Common Stock ($0.0001 par value per share) (Title of Class of Securities) 82812A202 (CUSIP Number) Timothy Donnelly 40 West 57th Street, 33rd Floor New York, New York 10019 (212) 287-6767 (Name,

May 31, 2018 424B3

ALTA MESA RESOURCES, INC. 34,500,000 Shares of Class A Common Stock Issuable upon Exercise of Outstanding Public Warrants 341,740,095 Shares of Class A Common Stock

Filed pursuant to Rule 424(b)(3) Registration Statement No. 333-223033 Prospectus Supplement No. 3 (To Prospectus dated April 27, 2018) ALTA MESA RESOURCES, INC. 34,500,000 Shares of Class A Common Stock Issuable upon Exercise of Outstanding Public Warrants 341,740,095 Shares of Class A Common Stock  This prospectus supplement updates, amends and supplements the prospectus dated April 27, 2018, a

May 31, 2018 EX-10.1

Amended and Restated Credit Agreement, dated May 30, 2018, by and among Kingfisher Midstream, LLC, as borrower, Wells Fargo Bank, N.A., as successor administrative agent and LC issuer, and ABN AMRO Capital USA LLC, as resigning administrative agent, the LC issuers listed therein, the Lenders listed therein and the Exiting lenders listed therein (incorporated by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K filed with the SEC on May 31, 2018).

Exhibit 10.1   AMENDED AND RESTATED CREDIT AGREEMENT KINGFISHER MIDSTREAM, LLC, as Borrower, WELLS FARGO BANK, N.A., as Administrative Agent and LC Issuer, and CERTAIN FINANCIAL INSTITUTIONS, as Lenders $300,000,000 May 30, 2018  WELL FARGO SECURITIES, LLC, CAPITAL ONE, NATIONAL ASSOCIATION and CITIGROUP GLOBAL MARKETS INC. as Joint Bookrunners and Joint Lead Arrangers CITIGROUP GLOBAL MARKETS

May 31, 2018 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 30, 2018 Alta Mesa Resources, Inc. (Exact name of registrant as specified in its charter)  Delaware 001-38040 81-4433840 (State or other jurisdiction of incorporation) (Commissio

May 23, 2018 424B3

ALTA MESA RESOURCES, INC. 34,500,000 Shares of Class A Common Stock Issuable upon Exercise of Outstanding Public Warrants 341,740,095 Shares of Class A Common Stock

424B3 Table of Contents Filed pursuant to Rule 424(b)(3) Registration Statement No.

May 22, 2018 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event Reported): May 21, 2018 Alta Mesa Resources, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-38040 81-4433840 (State or Other Jurisdiction of Incorporation) (Commission File

May 22, 2018 EX-99.1

Alta Mesa Reports First Quarter 2018 Results

EXHIBIT 99.1 Alta Mesa Reports First Quarter 2018 Results HOUSTON, May 21, 2018 (GLOBE NEWSWIRE) - Alta Mesa Resources, Inc., (NASDAQ:AMR) (“Alta Mesa Resources”, the “Company” or “Alta Mesa”) today announced first quarter 2018 unaudited financial and operational results for its wholly owned subsidiaries, Alta Mesa Holdings, LP (“AMHLP”) and Kingfisher Midstream, LLC (“Kingfisher”). Financial High

May 21, 2018 10-Q

SRUN / Silver Run Acquisition Corp II 10-Q (Quarterly Report)

Table of Contents   UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended: March 31, 2018 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-38040 ALTA MESA RESOURCES, INC.

May 16, 2018 NT 10-Q

SRUN / Silver Run Acquisition Corp II NT 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549  FORM 12b-25  NOTIFICATION OF LATE FILING  (Check one): ☐ Form 10-K ☐ Form 20-F ☐Form 11-K ☑ Form 10-Q ☐Form N-SAR ☐ Form N-CSR For Period Ended: March 31, 2018  ☐ Transition Report on Form 10-K ☐ Transition Report on Form 20-F ☐ Transition Report on Form 11-K ☐ Transition Report on Form 10-Q ☐ Transition Report on Form N

May 15, 2018 DEF 14A

SRUN / Silver Run Acquisition Corp II DEF 14A

DEF 14A Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

May 14, 2018 EX-99.2

Alta Mesa Resources, Inc. First Quarter 2018 Operational Update May 14, 2018

EX-99.2 Exhibit 99.2 Alta Mesa Resources, Inc. First Quarter 2018 Operational Update May 14, 2018 2 Disclaimer FORWARD-LOOKING STATEMENTS The information in this presentation and the oral statements made in connection therewith include “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as

May 14, 2018 EX-99.1

ALTA MESA PROVIDES OPERATIONS UPDATE AND REAFFIRMS GUIDANCE

EX-99.1 Exhibit 99.1 Alta Mesa Resources, Inc. ALTA MESA PROVIDES OPERATIONS UPDATE AND REAFFIRMS GUIDANCE Houston, Texas – May 14, 2018 – Alta Mesa Resources, Inc. (NASDAQ: AMR, “Alta Mesa Resources”, the “Company” or “Alta Mesa”) today provided an operations update, including a review of the Company’s first quarter production and operational performance for its wholly owned subsidiaries, Alta Me

May 14, 2018 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

Form 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 14, 2018 Alta Mesa Resources, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38040 81-4433840 (State or other jurisdiction of incorporation) (Co

May 3, 2018 424B3

ALTA MESA RESOURCES, INC. 34,500,000 Shares of Class A Common Stock Issuable upon Exercise of Outstanding Public Warrants 341,740,095 Shares of Class A Common Stock

424B3 1 d582900d424b3.htm 424B3 Filed pursuant to Rule 424(b)(3) Registration Statement No. 333-223033 Prospectus Supplement No. 1 (To Prospectus dated April 28, 2018) ALTA MESA RESOURCES, INC. 34,500,000 Shares of Class A Common Stock Issuable upon Exercise of Outstanding Public Warrants 341,740,095 Shares of Class A Common Stock This prospectus supplement updates, amends and supplements the pros

May 2, 2018 8-K

Financial Statements and Exhibits, Changes in Registrant's Certifying Accountant

 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549  FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 27, 2018  Alta Mesa Resources, Inc. (Exact name of registrant as specified in its charter)  Delaware 001-38040 81-4433840 (State or other jurisdiction of incorporation) (C

May 2, 2018 EX-16.1

May 2, 2018

Exhibit 16.1  May 2, 2018 Office of the Chief Accountant Securities and Exchange Commission 100 F Street, NE Washington, D.C. 20549 Ladies and Gentlemen: We have read the statements of Alta Mesa Resources, Inc. included under Item 4.01 of its Form 8-K dated April 27, 2018, and we agree with the statements contained in paragraphs 3 and 4 and the statement made in the 1st paragraph under Item 4.01,

April 27, 2018 424B3

ALTA MESA RESOURCES, INC. 34,500,000 Shares of Class A Common Stock Issuable upon Exercise of Outstanding Public Warrants 341,740,095 Shares of Class A Common Stock

424B3 Table of Contents Index to Financial Statements Filed Pursuant to Rule 424(b)(3) Registration Statement No.

April 12, 2018 S-8

SRUN / Silver Run Acquisition Corp II S-8

S-8 As filed with the Securities and Exchange Commission on April 12, 2018. Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-8 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 Alta Mesa Resources, Inc. (Exact Name of Registrant as Specified in Its Charter) State of Delaware 81-4433840 (State or Other Jurisdiction of Incorporation or organi

April 11, 2018 CORRESP

SRUN / Silver Run Acquisition Corp II CORRESP

CORRESP Alta Mesa Resources, Inc. 15021 Katy Freeway, Suite 400 Houston, Texas 77094 April 11, 2018 Via EDGAR Securities and Exchange Commission Division of Corporation Finance 100 F. Street, N.E. Washington, D.C. 20549 Attn: Irene Barberena-Meissner Office of Natural Resources Division of Corporation Finance Re: Alta Mesa Resources, Inc. Registration Statement on Form S-1 File No. 333-223033 Dear

April 9, 2018 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 9, 2018 (April 3, 2018) Alta Mesa Resources, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38040 81-4433840 (State or other jurisdiction of incorp

April 9, 2018 EX-10.1

Employment Agreement, dated as of April 3, 2018, by and between Alta Mesa Services, LP and Craig W. Collins (incorporated by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K filed with the SEC on April 9, 2018).

EX-10.1 Exhibit 10.1 Execution Version EMPLOYMENT AGREEMENT THIS EMPLOYMENT AGREEMENT (the “Agreement”), is made and entered into as of April 3, 2018 (the “Effective Date”), by and between Alta Mesa Services, LP, a Texas limited partnership (the “Company”), Craig Collins (hereafter “Executive”) and, solely with respect to Section 41, Alta Mesa Holdings, LP, a Texas limited partnership (“Alta Mesa”

April 6, 2018 S-1/A

SRUN / Silver Run Acquisition Corp II S-1/A

S-1/A Table of Contents As filed with the Securities and Exchange Commission on April 6, 2018 Registration No.

April 2, 2018 8-K/A

Financial Statements and Exhibits

8-K/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K (Amendment No. 1) CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 2, 2018 (February 9, 2018 ) Alta Mesa Resources, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38040 81-4433840 (State or othe

March 29, 2018 10-K

SRUN / Silver Run Acquisition Corp II 10-K (Annual Report)

10-K 1 a18-8783110k.htm 10-K Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2017 o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file

March 29, 2018 EX-21.1

Subsidiaries of the Registrant.*

Exhibit 21.1 SUBSIDIARIES SRII Opco GP, LLC SRII Opco, LP Alta Mesa Holdings GP, LLC Alta Mesa Holdings, LP Kingfisher Midstream, LLC Alta Mesa Financial Services Corp. OEM GP, LLC Alta Mesa Services, LP Oklahoma Energy Acquisitions, LP

March 29, 2018 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event Reported): March 29, 2018 Alta Mesa Resources, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-38040 81-4433840 (State or Other Jurisdiction of Incorporation) (Commission Fi

March 29, 2018 EX-99.1

Alta Mesa Resources, Inc. Announces Operations Update and 2018 Guidance; 2017 Financial Results for Subsidiary Alta Mesa Holdings, LP

EXHIBIT 99.1 Alta Mesa Resources, Inc. Announces Operations Update and 2018 Guidance; 2017 Financial Results for Subsidiary Alta Mesa Holdings, LP HOUSTON, March 29, 2018 (GLOBE NEWSWIRE) - Alta Mesa Resources, Inc., (NASDAQ:AMR) (“Alta Mesa Resources”, the “Company” or “Alta Mesa”) today announced 2018 production and capex guidance estimates for its wholly owned subsidiaries, Alta Mesa Holdings,

March 21, 2018 SC 13D

SRUNU / Silver Run Acquisition Corporation II / Highbridge Principal Strategies, LLC - SC 13D Activist Investment

SC 13D UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. )* ALTA MESA RESOURCES, INC. (Name of Issuer) Class A Common Stock ($0.0001 par value per share) (Title of Class of Securities) 82812A202 (CUSIP Number) Timothy Donnelly 40 West 57th Street, 33rd Floor New York, New York 10019 (212) 287-6767 (Name, Ad

March 21, 2018 EX-99.6

ALTA MESA RESOURCES, INC. EQUITY VOTING AGREEMENT

EX-99.6 Exhibit 6 ALTA MESA RESOURCES, INC. EQUITY VOTING AGREEMENT This Alta Mesa Resources, Inc. Equity Voting Agreement (this “Agreement”) is made and entered into effective as of March 21, 2018 (the “Effective Date”) by and among by and among High Mesa Inc., a Delaware corporation (the “Company”), and each of the parties hereto. Each party hereto, a “Party,” and all parties hereto collectively

March 13, 2018 EX-99.1

JOINT FILING AGREEMENT

Exhibit 99.1 JOINT FILING AGREEMENT The undersigned hereby agree that the foregoing statement on Schedule 13G is filed on behalf of each of the undersigned in accordance with the provisions of Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended, and that all subsequent amendments to this statement on Schedule 13G may be filed on behalf of each of the undersigned without the necessi

March 13, 2018 SC 13G

AMR / Alta Mesa Resources / Point72 Asset Management, L.P. - SCHEDULE 13G Passive Investment

240.13d-102 Schedule 13G - Information to be included in statements filed pursuant to 240.13d-1(b), (c), and (d) and amendments thereto filed pursuant to 240.13d-2. Securities and Exchange Commission, Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.)* (Name of Issuer) Alta Mesa Resources, Inc. (Title of Class of Securities) Class A Common Stock, Par Valu

February 27, 2018 EX-99.1

Alta Mesa Resources Announces Year-End 2017 Proved Reserves and Upstream Operational Update

EXHIBIT 99.1 Alta Mesa Resources Announces Year-End 2017 Proved Reserves and Upstream Operational Update HOUSTON, Feb. 27, 2018 (GLOBE NEWSWIRE) - Alta Mesa Resources, Inc. (NASDAQ:AMR) (NASDAQ:AMRWW) (“Alta Mesa” or the “Company”) today announced a summary of year-end 2017 proved reserves and provided an upstream operational update, including associated production and drilling activity. Year-End

February 27, 2018 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event Reported): February 27, 2018 Alta Mesa Resources, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-38040 81-4433840 (State or Other Jurisdiction of Incorporation) (Commission

February 20, 2018 SC 13D

AMR / Alta Mesa Resources / Silver Run Sponsor Ii, Llc - SC 13D Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. )* Alta Mesa Resources, Inc. (Name of Issuer) Class A Common Stock, par value $0.0001 (Title of Class of Securities) 82812A103 (CUSIP Number) Dianna Rosser Aprile c/o Riverstone Holdings LLC 712 Fifth Avenue, 36th Floor New York, NY 10019 (212) 993-0076 (Nam

February 20, 2018 EX-99.1

JOINT FILING AGREEMENT

Exhibit 1 JOINT FILING AGREEMENT The undersigned hereby agree that they are filing this statement jointly pursuant to Rule 13d-1(k)(1).

February 14, 2018 SC 13G

AMR / Alta Mesa Resources / Alyeska Investment Group, L.P. Passive Investment

| OMB APPROVAL | || |OMB NUMBER: | UNITED STATES |EXPIRES: | SECURITIES AND EXCHANGE COMMISSION | JUNE 30, 2012 | Washington, D.

February 14, 2018 SC 13G

AMR / Alta Mesa Resources / FIR TREE INC. - SILVER RUN ACQUISITION CORPORATION II Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* Silver Run Acquisition Corporation II (Name of Issuer) Class A Common Stock, par value $0.0001 per share (Title of Class of Securities) 82812A103 (CUSIP Number) December 31, 2017 (Date of Event Which Requires Filing of This Statement) Check the appropriate box to desig

February 14, 2018 EX-21.1

Subsidiaries of the Registrant.

Exhibit 21.1 SUBSIDIARIES SRII Opco GP, LLC SRII Opco, LP Alta Mesa Holdings GP, LLC Alta Mesa Holdings, LP Kingfisher Midstream, LLC Alta Mesa Financial Services Corp. OEM GP, LLC Alta Mesa Services, LP Oklahoma Energy Acquisitions, LP

February 14, 2018 SC 13G/A

AMR / Alta Mesa Resources / ORBIS INVESTMENT MANAGEMENT LTD - ORBIS INVESTMENT MANAGEMENT LIMITED Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* Silver Run Acquistion Corporation II (Name of Issuer) Common Stock (Title of Class of Securities) 82812A103 (CUSIP Number) December 31, 2017 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant

February 14, 2018 SC 13G/A

AMR / Alta Mesa Resources / HIGHFIELDS CAPITAL MANAGEMENT LP - FORM SC 13G/A Passive Investment

SC 13G/A 1 sc13ga-srun.htm FORM SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 1)* ALTA MESA RESOURCES, INC. (Formerly SILVER RUN ACQUISITION CORPORATION II) (Name of Issuer) CLASS A COMMON STOCK, $0.0001 PAR VALUE (Title of Class of Securities) 82812A103 (CUSIP Number) December 31, 2017 (Date

February 14, 2018 S-1

As filed with the Securities and Exchange Commission on February 14, 2018

Table of Contents As filed with the Securities and Exchange Commission on February 14, 2018 Registration No.

February 13, 2018 SC 13G/A

SRUNU / Silver Run Acquisition Corporation II / Adage Capital Partners GP LLC - SILVER RUN ACQUISITION CORPORATION II Passive Investment

SC 13G/A 1 p18-0198sc13ga.htm SILVER RUN ACQUISITION CORPORATION II SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 1)* Silver Run Acquisition Corporation II (Name of Issuer) Class A Common Stock, $0.0001 par value (Title of Class of Securities) 82812A202** (CUSIP Number) December 31, 2017 (Date of Event Which Requir

February 12, 2018 SC 13G

AMR / Alta Mesa Resources / Wellington Management Group LLP - SEC SCHEDULE 13G Passive Investment

SC 13G 1 SEC13GFiling.htm SEC SCHEDULE 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* SILVER RUN ACQUISITION CORPORATION II (Name of Issuer) Common Stock (Title of Class of Securities) 82812A103 (CUSIP Number) January 31, 2018 (Date of Event Which Requires Filing of this Statement) Check the appro

February 12, 2018 8-A12B/A

U.S. SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A/A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) OR 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 ALTA MESA RESOURCES, INC. SILVER RUN ACQUISITION COR

8-A12B/A 1 d496173d8a12ba.htm 8-A12B/A U.S. SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A/A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) OR 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 ALTA MESA RESOURCES, INC. (Formerly SILVER RUN ACQUISITION CORPORATION II) (Exact Name of Registrant as Specified in Its Charter) Delaware 81-4433840 (State or oth

February 9, 2018 EX-10.3

First Amendment to Credit Agreement and Limited Consent, dated as of February 9, 2018, by and among Kingfisher, each of the lenders from time to time party thereto and ABN AMRO Capital USA LLC, as administrative agent and LC Issuer (incorporated by reference to Exhibit 10.3 to the Registrant’s Current Report on Form 8-K filed with the SEC on February 9, 2018).

Exhibit 10.3 EXECUTION FIRST AMENDMENT TO CREDIT AGREEMENT AND LIMITED CONSENT THIS FIRST AMENDMENT TO CREDIT AGREEMENT AND LIMITED CONSENT (this ?Amendment?) is made as of February 9, 2018, but effective as of the First Amendment Effective Date set forth herein, by and among Kingfisher Midstream, LLC, a Delaware limited liability company (?Borrower?), ABN AMRO Capital USA LLC, as Administrative A

February 9, 2018 EX-10.17

Employment Agreement, dated as of February 9, 2018, by and between Alta Mesa Services, LP and David Murrell (incorporated by reference to Exhibit 10.17 to the Registrant’s Current Report on Form 8-K filed with the SEC on February 9, 2018).

Exhibit 10.17 Execution Copy EMPLOYMENT AGREEMENT THIS EMPLOYMENT AGREEMENT (the ?Agreement?), is made and entered into as of February 9, 2018 (the ?Effective Date?), by and between Alta Mesa Services, LP, a Texas limited partnership (the ?Company?), F. David Murrell (hereafter ?Executive?)and, solely with respect to Section 41, Alta Mesa Holdings, LP, a Texas limited partnership (?Alta Mesa?). Th

February 9, 2018 EX-10.18

Employment Agreement, dated as of February 9, 2018, by and between Alta Mesa Services, LP and Ronald J. Smith (incorporated by reference to Exhibit 10.18 to the Registrant’s Current Report on Form 8-K filed with the SEC on February 9, 2018).

Exhibit 10.18 Execution Copy EMPLOYMENT AGREEMENT THIS EMPLOYMENT AGREEMENT (the “Agreement”), is made and entered into as of February 9, 2018 (the “Effective Date”), by and between Alta Mesa Services, LP, a Texas limited partnership (the “Company”), Ronald J. Smith (hereafter “Executive”) and, solely with respect to Section 41, Alta Mesa Holdings, LP, a Texas limited partnership (“Alta Mesa”). Th

February 9, 2018 EX-10.20

Form of Stock Option Agreement under the Alta Mesa Resources Inc. 2018 Long Term Incentive Plan (incorporated by reference to Exhibit 10.20 to the Registrant’s Current Report on Form 8-K filed with the SEC on February 9, 2018).

EX-10.20 Exhibit 10.20 ALTA MESA RESOURCES, INC. 2018 LONG TERM INCENTIVE PLAN STOCK OPTION GRANT NOTICE Capitalized terms not specifically defined in this Stock Option Grant Notice (the “Grant Notice”) have the meanings given to them in the 2018 Long Term Incentive Plan (as amended from time to time, the “Plan”) of Alta Mesa Resources, Inc. (the “Company”). The Company has granted to the particip

February 9, 2018 EX-10.15

Employment Agreement, dated as of February 9, 2018, by and between Alta Mesa Services, LP and Michael A. McCabe (incorporated by reference to Exhibit 10.15 to the Registrant’s Current Report on Form 8-K filed with the SEC on February 9, 2018).

Exhibit 10.15 Execution Copy EMPLOYMENT AGREEMENT THIS EMPLOYMENT AGREEMENT (the ?Agreement?), is made and entered into as of February 9, 2018 (the ?Effective Date?), by and between Alta Mesa Services, LP, a Texas limited partnership (the ?Company?), Michael A. McCabe (hereafter ?Executive?)and, solely with respect to Section 41, Alta Mesa Holdings, LP, a Texas limited partnership (?Alta Mesa?). T

February 9, 2018 EX-10.19

Alta Mesa Resources Inc. 2018 Long Term Incentive Plan (incorporated by reference to Exhibit 10.19 to the Registrant’s Current Report on Form 8-K filed with the SEC on February 9, 2018).

Exhibit 10.19 ALTA MESA RESOURCES, INC. 2018 LONG TERM INCENTIVE PLAN ARTICLE I. PURPOSE The Plan’s purpose is to enhance the Company’s ability to attract, retain and motivate persons who make (or are expected to make) important contributions to the Company by providing these individuals with equity ownership opportunities. Capitalized terms used in the Plan are defined in Article XI. ARTICLE II.

February 9, 2018 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 9, 2018 Alta Mesa Resources, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38040 81-4433840 (State or other jurisdiction of incorporation) (Commiss

February 9, 2018 EX-99.1

Silver Run Acquisition Corporation II Completes its Business Combination with Alta Mesa Holdings, LP and Kingfisher Midstream, LLC and Becomes Alta Mesa Resources, Inc.

EX-99.1 Exhibit 99.1 FOR IMMEDIATE RELEASE Silver Run Acquisition Corporation II Completes its Business Combination with Alta Mesa Holdings, LP and Kingfisher Midstream, LLC and Becomes Alta Mesa Resources, Inc. HOUSTON, TX, February 9, 2018 – Silver Run Acquisition Corporation II (“Silver Run II”) (NASDAQ: SRUN, SRUNU, SRUNW) today announced that it completed its business combination with Alta Me

February 9, 2018 EX-3.1

Second Amended and Restated Certificate of Incorporation of Alta Mesa Resources, Inc. (incorporated by reference to Exhibit 3.1 to the Registrant’s Current Report on Form 8-K filed with the SEC on February 9, 2018).

Exhibit 3.1 SECOND AMENDED AND RESTATED CERTIFICATE OF INCORPORATION OF SILVER RUN ACQUISITION CORPORATION II February 9, 2018 Silver Run Acquisition Corporation II, a corporation organized and existing under the laws of the State of Delaware (the “Corporation”), DOES HEREBY CERTIFY AS FOLLOWS: 1. The name of the Corporation is “Silver Run Acquisition Corporation II”. The original certificate of i

February 9, 2018 EX-3.2

Certificate of Designation of Series A Preferred Stock (incorporated by reference to Exhibit 3.2 to the Registrant’s Current Report on Form 8-K filed with the SEC on February 9, 2018).

Exhibit 3.2 CERTIFICATE OF DESIGNATION OF SERIES A PREFERRED STOCK OF ALTA MESA RESOURCES, INC. Alta Mesa Resources, Inc. (f/k/a Silver Run Acquisition Corporation II), a Delaware corporation (the ?Corporation?), hereby certifies that, pursuant to the provisions of Sections 103, 141 and 151 of the General Corporation Law of the State of Delaware, on February 9, 2018, the board of directors of the

February 9, 2018 EX-10.12

Letter Agreement, dated as of February 9, 2018, by and between Alta Mesa Resources, Inc. and James T. Hackett (incorporated by reference to Exhibit 10.12 to the Registrant’s Current Report on Form 8-K filed with the SEC on February 9, 2018).

Exhibit 10.12 February 9, 2018 James T. Hackett c/o Alta Mesa Resources, Inc. 1000 Louisiana Street, Suite 1450 Houston, Texas 77002 Re: Vesting Provisions Dear Jim: In connection with your employment by Alta Mesa Resources, Inc. (known prior to the consummation of its initial business combination as Silver Run Acquisition Corporation II) or any of its subsidiaries (together, the ?Company?), you w

February 9, 2018 EX-10.23

Director Compensation Program (incorporated by reference to Exhibit 10.23 to the Registrant’s Current Report on Form 8-K filed with the SEC on February 9, 2018).

EX-10.23 Exhibit 10.23 ALTA MESA RESOURCES, INC. DIRECTOR COMPENSATION PROGRAM Eligible Directors (as defined below), as members of the board of directors (the “Board”) of Alta Mesa Resources, Inc. (the “Company”), shall receive cash compensation as set forth in this Director Compensation Program (this “Program”). Such compensation shall be paid automatically and without further action of the Boar

February 9, 2018 EX-10.10

Amended and Restated Voting Agreement, by and among Alta Mesa Holdings GP, LLC, BCE-AMH Holdings, LLC, BCE-MESA Holdings, LLC, Mezzanine Partiers II Delaware Subsidiary, LLC, Offshore Mezzanine Partners Master Fund II, L.P., Institutional Mezzanine Partners II Subsidiary, L.P., AP Mezzanine Partners II, L.P., The Northwestern Mutual Life Insurance Company, The Northwestern Mutual Life Insurance Company For its Group Annuity Separate Account, Northwestern Mutual Capital Strategic Equity Fund III, L.P., Michael E. Ellis, Harlan H. Chappelle and SRII Opco, LP, dated as of February 9, 2018 (incorporated by reference to Exhibit 10.10 to the Registrant’s Current Report on Form 8-K filed with the SEC on February 9, 2018).

EX-10.10 Exhibit 10.10 Execution Version AMENDED AND RESTATED VOTING AGREEMENT This AMENDED AND RESTATED VOTING AGREEMENT (this “Agreement”) is made and entered into effective as of February 9, 2018 (the “Effective Date”) by and among Alta Mesa Holdings GP, LLC, a Delaware limited liability company (the “General Partner”), BCE-AMH Holdings, LLC, a Delaware limited liability company (“BCE-AMH”), BC

February 9, 2018 EX-10.16

Employment Agreement, dated as of February 9, 2018, by and between Alta Mesa Services, LP and Homer “Gene” Cole (incorporated by reference to Exhibit 10.16 to the Registrant’s Current Report on Form 8-K filed with the SEC on February 9, 2018).

Exhibit 10.16 Execution Copy EMPLOYMENT AGREEMENT THIS EMPLOYMENT AGREEMENT (the ?Agreement?), is made and entered into as of February 9, 2018 (the ?Effective Date?), by and between Alta Mesa Services, LP, a Texas limited partnership (the ?Company?), Homer E. Cole (hereafter ?Executive?)and, solely with respect to Section 41, Alta Mesa Holdings, LP, a Texas limited partnership (?Alta Mesa?). The C

February 9, 2018 EX-10.7

Form of Indemnity Agreement with Directors (incorporated by reference to Exhibit 10.7 to the Registrant’s Current Report on Form 8-K filed with the SEC on February 9, 2018).

EX-10.7 Exhibit 10.7 FORM OF INDEMNITY AGREEMENT THIS INDEMNITY AGREEMENT (this “Agreement”) is made as of February 9, 2018, by and between Alta Mesa Resources, Inc., a Delaware corporation (the “Company”), and [•] (“Indemnitee”). RECITALS WHEREAS, highly competent persons have become more reluctant to serve publicly-held corporations as directors, officers or in other capacities unless they are p

February 9, 2018 8-K

Changes in Control of Registrant, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Change in Shell Company Status, Entry into a Material Definitive Agreement, Unregistered Sales of Equity Securities, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant, Completion of Acquisition or Disposition of Assets

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 9, 2018 Alta Mesa Resources, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38040 81-4433840 (State or other jurisdiction of incorporation) (Commiss

February 9, 2018 EX-10.2

Credit Agreement, dated as of August 8, 2017, by and among Kingfisher, each of the lenders from time to time party thereto and ABN AMRO Capital USA LLC, as administrative agent and LC Issuer (incorporated by reference to Exhibit 10.2 to the Registrant’s Current Report on Form 8-K filed with the SEC on February 9, 2018).

Exhibit 10.2 EXECUTION COPY CREDIT AGREEMENT KINGFISHER MIDSTREAM, LLC, as Borrower, ABN AMRO CAPITAL USA LLC, as Administrative Agent and LC Issuer, and CERTAIN FINANCIAL INSTITUTIONS, as Lenders, $200,000,000 August 8, 2017 ABN AMRO CAPITAL USA LLC as Sole Bookrunner and Sole Lead Arranger EAST WEST BANK as Syndication Agent WELLS FARGO BANK, NA as Documentation Agent CREDIT AGREEMENT TABLE OF C

February 9, 2018 EX-10.5

Tax Receivable Agreement dated as of February 9, 2018, by and among the Registrant, SRII Opco, LP, Riverstone VI Alta Mesa, L.P., and High Mesa Holdings LP (incorporated by reference to Exhibit 10.5 to the Registrant’s Current Report on Form 8-K filed with the SEC on February 9, 2018).

Exhibit 10.5 Execution Version TAX RECEIVABLE AGREEMENT This TAX RECEIVABLE AGREEMENT (as amended from time to time, this ?Agreement?), dated as of February 9, 2018, is hereby entered into by and among Alta Mesa Resources, Inc. (f/k/a Silver Run Acquisition Corporation II), a Delaware corporation (the ?Corporation?), SRII Opco, LP, a Delaware limited partnership (?Holdings?), Riverstone VI Alta Me

February 9, 2018 EX-10.4

Amended and Restated Agreement of Limited Partnership of SRII Opco, LP, dated February 9, 2018 (incorporated by reference to Exhibit 10.4 to the Registrant’s Current Report on Form 8-K filed with the SEC on February 9, 2018).

EX-10.4 Exhibit 10.4 Execution Version AMENDED AND RESTATED AGREEMENT OF LIMITED PARTNERSHIP OF SRII OPCO, LP Dated as of February 9, 2018 THE UNITS REPRESENTED BY THIS AMENDED AND RESTATED AGREEMENT OF LIMITED PARTNERSHIP HAVE NOT BEEN REGISTERED UNDER THE UNITED STATES SECURITIES ACT OF 1933, AS AMENDED, OR UNDER ANY OTHER APPLICABLE SECURITIES LAWS. SUCH UNITS MAY NOT BE SOLD, ASSIGNED, PLEDGED

February 9, 2018 EX-10.22

Form of Restricted Stock Agreement under the Alta Mesa Resources Inc. 2018 Long Term Incentive Plan (incorporated by reference to Exhibit 10.22 to the Registrant’s Current Report on Form 8-K filed with the SEC on February 9, 2018).

Exhibit 10.22 ALTA MESA RESOURCES, INC. 2018 LONG TERM INCENTIVE PLAN RESTRICTED STOCK GRANT NOTICE Capitalized terms not specifically defined in this Restricted Stock Grant Notice (the ?Grant Notice?) have the meanings given to them in the 2018 Long Term Incentive Plan (as amended from time to time, the ?Plan?) of Alta Mesa Resources, Inc. (the ?Company?). The Company has granted to the participa

February 9, 2018 EX-10.9

Management Services Agreement dated February 9, 2018 by and between Alta Mesa Holdings, LP and High Mesa, Inc. (incorporated by reference to Exhibit 10.9 to the Registrant’s Current Report on Form 8-K filed with the SEC on February 9, 2018).

Exhibit 10.9 Execution Version MANAGEMENT SERVICES AGREEMENT By and Between: ALTA MESA HOLDINGS, LP, as the “Agent” and HIGH MESA, INC., as the “Company” February 9, 2018 TABLE OF CONTENTS Page ARTICLE 1 DEFINITIONS 1 1.1 Certain Defined Terms 1 1.2 Interpretation 5 ARTICLE 2 SERVICES 6 2.1 Engagement 6 2.2 Services 6 2.3 Limitation on Powers and Duties 8 2.4 Independent Contractor Status 8 2.5 Pe

February 9, 2018 EX-21.1

Subsidiaries of the Registrant.

EX-21.1 30 d508878dex211.htm EX-21.1 Exhibit 21.1 SUBSIDIARIES SRII Opco GP, LLC SRII Opco, LP Alta Mesa Holdings GP, LLC Alta Mesa Holdings, LP Kingfisher Midstream, LLC Alta Mesa Financial Services Corp. OEM GP, LLC Alta Mesa Services, LP Oklahoma Energy Acquisitions, LP 32

February 9, 2018 EX-10.8

Form of Indemnity Agreement Amendment (incorporated by reference to Exhibit 10.8 to the Registrant’s Current Report on Form 8-K filed with the SEC on February 9, 2018).

Exhibit 10.8 FORM OF AMENDMENT NO. 1 TO THE INDEMNITY AGREEMENT This Amendment No. 1 (this ?Amendment?) to that certain Indemnity Agreement, dated March 29, 2017 (the ?Original Agreement?), by and between Alta Mesa Resources, Inc., a Delaware corporation (the ?Company?) (formerly, Silver Run Acquisition Corporation II), and [?] (the ?Indemnitee?), is entered into by Company and Indemnitee and is d

February 9, 2018 EX-10.6

Restrictive Covenant Agreement, dated February 9, 2018, by and between the Registrant and Asset Risk Management, LLC (incorporated by reference to Exhibit 10.6 to the Registrant’s Current Report on Form 8-K filed with the SEC on February 9, 2018).

Exhibit 10.6 Execution Version RESTRICTIVE COVENANT AGREEMENT THIS RESTRICTIVE COVENANT AGREEMENT (this “Agreement”) is entered into as of February 9, 2018, by and between Alta Mesa Resources, Inc., a Delaware corporation (“Buyer”), and Asset Risk Management, LLC, a Delaware limited liability company (the “Restricted Party”). Capitalized terms used and not otherwise defined in this Agreement have

February 9, 2018 EX-10.21

Form of Restricted Stock Unit Agreement under the Alta Mesa Resources Inc. 2018 Long Term Incentive Plan (incorporated by reference to Exhibit 10.21 to the Registrant’s Current Report on Form 8-K filed with the SEC on February 9, 2018).

EX-10.21 Exhibit 10.21 ALTA MESA RESOURCES, INC. 2018 LONG TERM INCENTIVE PLAN RESTRICTED STOCK UNIT GRANT NOTICE Capitalized terms not specifically defined in this Restricted Stock Unit Grant Notice (the “Grant Notice”) have the meanings given to them in the 2018 Long Term Incentive Plan (as amended from time to time, the “Plan”) of Alta Mesa Resources, Inc. (the “Company”). The Company has grant

February 9, 2018 EX-10.13

Employment Agreement, dated as of February 9, 2018, by and between Alta Mesa Services, LP and Harlan H. Chappelle (incorporated by reference to Exhibit 10.13 to the Registrant’s Current Report on Form 8-K filed with the SEC on February 9, 2018).

Exhibit 10.13 Execution Copy EMPLOYMENT AGREEMENT THIS EMPLOYMENT AGREEMENT (the ?Agreement?), is made and entered into as of February 9, 2018 (the ?Effective Date?), by and between Alta Mesa Services, LP, a Texas limited partnership (the ?Company?), Harlan H. Chappelle (hereafter ?Executive?) and, solely with respect to Section 41, Alta Mesa Holdings, LP, a Texas limited partnership (?Alta Mesa?)

February 9, 2018 EX-10.1

Eighth Amended and Restated Credit Agreement dated as of February 9, 2018 among Alta Mesa Holdings, LP, Alta Mesa Resources, Inc., the lenders party hereto from time to time, and Wells Fargo Bank, National Association, as administrative agent for such Lenders (incorporated by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K filed with the SEC on February 9, 2018).

Exhibit 10.1 Execution Version CUSIP#: 02133HAE8 $1,000,000,000 EIGHTH AMENDED AND RESTATED CREDIT AGREEMENT Among ALTA MESA HOLDINGS, LP as Borrower, THE LENDERS PARTY HERETO FROM TIME TO TIME as Lenders, and WELLS FARGO BANK, NATIONAL ASSOCIATION as Administrative Agent and as Issuing Lender February 9, 2018 Wells Fargo Securities, LLC as Sole Lead Arranger and Sole Bookrunner Capital One, Natio

February 9, 2018 EX-3.3

Certificate of Designation of Series B Preferred Stock (incorporated by reference to Exhibit 3.3 to the Registrant’s Current Report on Form 8-K filed with the SEC on February 9, 2018).

EX-3.3 Exhibit 3.3 CERTIFICATE OF DESIGNATION OF SERIES B PREFERRED STOCK OF ALTA MESA RESOURCES, INC. Alta Mesa Resources, Inc. (f/k/a Silver Run Acquisition Corporation II), a Delaware corporation (the “Corporation”), hereby certifies that, pursuant to the provisions of Sections 103, 141 and 151 of the General Corporation Law of the State of Delaware, on February 9, 2018, the board of directors

February 9, 2018 EX-10.11

Operating Transition Services Agreement, dated February 9, 2018, by and between Kingfisher Midstream, LLC, and Asset Risk Management, LLC (incorporated by reference to Exhibit 10.11 to the Registrant’s Current Report on Form 8-K filed with the SEC on February 9, 2018).

Exhibit 10.11 OPERATING TRANSITION SERVICES AGREEMENT By and Between: KINGFISHER MIDSTREAM, LLC, as the ?Owner? and ASSET RISK MANAGEMENT, LLC, as the ?Operator? February 9, 2018 TABLE OF CONTENTS Page ARTICLE 1 DEFINITIONS 4 1.1 Defined Terms 4 1.2 Certain Additional Defined Terms 8 1.3 Rules of Interpretation 8 ARTICLE 2 TERMINATION OF OPERATING AGREEMENT; APPOINTMENT AND TERM 9 2.1 Operating Ag

February 9, 2018 EX-10.14

Employment Agreement, dated as of February 9, 2018, by and between Alta Mesa Services, LP and Michael E. Ellis (incorporated by reference to Exhibit 10.14 to the Registrant’s Current Report on Form 8-K filed with the SEC on February 9, 2018).

Exhibit 10.14 Execution Copy EMPLOYMENT AGREEMENT THIS EMPLOYMENT AGREEMENT (the ?Agreement?), is made and entered into as of February 9, 2018 (the ?Effective Date?), by and between Alta Mesa Services, LP, a Texas limited partnership (the ?Company?), Michael E. Ellis (hereafter ?Executive?) and, solely with respect to Section 41, Alta Mesa Holdings, LP, a Texas limited partnership (?Alta Mesa?). T

February 9, 2018 EX-4.2

Amendment No. 1 to Registration Rights Agreement, dated as of February 9, 2018, by and among Alta Mesa Resources, Inc., Silver Run Sponsor II, L.L.C., and the other holders party thereto (incorporated by reference to Exhibit 4.2 to the Registrant’s Current Report on Form 8-K filed with the SEC on February 9, 2018).

EX-4.2 Exhibit 4.2 AMENDMENT NO. 1 TO REGISTRATION RIGHTS AGREEMENT This Amendment No. 1, dated as of February 9, 2018 (this “Amendment”) to the Registration Rights Agreement, dated as of March 23, 2017 (the “Original Agreement”), is by and among Silver Run Acquisition Corporation II, a Delaware corporation (the “Company”), Silver Run Sponsor II, LLC, a Delaware limited liability company (the “Spo

February 9, 2018 EX-4.1

Registration Rights Agreement, dated as of February 9, 2018, by and among Alta Mesa Resources, Inc., High Mesa Holdings, L.P., KFM Holdco, LLC and Riverstone VI Alta Mesa Holdings, L.P. (incorporated by reference to Exhibit 4.1 to the Registrant’s Current Report on Form 8-K filed with the SEC on February 9, 2018).

EX-4.1 Exhibit 4.1 REGISTRATION RIGHTS AGREEMENT This REGISTRATION RIGHTS AGREEMENT (this “Agreement”) is made as of February 9, 2018 by and among Alta Mesa Resources, Inc. a Delaware corporation (the “Company”), High Mesa Holdings, L.P., a Delaware limited partnership (“High Mesa Holdings”), KFM Holdco, LLC, a Delaware limited liability company (the “Kingfisher Contributor”), and Riverstone VI Al

February 7, 2018 EX-99

JOINT FILING AGREEMENT

Exhibit 99 JOINT FILING AGREEMENT In accordance with Rule 13d-1(k)(1) promulgated under the Securities Exchange Act of 1934, as amended, the undersigned hereby agree to the joint filing with each other on behalf of each of them of such a statement on Schedule 13G with respect to the common stock beneficially owned by each of them of Silver Run Acquisition Corp II.

February 7, 2018 SC 13G

AMR / Alta Mesa Resources / Silver Run Sponsor Ii, Llc - SC 13G Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G (Rule 13d-102) Information to be Included in Statements Filed Pursuant to § 240.13d-1(b), (c) and (d) and Amendments Thereto Filed Pursuant to § 240.13d-2 Under the Securities Exchange Act of 1934 (Amendment No. )* Silver Run Acquisition Corp II (Name of Issuer) Class A Common Stock (Title of Class of Securities) 82812A103 (CUS

February 7, 2018 EX-24

POWER OF ATTORNEY

Exhibit 24 POWER OF ATTORNEY Know all by these presents, that the undersigned hereby constitutes and appoints Stephen S.

February 6, 2018 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 6, 2018 SILVER RUN ACQUISITION CORPORATION II (Exact name of registrant as specified in its charter) Delaware 001-38040 81-4433840 (State or other jurisdiction of incorporati

February 5, 2018 EX-99.1

Press Release dated February 5, 2018.

EX-99.1 Exhibit 99.1 FOR IMMEDIATE RELEASE Silver Run Acquisition Corporation II Announces Approximately $1,042 million in Trust to Complete Business Combination HOUSTON, TX, February 5, 2018 – Silver Run Acquisition Corporation II (“Silver Run II”) (NASDAQ: SRUN, SRUNU, SRUNW) today announced that, in connection with its proposed business combination with Alta Mesa Holdings, LP (“Alta Mesa”) and

February 5, 2018 EX-99.1

Silver Run Acquisition Corporation II Announces Approximately $1,042 million in Trust to Complete Business Combination

Exhibit 99.1 FOR IMMEDIATE RELEASE Silver Run Acquisition Corporation II Announces Approximately $1,042 million in Trust to Complete Business Combination HOUSTON, TX, February 5, 2018 ? Silver Run Acquisition Corporation II (?Silver Run II?) (NASDAQ: SRUN, SRUNU, SRUNW) today announced that, in connection with its proposed business combination with Alta Mesa Holdings, LP (?Alta Mesa?) and Kingfish

February 5, 2018 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Other Events, 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 5, 2018 SILVER RUN ACQUISITION CORPORATION II (Exact name of registrant as specified in its charter) Delaware 001-38040 81-4433840 (State or other jurisdiction of incorporati

February 5, 2018 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 5, 2018 SILVER RUN ACQUI

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 5, 2018 SILVER RUN ACQUISITION CORPORATION II (Exact name of registrant as specified in its charter) Delaware 001-38040 81-4433840 (State or other jurisdiction of incorporati

January 22, 2018 LETTER

LETTER

Mail Stop 4628 January 22, 2018 James T. Hackett Chief Executive Officer Silver Run Acquisition Corporation II 1000 Louisiana Street, Suite 1450 Houston, TX 77002 Re: Silver Run Acquisition Corporation II Preliminary Proxy Statement on Schedule 14A Filed September 25, 2017 File No. 001-38040 Dear Mr. Hackett We have completed our review of your filing. We remind you that the company and its manage

January 22, 2018 EX-99.1

Silver Run Acquisition Corporation II Announces Special Meeting of Stockholders and Record Date

Exhibit 99.1 FOR IMMEDIATE RELEASE Silver Run Acquisition Corporation II Announces Special Meeting of Stockholders and Record Date HOUSTON, TX, January 22, 2018 ? Silver Run Acquisition Corporation II (?Silver Run II?) (NASDAQ: SRUN, SRUNU, SRUNW) today announced that it has set a record date of January 22, 2018 for and in advance of its special meeting of stockholders with respect to its proposed

January 22, 2018 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 22, 2018 SILVER RUN ACQUI

Form 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 22, 2018 SILVER RUN ACQUISITION CORPORATION II (Exact name of registrant as specified in its charter) Delaware 001-38040 81-4433840 (State or other jurisdiction of in

January 22, 2018 EX-99.1

Press Release dated January 22, 2018.

EX-99.1 Exhibit 99.1 FOR IMMEDIATE RELEASE Silver Run Acquisition Corporation II Announces Special Meeting of Stockholders and Record Date HOUSTON, TX, January 22, 2018 – Silver Run Acquisition Corporation II (“Silver Run II”) (NASDAQ: SRUN, SRUNU, SRUNW) today announced that it has set a record date of January 22, 2018 for and in advance of its special meeting of stockholders with respect to its

January 22, 2018 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 22, 2018 SILVER RUN ACQUI

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 22, 2018 SILVER RUN ACQUISITION CORPORATION II (Exact name of registrant as specified in its charter) Delaware 001-38040 81-4433840 (State or other jurisdiction of incorporati

January 19, 2018 DEFM14A

Unaudited pro forma condensed consolidated combined financial information of Silver Run for the year ended December 31, 2016 and the nine months ended September 30, 2016 (incorporated by reference to Silver Run’s definitive proxy statement filed with the SEC on January 19, 2018).

DEFM14A Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

January 12, 2018 PRER14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. 3)

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. 3) Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission Only (as permitted by Rule 1

January 12, 2018 8-K/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A (Amendment No. 1) CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 12, 2

Form 8-K Amendment No. 1 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A (Amendment No. 1) CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 12, 2018 (September 14, 2017) SILVER RUN ACQUISITION CORPORATION II (Exact name of registrant as specified in its charter) Delawar

January 12, 2018 8-K/A

Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A (Amendment No. 1) CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 12, 2018 (August 16, 2017) SILVER RUN ACQUISITION CORPORATION II (Exact name of registrant as specified in its charter) Delaware 001-38040 81-4433840 (Stat

January 12, 2018 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A (Amendment No. 1) CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 12, 2

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A (Amendment No. 1) CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 12, 2018 (October 3, 2017) SILVER RUN ACQUISITION CORPORATION II (Exact name of registrant as specified in its charter) Delaware 001-38040 81-4433840 (Stat

January 12, 2018 8-K/A

Regulation FD Disclosure, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A (Amendment No. 1) CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 12, 2018 (October 3, 2017) SILVER RUN ACQUISITION CORPORATION II (Exact name of registrant as specified in its charter) Delaware 001-38040 81-4433840 (Stat

January 12, 2018 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A (Amendment No. 1) CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 12, 2

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A (Amendment No. 1) CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 12, 2018 (September 14, 2017) SILVER RUN ACQUISITION CORPORATION II (Exact name of registrant as specified in its charter) Delaware 001-38040 81-4433840 (S

January 12, 2018 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A (Amendment No. 1) CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 12, 2

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A (Amendment No. 1) CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 12, 2018 (August 16, 2017) SILVER RUN ACQUISITION CORPORATION II (Exact name of registrant as specified in its charter) Delaware 001-38040 81-4433840 (Stat

January 9, 2018 EX-99.1

Disclaimer Forward-Looking Statements The information in this presentation and the oral statements made in connection therewith include ?forward-looking statements? within the meaning of Section 27A of the Securities Act and Section 21E of the Securi

Alta Mesa Resources, Inc. Goldman Sachs Global Energy Conference 2018 January 2018 Exhibit 99.1 Disclaimer Forward-Looking Statements The information in this presentation and the oral statements made in connection therewith include ?forward-looking statements? within the meaning of Section 27A of the Securities Act and Section 21E of the Securities Exchange Act of 1934, as amended. All statements,

January 9, 2018 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 9, 2018 SILVER RUN ACQUIS

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 9, 2018 SILVER RUN ACQUISITION CORPORATION II (Exact name of registrant as specified in its charter) Delaware 001-38040 81-4433840 (State or other jurisdiction of incorporatio

January 9, 2018 EX-99.1

Investor Presentation dated January 2018.

Alta Mesa Resources, Inc. Goldman Sachs Global Energy Conference 2018 January 2018 Exhibit 99.1 Disclaimer Forward-Looking Statements The information in this presentation and the oral statements made in connection therewith include ?forward-looking statements? within the meaning of Section 27A of the Securities Act and Section 21E of the Securities Exchange Act of 1934, as amended. All statements,

January 9, 2018 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 9, 2018 SILVER RUN ACQUIS

Form 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 9, 2018 SILVER RUN ACQUISITION CORPORATION II (Exact name of registrant as specified in its charter) Delaware 001-38040 81-4433840 (State or other jurisdiction of inc

December 11, 2017 SC 13G/A

SRUNU / Silver Run Acquisition Corporation II / ORBIS INVESTMENT MANAGEMENT LTD - ORBIS INVESTMENT MANAGEMENT LIMITED Passive Investment

SC 13G/A 1 srunua1121017.htm ORBIS INVESTMENT MANAGEMENT LIMITED UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* Silver Run Acquisition Corporation II (Name of Issuer) Units, each consisting of one share of Class A common stock, $0.0001 par value, and one-third of one warrant (Title of Class of Securi

December 11, 2017 SC 13G

AMR / Alta Mesa Resources / ORBIS INVESTMENT MANAGEMENT LTD - ORBIS INVESTMENT MANAGEMENT LIMITED Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 Silver Run Acquistion Corporation II (Name of Issuer) Common Stock (Title of Class of Securities) 82812A103 (CUSIP Number) November 30, 2017 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Sched

November 28, 2017 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 27, 2017 SILVER RUN ACQU

Form 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 27, 2017 SILVER RUN ACQUISITION CORPORATION II (Exact name of registrant as specified in its charter) Delaware 001-38040 81-4433840 (State or other jurisdiction of i

November 28, 2017 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 27, 2017 SILVER RUN ACQU

Form 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 27, 2017 SILVER RUN ACQUISITION CORPORATION II (Exact name of registrant as specified in its charter) Delaware 001-38040 81-4433840 (State or other jurisdiction of i

November 28, 2017 EX-99.1

Alta Mesa Resources, Inc. Exceptional,

Exhibit 99.1 Alta Mesa Resources, Inc. Exceptional, De-Risked Assets Experienced, Disciplined, Technology-Driven Management Investor Update November 2017 Disclaimer FORWARD-LOOKING STATEMENTS The information in this presentation and the oral statements made in connection therewith include ?forward-looking statements? within the meaning of Section 27A of the Securities Act and Section 21E of the Se

November 28, 2017 EX-99.1

Investor Presentation dated November 2017.

Exhibit 99.1 Alta Mesa Resources, Inc. Exceptional, De-Risked Assets Experienced, Disciplined, Technology-Driven Management Investor Update November 2017 Disclaimer FORWARD-LOOKING STATEMENTS The information in this presentation and the oral statements made in connection therewith include ?forward-looking statements? within the meaning of Section 27A of the Securities Act and Section 21E of the Se

November 24, 2017 PRER14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. 2)

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. 2) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☒ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 1

November 22, 2017 CORRESP

Silver Run Acquisition Corporation II 1000 Louisiana Street, Suite 1450 Houston, TX 77002

CORRESP Silver Run Acquisition Corporation II 1000 Louisiana Street, Suite 1450 Houston, TX 77002 November 22, 2017 Via EDGAR Securities and Exchange Commission Division of Corporation Finance 100 F.

November 16, 2017 LETTER

LETTER

Mail Stop 4628 November 16, 2017 James T. Hackett Chief Executive Officer Silver Run Acquisition Corporation II 1000 Louisiana Street, Suite 1450 Houston, TX 77002 Re: Silver Run Acquisition Corporation II Revised Preliminary Proxy Statement on Schedule 14A Filed October 31, 2017 File No. 001-38040 Form 8-K Soliciting materials filed pursuant to Exchange Act Rule 14a-12 Filed August 17, 2017 File

November 13, 2017 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2017 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-38040

October 31, 2017 CORRESP

Silver Run Acquisition Corporation II 1000 Louisiana Street, Suite 1450 Houston, TX 77002

CORRESP Silver Run Acquisition Corporation II 1000 Louisiana Street, Suite 1450 Houston, TX 77002 October 31, 2017 Via EDGAR Securities and Exchange Commission Division of Corporation Finance 100 F.

October 31, 2017 PRER14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. 1)

Table of Contents Index to Financial Statements UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

October 23, 2017 LETTER

LETTER

Mail Stop 4628 October 20, 2017 James T. Hackett Chief Executive Officer Silver Run Acquisition Corporation II 1000 Louisiana Street, Suite 1450 Houston, TX 77002 Re: Silver Run Acquisition Corporation II Preliminary Proxy Statement on Schedule 14A Filed September 25, 2017 File No. 001-38040 Form 8-K Soliciting materials filed pursuant to Exchange Act Rule 14a-12 Filed August 17, 2017 File No. 1-3

October 3, 2017 EX-99.1

Alta Mesa Resources, Inc. STACK-Focused Investor Presentation October 2017

Exhibit 99.1 Alta Mesa Resources, Inc. STACK-Focused Investor Presentation October 2017 Disclaimer FORWARD-LOOKING STATEMENTS The information in this presentation and the oral statements made in connection therewith include “forward-looking statements” within the meaning of Section 27A of the Securities Act and Section 21E of the Securities Exchange Act of 1934, as amended. All statements, other t

October 3, 2017 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 3, 2017 SILVER RUN ACQUIS

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 3, 2017 SILVER RUN ACQUISITION CORPORATION II (Exact name of registrant as specified in its charter) Delaware 001-38040 81-4433840 (State or other jurisdiction of incorporatio

October 3, 2017 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 3, 2017 SILVER RUN ACQUIS

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 3, 2017 SILVER RUN ACQUISITION CORPORATION II (Exact name of registrant as specified in its charter) Delaware 001-38040 81-4433840 (State or other jurisdiction of incorpor

October 3, 2017 EX-99.1

Investor Presentation dated October 3, 2017.

Exhibit 99.1 Alta Mesa Resources, Inc. STACK-Focused Investor Presentation October 2017 Disclaimer FORWARD-LOOKING STATEMENTS The information in this presentation and the oral statements made in connection therewith include ?forward-looking statements? within the meaning of Section 27A of the Securities Act and Section 21E of the Securities Exchange Act of 1934, as amended. All statements, other t

September 25, 2017 PREM14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ? Defi

September 14, 2017 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: September 14, 2017 SILVER RUN ACQUISITION CORPORATION II (Exact name of registrant as specified in its charter) Delaware 001-38040 81-4433840 (State or other jurisdiction of incorporation) (Commission File Number) (I.

September 14, 2017 EX-99.1

Disclaimer FORWARD-LOOKING STATEMENTS The information in this presentation and the oral statements made in connection therewith include “forward-looking statements” within the meaning of Section 27A of the Securities Act and Section 21E of the Securi

Exhibit 99.1 Exhibit 99.1 September 2017 Alta Mesa Resources, Inc. Investor Presentation Disclaimer FORWARD-LOOKING STATEMENTS The information in this presentation and the oral statements made in connection therewith include ?forward-looking statements? within the meaning of Section 27A of the Securities Act and Section 21E of the Securities Exchange Act of 1934, as amended. All statements, other

September 14, 2017 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: September 14, 2017 SILVER RUN ACQUISITION CORPORATION II (Exact nam

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: September 14, 2017 SILVER RUN ACQUISITION CORPORATION II (Exact name of registrant as specified in its charter) Delaware 001-38040 81-4433840 (State or other jurisdiction of incorporation) (Commission File Number) (I.

September 14, 2017 EX-99.1

Investor Presentation dated September 14, 2017.

Exhibit 99.1 Exhibit 99.1 September 2017 Alta Mesa Resources, Inc. Investor Presentation Disclaimer FORWARD-LOOKING STATEMENTS The information in this presentation and the oral statements made in connection therewith include ?forward-looking statements? within the meaning of Section 27A of the Securities Act and Section 21E of the Securities Exchange Act of 1934, as amended. All statements, other

August 17, 2017 EX-2.1

CONTRIBUTION AGREEMENT by and among HIGH MESA HOLDINGS, LP HIGH MESA HOLDINGS GP, LLC, ALTA MESA HOLDINGS, LP, ALTA MESA HOLDINGS GP, LLC, SILVER RUN ACQUISITION CORPORATION II, solely for purposes of Section 6.7, Section 10.3 and Section 11.13, the

Exhibit 2.1 Execution Version CONTRIBUTION AGREEMENT by and among HIGH MESA HOLDINGS, LP HIGH MESA HOLDINGS GP, LLC, ALTA MESA HOLDINGS, LP, ALTA MESA HOLDINGS GP, LLC, SILVER RUN ACQUISITION CORPORATION II, solely for purposes of Section 6.7, Section 10.3 and Section 11.13, the Contributor Owners party hereto, and, also for purposes of Section 6.6(j), Michael E. Ellis Dated as of August 16, 2017

August 17, 2017 EX-2.2

Contribution Agreement, dated as of August 16, 2017, among KFM Holdco, LLC, Kingfisher Midstream, LLC, the Registrant and the Contributor Members party thereto (incorporated by reference to Exhibit 2.2 of the Registrant’s Form 8-K filed with the SEC on August 17, 2017).

Exhibit 2.2 Execution Version CONTRIBUTION AGREEMENT by and among KFM HOLDCO, LLC, KINGFISHER MIDSTREAM, LLC SILVER RUN ACQUISITION CORPORATION II and, solely for purposes of Sections 10.9 and 11.13, the Contributor Members party hereto Dated as of August 16, 2017 TABLE OF CONTENTS ARTICLE I DEFINITIONS AND CONSTRUCTION 1 1.1 Definitions 1 1.2 Rules of Construction 21 ARTICLE II CONTRIBUTION AND C

August 17, 2017 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 17, 2017 (August 16, 2017)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 17, 2017 (August 16, 2017) SILVER RUN ACQUISITION CORPORATION II (Exact name of registrant as specified in its charter) Delaware 001-38040 81-4433840 (State or other jurisdicti

August 17, 2017 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 17, 2017 (August 16, 2017)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 17, 2017 (August 16, 2017) SILVER RUN ACQUISITION CORPORATION II (Exact name of registrant as specified in its charter) Delaware 001-38040 81-4433840 (State or other jurisdicti

August 17, 2017 EX-2.2

CONTRIBUTION AGREEMENT by and among KFM HOLDCO, LLC, KINGFISHER MIDSTREAM, LLC SILVER RUN ACQUISITION CORPORATION II and, solely for purposes of Sections 10.9 and 11.13, the Contributor Members party hereto Dated as of August 16, 2017

Exhibit 2.2 Execution Version CONTRIBUTION AGREEMENT by and among KFM HOLDCO, LLC, KINGFISHER MIDSTREAM, LLC SILVER RUN ACQUISITION CORPORATION II and, solely for purposes of Sections 10.9 and 11.13, the Contributor Members party hereto Dated as of August 16, 2017 TABLE OF CONTENTS ARTICLE I DEFINITIONS AND CONSTRUCTION 1 1.1 Definitions 1 1.2 Rules of Construction 21 ARTICLE II CONTRIBUTION AND C

August 17, 2017 EX-10.1

FORWARD PURCHASE AGREEMENT

Exhibit 10.1 Execution Version FORWARD PURCHASE AGREEMENT This Forward Purchase Agreement (this ?Agreement?) is entered into as of August 16, 2017, between Silver Run Acquisition Corporation II, a Delaware corporation (the ?Company?), and Riverstone VI SR II Holdings, L.P., a Delaware limited partnership (the ?Purchaser?). Recitals WHEREAS, the Company was formed for the purpose of effecting a mer

August 17, 2017 EX-99.1

Alta Mesa Resources Pure-Play STACK Enterprise August 2017

Exhibit 99.1 Alta Mesa Resources Pure-Play STACK Enterprise August 2017 Disclaimer FORWARD-LOOKING STATEMENTS The information in this presentation and the oral statements made in connection therewith include ?forward -looking statements? within the meaning of Section 27A of the Securities Act and Section 21E of the Securities Exchange Act of 1934, as amended. A ll statements, other than statements

August 17, 2017 EX-99.1

Alta Mesa Resources Pure-Play STACK Enterprise August 2017

Exhibit 99.1 Alta Mesa Resources Pure-Play STACK Enterprise August 2017 Disclaimer FORWARD-LOOKING STATEMENTS The information in this presentation and the oral statements made in connection therewith include “forward -looking statements” within the meaning of Section 27A of the Securities Act and Section 21E of the Securities Exchange Act of 1934, as amended. A ll statements, other than statements

August 17, 2017 EX-2.3

Contribution Agreement, dated as of August 16, 2017, between Riverstone VI Alta Mesa Holdings, L.P. and the Registrant (incorporated by reference to Exhibit 2.3 of the Registrant’s Form 8-K filed with the SEC on August 17, 2017).

Exhibit 2.3 Execution Version CONTRIBUTION AGREEMENT by and between RIVERSTONE VI ALTA MESA HOLDINGS, L.P. and SILVER RUN ACQUISITION CORPORATION II Dated as of August 16, 2017 TABLE OF CONTENTS ARTICLE I DEFINITIONS AND CONSTRUCTION 1 1.1 Definitions 1 1.2 Rules of Construction 8 ARTICLE II CONTRIBUTION AND CLOSING 9 2.1 Contributor’s Contribution and Consideration 9 2.2 Closing 9 2.3 Closing Del

August 17, 2017 EX-2.3

CONTRIBUTION AGREEMENT by and between RIVERSTONE VI ALTA MESA HOLDINGS, L.P. SILVER RUN ACQUISITION CORPORATION II Dated as of August 16, 2017

Exhibit 2.3 Execution Version CONTRIBUTION AGREEMENT by and between RIVERSTONE VI ALTA MESA HOLDINGS, L.P. and SILVER RUN ACQUISITION CORPORATION II Dated as of August 16, 2017 TABLE OF CONTENTS ARTICLE I DEFINITIONS AND CONSTRUCTION 1 1.1 Definitions 1 1.2 Rules of Construction 8 ARTICLE II CONTRIBUTION AND CLOSING 9 2.1 Contributor?s Contribution and Consideration 9 2.2 Closing 9 2.3 Closing Del

August 17, 2017 EX-10.1

Forward Purchase Agreement, dated as of August 16, 2017, between Silver Run Acquisition Corporation II and Riverstone VI SR II Holdings, L.P (incorporated by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-k filed on August 17, 2017).

Exhibit 10.1 Execution Version FORWARD PURCHASE AGREEMENT This Forward Purchase Agreement (this “Agreement”) is entered into as of August 16, 2017, between Silver Run Acquisition Corporation II, a Delaware corporation (the “Company”), and Riverstone VI SR II Holdings, L.P., a Delaware limited partnership (the “Purchaser”). Recitals WHEREAS, the Company was formed for the purpose of effecting a mer

August 17, 2017 EX-2.1

Contribution Agreement, dated as of August 16, 2017, among High Mesa Holdings, LP, High Mesa Holdings GP, LLC, Alta Mesa Holdings, LP, Alta Mesa Holdings GP, LLC, the Registrant and the Contributor Owners party thereto (incorporated by reference to Exhibit 2.1 of the Registrant’s Form 8-K filed with the SEC on August 17, 2017).

Exhibit 2.1 Execution Version CONTRIBUTION AGREEMENT by and among HIGH MESA HOLDINGS, LP HIGH MESA HOLDINGS GP, LLC, ALTA MESA HOLDINGS, LP, ALTA MESA HOLDINGS GP, LLC, SILVER RUN ACQUISITION CORPORATION II, solely for purposes of Section 6.7, Section 10.3 and Section 11.13, the Contributor Owners party hereto, and, also for purposes of Section 6.6(j), Michael E. Ellis Dated as of August 16, 2017

August 17, 2017 EX-99.2

Alta Mesa Holdings, LP August 17, 2017

EX-99.2 7 a17-203032ex99d2.htm EX-99.2 Exhibit 99.2 Alta Mesa Holdings, LP August 17, 2017 C O R P O R A T E P A R T I C I P A N T S James Hackett, Chief Executive Officer, Silver Run II Harlan Chappelle, President and Chief Executive Officer, Alta Mesa Holdings, LP Michael McCabe, Vice President and Chief Financial Officer, Alta Mesa Holdings, LP P R E S E N T A T I O N James Hackett: Hello, ever

August 17, 2017 EX-99.2

Alta Mesa Holdings, LP August 17, 2017

Exhibit 99.2 Alta Mesa Holdings, LP August 17, 2017 C O R P O R A T E P A R T I C I P A N T S James Hackett, Chief Executive Officer, Silver Run II Harlan Chappelle, President and Chief Executive Officer, Alta Mesa Holdings, LP Michael McCabe, Vice President and Chief Financial Officer, Alta Mesa Holdings, LP P R E S E N T A T I O N James Hackett: Hello, everyone. I?m Jim Hackett. Hal Chappelle an

August 16, 2017 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 16, 2017 SILVER RUN ACQUIS

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 16, 2017 SILVER RUN ACQUISITION CORPORATION II (Exact name of registrant as specified in its charter) Delaware 001-38040 81-4433840 (State or other jurisdiction of incorporatio

August 16, 2017 EX-99.1

Silver Run Acquisition Corporation II to Merge with Alta Mesa and Kingfisher Midstream to Form a Combined Company Valued at Approximately $3.8 Billion

Exhibit 99.1 FOR IMMEDIATE RELEASE Silver Run Acquisition Corporation II to Merge with Alta Mesa and Kingfisher Midstream to Form a Combined Company Valued at Approximately $3.8 Billion HOUSTON, TX, August 16, 2017 — Silver Run Acquisition Corporation II (“Silver Run II”) (NASDAQ: SRUN, SRUNU, SRUNW) today announced that, subject to certain conditions, it has entered into definitive agreements to

August 16, 2017 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 16, 2017 SILVER RUN ACQUISITION CORPORATION II (Exact name of registrant as specified in its charter) Delaware 001-38040 81-4433840 (State or other jurisdiction of incorporatio

August 16, 2017 EX-99.1

Silver Run Acquisition Corporation II to Merge with Alta Mesa and Kingfisher Midstream to Form a Combined Company Valued at Approximately $3.8 Billion

Exhibit 99.1 FOR IMMEDIATE RELEASE Silver Run Acquisition Corporation II to Merge with Alta Mesa and Kingfisher Midstream to Form a Combined Company Valued at Approximately $3.8 Billion HOUSTON, TX, August 16, 2017 — Silver Run Acquisition Corporation II (“Silver Run II”) (NASDAQ: SRUN, SRUNU, SRUNW) today announced that, subject to certain conditions, it has entered into definitive agreements to

August 11, 2017 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2017 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-38040 Silv

May 10, 2017 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2017 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-38040 Sil

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