CRZO / Carrizo Oil & Gas, Inc. - SEC-arkivering, Årsberetning, Fuldmagtserklæring

Carrizo Oil & Gas, Inc.
US ˙ NASDAQ ˙ US1445771033
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LEI 6X88M1NLGKDIRGWMPT94
CIK 1040593
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 Carrizo Oil & Gas, Inc.
SEC Filings (Chronological Order)
Denne side giver en komplet, kronologisk liste over SEC-arkiveringer, eksklusive ejerskabsregistreringer, som vi leverer andre steder.
December 30, 2019 15-15D

CRZO / Carrizo Oil & Gas, Inc. 15-15D - - 15-15D

15-15D 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 Numbers: 333-198459 333-198459 CARRIZO OIL & GAS, INC.* (Exact name of regist

December 30, 2019 15-12G

CRZO / Carrizo Oil & Gas, Inc. 15-12G - - 15-12G

15-12G 1 d843560d1512g.htm 15-12G 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: 000-29187-87 CARRIZO OIL & GAS, INC.* (Exa

December 20, 2019 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, 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): December 20, 2019 Carrizo Oil & Gas, Inc. (Exact name of registrant as specified in its charter) Texas 000-29187-87 76-0415919 (State or other jurisdiction of incorporation) (Commissi

December 20, 2019 SC 13D/A

CRZO / Carrizo Oil & Gas, Inc. / Magnetar Financial LLC - SC 13D/A Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 1)* Carrizo Oil & Gas, Inc. (Name of Issuer) Common Stock, par value $0.01 (Title of Class of Securities) 144577103 (CUSIP Number of Class of Securities) Alec N. Litowitz Magnetar Capital LLC 1603 Orrington Ave. Evanston, Illinois 60201 (847) 905-4400 (Name,

December 20, 2019 S-8 POS

CRZO / Carrizo Oil & Gas, Inc. S-8 POS - - S-8 POS

S-8 POS As filed with the Securities and Exchange Commission on December 20, 2019 Registration No.

December 20, 2019 POS AM

CRZO / Carrizo Oil & Gas, Inc. POS AM - - POS AM

POS AM As filed with the Securities and Exchange Commission on December 20, 2019 Registration No.

December 20, 2019 S-8 POS

CRZO / Carrizo Oil & Gas, Inc. S-8 POS - - S-8 POS

S-8 POS 1 d837600ds8pos.htm S-8 POS As filed with the Securities and Exchange Commission on December 20, 2019 Registration No. 333-35245 Registration No. 333-55838 Registration No. 333-116528 Registration No. 333-137273 Registration No. 333-162888 Registration No. 333-181585 Registration No. 333-196252 Registration No. 333-218036 Registration No. 333-231546 UNITED STATES SECURITIES AND EXCHANGE CO

December 20, 2019 S-8 POS

CRZO / Carrizo Oil & Gas, Inc. S-8 POS - - S-8 POS

S-8 POS As filed with the Securities and Exchange Commission on December 20, 2019 Registration No.

December 20, 2019 S-8 POS

CRZO / Carrizo Oil & Gas, Inc. S-8 POS - - S-8 POS

S-8 POS As filed with the Securities and Exchange Commission on December 20, 2019 Registration No.

December 20, 2019 S-8 POS

CRZO / Carrizo Oil & Gas, Inc. S-8 POS - - S-8 POS

S-8 POS As filed with the Securities and Exchange Commission on December 20, 2019 Registration No.

December 20, 2019 S-8 POS

CRZO / Carrizo Oil & Gas, Inc. S-8 POS - - S-8 POS

S-8 POS As filed with the Securities and Exchange Commission on December 20, 2019 Registration No.

December 20, 2019 S-8 POS

CRZO / Carrizo Oil & Gas, Inc. S-8 POS - - S-8 POS

S-8 POS As filed with the Securities and Exchange Commission on December 20, 2019 Registration No.

December 20, 2019 425

CPE / Callon Petroleum Co. 425 - Merger Prospectus - 425 - 12.20.2019 - PRESS RELEASE

Filed by: Callon Petroleum Company Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a-12 under the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc.

December 20, 2019 S-8 POS

CRZO / Carrizo Oil & Gas, Inc. S-8 POS - - S-8 POS

S-8 POS 1 d837600ds8pos.htm S-8 POS As filed with the Securities and Exchange Commission on December 20, 2019 Registration No. 333-35245 Registration No. 333-55838 Registration No. 333-116528 Registration No. 333-137273 Registration No. 333-162888 Registration No. 333-181585 Registration No. 333-196252 Registration No. 333-218036 Registration No. 333-231546 UNITED STATES SECURITIES AND EXCHANGE CO

December 20, 2019 POSASR

CRZO / Carrizo Oil & Gas, Inc. POSASR - - POSASR

POSASR As filed with the Securities and Exchange Commission on December 20, 2019 Registration No.

December 20, 2019 EX-99.1

Callon and Carrizo Shareholders Approve Merger

EX-99.1 Exhibit 99.1 Callon and Carrizo Shareholders Approve Merger HOUSTON, Dec. 20, 2019 – Callon Petroleum Company (NYSE: CPE) (“Callon”) and Carrizo Oil & Gas, Inc. (NASDAQ: CRZO) (“Carrizo”) today announced that both companies’ common shareholders voted to approve all proposals necessary for the parties’ pending all-stock transaction at today’s respective special meetings held by each company

December 20, 2019 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, Termination of a Material Definitive Agreement, Material Modification to Rights of Security Holders, Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing, Financial Statements and Exhibits, Completion of Acquisition or Disposition of Assets, 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): December 20, 2019 CARRIZO OIL & GAS, INC.* (Exact name of registrant as specified in its charter) Delaware 001-14039 64-0844345 (State or other jurisdiction of incorporation) (Commiss

December 20, 2019 S-8 POS

CRZO / Carrizo Oil & Gas, Inc. S-8 POS - - S-8 POS

S-8 POS As filed with the Securities and Exchange Commission on December 20, 2019 Registration No.

December 20, 2019 POSASR

CRZO / Carrizo Oil & Gas, Inc. POSASR - - POSASR

POSASR As filed with the Securities and Exchange Commission on December 20, 2019 Registration No.

December 16, 2019 425

CPE / Callon Petroleum Co. 425 - Merger Prospectus - 425 - 12.16.2019 - COMMUNICATION

Filed by: Callon Petroleum Company Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a-12 under the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc.

December 5, 2019 425

CRZO / Carrizo Oil & Gas, Inc. 425 - Merger Prospectus - 425

425 Filed by: Carrizo Oil & Gas, Inc. (Commission File No.: 000-29187-87) Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a-6 of the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc. Form S-4 File No.: 333-233366 On or about December 5, 2019, the following letter was delivered to certain Carrizo Oil & Gas, Inc. shareholders: CARRIZO OIL &

November 20, 2019 425

CPE / Callon Petroleum Co. 425 - Merger Prospectus - 425 - 11.20.2019 - PRESS RELEASE

Filed by: Callon Petroleum Company Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a-12 under the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc.

November 20, 2019 425

CRZO / Carrizo Oil & Gas, Inc. 425 - Merger Prospectus - 425

425 Filed by: Carrizo Oil & Gas, Inc. (Commission File No.: 000-29187-87) Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a-6 of the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc. Form S-4 File No.: 333-233366 On November 20, 2019, Callon Petroleum Company and Carrizo Oil & Gas, Inc. issued the following press release: ISS RECOMMENDS C

November 19, 2019 425

CPE / Callon Petroleum Co. 425 - Merger Prospectus - 425 - 11.18.2019 - PRESENTATION

a42511182019presentation Filed by: Callon Petroleum Company Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a‐12 under the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc.

November 18, 2019 425

CRZO / Carrizo Oil & Gas, Inc. 425 - Merger Prospectus - 425

425 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 14, 2019 Carrizo Oil & Gas, Inc. (Exact name of registrant as specified in its charter) Texas 000-29187-87 76-0415919 (State or other jurisdiction of incorporation) (Comm

November 18, 2019 DEFA14A

CRZO / Carrizo Oil & Gas, Inc. DEFA14A - - DEFA14A

DEFA14A 1 d50088ddefa14a.htm DEFA14A 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

November 18, 2019 EX-99.2

MERGER PROPOSED—YOUR VOTE IS VERY IMPORTANT SUPPLEMENT DATED NOVEMBER 18, 2019 (To Joint Proxy Statement/Prospectus dated October 9, 2019)

EX-99.2 Exhibit 99.2 MERGER PROPOSED—YOUR VOTE IS VERY IMPORTANT SUPPLEMENT DATED NOVEMBER 18, 2019 (To Joint Proxy Statement/Prospectus dated October 9, 2019) Dear Shareholders of Callon Petroleum Company and Carrizo Oil & Gas, Inc.: On or about October 11, 2019, Callon Petroleum Company, a Delaware corporation (“Callon”), and Carrizo Oil & Gas, Inc., a Texas corporation (“Carrizo”), mailed to yo

November 18, 2019 EX-99.4

CONSENT OF RBC CAPITAL MARKETS, LLC

EX-99.4 Exhibit 99.4 CONSENT OF RBC CAPITAL MARKETS, LLC The Board of Directors Carrizo Oil & Gas, Inc. 500 Dallas Street, Suite 2300 Houston, Texas 77002 The Board of Directors: We understand that Carrizo Oil & Gas, Inc. (the “Company”) has determined to include our opinion letter (the “Opinion”), dated November 13, 2019 to the Board of Directors of the Company in the supplement to the joint prox

November 18, 2019 EX-99.1

CARRIZO AND CALLON ANNOUNCE RECORD DATES FOR RECONVENED SPECIAL MEETINGS TO APPROVE MERGER AGREEMENT

EX-99.1 Exhibit 99.1 CARRIZO AND CALLON ANNOUNCE RECORD DATES FOR RECONVENED SPECIAL MEETINGS TO APPROVE MERGER AGREEMENT HOUSTON, November 18, 2019 – Carrizo Oil & Gas, Inc. (NASDAQ: CRZO) and Callon Petroleum Company (NYSE: CPE) today made announcements regarding the record dates for their respective reconvened special meetings of shareholders to consider and vote on matters relating to the Agre

November 18, 2019 EX-99.5

CONSENT OF LAZARD FRÈRES & CO. LLC

EX-99.5 Exhibit 99.5 CONSENT OF LAZARD FRÈRES & CO. LLC The Board of Directors Carrizo Oil & Gas, Inc. 500 Dallas Street, Suite 3200 Houston, Texas 77002 Dear Members of the Board of Directors: We hereby consent to the inclusion of our opinion letter, dated November 13, 2019, to the Board of Directors of Carrizo Oil & Gas, Inc. (“Carrizo”) as Annex D to, and the reference to such opinion letter un

November 18, 2019 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): November 14, 2019 Carrizo Oil & Gas, Inc. (Exact name of registrant as specified in its charter) Texas 000-29187-87 76-0415919 (State or other jurisdiction of incorporation) (Commissi

November 18, 2019 EX-99.3

CONSENT OF J.P. MORGAN SECURITIES LLC

EX-99.3 Exhibit 99.3 CONSENT OF J.P. MORGAN SECURITIES LLC We hereby consent to (i) the use of our opinion letter dated November 13, 2019 to the Board of Directors of Callon Petroleum Company (the “Company”) included in Annex B to the supplement to the joint proxy statement/prospectus that forms a part of the Registration Statement on Form S-4 (as amended, the “Registration Statement”) relating to

November 18, 2019 425

CPE / Callon Petroleum Co. 425 - Merger Prospectus - 425

425 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 14, 2019 Callon Petroleum Company (Exact name of registrant as specified in its charter) Delaware 001-14039 64-0844345 (State or other jurisdiction of incorporation) (Com

November 14, 2019 425

CRZO / Carrizo Oil & Gas, Inc. 425 - Merger Prospectus - 425

425 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, 2019 Carrizo Oil & Gas, Inc. (Exact name of registrant as specified in its charter) Texas 000-29187-87 76-0415919 (State or other jurisdiction of incorporation) (Comm

November 14, 2019 EX-2.1

Amendment No. 2 to Agreement and Plan of Merger, dated as of November 13, 2019, by and between Callon Petroleum Company and Carrizo Oil & Gas, Inc. (incorporated herein by reference to Exhibit 2.1 to Carrizo’s Current Report on Form 8-K filed on November 14, 2019).

EX-2.1 Exhibit 2.1 AMENDMENT NO. 2 TO THE AGREEMENT AND PLAN OF MERGER THIS AMENDMENT NO. 2 TO THE AGREEMENT AND PLAN OF MERGER, dated as of November 13, 2019 (this “Amendment”), is by and between Callon Petroleum Company, a Delaware corporation (“Callon”), and Carrizo Oil & Gas, Inc., a Texas corporation (“Carrizo”). Callon and Carrizo are each sometimes referred to herein as a “Party” and collec

November 14, 2019 EX-99.1

CALLON AND CARRIZO ANNOUNCE AMENDED MERGER AGREEMENT REAFFIRM THE VALUE-CREATION OPPORTUNITY FOR SHAREHOLDERS OF BOTH COMPANIES REITERATE STRATEGIC AND FINANCIAL BENEFITS OF THE COMBINED COMPANY INCLUDING SELF-FUNDED, SCALED DEVELOPMENT OF THE PERMIA

EX-99.1 Exhibit 99.1 CALLON AND CARRIZO ANNOUNCE AMENDED MERGER AGREEMENT REAFFIRM THE VALUE-CREATION OPPORTUNITY FOR SHAREHOLDERS OF BOTH COMPANIES REITERATE STRATEGIC AND FINANCIAL BENEFITS OF THE COMBINED COMPANY INCLUDING SELF-FUNDED, SCALED DEVELOPMENT OF THE PERMIAN BASIN AT LOW COST OF SUPPLY INTEND TO ADJOURN SPECIAL MEETINGS OF SHAREHOLDERS TO DECEMBER 20th HOUSTON, November 14, 2019 – Ca

November 14, 2019 8-K

Regulation FD Disclosure, 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): November 13, 2019 Carrizo Oil & Gas, Inc. (Exact name of registrant as specified in its charter) Texas 000-29187-87 76-0415919 (State or other jurisdiction of incorporation) (Commissi

November 14, 2019 425

CPE / Callon Petroleum Co. 425 - Merger Prospectus - 425

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, 2019 Callon Petroleum Company (Exact name of registrant as specified in its charter) Delaware 001-14039 64-0844345 (State or other jurisdiction of incorporation) (Commiss

November 14, 2019 425

CPE / Callon Petroleum Co. 425 - Merger Prospectus - 425 - 11.14.2019 EMPLOYEE COMMUNICATION

Filed by: Callon Petroleum Company Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a-12 under the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc.

November 14, 2019 425

CRZO / Carrizo Oil & Gas, Inc. 425 - Merger Prospectus - 425

425 Filed by: Carrizo Oil & Gas, Inc. (Commission File No.: 000-29187-87) Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a-6 of the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc. Form S-4 File No.: 333-233366 On November 14, 2019, the President and Chief Executive Officer of Callon Petroleum Company (“Callon”) and the President and Ch

November 5, 2019 425

CRZO / Carrizo Oil & Gas, Inc. 425 - Merger Prospectus - 425

425 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 5, 2019 Carrizo Oil & Gas, Inc. (Exact name of registrant as specified in its charter) Texas 000-29187-87 76-0415919 (State or other jurisdiction of incorporation) (Commi

November 5, 2019 425

CPE / Callon Petroleum Co. 425 - Merger Prospectus - 425

425 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 5, 2019 Callon Petroleum Company (Exact name of registrant as specified in its charter) Delaware 001-14039 64-0844345 (State or other jurisdiction of incorporation) (Comm

November 5, 2019 8-K

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): November 5, 2019 Carrizo Oil & Gas, Inc. (Exact name of registrant as specified in its charter) Texas 000-29187-87 76-0415919 (State or other jurisdiction of incorporation) (Commissio

November 5, 2019 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 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 ☐ TRANSITION REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 000-29187-87 CARRIZO OIL & GAS, INC

November 5, 2019 425

CPE / Callon Petroleum Co. 425 - Merger Prospectus - 425 - 11.05.2019 TRANSCRIPT

Filed by: Callon Petroleum Company Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a-12 under the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc.

November 4, 2019 425

CRZO / Carrizo Oil & Gas, Inc. 425 - Merger Prospectus - 425

425 Filed by: Carrizo Oil & Gas, Inc. (Commission File No.: 000-29187-87) Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a-6 of the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc. Form S-4 File No.: 333-233366 On November 4, 2019, the President and Chief Executive Officer of Callon Petroleum Company (“Callon”) and the President and Chi

November 4, 2019 425

CPE / Callon Petroleum Co. 425 - Merger Prospectus - 425 - 11.04.2019 EMPLOYEE COMMUNICATION

425 1 a425-11042019employeecommu.htm 425 - 11.04.2019 EMPLOYEE COMMUNICATION Filed by: Callon Petroleum Company Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a-12 under the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc. Commission File No.: 000-29187-87 On November 4, 2019, the President and Chief Executive Officer of Callon Petroleu

November 4, 2019 425

CPE / Callon Petroleum Co. 425 - Merger Prospectus - 425 - 11.04.2019 3Q19 EARNINGS PRESENTATION

a425110420193q19earnings Filed by: Callon Petroleum Company Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a‐12 under the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc.

November 4, 2019 425

CPE / Callon Petroleum Co. 425 - Merger Prospectus - 425 - 11.04.2019 3Q19 EARNINGS RELEASE

425 1 a425-110420193q19earningsr.htm 425 - 11.04.2019 3Q19 EARNINGS RELEASE Filed by: Callon Petroleum Company Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a-12 under the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc. Commission File No.: 000-29187-87 Set forth below is a copy of the press release relating to Callon Petroleum Compan

November 4, 2019 425

CRZO / Carrizo Oil & Gas, Inc. 425 - Merger Prospectus - 425

425 Filed by: Carrizo Oil & Gas, Inc. (Commission File No.: 000-29187-87) Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a-6 of the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc. Form S-4 File No.: 333-233366 On November 4, 2019, Carrizo Oil & Gas, Inc. issued the following press release announcing its financial results for the third

November 4, 2019 EX-99.1

(Financial Highlights to Follow)

EX-99.1 Exhibit 99.1 CARRIZO OIL & GAS, INC. News PRESS RELEASE Contact: Jeffrey P. Hayden, CFA, VP - Financial Planning and Analysis (713) 328-1044 Kim Pinyopusarerk, Manager - Investor Relations (713) 358-6430 CARRIZO OIL & GAS ANNOUNCES THIRD QUARTER RESULTS HOUSTON, November 4, 2019 - Carrizo Oil & Gas, Inc. (Nasdaq: CRZO) today announced the Company’s financial results for the third quarter o

November 4, 2019 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): November 4, 2019 CARRIZO OIL & GAS, INC. (Exact name of registrant as specified in its charter) Texas 000-29187-87 76-0415919 (State or other jurisdiction of incorporation) (Commissio

November 4, 2019 425

CPE / Callon Petroleum Co. 425 - Merger Prospectus - 425 - 11.04.2019 PRESS RELEASE

Filed by: Callon Petroleum Company Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a-12 under the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc.

November 1, 2019 425

CRZO / Carrizo Oil & Gas, Inc. 425 - Merger Prospectus - 425

425 1 d827574d425.htm 425 Filed by: Carrizo Oil & Gas, Inc. (Commission File No.: 000-29187-87) Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a-6 of the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc. Form S-4 File No.: 333-233366 On or about November 1, 2019, the following letter was delivered to certain Carrizo Oil & Gas, Inc. share

October 31, 2019 425

CPE / Callon Petroleum Co. 425 - Merger Prospectus - 425 - 10.31.2019 SHAREHOLDER LETTER

425 1 a425-10312019xshareholderl.htm 425 - 10.31.2019 SHAREHOLDER LETTER Filed by: Callon Petroleum Company Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a-12 under the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc. Commission File No.: 000-29187-87 On or about October 31, 2019, the following letter was delivered to certain Callon Pe

October 29, 2019 SC 13D/A

CRZO / Carrizo Oil & Gas, Inc. / Lion Point Capital, LP Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D (Rule 13d-101) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO § 240.13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO § 240.13d-2(a) (Amendment No. 1)1 Carrizo Oil & Gas, Inc. (Name of Issuer) Common Stock, $0.01 par value (Title of Class of Securities) 144577103 (CUSIP Number) ANDREW FREEDMAN, ESQ. OL

October 28, 2019 425

CPE / Callon Petroleum Co. 425 - Merger Prospectus - 425 - 10.28.2019 - PRESENTATION

425 1 a42510282019presentation.htm 425 - 10.28.2019 - PRESENTATION Filed by: Callon Petroleum Company Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a‐12 under the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc. Commission File No.: 000‐29187‐87 On October 28, 2019, Callon Petroleum Company (“Callon”) posted an update to the October 22

October 25, 2019 425

CPE / Callon Petroleum Co. 425 - Merger Prospectus - 425 - 10.24.2019 SHAREHOLDER LETTER

Filed by: Callon Petroleum Company Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a-12 under the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc.

October 23, 2019 425

CPE / Callon Petroleum Co. 425 - Merger Prospectus - 425 - 10.23.2019 PRESS RELEASE

425 1 a425-10232019pressrelease.htm 425 - 10.23.2019 PRESS RELEASE Filed by: Callon Petroleum Company Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a-12 under the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc. Commission File No.: 000-29187-87 On October 23, 2019, Callon Petroleum Company (“Callon”) issued the following press release

October 22, 2019 425

CPE / Callon Petroleum Co. 425 - Merger Prospectus - 425 - 10.22.2019 PRESS RELEASE

Filed by: Callon Petroleum Company Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a-12 under the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc.

October 22, 2019 425

CPE / Callon Petroleum Co. 425 - Merger Prospectus - 425 - 10.22.2019 PRESENTATION

a42510222019presentation Filed by: Callon Petroleum Company Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a-12 under the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc.

October 21, 2019 425

CPE / Callon Petroleum Co. 425 - Merger Prospectus - 425 - 10.21.2019 OPERATIONAL UPDATE

Filed by: Callon Petroleum Company Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a-12 under the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc.

October 15, 2019 425

CPE / Callon Petroleum Co. 425 - Merger Prospectus - 425 - 10.14.2019 COMMUNICATIONS

Filed by: Callon Petroleum Company Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a-12 under the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc.

October 15, 2019 425

CRZO / Carrizo Oil & Gas, Inc. 425 - Merger Prospectus - 425

425 Filed by: Carrizo Oil & Gas, Inc. (Commission File No.: 000-29187-87) Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a-6 of the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc. Form S-4 File No.: 333-233366 On October 14, 2019, the President and Chief Executive Officer of Callon Petroleum Company (“Callon”) and the President and Chi

October 10, 2019 425

CPE / Callon Petroleum Co. 425 - Merger Prospectus - 425 - 10.10.2019 PRESS RELEASE

Filed by: Callon Petroleum Company Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a-12 under the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc.

October 9, 2019 DEFM14A

Amendment No. 1 to Agreement and Plan of Merger, dated as of August 19, 2019, by and between Callon Petroleum Company and Carrizo Oil & Gas, Inc. (incorporated herein by reference to Annex A of Carrizo’s definitive proxy statement filed on October 9, 2019).

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

October 4, 2019 425

CRZO / Carrizo Oil & Gas, Inc. 425 - Merger Prospectus - 425

425 Filed by: Carrizo Oil & Gas, Inc. (Commission File No.: 000-29187-87) Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a-12 of the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc. Form S-4 File No.: 333-233366 On October 3, 2019, the President and Chief Executive Officer of Callon Petroleum Company (“Callon”) distributed the following

October 3, 2019 425

CPE / Callon Petroleum Co. 425 - Merger Prospectus - 425 - 10.03.2019 COMMUNICATIONS CARRIZO

Filed by: Callon Petroleum Company Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a-12 under the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc.

October 3, 2019 425

CPE / Callon Petroleum Co. 425 - Merger Prospectus - 425 - 10.03.2019 COMMUNICATIONS

Filed by: Callon Petroleum Company Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a-12 under the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc.

September 26, 2019 425

CPE / Callon Petroleum Co. 425 - Merger Prospectus - 425 - 09.26.2019 COMMUNICATION

Filed by: Callon Petroleum Company Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a-12 under the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc.

September 26, 2019 425

CPE / Callon Petroleum Co. 425 - Merger Prospectus - 425 - 09.26.2019 PRESS RELEASE

Filed by: Callon Petroleum Company Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a-12 under the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc.

September 26, 2019 425

CPE / Callon Petroleum Co. 425 - Merger Prospectus - 425 - 09.26.2019 KEY THEMES

keythemesvf Filed by: Callon Petroleum Company Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a‐12 under the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc.

September 26, 2019 425

CRZO / Carrizo Oil & Gas, Inc. 425 - Merger Prospectus - 425

425 Filed by: Carrizo Oil & Gas, Inc. (Commission File No.: 000-29187-87) Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a-12 of the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc. Form S-4 File No.: 333-233366 On September 26, 2019, the President and Chief Executive Officer of Callon Petroleum Company (“Callon”) distributed the follow

September 9, 2019 425

CPE / Callon Petroleum Co. 425 - Merger Prospectus - 425 - 09.09.2019 PRESS RELEASE

Filed by: Callon Petroleum Company Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a-12 under the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc.

September 5, 2019 425

CRZO / Carrizo Oil & Gas, Inc. 425 - Merger Prospectus - 425

425 Filed by: Carrizo Oil & Gas, Inc. (Commission File No.: 000-29187-87) Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a-12 of the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc. Form S-4 File No.: 333-233366 On September 5, 2019, the President and Chief Executive Officer of Callon Petroleum Company (“Callon”) and the President and C

September 5, 2019 425

CPE / Callon Petroleum Co. 425 - Merger Prospectus - 425 - SEPTEMBER 5, 2019 COMMUNICATIONS

Filed by: Callon Petroleum Company Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a-12 under the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc.

September 4, 2019 425

CPE / Callon Petroleum Co. 425 - Merger Prospectus - 425 - SEPTEMBER 4, 2019 TRANSCRIPT

Filed by: Callon Petroleum Company Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a-12 under the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc.

September 4, 2019 425

CPE / Callon Petroleum Co. 425 - Merger Prospectus - 425 - SEPTEMBER 4, 2019 INVESTOR PRESENTATION

a42509042019investorpres Filed by: Callon Petroleum Company Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a‐12 under the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc.

August 22, 2019 425

CPE / Callon Petroleum Co. 425 - Merger Prospectus - 425 - AUGUST 22, 2019 COMMUNICATIONS

Filed by: Callon Petroleum Company Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a-12 under the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc.

August 8, 2019 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 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 ☐ TRANSITION REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 000-29187-87 CARRIZO OIL & GAS, INC. (Ex

August 8, 2019 EX-10.1

Form of Employee Restricted Stock Unit Agreement under the 2017 Incentive Plan.

Exhibit 10.1 2017 INCENTIVE PLAN OF CARRIZO OIL & GAS, INC. EMPLOYEE RESTRICTED STOCK UNIT AWARD AGREEMENT This Employee Restricted Stock Unit Award Agreement (“Agreement”) is effective as of , 2019 (the “Grant Date”), by and between Carrizo Oil & Gas, Inc., a Texas corporation (the “Company”), and (the “Grantee”). The Company has adopted the 2017 Incentive Plan of Carrizo Oil & Gas, Inc., as amen

August 7, 2019 425

CPE / Callon Petroleum Co. 425 - Merger Prospectus - 425 - 8-07-19 EARNINGS CALL TRANSCRIPT

Filed by: Callon Petroleum Company Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a-12 under the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc.

August 7, 2019 425

CRZO / Carrizo Oil & Gas, Inc. 425 - Merger Prospectus - 425

Filed by: Carrizo Oil & Gas, Inc. (Commission File No.: 000-29187-87) Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a-12 of the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc. On August 7, 2019, Carrizo Oil & Gas, Inc. issued the following press release announcing its financial results for the second quarter of 2019: CARRIZO OIL & GAS

August 7, 2019 EX-99.1

(Financial Highlights to Follow)

EX-99.1 Exhibit 99.1 CARRIZO OIL & GAS, INC. News PRESS RELEASE Contact: Jeffrey P. Hayden, CFA, VP - Financial Planning and Analysis (713) 328-1044 Kim Pinyopusarerk, Manager - Investor Relations (713) 358-6430 CARRIZO OIL & GAS ANNOUNCES SECOND QUARTER RESULTS HOUSTON, August 7, 2019—Carrizo Oil & Gas, Inc. (Nasdaq: CRZO) today announced the Company’s financial results for the second quarter of

August 7, 2019 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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 7, 2019 Carrizo Oil & Gas, Inc. (Exact name of registrant as specified in its charter) Texas 000-29187-87 76-0415919 (State or other jurisdiction of incorporation) (Commiss

August 6, 2019 425

CPE / Callon Petroleum Co. 425 - Merger Prospectus - 425

425 Filed by: Callon Petroleum Company Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a-12 under the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc.

August 6, 2019 425

CPE / Callon Petroleum Co. 425 - Merger Prospectus - 425

a425 Filed by: Callon Petroleum Company Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a-12 under the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc.

August 6, 2019 425

CRZO / Carrizo Oil & Gas, Inc. 425 - Merger Prospectus - 425

425 1 d783081d425.htm 425 Filed by: Carrizo Oil & Gas, Inc. (Commission File No.: 000-29187-87) Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a-12 of the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc. On August 6, 2019, the President and Chief Executive Officer of Callon Petroleum Company (“Callon”) distributed the following communic

August 5, 2019 EX-99.1

JOINT FILING AGREEMENT

Exhibit 99.1 JOINT FILING AGREEMENT In accordance with Rule 13d-1(k), as promulgated under the Securities Exchange Act of 1934, as amended, the persons named below agree to the joint filing on behalf of each of them a Statement on Schedule 13D (including amendments thereto) with regard to the common stock of Carrizo Oil & Gas, Inc. and further agree that this Joint Filing Agreement be included as

August 5, 2019 SC 13D

CRZO / Carrizo Oil & Gas, Inc. / Magnetar Financial 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. )* Carrizo Oil & Gas, Inc. (Name of Issuer) Common Stock, par value $0.01 (Title of Class of Securities) 144577103 (CUSIP Number of Class of Securities) Alec N. Litowitz Magnetar Capital LLC 1603 Orrington Ave. Evanston, Illinois 60201 (847) 905-4400 (Name,

July 25, 2019 425

CRZO / Carrizo Oil & Gas, Inc. 425 - Merger Prospectus - 425

425 Filed by: Carrizo Oil & Gas, Inc. (Commission File No.: 000-29187-87) Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a-12 of the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc. On July 25, 2019, the President and Chief Executive Officer of Carrizo Oil & Gas, Inc. and the President and Chief Executive Officer of Callon Petroleum Com

July 25, 2019 425

CPE / Callon Petroleum Co. 425 - Merger Prospectus - 425

425 Filed by: Callon Petroleum Company Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a-12 under the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc.

July 15, 2019 425

CRZO / Carrizo Oil & Gas, Inc. 425 - Merger Prospectus - 425

425 Filed by: Carrizo Oil & Gas, Inc. (Commission File No.: 000-29187-87) Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a-12 of the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc. On July 15, 2019, Carrizo Oil & Gas, Inc. (“Carrizo”) e-mailed the following letter from the President and Chief Executive Officer of Callon Petroleum Compa

July 15, 2019 425

CRZO / Carrizo Oil & Gas, Inc. 425 - Merger Prospectus - 425

425 Filed by: Carrizo Oil & Gas, Inc. (Commission File No.: 000-29187-87) Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to 14a-12 of the Securities Exchange Act of 1934 Subject Company: Carrizo Oil & Gas, Inc. The following is a transcript of an investor call held on July 15, 2019 by Callon Petroleum Company (“Callon”) and Carrizo Oil & Gas, Inc. (“Carrizo”). Caut

July 15, 2019 EX-2.1

Agreement and Plan of Merger, dated as of July 14, 2019, by and between Callon and Carrizo

EX-2.1 Exhibit 2.1 Execution Version AGREEMENT AND PLAN OF MERGER by and between CALLON PETROLEUM COMPANY and CARRIZO OIL & GAS, INC. Dated as of July 14, 2019 TABLE OF CONTENTS ARTICLE I. THE MERGER Section 1.1 The Merger 6 Section 1.2 Closing 6 Section 1.3 Effective Time 6 Section 1.4 Effects of the Merger 6 Section 1.5 Organizational Documents of the Surviving Company 6 Section 1.6 Officers 7 S

July 15, 2019 425

CPE / Callon Petroleum Co. 425 - Merger Prospectus - 8-K

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): July 14, 2019 Callon Petroleum Company (Exact name of registrant as specified in its charter) Delaware 001-14039 64-0844345 (State or other jurisdiction of incorporation or organi

July 15, 2019 EX-99.3

Callon Petroleum/Carrizo Oil Merger Moderator: Mark Brewer July 15, 2019 8:30 a.m. EST

EX-99.3 Exhibit 99.3 Callon Petroleum/Carrizo Oil Merger Moderator: Mark Brewer July 15, 2019 8:30 a.m. EST OPERATOR: This is Conference # 2381448. Operator: Good day, ladies and gentlemen and welcome to the Callon and Carrizo joint conference call to discuss Callon’s acquisition of Carrizo. At this time all participants are in listen-only mode. Later we will conduct a question-and-answer session

July 15, 2019 EX-99.4

Dear Callon Team,

EX-99.4 Exhibit 99.4 Dear Callon Team, I am excited to share with you that we announced this morning that Callon has entered into an agreement to acquire Carrizo Oil and Gas. This exciting transaction will create a premier oil and gas company with core oil-weighted assets in both the Permian Basin and Eagle Ford Shale. I encourage you to read more about the combination in the news release availabl

July 15, 2019 EX-99.2

Important Disclosures (continued) These forward-looking statements involve significant risks and uncertainties that could cause actual results to differ materially from those anticipated, including, but not limited to, failure to obtain the required

EX-99.2 CALLON ACQUISITION OF CARRIZO July 15, 2019 Exhibit 99.2 Important Disclosures No Offer or Solicitation Communications in this presentation do not constitute an offer to sell or the solicitation of an offer to buy any securities or a solicitation of any vote or approval with respect to the proposed transaction or otherwise, nor shall there be any sale of securities in any jurisdiction in w

July 15, 2019 EX-99.1

Callon to Acquire Carrizo in All-Stock Transaction Creates a Premier Oil-Weighted Mid-Cap with Peer-Leading Capital Efficiency and Cash Margins Materially Increases Scale with Over 100,000 Boe/d of Pro-Forma 1Q19 Production and 200,000 Net Acres in t

EX-99.1 Exhibit 99.1 Callon to Acquire Carrizo in All-Stock Transaction Creates a Premier Oil-Weighted Mid-Cap with Peer-Leading Capital Efficiency and Cash Margins Materially Increases Scale with Over 100,000 Boe/d of Pro-Forma 1Q19 Production and 200,000 Net Acres in the Prolific Permian Basin and Eagle Ford Shale Highly Complementary Delaware Basin Footprint of Over 90,000 Net Acres to Accelera

July 15, 2019 EX-10.1

Form of Voting and Support Agreement, dated as of July 14, 2019, by and between Callon and certain Carrizo shareholders

EX-10.1 Exhibit 10.1 FORM OF VOTING AND SUPPORT AGREEMENT THIS VOTING AND SUPPORT AGREEMENT (“Agreement”) is entered into as of July 14, 2019, by and between Callon Petroleum Company, a Delaware corporation (“Parent”), and the individual signatory hereto (“Shareholder”). RECITALS A. Shareholder is a holder of record and the “beneficial owner” (within the meaning of Rule 13d-3 under the Securities

July 15, 2019 EX-99.5

To our future team members:

EX-99.5 Exhibit 99.5 To our future team members: On behalf of my colleagues at Callon, I am writing to share how excited we are to join forces with Carrizo and to provide an early welcome to the Callon team. I see tremendous value in this transaction and in combining our two organizations. Together, we will be better able to compete in this dynamic space while enhancing shareholder value and achie

July 15, 2019 EX-99.1

Callon to Acquire Carrizo in All-Stock Transaction Creates a Premier Oil-Weighted Mid-Cap with Peer-Leading Capital Efficiency and Cash Margins Materially Increases Scale with Over 100,000 Boe/d of Pro-Forma 1Q19 Production and 200,000 Net Acres in t

EX-99.1 Exhibit 99.1 Callon to Acquire Carrizo in All-Stock Transaction Creates a Premier Oil-Weighted Mid-Cap with Peer-Leading Capital Efficiency and Cash Margins Materially Increases Scale with Over 100,000 Boe/d of Pro-Forma 1Q19 Production and 200,000 Net Acres in the Prolific Permian Basin and Eagle Ford Shale Highly Complementary Delaware Basin Footprint of Over 90,000 Net Acres to Accelera

July 15, 2019 EX-99.3

CARRIZO EMPLOYEE EMAIL From: S.P. Chip Johnson Subject: Merger Announcement Date: July 15, 2019

EX-99.3 Exhibit 99.3 CARRIZO EMPLOYEE EMAIL From: S.P. Chip Johnson Subject: Merger Announcement Date: July 15, 2019 I am pleased to announce today the proposed merger of Carrizo Oil & Gas, Inc. (“Carrizo”) and Callon Petroleum Company (“Callon”), which we believe will create a premier mid-sized E&P company. Carrizo shareholders will own 46% of the combined company, which will be run by Callon’s s

July 15, 2019 8-K

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Results of Operations and Financial Condition

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): July 14, 2019 Carrizo Oil & Gas, Inc. (Exact name of registrant as specified in its charter) Texas 000-29187-87 76-0415919 (State or other jurisdiction of incorporation) (Commissi

July 15, 2019 EX-99.2

Important Disclosures (continued) These forward-looking statements involve significant risks and uncertainties that could cause actual results to differ materially from those anticipated, including, but not limited to, failure to obtain the required

EX-99.2 CALLON ACQUISITION OF CARRIZO July 15, 2019 Exhibit 99.2 Important Disclosures No Offer or Solicitation Communications in this presentation do not constitute an offer to sell or the solicitation of an offer to buy any securities or a solicitation of any vote or approval with respect to the proposed transaction or otherwise, nor shall there be any sale of securities in any jurisdiction in w

July 15, 2019 EX-2.1

Agreement and Plan of Merger by and between Callon Petroleum Company and Carrizo Oil & Gas, Inc., dated as of July 14, 2019.

EX-2.1 Exhibit 2.1 Execution Version AGREEMENT AND PLAN OF MERGER by and between CALLON PETROLEUM COMPANY and CARRIZO OIL & GAS, INC. Dated as of July 14, 2019 TABLE OF CONTENTS ARTICLE I. THE MERGER Section 1.1 The Merger 6 Section 1.2 Closing 6 Section 1.3 Effective Time 6 Section 1.4 Effects of the Merger 6 Section 1.5 Organizational Documents of the Surviving Company 6 Section 1.6 Officers 7 S

July 15, 2019 425

CRZO / Carrizo Oil & Gas, Inc. 425 - Merger Prospectus - 8-K

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): July 14, 2019 Carrizo Oil & Gas, Inc. (Exact name of registrant as specified in its charter) Texas 000-29187-87 76-0415919 (State or other jurisdiction of incorporation) (Commissi

July 15, 2019 EX-99.3

CARRIZO EMPLOYEE EMAIL From: S.P. Chip Johnson Subject: Merger Announcement Date: July 15, 2019

EX-99.3 Exhibit 99.3 CARRIZO EMPLOYEE EMAIL From: S.P. Chip Johnson Subject: Merger Announcement Date: July 15, 2019 I am pleased to announce today the proposed merger of Carrizo Oil & Gas, Inc. (“Carrizo”) and Callon Petroleum Company (“Callon”), which we believe will create a premier mid-sized E&P company. Carrizo shareholders will own 46% of the combined company, which will be run by Callon’s s

July 15, 2019 EX-99.2

Important Disclosures (continued) These forward-looking statements involve significant risks and uncertainties that could cause actual results to differ materially from those anticipated, including, but not limited to, failure to obtain the required

EX-99.2 CALLON ACQUISITION OF CARRIZO July 15, 2019 Exhibit 99.2 Important Disclosures No Offer or Solicitation Communications in this presentation do not constitute an offer to sell or the solicitation of an offer to buy any securities or a solicitation of any vote or approval with respect to the proposed transaction or otherwise, nor shall there be any sale of securities in any jurisdiction in w

July 15, 2019 EX-99.1

Callon to Acquire Carrizo in All-Stock Transaction Creates a Premier Oil-Weighted Mid-Cap with Peer-Leading Capital Efficiency and Cash Margins Materially Increases Scale with Over 100,000 Boe/d of Pro-Forma 1Q19 Production and 200,000 Net Acres in t

EX-99.1 Exhibit 99.1 Callon to Acquire Carrizo in All-Stock Transaction Creates a Premier Oil-Weighted Mid-Cap with Peer-Leading Capital Efficiency and Cash Margins Materially Increases Scale with Over 100,000 Boe/d of Pro-Forma 1Q19 Production and 200,000 Net Acres in the Prolific Permian Basin and Eagle Ford Shale Highly Complementary Delaware Basin Footprint of Over 90,000 Net Acres to Accelera

July 15, 2019 EX-2.1

Agreement and Plan of Merger by and between Callon Petroleum Company and Carrizo Oil & Gas, Inc., dated as of July 14, 2019.

EX-2.1 Exhibit 2.1 Execution Version AGREEMENT AND PLAN OF MERGER by and between CALLON PETROLEUM COMPANY and CARRIZO OIL & GAS, INC. Dated as of July 14, 2019 TABLE OF CONTENTS ARTICLE I. THE MERGER Section 1.1 The Merger 6 Section 1.2 Closing 6 Section 1.3 Effective Time 6 Section 1.4 Effects of the Merger 6 Section 1.5 Organizational Documents of the Surviving Company 6 Section 1.6 Officers 7 S

May 16, 2019 S-8

CRZO / Carrizo Oil & Gas, Inc. S-8 S-8

As filed with the Securities and Exchange Commission on May 16, 2019 Registration No.

May 16, 2019 EX-10.1

2017 Incentive Plan of Carrizo Oil &Gas, Inc.

Exhibit 10.1 2017 INCENTIVE PLAN OF CARRIZO OIL & GAS, INC. (As amended and restated effective May 16, 2019) 1.Plan. This 2017 Incentive Plan of Carrizo Oil & Gas, Inc., as originally established effective May 16, 2017, and amended and restated effective May 16, 2019 (the “Plan”) was adopted by Carrizo Oil & Gas, Inc. to reward certain corporate officers and key employees of Carrizo Oil & Gas, Inc

May 16, 2019 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, 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): May 16, 2019 Carrizo Oil & Gas, Inc. (Exact name of registrant as specified in its charter) Texas 000-29187-87 76-0415919 (State or other jurisdiction of incorporation) (Commission Fi

May 9, 2019 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q þ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2019 o TRANSITION REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 000-29187-87 CARRIZO OIL & GAS, INC. (E

May 7, 2019 EX-99.1

(Financial Highlights to Follow) CARRIZO OIL & GAS, INC. CONSOLIDATED BALANCE SHEETS (In thousands, except share and per share amounts) March 31, 2019 December 31, 2018 Assets Current assets Cash and cash equivalents $2,173 $2,282 Accounts receivable

Exhibit 99.1 CARRIZO OIL & GAS, INC. News PRESS RELEASE Contact: Jeffrey P. Hayden, CFA, VP - Financial Planning and Analysis (713) 328-1044 Kim Pinyopusarerk, Manager - Investor Relations (713) 358-6430 CARRIZO OIL & GAS ANNOUNCES FIRST QUARTER RESULTS HOUSTON, May 7, 2019 - Carrizo Oil & Gas, Inc. (Nasdaq: CRZO) today announced the Company’s financial results for the first quarter of 2019 and pr

May 7, 2019 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 7, 2019 CARRIZO OIL & GAS, INC. (Exact name of registrant as specified in its charter) Texas 000-29187-87 76-0415919 (State or other jurisdiction of incorporation) (Commission Fil

May 6, 2019 EX-99.1

JOINT FILING AGREEMENT

Exhibit 99.1 JOINT FILING AGREEMENT In accordance with Rule 13d-1(k)(1)(iii) under the Securities Exchange Act of 1934, as amended, the persons named below agree to the joint filing on behalf of each of them of a Statement on Schedule 13D (including additional amendments thereto) with respect to the shares of Common Stock, $0.01 par value, of Carrizo Oil & Gas, Inc., a Texas corporation. This Join

May 6, 2019 SC 13D

CRZO / Carrizo Oil & Gas, Inc. / Lion Point Capital, LP - THE SCHEDULE 13D Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D (Rule 13d-101) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO § 240.13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO § 240.13d-2(a) (Amendment No. )1 Carrizo Oil & Gas, Inc. (Name of Issuer) Common Stock, $0.01 par value (Title of Class of Securities) 144577103 (CUSIP Number) ANDREW FREEDMAN, ESQ. OLS

April 2, 2019 DEFA14A

CRZO / Carrizo Oil & Gas, Inc. DEFA14A

DEFA14A 1 d656040ddefa14a.htm DEFA14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 14A Information 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 permi

April 2, 2019 DEF 14A

Proxy Statement

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

March 28, 2019 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): March 27, 2019 CARRIZO OIL & GAS, INC. (Exact name of registrant as specified in its charter) Texas 000-29187-87 76-0415919 (State or other jurisdiction of incorporation) (Commission

March 28, 2019 EX-10.1

Fourteenth Amendment to Credit Agreement, dated as of March 27, 2019, among Carrizo Oil & Gas, Inc., as borrower, Wells Fargo Bank, National Association, as administrative agent, and the lender parties thereto.

EXHIBIT 10.1 FOURTEENTH AMENDMENT TO CREDIT AGREEMENT DATED AS OF MARCH 27, 2019 AMONG CARRIZO OIL & GAS, INC., AS BORROWER, THE GUARANTORS PARTY HERETO, WELLS FARGO BANK, NATIONAL ASSOCIATION, AS ADMINISTRATIVE AGENT, CREDIT AGRICOLE CORPORATE AND INVESTMENT BANK AND ROYAL BANK OF CANADA, AS CO-SYNDICATION AGENTS, COMPASS BANK AND SG AMERICAS SECURITIES, LLC, AS CO-DOCUMENTATION AGENTS AND THE LE

March 1, 2019 EX-99.1

Summary of Reserve Report and Report of Ryder Scott Company, L.P. as of December 31, 2018.

Exhibit 99.1 Carrizo Oil & Gas, Inc. Estimated Future Reserves and Income Attributable to Certain Leasehold Interests SEC Parameters As of December 31, 2018 /s/ Michael F. Stell Michael F. Stell, P.E. TBPE License No. 56416 Advising Senior Vice President [SEAL] RYDER SCOTT COMPANY, L.P. TBPE Firm Registration No. F-1580 RYDER SCOTT COMPANY PETROLEUM CONSULTANTS [Ryder Scott Company L.P. logo] TBPE

March 1, 2019 EX-10.24

Amended and Restated Employment Agreement dated February 14, 2019 between the Company and Brad Fisher

Exhibit 10.24 AMENDED AND RESTATED EMPLOYMENT AGREEMENT This Amended and Restated Employment Agreement (the “Agreement”) is entered into by and between Carrizo Oil & Gas, Inc., a Texas corporation (the “Company”), and J. Bradley Fisher (the “Executive”) to be effective as of February 14, 2019 (the “Agreement Effective Date”), and amends and restates the Employment Agreement between the Parties dat

March 1, 2019 EX-10.23

Amended and Restated Employment Agreement dated February 14, 2019 between the Company and S.P. Johnson IV

Exhibit 10.23 AMENDED AND RESTATED EMPLOYMENT AGREEMENT This Amended and Restated Employment Agreement (the “Agreement”) is entered into by and between Carrizo Oil & Gas, Inc., a Texas corporation (the “Company”), and S.P. Johnson IV (the “Executive”) to be effective as of February 14, 2019 (the “Agreement Effective Date”), and amends and restates the Employment Agreement between the Parties dated

March 1, 2019 10-K

Form 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the Fiscal Year Ended December 31, 2018 Commission File Number 000-29187-87 Carrizo Oil & Gas, Inc. (Exact name of registrant as specified in its charter) Texas 76-0415919 (State or other jurisdiction of incorporation or organiza

March 1, 2019 EX-10.27

Amended and Restated Employment Agreement dated February 14, 2019 between the Company and Richard H. Smith

Exhibit 10.27 AMENDED AND RESTATED EMPLOYMENT AGREEMENT This Amended and Restated Employment Agreement (the “Agreement”) is entered into by and between Carrizo Oil & Gas, Inc., a Texas corporation (the “Company”), and Richard H. Smith (the “Executive”) to be effective as of February 14, 2019 (the “Agreement Effective Date”), and amends and restates the Employment Agreement between the Parties date

March 1, 2019 EX-10.28

Amended and Restated Employment Agreement, dated February 14, 2019, between Carrizo and Gregory F. Conaway (incorporated by reference to Exhibit 10.28 to Carrizo’s Annual Report on Form 10-K for the year ended December 31, 2018, File No. 000-29187-87)

Exhibit 10.28 AMENDED AND RESTATED EMPLOYMENT AGREEMENT This AMENDED AND RESTATED EMPLOYMENT AGREEMENT (the “Agreement”) is entered into by and between Carrizo Oil & Gas, Inc., a Texas corporation (the “Company”), and Gregory F. Conaway (the “Employee”), to be effective as of the 14th day of February 2019 (the “Agreement Effective Date”), and amends and restates the Employment Agreement between th

March 1, 2019 EX-21.1

Subsidiaries of the Company.

Exhibit 21.1 Subsidiaries of the Company The following are wholly owned subsidiaries of Carrizo Oil & Gas, Inc.: Bandelier Pipeline Holding, LLC Carrizo (Eagle Ford) LLC Carrizo (Marcellus) LLC Carrizo (Marcellus) WV LLC Carrizo (Niobrara) LLC Carrizo (Permian) LLC Carrizo (Utica) LLC Carrizo Marcellus Holding Inc. CLLR, Inc. Hondo Pipeline, Inc. Mescalero Pipeline, LLC

March 1, 2019 EX-10.15

Carrizo Oil & Gas, Inc. Change in Control Severance Plan effective February 14, 2019

Exhibit 10.15 CARRIZO OIL & GAS, INC. CHANGE IN CONTROL SEVERANCE PLAN (As Established Effective February 14, 2019) Plan Document and Summary Plan Description The Board of Directors (the “Board”) of Carrizo Oil & Gas, Inc. (the “Company”) recognizes that, as is the case with many publicly held corporations, there exists the possibility of a change in control of the Company. This possibility and th

March 1, 2019 EX-10.16

Form of Employment Agreement of Carrizo Oil & Gas, Inc. as of February 14, 2019.

Exhibit 10.16 CARRIZO OIL & GAS, INC. EMPLOYMENT AGREEMENT This EMPLOYMENT AGREEMENT (the “Agreement”) is entered into by and between Carrizo Oil & Gas, Inc., a Texas corporation (the “Company”), and (the “Employee”), to be effective as of the day of (the “Agreement Effective Date”). The Company has previously adopted, and the Employee is being made a participant in, the Carrizo Oil & Gas, Inc. Ch

March 1, 2019 EX-10.26

Amended and Restated Employment Agreement dated February 14, 2019 between the Company and Gerald A. Morton

Exhibit 10.26 AMENDED AND RESTATED EMPLOYMENT AGREEMENT This Amended and Restated Employment Agreement (the “Agreement”) is entered into by and between Carrizo Oil & Gas, Inc., a Texas corporation (the “Company”), and Gerald A. Morton (the “Executive”) to be effective as of February 14, 2019 (the “Agreement Effective Date”), and amends and restates the Employment Agreement between the Parties date

March 1, 2019 EX-10.25

Amended and Restated Employment Agreement dated February 14, 2019 between the Company and David L. Pitts

Exhibit 10.25 AMENDED AND RESTATED EMPLOYMENT AGREEMENT This Amended and Restated Employment Agreement (the “Agreement”) is entered into by and between Carrizo Oil & Gas, Inc., a Texas corporation (the “Company”), and David L. Pitts (the “Executive”) to be effective as of February 14, 2019 (the “Agreement Effective Date”), and amends and restates the Employment Agreement between the Parties dated

February 25, 2019 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): February 25, 2019 CARRIZO OIL & GAS, INC. (Exact name of registrant as specified in its charter) Texas 000-29187-87 76-0415919 (State or other jurisdiction of incorporation) (Commissi

February 25, 2019 EX-99.1

Crude Oil NGLs Natural Gas Total PV-10 Region (MMBbl) (MMBbl) (Bcf) (MMBoe) ($MM) Eagle Ford Shale 110.9 19.2 114.1 149.1 $2,691.8 Delaware Basin 68.8 49.9 369.0 180.3 1,399.6 Total 179.7 69.1 483.1 329.4 $4,091.4

Exhibit 99.1 CARRIZO OIL & GAS, INC. News PRESS RELEASE Contact: Jeffrey P. Hayden, CFA, VP - Investor Relations (713) 328-1044 Kim Pinyopusarerk, Manager - Investor Relations (713) 358-6430 CARRIZO OIL & GAS ANNOUNCES FOURTH QUARTER AND YEAR-END 2018 RESULTS HOUSTON, February 25, 2019 - Carrizo Oil & Gas, Inc. (Nasdaq: CRZO) today announced the Company’s financial results for the fourth quarter a

February 19, 2019 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

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 13, 2019 CARRIZO OIL & GAS, INC. (Exact name of registrant as specified in its charter) Texas 000-29187-87 76-0415919 (State or other jurisdiction of incorporation) (Comm

February 13, 2019 SC 13G/A

CRZO / Carrizo Oil & Gas, Inc. / Wilks Brothers, LLC - SC 13G/A Passive Investment

SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* Carrizo Oil & Gas, Inc (Name of Issuer) Common Stock, par value $0.01 per share (Title of Class of Securities) 144577103 (CUSIP Number) December 31, 2018 (Date of Event which Requires Filing of this Statement) Check the appropriate box to design

February 11, 2019 SC 13G/A

CRZO / Carrizo Oil & Gas, Inc. / FRONTIER CAPITAL MANAGEMENT CO LLC - SC 13G/A Passive Investment

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. 8) CARRIZO OIL & GAS INC (Name of Issuer) COMMON STOCKS (Title of Class of Securities) 144577103 (CUSIP Number) DECEMBER 31, 2018 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to w

February 11, 2019 SC 13G/A

CRZO / Carrizo Oil & Gas, Inc. / VANGUARD GROUP INC Passive Investment

carrizooilgasinc.htm - Generated by SEC Publisher for SEC Filing SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 7 )* Name of issuer: Carrizo Oil & Gas Inc Title of Class of Securities: Common Stock CUSIP Number: 144577103 Date of Event Which Requires Filing of this Statement: December 31, 2018 Check the appropriate b

December 10, 2018 SC 13G/A

CRZO / Carrizo Oil & Gas, Inc. / VANGUARD GROUP INC Passive Investment

carrizooilgasinc.htm - Generated by SEC Publisher for SEC Filing SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 6 )* Name of issuer: Carrizo Oil & Gas Inc Title of Class of Securities: Common Stock CUSIP Number: 144577103 Date of Event Which Requires Filing of this Statement: November 30, 2018 Check the appropriate b

November 7, 2018 10-Q

CRZO / Carrizo Oil & Gas, Inc. 10-Q (Quarterly Report)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q þ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2018 o TRANSITION REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 000-29187-87 CARRIZO OIL & GAS, INC

November 5, 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): November 5, 2018 CARRIZO OIL & GAS, INC. (Exact name of registrant as specified in its charter) Texas 000-29187-87 76-0415919 (State or other jurisdiction of incorporation) (Commissio

November 5, 2018 EX-99.1

(Financial Highlights to Follow) CARRIZO OIL & GAS, INC. CONSOLIDATED BALANCE SHEETS (In thousands, except share and per share amounts) September 30, 2018 December 31, 2017 Assets Current assets Cash and cash equivalents $2,415 $9,540 Accounts receiv

Exhibit 99.1 CARRIZO OIL & GAS, INC. News PRESS RELEASE Contact: Jeffrey P. Hayden, CFA, VP - Investor Relations (713) 328-1044 Kim Pinyopusarerk, Manager - Investor Relations (713) 358-6430 CARRIZO OIL & GAS ANNOUNCES THIRD QUARTER RESULTS HOUSTON, November 5, 2018 - Carrizo Oil & Gas, Inc. (Nasdaq: CRZO) today announced the Company’s financial results for the third quarter of 2018 and provided a

November 1, 2018 EX-10.1

Thirteenth Amendment to Credit Agreement, dated as of October 29, 2018, among Carrizo Oil & Gas, Inc., as borrower, Wells Fargo Bank, National Association, as administrative agent, and the lender parties thereto.

Exhibit 10.1 THIRTEENTH AMENDMENT TO CREDIT AGREEMENT DATED AS OF OCTOBER 29, 2018 AMONG CARRIZO OIL & GAS, INC., AS BORROWER, THE GUARANTORS PARTY HERETO, WELLS FARGO BANK, NATIONAL ASSOCIATION, AS ADMINISTRATIVE AGENT, CREDIT AGRICOLE CORPORATE AND INVESTMENT BANK AND ROYAL BANK OF CANADA, AS CO-SYNDICATION AGENTS, COMPASS BANK AND SG AMERICAS SECURITIES, LLC, AS CO-DOCUMENTATION AGENTS AND THE

November 1, 2018 8-K

Entry into a Material Definitive Agreement, 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): October 29, 2018 CARRIZO OIL & GAS, INC. (Exact name of registrant as specified in its charter) Texas 000-29187-87 76-0415919 (State or other jurisdiction of incorporation) (Commissio

October 18, 2018 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): October 17, 2018 CARRIZO OIL & GAS, INC. (Exact name of registrant as specified in its charter) Texas 000-29187-87 76-0415919 (State or other jurisdiction of incorporation) (Commissio

October 18, 2018 EX-99.1

CARRIZO OIL & GAS, INC.

EX-99.1 Exhibit 99.1 CARRIZO OIL & GAS, INC. News PRESS RELEASE Contact: Jeffrey P. Hayden, CFA, VP - Investor Relations (713) 328-1044 Kim Pinyopusarerk, Manager - Investor Relations (713) 358-6430 CARRIZO OIL & GAS ANNOUNCES CLOSING OF DEVON ACQUISITION AND CONDITIONAL FULL REDEMPTION OF 7.50% SENIOR NOTES DUE 2020 HOUSTON, October 18, 2018 - Carrizo Oil & Gas, Inc. (Nasdaq: CRZO) today announce

August 16, 2018 EX-1.1

Underwriting Agreement, dated as of August 14, 2018, by and between Carrizo Oil & Gas, Inc. and Citigroup Global Markets Inc. and Goldman Sachs & Co. LLC, as representatives of the Underwriters.

EX-1.1 Exhibit 1.1 9,500,000 Shares Carrizo Oil & Gas, Inc. Common Stock ($0.01 Par Value) UNDERWRITING AGREEMENT August 14, 2018 Citigroup Global Markets Inc. Goldman Sachs & Co. LLC As Representatives of the Several Underwriters c/o Citigroup Global Markets Inc. 388 Greenwich Street New York, New York 10013 c/o Goldman Sachs & Co. LLC 200 West Street New York, New York 10282 Ladies and Gentlemen

August 16, 2018 8-K

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): August 14, 2018 CARRIZO OIL & GAS, INC. (Exact name of registrant as specified in its charter) Texas 000-29187-87 76-0415919 (State or other jurisdiction of incorporation) (Commis

August 16, 2018 424B5

CALCULATION OF REGISTRATION FEE Title of Each Class of Securities to be Registered Amount to be Registered Proposed Maximum Aggregate Offering Price per Share Proposed Maximum Aggregate Offering Price Amount of Registration Fee (1) Common Stock 9,500

424B5 Table of Contents Filed pursuant to Rule 424(b)(5) Registration Statement No.

August 14, 2018 424B5

SUBJECT TO COMPLETION, DATED AUGUST 14, 2018

424B5 Table of Contents Filed Pursuant to Rule 424(b)(5) Registration No. 333-221121 The information in this preliminary prospectus supplement is not complete and may be changed. This preliminary prospectus supplement and the attached prospectus are not an offer to sell nor do they seek an offer to buy these securities in any jurisdiction where the offer or sale is not permitted. SUBJECT TO COMPLE

August 14, 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): August 13, 2018 CARRIZO OIL & GAS, INC. (Exact name of registrant as specified in its charter) Texas 000-29187-87 76-0415919 (State or other jurisdiction of incorporation) (Commis

August 14, 2018 EX-99.1

CARRIZO OIL & GAS, INC.

EX-99.1 Exhibit 99.1 CARRIZO OIL & GAS, INC. News PRESS RELEASE Contact: Jeffrey P. Hayden, CFA, VP—Investor Relations (713) 328-1044 Kim Pinyopusarerk, Manager—Investor Relations (713) 358-6430 CARRIZO OIL & GAS ANNOUNCES DELAWARE BASIN ACQUISITION HOUSTON, August 14, 2018—Carrizo Oil & Gas, Inc. (Nasdaq: CRZO) today announced that it has agreed to acquire Delaware Basin properties from Devon Ene

August 7, 2018 10-Q

CRZO / Carrizo Oil & Gas, Inc. 10-Q (Quarterly Report)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q þ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2018 o TRANSITION REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 000-29187-87 CARRIZO OIL & GAS, INC. (Ex

August 6, 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 6, 2018 CARRIZO OIL & GAS, INC. (Exact name of registrant as specified in its charter) Texas 000-29187-87 76-0415919 (State or other jurisdiction of incorporation) (Commission

August 6, 2018 EX-99.1

(Financial Highlights to Follow) CARRIZO OIL & GAS, INC. CONSOLIDATED BALANCE SHEETS (In thousands, except share and per share amounts) June 30, 2018 December 31, 2017 Assets Current assets Cash and cash equivalents $2,099 $9,540 Accounts receivable,

EX-99.1 2 carrizo2q18pressrelease.htm CARRIZO 2Q'18 PRESS RELEASE Exhibit 99.1 CARRIZO OIL & GAS, INC. News PRESS RELEASE Contact: Jeffrey P. Hayden, CFA, VP - Investor Relations (713) 328-1044 Kim Pinyopusarerk, Manager - Investor Relations (713) 358-6430 CARRIZO OIL & GAS ANNOUNCES SECOND QUARTER RESULTS HOUSTON, August 6, 2018 - Carrizo Oil & Gas, Inc. (Nasdaq: CRZO) today announced the Company

July 10, 2018 SC 13G/A

CRZO / Carrizo Oil & Gas, Inc. / NWQ INVESTMENT MANAGEMENT COMPANY, LLC - CARRIZO OIL & GAS INC Passive Investment

Carrizo Oil & Gas Inc UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.

June 22, 2018 SC 13D/A

CRZO / Carrizo Oil & Gas, Inc. / Kemc Fund Iv Gp, Llc - SC 13D/A Activist Investment

SC 13D/A 1 d538689dsc13da.htm SC 13D/A SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 1)* Carrizo Oil & Gas, Inc. (Name of Issuer) Common Stock, $0.01 Par Value (Title of Class of Securities) 144577103 (CUSIP Number) Benjamin Dell KEMC Fund IV GP, LLC c/o Kimmeridge Energy Management Company, LLC 400 Madison Avenue Ne

May 29, 2018 EX-10.1

Form of Indemnification Agreement for Directors and Executive Officers of the Company, adopted May 23, 2018.

Exhibit 10.1 CARRIZO OIL & GAS, INC. INDEMNIFICATION AGREEMENT This Indemnification Agreement (this “Agreement”) is made and entered into as of the day of , 2018, by and between Carrizo Oil & Gas, Inc., a Texas corporation (the “Corporation”), and (“Indemnitee”), who is a director or executive officer of the Corporation. RECITALS A. Highly competent and experienced persons are reluctant to serve c

May 29, 2018 8-K

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Entry into a Material Definitive Agreement, Financial Statements and Exhibits, 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): May 22, 2018 Carrizo Oil & Gas, Inc. (Exact name of registrant as specified in its charter) Texas 000-29187-87 76-0415919 (State or other jurisdiction of incorporation) (Commission Fi

May 29, 2018 EX-3.1

Amended and Restated Bylaws of Carrizo Oil & Gas, Inc., adopted May 23, 2018 (incorporated herein by reference to Exhibit 3.1 to the Company’s Current Report on Form 8-K filed on May 29, 2018 (File No. 000-29187-87)).

Exhibit 3.1 AMENDED AND RESTATED BYLAWS OF CARRIZO OIL & GAS, INC. The following Amended and Restated Bylaws, adopted by the Board of Directors of Carrizo Oil & Gas, Inc. (the “Corporation”) as of May 23, 2018, shall govern the business of the Corporation, except as the same may be afterwards amended: ARTICLE I CAPITAL STOCK Section 1.1. Certificates Representing Shares. Shares of the capital stoc

May 9, 2018 EX-10.1

Twelfth Amendment to Credit Agreement, dated as of May 4, 2018, among Carrizo Oil & Gas, Inc., as borrower, Wells Fargo Bank, National Association, as administrative agent, and the lender parties thereto.

Exhibit 10.1 TWELFTH AMENDMENT TO CREDIT AGREEMENT DATED AS OF MAY 4, 2018 AMONG CARRIZO OIL & GAS, INC., AS BORROWER, THE GUARANTORS PARTY HERETO, WELLS FARGO BANK, NATIONAL ASSOCIATION, AS ADMINISTRATIVE AGENT, CREDIT AGRICOLE CORPORATE AND INVESTMENT BANK AND ROYAL BANK OF CANADA, AS CO-SYNDICATION AGENTS, COMPASS BANK AND SG AMERICAS SECURITIES, LLC, AS CO-DOCUMENTATION AGENTS AND THE LENDERS

May 9, 2018 10-Q

CRZO / Carrizo Oil & Gas, Inc. 10-Q (Quarterly Report)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q þ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2018 o TRANSITION REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 000-29187-87 CARRIZO OIL & GAS, INC. (E

May 8, 2018 EX-99.1

(Financial Highlights to Follow) CARRIZO OIL & GAS, INC. CONSOLIDATED BALANCE SHEETS (In thousands, except share and per share amounts) March 31, 2018 December 31, 2017 Assets Current assets Cash and cash equivalents $4,885 $9,540 Accounts receivable

Exhibit 99.1 CARRIZO OIL & GAS, INC. News PRESS RELEASE Contact: Jeffrey P. Hayden, CFA, VP - Investor Relations (713) 328-1044 Kim Pinyopusarerk, Manager - Investor Relations (713) 358-6430 CARRIZO OIL & GAS ANNOUNCES FIRST QUARTER RESULTS HOUSTON, May 7, 2018 - Carrizo Oil & Gas, Inc. (Nasdaq: CRZO) today announced the Company’s financial results for the first quarter of 2018 and provided an ope

May 8, 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 7, 2018 CARRIZO OIL & GAS, INC. (Exact name of registrant as specified in its charter) Texas 000-29187-87 76-0415919 (State or other jurisdiction of incorporation) (Commission Fil

April 23, 2018 DEFA14A

CRZO / Carrizo Oil & Gas, Inc. DEFA14A

DEFA14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 14A Information 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)) ☐ De

April 23, 2018 DEF 14A

CRZO / Carrizo Oil & Gas, Inc. DEF 14A

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

April 10, 2018 PRE 14A

CRZO / Carrizo Oil & Gas, Inc. PRE 14A

PRE 14A 1 d485335dpre14a.htm PRE 14A Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 14A Information 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 Commissi

April 6, 2018 8-K

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): April 5, 2018 CARRIZO OIL & GAS, INC. (Exact name of registrant as specified in its charter) Texas 000-29187-87 76-0415919 (State or other jurisdiction of incorporation) (Commission F

April 6, 2018 EX-99.1

(713) 328-1044

Exhibit 99.1 CARRIZO OIL & GAS, INC. News PRESS RELEASE Contact: Jeffrey P. Hayden, CFA, VP - Investor Relations (713) 328-1044 Kim Pinyopusarerk, Manager - Investor Relations (713) 358-6430 CARRIZO OIL & GAS RESPONDS TO KIMMERIDGE 13D FILING HOUSTON, April 5, 2018 - Carrizo Oil & Gas, Inc. (Nasdaq: CRZO) today provided the following statement in response to the public filing of a schedule 13D by

April 5, 2018 SC 13D

CRZO / Carrizo Oil & Gas, Inc. / Kemc Fund Iv Gp, Llc - SC 13D Activist Investment

SC 13D SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 Carrizo Oil & Gas, Inc. (Name of Issuer) Common Stock, $0.01 Par Value (Title of Class of Securities) 144577103 (CUSIP Number) Benjamin Dell KEMC Fund IV GP, LLC c/o Kimmeridge Energy Management Company, LLC 400 Madison Avenue New York, NY 10017 (646) 517-7252 (Name, Address and

March 27, 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

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 23, 2018 CARRIZO OIL & GAS, INC. (Exact name of registrant as specified in its charter) Texas 000-29187-87 76-0415919 (State or other jurisdiction of incorporation) (Commission

March 27, 2018 EX-99.1

(713) 328-1044

Exhibit 99.1 CARRIZO OIL & GAS, INC. News PRESS RELEASE Contact: Jeffrey P. Hayden, CFA, VP - Investor Relations (713) 328-1044 Kim Pinyopusarerk, Manager - Investor Relations (713) 358-6430 CARRIZO OIL & GAS ANNOUNCES APPOINTMENT OF FRANCES ALDRICH SEVILLA-SACASA TO BOARD OF DIRECTORS HOUSTON, March 27, 2018 - Carrizo Oil & Gas, Inc. (Nasdaq: CRZO) today announced the appointment of Ms. Frances A

March 1, 2018 EX-99.1

IDENTIFICATION OF MEMBERS OF THE GROUP

EX-99.1 Exhibit 99.1 IDENTIFICATION OF MEMBERS OF THE GROUP Dan H. Wilks Staci Wilks Wilks Brothers, LLC Page 9 of 10

March 1, 2018 EX-99.2

JOINT FILING AGREEMENT

EX-99.2 Exhibit 99.2 JOINT FILING AGREEMENT In accordance with Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended, the persons named below agree to the joint filing on behalf of each of them of a statement on Schedule 13G (including amendments thereto) with respect to the common stock, par value $0.01 per share, of Carrizo Oil & Gas, Inc., a Texas corporation, and further agree

March 1, 2018 SC 13G

CRZO / Carrizo Oil & Gas, Inc. / Wilks Brothers, LLC - SC 13G Passive Investment

SC 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* Carrizo Oil & Gas, Inc. (Name of Issuer) Common Stock, par value $0.01 per share (Title of Class of Securities) 144577103 (CUSIP Number) February 28, 2018 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designat

February 28, 2018 10-K

CRZO / Carrizo Oil & Gas, Inc. 10-K (Annual Report)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the Fiscal Year Ended December 31, 2017 Commission File Number 000-29187-87 Carrizo Oil & Gas, Inc. (Exact name of registrant as specified in its charter) Texas 76-0415919 (State or other jurisdiction of incorporation or organiza

February 28, 2018 EX-10.19

Form of Employee Restricted Stock Agreement under the 2017 Incentive Plan.

Exhibit 10.19 2017 INCENTIVE PLAN OF CARRIZO OIL & GAS, INC. EMPLOYEE RESTRICTED STOCK AWARD AGREEMENT THIS AGREEMENT (“Agreement”) is effective as of , 20 (the “Grant Date”), by and between Carrizo Oil & Gas, Inc., a Texas corporation (the “Company”), and (the “Grantee”). The Company has adopted the 2017 Incentive Plan of Carrizo Oil & Gas, Inc., as amended and restated effective May 16, 2017 (as

February 28, 2018 EX-10.22

Form of Employee Stock Appreciation Rights Agreement (Officer) under the Carrizo Oil & Gas, Inc. Cash-Settled Stock Appreciation Rights Plan.

Exhibit 10.22 CARRIZO OIL & GAS, INC. CASH-SETTLED STOCK APPRECIATION RIGHTS PLAN EMPLOYEE STOCK APPRECIATION RIGHTS AGREEMENT (Officer) THIS AGREEMENT (“Agreement”) is effective as of , 20 (the “Grant Date”), by and between Carrizo Oil & Gas, Inc., a Texas corporation (the “Company”), and (the “Grantee”). The Company has adopted the Carrizo Oil & Gas, Inc. Cash-Settled Stock Appreciation Rights P

February 28, 2018 EX-21.1

Subsidiaries of the Company.

Exhibit 21.1 Subsidiaries of the Company The following are wholly owned subsidiaries of Carrizo Oil & Gas, Inc.: Bandelier Pipeline Holding, LLC Carrizo (Eagle Ford) LLC Carrizo (Marcellus) LLC Carrizo (Marcellus) WV LLC Carrizo (Niobrara) LLC Carrizo (Permian) LLC Carrizo (Utica) LLC Carrizo Marcellus Holding Inc. CLLR, Inc. Hondo Pipeline, Inc. Mescalero Pipeline, LLC

February 28, 2018 EX-10.20

Form of Employee Performance Share Award Agreement (Officer) under the 2017 Incentive Plan.

Exhibit 10.20 2017 INCENTIVE PLAN OF CARRIZO OIL & GAS, INC. PERFORMANCE SHARE AWARD AGREEMENT (Officer) THIS AGREEMENT (the “Agreement”) is effective as of , 20 (the “Grant Date”), by and between Carrizo Oil & Gas, Inc., a Texas corporation (the “Company”), and (the “Grantee”). The Company has adopted the 2017 Incentive Plan of Carrizo Oil & Gas, Inc., as amended and restated effective May 16, 20

February 28, 2018 EX-10.21

Form of Employee Stock Appreciation Rights Agreement (Officer) under the 2017 Incentive Plan.

Exhibit 10.21 2017 INCENTIVE PLAN OF CARRIZO OIL & GAS, INC. EMPLOYEE STOCK APPRECIATION RIGHTS AGREEMENT (Officer) THIS AGREEMENT (“Agreement”) is effective as of , 20 (the “Grant Date”), by and between Carrizo Oil & Gas, Inc., a Texas corporation (the “Company”), and (the “Grantee”). The Company has adopted the 2017 Incentive Plan of Carrizo Oil & Gas, Inc., as amended and restated effective May

February 28, 2018 EX-99.1

Summary of Reserve Report and Report of Ryder Scott Company, L.P. as of December 31, 2017.

Exhibit 99.1 Carrizo Oil & Gas, Inc. Estimated Future Reserves and Income Attributable to Certain Leasehold Interests SEC Parameters As of December 31, 2017 /s/ Michael F. Stell Michael F. Stell, P.E. TBPE License No. 56416 Advising Senior Vice President [SEAL] RYDER SCOTT COMPANY, L.P. TBPE Firm Registration No. F-1580 [Ryder Scott Company L.P. logo] TBPE REGISTERED ENGINEERING FIRM F-1580 FAX (7

February 28, 2018 EX-2.2

Purchase and Sale Agreement dated December 9, 2017 between Carrizo Oil & Gas, Inc., Carrizo (Eagle Ford) LLC, and EP Energy E&P Company, L.P., as amended by that certain Closing Agreement and Amendment to Purchase and Sale Agreement dated as of January 31, 2018 between the parties thereto.

Exhibit 2.2 PURCHASE AND SALE AGREEMENT between CARRIZO OIL & GAS, INC. and CARRIZO (EAGLE FORD) LLC, as Seller and EP ENERGY E&P Company, L.P. as Buyer dated December 11, 2017 TABLE OF CONTENTS Page Article I DEFINITIONS AND INTERPRETATION 1 Section 1.1. Defined Terms 1 Section 1.2. Interpretations 1 Article II PURCHASE AND SALE 2 Section 2.1. Purchase and Sale 2 Section 2.2. Excluded Assets 4 Se

February 26, 2018 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

Document 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 26, 2018 CARRIZO OIL & GAS, INC. (Exact name of registrant as specified in its charter) Texas 000-29187-87 76-0415919 (State or other jurisdiction of incorporation)

February 26, 2018 EX-99.1

Crude Oil NGLs Natural Gas Total PV-10 Region (MMBbl) (MMBbl) (Bcf) (MMBoe) ($MM) Eagle Ford 124.2 21.7 126.7 167.0 $1,871.2 Delaware Basin 40.4 20.4 180.5 90.9 715.0 Niobrara 2.8 0.5 3.3 3.8 52.2 Total 167.4 42.6 310.5 261.7 $2,638.4

Exhibit Exhibit 99.1 CARRIZO OIL & GAS, INC. News PRESS RELEASE Contact: Jeffrey P. Hayden, CFA, VP - Investor Relations (713) 328-1044 Kim Pinyopusarerk, Manager - Investor Relations (713) 358-6430 CARRIZO OIL & GAS ANNOUNCES FOURTH QUARTER AND YEAR-END RESULTS AND PROVIDES 2018 GUIDANCE HOUSTON, February 26, 2018 - Carrizo Oil & Gas, Inc. (Nasdaq: CRZO) today announced the Company?s financial re

February 13, 2018 SC 13G/A

CRZO / Carrizo Oil & Gas, Inc. / NWQ INVESTMENT MANAGEMENT COMPANY, LLC - CARRIZO OIL & GAS INC Passive Investment

Carrizo Oil & Gas Inc UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.

February 8, 2018 SC 13G/A

CRZO / Carrizo Oil & Gas, Inc. / VANGUARD GROUP INC Passive Investment

SC 13G/A 1 carrizooilgasinc.htm SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 5 )* Name of issuer: Carrizo Oil & Gas Inc Title of Class of Securities: Common Stock CUSIP Number: 144577103 Date of Event Which Requires Filing of this Statement: December 31, 2017 Check the appropriate box to designate the rule pursuant

February 7, 2018 SC 13G/A

CRZO / Carrizo Oil & Gas, Inc. / FRONTIER CAPITAL MANAGEMENT CO LLC - SC 13G/A Passive Investment

SC 13G/A 1 d529799dsc13ga.htm 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. 7) CARRIZO OIL & GAS INC (Name of Issuer) COMMON STOCKS (Title of Class of Securities) 144577103 (CUSIP Number) DECEMBER 31, 2017 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to de

February 6, 2018 EX-99.1

CARRIZO OIL & GAS, INC. UNAUDITED PRO FORMA CONDENSED CONSOLIDATED FINANCIAL INFORMATION

Exhibit Exhibit 99.1 CARRIZO OIL & GAS, INC. UNAUDITED PRO FORMA CONDENSED CONSOLIDATED FINANCIAL INFORMATION On December 11, 2017, Carrizo Oil & Gas, Inc. (the ?Company?), along with its wholly-owned subsidiary, Carrizo (Eagle Ford) LLC, entered into a purchase and sale agreement with EP Energy E&P Company, L.P. to sell a portion of its assets in the Eagle Ford Shale (the ?Eagle Ford Properties?)

February 6, 2018 8-K

Financial Statements and Exhibits, Completion of Acquisition or Disposition of Assets, Other Events

Document 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 31, 2018 CARRIZO OIL & GAS, INC. (Exact name of registrant as specified in its charter) Texas 000-29187-87 76-0415919 (State or other jurisdiction of incorporation) (

February 1, 2018 EX-99.1

CARRIZO OIL & GAS, INC.

Exhibit 99.1 CARRIZO OIL & GAS, INC. News PRESS RELEASE Contact: Jeffrey P. Hayden, CFA, VP - Investor Relations (713) 328-1044 Kim Pinyopusarerk, Manager - Investor Relations (713) 358-6430 CARRIZO OIL & GAS ANNOUNCES CLOSING OF EAGLE FORD SHALE DIVESTITURE AND PARTIAL REDEMPTION OF ITS 7.50% SENIOR NOTES DUE 2020 HOUSTON , February 1, 2018 - Carrizo Oil & Gas, Inc. (Nasdaq: CRZO) today announced

February 1, 2018 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Other Events

Document 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 31, 2018 CARRIZO OIL & GAS, INC. (Exact name of registrant as specified in its charter) Texas 000-29187-87 76-0415919 (State or other jurisdiction of incorporation) (

January 22, 2018 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Other Events

Document 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 19, 2018 CARRIZO OIL & GAS, INC. (Exact name of registrant as specified in its charter) Texas 000-29187-87 76-0415919 (State or other jurisdiction of incorporation) (

January 22, 2018 EX-99.1

(713) 328-1044

Exhibit Exhibit 99.1 CARRIZO OIL & GAS, INC. News PRESS RELEASE Contact: Jeffrey P. Hayden, CFA, VP - Investor Relations (713) 328-1044 Kim Pinyopusarerk, Manager - Investor Relations (713) 358-6430 CARRIZO OIL & GAS ANNOUNCES CLOSING OF DJ BASIN DIVESTITURE AND PARTIAL REDEMPTION OF ITS 7.50% SENIOR NOTES DUE 2020 AND 8.875% REDEEMABLE PREFERRED STOCK HOUSTON, January 22, 2018 - Carrizo Oil & Gas

December 15, 2017 EX-99.1

CARRIZO OIL & GAS, INC.

Exhibit Exhibit 99.1 CARRIZO OIL & GAS, INC. News PRESS RELEASE Contact: Jeffrey P. Hayden, CFA, VP - Investor Relations (713) 328-1044 Kim Pinyopusarerk, Manager - Investor Relations (713) 358-6430 CARRIZO OIL & GAS ANNOUNCES THE DIVESTITURE OF A PORTION OF ITS EAGLE FORD ACREAGE HOUSTON , December 12, 2017 - Carrizo Oil & Gas, Inc. (Nasdaq: CRZO) today announced that it entered into an agreement

December 15, 2017 8-K

Regulation FD Disclosure, 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 11, 2017 CARRIZO OIL & GAS, INC. (Exact name of registrant as specified in its charter) Texas 000-29187-87 76-0415919 (State or other jurisdiction of incorporation) (Commissi

November 28, 2017 EX-99.1

CARRIZO OIL & GAS ANNOUNCES PARTIAL REDEMPTION OF 7.50% SENIOR NOTES DUE 2020

EX-99.1 Exhibit 99.1 CARRIZO OIL & GAS, INC. News PRESS RELEASE Contact: Jeffrey P. Hayden, CFA, VP - Investor Relations (713) 328-1044 Kim Pinyopusarerk, Manager - Investor Relations (713) 358-6430 CARRIZO OIL & GAS ANNOUNCES PARTIAL REDEMPTION OF 7.50% SENIOR NOTES DUE 2020 HOUSTON, November 28, 2017 - Carrizo Oil & Gas, Inc. (NASDAQ: CRZO) today announced that it has delivered a notice to the t

November 28, 2017 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): November 28, 2017 CARRIZO OIL & GAS, INC. (Exact name of registrant as specified in its charter) Texas 000-29187-87 76-0415919 (State or other jurisdiction of incorporation) (Comm

November 9, 2017 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q þ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2017 o TRANSITION REPORT UNDER SE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q þ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2017 o TRANSITION REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 000-29187-87 CARRIZO OIL & GAS, INC

November 9, 2017 EX-10.3

Eleventh Amendment to Credit Agreement, dated as of November 3, 2017, among Carrizo Oil & Gas, Inc., as borrower, Wells Fargo Bank, National Association, as administrative agent, and the lender parties thereto (incorporated herein by reference to Exhibit 10.3 to the Company’s Current Report on Form 10-Q filed on November 9, 2017 (File No. 000-29187087)).

Exhibit 10.3 ELEVENTH AMENDMENT TO CREDIT AGREEMENT DATED AS OF NOVEMBER 3, 2017 AMONG CARRIZO OIL & GAS, INC., AS BORROWER, THE GUARANTORS PARTY HERETO, WELLS FARGO BANK, NATIONAL ASSOCIATION, AS ADMINISTRATIVE AGENT, CREDIT AGRICOLE CORPORATE AND INVESTMENT BANK AND ROYAL BANK OF CANADA, AS CO-SYNDICATION AGENTS, COMPASS BANK AND SG AMERICAS SECURITIES, LLC, AS CO-DOCUMENTATION AGENTS AND THE LE

November 7, 2017 EX-99.1

(Financial Highlights to Follow) CARRIZO OIL & GAS, INC. CONSOLIDATED BALANCE SHEETS (In thousands, except share and per share amounts) (Unaudited) September 30, 2017 December 31, 2016 Assets Current assets Cash and cash equivalents $5,092 $4,194 Acc

Exhibit Exhibit 99.1 CARRIZO OIL & GAS, INC. News PRESS RELEASE Contact: Jeffrey P. Hayden, CFA, VP - Investor Relations (713) 328-1044 Kim Pinyopusarerk, Manager - Investor Relations (713) 358-6430 CARRIZO OIL & GAS ANNOUNCES THIRD QUARTER RESULTS HOUSTON, November 7, 2017 - Carrizo Oil & Gas, Inc. (Nasdaq: CRZO) today announced the Company?s financial results for the third quarter of 2017 and pr

November 7, 2017 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

Document 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 7, 2017 CARRIZO OIL & GAS, INC. (Exact name of registrant as specified in its charter) Texas 000-29187-87 76-0415919 (State or other jurisdiction of incorporation) (

October 25, 2017 EX-12.1

Computation of ratio of earnings to fixed charges for each of the years in the five-year period ended December 31, 2016 and the six-month period ended June 30, 2017.

EX-12.1 Exhibit 12.1 CARRIZO OIL & GAS, INC. STATEMENT OF COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES (In thousands, except ratios) Year Ended December 31, Six Months Ended June 30, 2016 2015 2014 2013 2012 2017 Earnings Income (loss) from continuing operations before income taxes ($ 675,474 ) ($ 1,298,760 ) $ 350,210 $ 34,761 $ 82,133 $ 96,327 Fixed charges 100,299 105,003 90,451 86,795 74,

October 25, 2017 S-3ASR

Carrizo Oil & Gas S-3ASR

S-3ASR Table of Contents As filed with the Securities and Exchange Commission on October 25, 2017 Registration No.

October 25, 2017 EX-25.2

Form T-1 Statement of Eligibility of Trustee with respect to the Subordinated Indenture.

EX-25.2 Exhibit 25.2 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM T-1 STATEMENT OF ELIGIBILITY UNDER THE TRUST INDENTURE ACT OF 1939 OF A CORPORATION DESIGNATED TO ACT AS TRUSTEE ? CHECK IF AN APPLICATION TO DETERMINE ELIGIBILITY OF A TRUSTEE PURSUANT TO SECTION 305(b) (2) WELLS FARGO BANK, NATIONAL ASSOCIATION (Exact name of trustee as specified in its charter) A N

October 25, 2017 EX-12.1

Computation of ratio of earnings to fixed charges for each of the years in the five-year period ended December 31, 2016 and the six-month period ended June 30, 2017.

EX-12.1 Exhibit 12.1 CARRIZO OIL & GAS, INC. STATEMENT OF COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES (In thousands, except ratios) Year Ended December 31, Six Months Ended June 30, 2016 2015 2014 2013 2012 2017 Earnings Income (loss) from continuing operations before income taxes ($ 675,474 ) ($ 1,298,760 ) $ 350,210 $ 34,761 $ 82,133 $ 96,327 Fixed charges 100,299 105,003 90,451 86,795 74,

October 25, 2017 EX-4.48

Form of Indenture relating to subordinated debt securities of the Company.

EX-4.48 Exhibit 4.48 FORM OF SUBORDINATED INDENTURE CARRIZO OIL & GAS, INC. as Issuer and THE POTENTIAL SUBSIDIARY GUARANTORS LISTED ON THE SIGNATURE PAGES HERETO as Potential Subsidiary Guarantors and [ ] as Trustee Indenture Dated as of [ , ] Subordinated Debt Securities CARRIZO OIL & GAS, INC. Reconciliation and tie between Trust Indenture Act of 1939 and Indenture, dated as of [ , ] Section of

October 25, 2017 S-3ASR

Carrizo Oil & Gas S-3ASR

S-3ASR Table of Contents As filed with the Securities and Exchange Commission on October 25, 2017 Registration No.

October 25, 2017 EX-25.1

Form T-1 Statement of Eligibility of Trustee with respect to the Senior Indenture.

EX-25.1 Exhibit 25.1 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM T-1 STATEMENT OF ELIGIBILITY UNDER THE TRUST INDENTURE ACT OF 1939 OF A CORPORATION DESIGNATED TO ACT AS TRUSTEE ? CHECK IF AN APPLICATION TO DETERMINE ELIGIBILITY OF A TRUSTEE PURSUANT TO SECTION 305(b) (2) WELLS FARGO BANK, NATIONAL ASSOCIATION (Exact name of trustee as specified in its charter) A N

October 25, 2017 EX-99.1

Independent Auditors’ Report

EX-99.1 Exhibit 99.1 Independent Auditors? Report The Members of ExL Petroleum Management, LLC Midland, Texas We have audited the accompanying combined statement of revenues and direct operating expenses of oil and gas property interests to be acquired by Carrizo Oil & Gas, Inc. (the ?Statement?) for the year ended December 31, 2016, and the related notes to the Statement. Management?s Responsibil

October 25, 2017 EX-99.2

UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL INFORMATION

EX-99.2 Exhibit 99.2 UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL INFORMATION On June 28, 2017, we and our wholly-owned subsidiary Carrizo (Permian) LLC entered into a purchase and sale agreement with ExL to acquire the ExL Properties. The transaction has an effective date of May 1, 2017 and closed on August 10, 2017. The following unaudited pro forma condensed combined financial information i

October 25, 2017 8-K/A

Financial Statements and Exhibits

8-K/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A 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 10, 2017 CARRIZO OIL & GAS, INC. (Exact name of registrant as specified in its charter) Texas 000-29187-87 76-0415919 (State or other jurisdiction of incorporation) (Co

August 11, 2017 EX-99.1

CARRIZO OIL & GAS ANNOUNCES CLOSING OF DELAWARE BASIN ACQUISITION

EX-99.1 Exhibit 99.1 CARRIZO OIL & GAS, INC. News PRESS RELEASE Contact: Jeffrey P. Hayden, CFA, VP - Investor Relations (713) 328-1044 Kim Pinyopusarerk, Manager - Investor Relations (713) 358-6430 CARRIZO OIL & GAS ANNOUNCES CLOSING OF DELAWARE BASIN ACQUISITION HOUSTON, August 11, 2017 - Carrizo Oil & Gas, Inc. (Nasdaq: CRZO) today announced that it has completed the closing of the transactions

August 11, 2017 8-K

Carrizo Oil & Gas 8-K (Current Report/Significant Event)

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 10, 2017 CARRIZO OIL & GAS, INC. (Exact name of registrant as specified in its charter) Texas 000-29187-87 76-0415919 (State or other jurisdiction of incorporation) (Commis

August 11, 2017 EX-4.1

Warrant Agreement, dated as of August 10, 2017, between Carrizo Oil & Gas, Inc. and Wells Fargo Bank, N.A., as warrant agent (incorporated herein by reference to Exhibit 4.1 to the Company’s Current Report on Form 8-K filed on August 11, 2017 (File No. 000-291870-87)).

EX-4.1 Exhibit 4.1 Execution Version CARRIZO OIL & GAS, INC. (as Issuer) and WELLS FARGO BANK, N.A. (as Warrant Agent) Warrant Agreement Dated as of August 10, 2017 Warrants Exercisable for Shares of Common Stock TABLE OF CONTENTS Page ARTICLE 1. DEFINITIONS Section 1.01 Definitions 1 Section 1.02 Rules of Construction 5 ARTICLE 2. APPOINTMENT OF WARRANT AGENT Section 2.01 Appointment of Warrant A

August 11, 2017 EX-3.1

Statement of Resolutions Establishing Series of 8.875% Redeemable Preferred Stock of the Company (incorporated herein by reference to Exhibit 3.1 to the Company’s Current Report on Form 8-K filed on August 11, 2017 (File No. 000-29187-87)).

EX-3.1 Exhibit 3.1 STATEMENT OF RESOLUTIONS ESTABLISHING SERIES OF 8.875% REDEEMABLE PREFERRED STOCK OF CARRIZO OIL & GAS, INC. Pursuant to Section 21.155 and Section 21.156 of the Texas Business Organizations Code: CARRIZO OIL & GAS, INC., a Texas corporation, certifies that pursuant to the authority contained in Article Four of its Amended and Restated Articles of Incorporation, as amended, and

August 11, 2017 EX-10.2

Standstill and Voting Agreement dated as of August 10, 2017 between Carrizo Oil & Gas, Inc. and the GSO Funds party thereto (incorporated herein by reference to Exhibit 10.2 to the Company’s Current Report on Form 8-K filed on August 11, 2017 (File No. 000-291870-87)).

EX-10.2 Exhibit 10.2 Execution Version STANDSTILL AND VOTING AGREEMENT BY AND BETWEEN CARRIZO OIL & GAS, INC. AND THE GSO FUNDS STANDSTILL AND VOTING AGREEMENT This STANDSTILL AND VOTING AGREEMENT (this ?Agreement?) is made and entered into as of August 10, 2017, by and between (a) Carrizo Oil & Gas, Inc., a Texas corporation (the ?Company?), and (b) the funds specified on the signature pages here

August 11, 2017 EX-10.1

Registration Rights Agreement, dated as of August 10, 2017, between Carrizo Oil & Gas, Inc. and the GSO Funds party thereto (incorporated herein by reference to Exhibit 10.1 to Carrizo Oil & Gas, Inc.’s Current Report on Form 8-K, filed on August 11, 2017 File No. 000-29187-87).

EX-10.1 Exhibit 10.1 Execution Version REGISTRATION RIGHTS AGREEMENT BY AND AMONG CARRIZO OIL & GAS, INC. AND THE GSO FUNDS PARTY HERETO Table of Contents Page ARTICLE I DEFINITIONS 1 Section 1.01 Definitions 1 Section 1.02 Registrable Securities 6 ARTICLE II REGISTRATION RIGHTS 6 Section 2.01 Shelf Registration 6 Section 2.02 Delay Rights 8 Section 2.03 Underwritten Offerings 9 Section 2.04 Sale

August 10, 2017 NT 10-Q

Carrizo Oil & Gas NT 10-Q

NT 10-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 12b-25 SEC File Number 000-29187-87 CUSIP Number 144577103 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, 2017 ? Transition Report on Form 10-K ? Transition Report on Form 20-F ? Transition Report on Form 11-K ? Transiti

August 10, 2017 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q þ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2017 o TRANSITION REPORT UNDER SECTION

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q þ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2017 o TRANSITION REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 000-29187-87 CARRIZO OIL & GAS, INC. (Ex

August 8, 2017 EX-99.1

(Financial Highlights to Follow) CARRIZO OIL & GAS, INC. CONSOLIDATED BALANCE SHEETS (In thousands, except share and per share amounts) (Unaudited) June 30, 2017 December 31, 2016 Assets Current assets Cash and cash equivalents $2,228 $4,194 Accounts

Exhibit Exhibit 99.1 CARRIZO OIL & GAS, INC. News PRESS RELEASE Contact: Jeffrey P. Hayden, CFA, VP - Investor Relations (713) 328-1044 Kim Pinyopusarerk, Manager - Investor Relations (713) 358-6430 CARRIZO OIL & GAS ANNOUNCES SECOND QUARTER RESULTS HOUSTON, August 8, 2017 - Carrizo Oil & Gas, Inc. (Nasdaq: CRZO) today announced the Company?s financial results for the second quarter of 2017 and pr

August 8, 2017 8-K

Carrizo Oil & Gas 8-K (Current Report/Significant Event)

Document 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 8, 2017 CARRIZO OIL & GAS, INC. (Exact name of registrant as specified in its charter) Texas 000-29187-87 76-0415919 (State or other jurisdiction of incorporation) (Co

July 24, 2017 8-K

Carrizo Oil & Gas 8-K (Current Report/Significant Event)

Document 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 19, 2017 CARRIZO OIL & GAS, INC. (Exact name of registrant as specified in its charter) Texas 000-29187-87 76-0415919 (State or other jurisdiction of incorporation) (Com

July 24, 2017 EX-16.1

July 24, 2017

Exhibit Exhibit 16.1 July 24, 2017 Securities and Exchange Commission Washington, D.C. 20549 Ladies and Gentlemen: We were previously principal accountants for Carrizo Oil & Gas, Inc. and, under the date of February 27, 2017, we reported on the consolidated financial statements of Carrizo Oil & Gas, Inc. as of and for the years ended December 31, 2016 and 2015 and the effectiveness of internal con

July 14, 2017 EX-4.2

Twentieth Supplemental Indenture, dated July 14, 2017, among Carrizo Oil & Gas, Inc., the subsidiary guarantors named therein and Wells Fargo Bank, National Association, as trustee

EX-4.2 Exhibit 4.2 Execution Version TWENTIETH SUPPLEMENTAL INDENTURE among CARRIZO OIL & GAS, INC. as Issuer and THE SUBSIDIARY GUARANTORS NAMED ON THE SIGNATURE PAGE HEREOF as Subsidiary Guarantors and WELLS FARGO BANK, NATIONAL ASSOCIATION, as Trustee 8.250% Senior Notes due 2025 July 14, 2017 TABLE OF CONTENTS Page ARTICLE ONE THE NOTES 2 SECTION 101 Designation of Notes; Establishment of Form

July 14, 2017 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

8-K 1 d399736d8k.htm 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): July 14, 2017 CARRIZO OIL & GAS, INC. (Exact name of registrant as specified in its charter) Texas 000-29187-87 76-0415919 (State or other jurisdiction o

July 3, 2017 424B5

CALCULATION OF REGISTRATION FEE Title of securities to be registered Maximum Aggregate Offering Price Amount of Registration Fee (1) 8.25% Senior Notes due 2025 $250,000,000 $28,975

424B5 1 d418947d424b5.htm 424B5 Table of Contents Index to Financial Statements Filed pursuant to Rule 424(b)(5) Registration Statement No. 333-198459 CALCULATION OF REGISTRATION FEE Title of securities to be registered Maximum Aggregate Offering Price Amount of Registration Fee (1) 8.25% Senior Notes due 2025 $250,000,000 $28,975 (1) Calculated in accordance with Rule 457(r) of the Securities Act

July 1, 2017 8-K

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): June 29, 2017 CARRIZO OIL & GAS, INC. (Exact name of registrant as specified in its charter) Texas 000-29187-87 76-0415919 (State or other jurisdiction of incorporation) (Commissi

July 1, 2017 EX-1.1

$250,000,000 Carrizo Oil & Gas, Inc. 8.250% Senior Notes due 2025 UNDERWRITING AGREEMENT

EX-1.1 Exhibit 1.1 Execution Version $250,000,000 Carrizo Oil & Gas, Inc. 8.250% Senior Notes due 2025 UNDERWRITING AGREEMENT June 29, 2017 CITIGROUP GLOBAL MARKETS INC. MERRILL LYNCH, PIERCE, FENNER & SMITH INCORPORATED As Representatives of the Several Underwriters c/o Citigroup Global Markets Inc. 388 Greenwich Street New York, New York 10013 c/o Merrill Lynch, Pierce, Fenner & Smith Incorporat

July 1, 2017 EX-1.1

15,600,000 Shares Carrizo Oil & Gas, Inc. Common Stock ($0.01 Par Value) UNDERWRITING AGREEMENT

EX-1.1 Exhibit 1.1 Execution Version 15,600,000 Shares Carrizo Oil & Gas, Inc. Common Stock ($0.01 Par Value) UNDERWRITING AGREEMENT June 28, 2017 GOLDMAN SACHS & CO. LLC WELLS FARGO SECURITIES, LLC As Representatives of the Several Underwriters c/o Goldman Sachs & Co. LLC 200 West Street New York, New York 10282 c/o Wells Fargo Securities, LLC 375 Park Avenue New York, New York 10152 Ladies and G

July 1, 2017 8-K

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): June 28, 2017 CARRIZO OIL & GAS, INC. (Exact name of registrant as specified in its charter) Texas 000-29187-87 76-0415919 (State or other jurisdiction of incorporation) (Commissi

June 30, 2017 424B5

CALCULATION OF REGISTRATION FEE Title of securities to be registered Amount to be registered Maximum offering price per share Maximum Aggregate Offering Price Amount of Registration Fee (1) Common Stock 15,600,000 $14.60 $227,760,000 $26,397.38

424B5 Table of Contents Index to Financial Statements Filed pursuant to Rule 424(b)(5) Registration Statement No.

June 30, 2017 FWP

CARRIZO OIL & GAS, INC. Pricing Term Sheet

FWP 1 d418947dfwp.htm FWP Issuer Free Writing Prospectus Filed by: Carrizo Oil & Gas, Inc. Pursuant to Rule 433 under the Securities Act of 1933 Registration Statement on Form S-3: No. 333-198459 June 29, 2017 CARRIZO OIL & GAS, INC. Pricing Term Sheet The information in this pricing term sheet relates to the offering of the 8.250% Senior Notes due 2025 (the “Notes Offering”) and should be read to

June 28, 2017 FWP

Carrizo Oil & Gas, Inc. EXL Acquisition presentation June 28, 2017 Filed Pursuant to Rule 433 Registration Statement No. 333-198459 June 28, 2017

FWP 1 d414574dfwp.htm FWP Carrizo Oil & Gas, Inc. EXL Acquisition presentation June 28, 2017 Filed Pursuant to Rule 433 Registration Statement No. 333-198459 June 28, 2017 Free Writing Prospectus Legend The issuer has filed a registration statement (No. 333-198459) (including a prospectus) with the Securities and Exchange Commission(“SEC”) for the offering to which this communication relates. Befo

June 28, 2017 424B5

SUBJECT TO COMPLETION, DATED JUNE 28, 2017

424B5 Table of Contents Index to Financial Statements Filed pursuant to Rule 424(b)(5) Registration Statement No.

June 28, 2017 424B5

SUBJECT TO COMPLETION, DATED JUNE 28, 2017

424B5 1 d418945d424b5.htm 424B5 Table of Contents Index to Financial Statements Filed pursuant to Rule 424(b)(5) Registration Statement No. 333-198459 The information in this preliminary prospectus supplement is not complete and may be changed. This preliminary prospectus supplement and the attached prospectus are not an offer to sell nor do they seek an offer to buy these securities in any jurisd

June 28, 2017 EX-10.1

Preferred Stock Purchase Agreement dated as of June 28, 2017 between Carrizo Oil & Gas, Inc. and the purchasers named therein (incorporated herein by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K filed on June 28, 2017 (File No. 000-29187087)).

EX-10.1 Exhibit 10.1 Execution Version PREFERRED STOCK PURCHASE AGREEMENT among CARRIZO OIL & GAS, INC. and THE PURCHASERS PARTY HERETO TABLE OF CONTENTS Page ARTICLE I DEFINITIONS Section 1.01 Definitions 1 Section 1.02 Accounting Procedures and Interpretation 7 ARTICLE II AGREEMENT TO SELL AND PURCHASE Section 2.01 Purchase 7 Section 2.02 Closing 8 Section 2.03 Purchase Price: Warrant Valuation

June 28, 2017 8-K

Entry into a Material Definitive Agreement, Unregistered Sales of Equity Securities, 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): June 28, 2017 CARRIZO OIL & GAS, INC. (Exact name of registrant as specified in its charter) Texas 000-29187-87 76-0415919 (State or other jurisdiction of incorporation) (Commissi

June 28, 2017 EX-99.1

UDATED 2017 DEVELOPMENT PLAN AND GUIDANCE SUMMARY Previous Pro Forma Operated Drilling Activity - Eagle Ford Shale 91 net wells 75 net wells Delaware Basin 6 net wells 17 net wells Operated Completion Activity - Eagle Ford Shale 85 net wells 84 net w

EX-99.1 Exhibit 99.1 CARRIZO OIL & GAS, INC. News PRESS RELEASE Contact: Jeffrey P. Hayden, CFA, VP - Investor Relations (713) 328-1044 Kim Pinyopusarerk, Manager - Investor Relations (713) 358-6430 CARRIZO OIL & GAS ANNOUNCES DELAWARE BASIN ACQUISITION AND PROVIDES OPERATIONAL UPDATE HOUSTON, June 28, 2017 - Carrizo Oil & Gas, Inc. (Nasdaq: CRZO) today announced that it has agreed to acquire Dela

June 28, 2017 EX-2.1

Purchase and Sale Agreement dated as of June 28, 2017 by and among ExL Petroleum Management, LLC, ExL Petroleum Operating Inc., Carrizo Oil & Gas, Inc., and Carrizo (Permian) LLC (incorporated herein by reference to Exhibit 2.1 to the Company’s Current Report on Form 8-K filed June 28, 2017 (File No. 000-29187-87)).

EX-2.1 Exhibit 2.1 Execution Version PURCHASE AND SALE AGREEMENT BY AND BETWEEN EXL PETROLEUM MANAGEMENT, LLC AND EXL PETROLEUM OPERATING INC. AS SELLER AND CARRIZO (PERMIAN) LLC AS BUYER LIST OF EXHIBITS AND SCHEDULES Exhibit A, Schedule 1 ? Leases Exhibit A, Schedule 2 ? Wells Exhibit A, Schedule 3 ? Easements Exhibit A, Schedule 4 ? Partially Assigned Contracts Exhibit A, Schedule 5 ? Fee Surfa

June 28, 2017 EX-99.2

Independent Auditors’ Report

EX-99.2 Exhibit 99.2 Independent Auditors’ Report The Members of ExL Petroleum Management, LLC Midland, Texas We have audited the accompanying combined statement of revenues and direct operating expenses of oil and gas property interests to be acquired by Carrizo Oil & Gas, Inc. (the “Statement”) for the year ended December 31, 2016, and the related notes to the Statement. Management’s Responsibil

June 28, 2017 EX-99.3

CARRIZO OIL & GAS, INC. UNAUDITED PRO FORMA CONDENSED COMBINED BALANCE SHEET (in thousands, except per share amounts) March 31, 2017 Historical Pro Forma Adjustments Pro Forma Assets Total current assets $ 73,226 $ 17,134 (1 )(2) $ 90,360 Property an

EX-99.3 Exhibit 99.3 CARRIZO OIL & GAS, INC. UNAUDITED PRO FORMA CONDENSED COMBINED BALANCE SHEET (in thousands, except per share amounts) March 31, 2017 Historical Pro Forma Adjustments Pro Forma Assets Total current assets $ 73,226 $ 17,134 (1 )(2) $ 90,360 Property and equipment Oil and gas properties, net, full cost method Proved properties, net 1,371,335 143,695 (2 ) 1,515,030 Unproved proper

June 28, 2017 EX-10.1

Tenth Amendment to Credit Agreement, dated as of June 28, 2017, among Carrizo Oil & Gas, Inc., as borrower, Wells Fargo Bank, National Association, as administrative agent, and the lender parties thereto (incorporated herein by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K filed on June 28, 2017 (File No. 000-291870-87)).

EX-10.1 Exhibit 10.1 TENTH AMENDMENT TO CREDIT AGREEMENT DATED AS OF JUNE 28, 2017 AMONG CARRIZO OIL & GAS, INC., AS BORROWER, THE GUARANTORS PARTY HERETO, WELLS FARGO BANK, NATIONAL ASSOCIATION, AS ADMINISTRATIVE AGENT, CREDIT AGRICOLE CORPORATE AND INVESTMENT BANK AND ROYAL BANK OF CANADA, AS CO-SYNDICATION AGENTS, COMPASS BANK AND SG AMERICAS SECURITIES, LLC, AS CO-DOCUMENTATION AGENTS AND THE

June 28, 2017 8-K

Regulation FD Disclosure, Entry into a Material Definitive Agreement, 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): June 28, 2017 CARRIZO OIL & GAS, INC. (Exact name of registrant as specified in its charter) Texas 000-29187-87 76-0415919 (State or other jurisdiction of incorporation) (Commissi

June 28, 2017 EX-4.12

Certificate of Formation of Carrizo (Permian) LLC (incorporated herein by reference to Exhibit 4.12 to the Company’s Post-Effective Amendment to the Company’s Registration Statement on Form S-3 (Registration No. 333-198459)).

EX-4.12 Exhibit 4.12 State of Delaware Secretary of State Division of Corporations Delivered 11:57 AM 02/27/2013 FILED 11:35 AM 02/27/2013 SRV 130239919 ? 5294945 FILE CERTIFICATE OF FORMATION OF CARRIZO (PERMIAN) LLC This Certificate of Formation of Carrizo (Permian) LLC (the ?Company?) is being executed and filed by the undersigned authorized person for the purpose of forming a limited liability

June 28, 2017 EX-25.1

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM T-1 STATEMENT OF ELIGIBILITY UNDER THE TRUST INDENTURE ACT OF 1939 OF A CORPORATION DESIGNATED TO ACT AS TRUSTEE

EX-25.1 Exhibit 25.1 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM T-1 STATEMENT OF ELIGIBILITY UNDER THE TRUST INDENTURE ACT OF 1939 OF A CORPORATION DESIGNATED TO ACT AS TRUSTEE ? CHECK IF AN APPLICATION TO DETERMINE ELIGIBILITY OF A TRUSTEE PURSUANT TO SECTION 305(b)(2) WELLS FARGO BANK, NATIONAL ASSOCIATION (Exact name of trustee as specified in its charter) A Na

June 28, 2017 EX-12.1

CARRIZO OIL & GAS, INC. STATEMENT OF COMPUTATION OF RATIOS OF EARNINGS TO FIXED CHARGES (In thousands, except ratios) Years Ended December 31, Three Months Ended March 31, 2016 2015 2014 2013 2012 2017 Earnings Income (loss) from continuing operation

EX-12.1 Exhibit 12.1 CARRIZO OIL & GAS, INC. STATEMENT OF COMPUTATION OF RATIOS OF EARNINGS TO FIXED CHARGES (In thousands, except ratios) Years Ended December 31, Three Months Ended March 31, 2016 2015 2014 2013 2012 2017 Earnings Income (loss) from continuing operations before income taxes ($ 675,474 ) ($ 1,298,760 ) $ 350,210 $ 34,761 $ 82,133 $ 40,021 Fixed charges 100,299 105,003 90,451 86,79

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