STXB / Spirit of Texas Bancshares Inc - SEC-arkivering, Årsberetning, Fuldmagtserklæring

Spirit of Texas Bancshares Inc
US ˙ NASDAQ ˙ US84861D1037
DETTE SYMBOL ER IKKE LÆNGERE AKTIVT

Grundlæggende statistik
LEI 254900PTELTRJ8RGJD53
CIK 1499453
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 Spirit of Texas Bancshares Inc
SEC Filings (Chronological Order)
Denne side giver en komplet, kronologisk liste over SEC-arkiveringer, eksklusive ejerskabsregistreringer, som vi leverer andre steder.
April 18, 2022 15-12B

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 15 CERTIFICATION AND NOTICE OF TERMINATION OF REGISTRATION UNDER SECTION 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR SUSPENSION OF DUTY TO FILE REPORTS UNDER SECTIONS 13

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 15 CERTIFICATION AND NOTICE OF TERMINATION OF REGISTRATION UNDER SECTION 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR SUSPENSION OF DUTY TO FILE REPORTS UNDER SECTIONS 13 AND 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934. Commission File Number 001-38484 SPIRIT OF TEXAS BANCSHARES, INC. (Exact name of registrant as spec

April 11, 2022 POS AM

As filed with the Securities and Exchange Commission on April 11, 2022

As filed with the Securities and Exchange Commission on April 11, 2022 Registration No.

April 11, 2022 8-K

Changes in Control of Registrant, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, 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

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 8, 2022 Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas (State or other jurisdiction of incorporation) 001-38484 (Commission File N

April 11, 2022 POS AM

As filed with the Securities and Exchange Commission on April 11, 2022

As filed with the Securities and Exchange Commission on April 11, 2022 Registration No.

March 7, 2022 EX-4.3

Description of Registrant’s Common Stock

Exhibit 4.3 DESCRIPTION OF THE COMPANY?S COMMON STOCK REGISTERED UNDER SECTION 12 OF THE EXCHANGE ACT OF 1934 The following summary describes the material features and rights of the shares of common stock (the ?common stock?) of Spirit of Texas Bancshares, Inc. (referred to herein as the ?Company,? ?our,? ?us,? or ?we?). This summary does not purport to be a complete description of the terms and c

March 7, 2022 EX-21.1

List of Subsidiaries of Spirit of Texas Bancshares, Inc.

Exhibit 21.1 Subsidiaries of Spirit of Texas Bancshares, Inc. Entity Name State of Incorporation Spirit of Texas Bank, SSB Texas

March 7, 2022 10-K

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ? ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission File Number 001-38484 Spirit of Texas

March 2, 2022 8-K

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

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 2, 2022 (February 24, 2022) Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction of in

February 25, 2022 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): February 25, 2022 Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or Other Jurisdiction of Incorporation) (Co

February 25, 2022 EX-99.1

SPIRIT OF TEXAS BANCSHARES, INC. DECLARES QUARTERLY CASH DIVIDEND

Exhibit 99.1 SPIRIT OF TEXAS BANCSHARES, INC. DECLARES QUARTERLY CASH DIVIDEND CONROE, Texas, Feb. 25, 2022 /PRNewswire/ - Spirit of Texas Bancshares, Inc. (NASDAQ: STXB) (the "Company"), the bank holding company for Spirit of Texas Bank, today announced that on February 24, 2022, its Board of Directors declared a quarterly cash dividend in the amount of $0.12 per share of the Company's common sto

February 24, 2022 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 24, 2022 (February 24, 2022) Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction o

February 7, 2022 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): February 7, 2022 (February 4, 2022) Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction of

February 7, 2022 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): February 7, 2022 (February 4, 202

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 7, 2022 (February 4, 2022) Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction of

February 7, 2022 425

Simmons Receives Federal Reserve Approval for Pending Acquisition of Spirit of Texas Bancshares, Inc.

Filed by Simmons First National Corporation pursuant to Rule 425 under the Securities Act of 1933, as amended, and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934, as amended Subject Company: Spirit of Texas Bancshares, Inc.

January 27, 2022 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): January 27, 2022 SIMMONS FIRST NA

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 27, 2022 SIMMONS FIRST NATIONAL CORPORATION (Exact name of registrant as specified in its charter) Arkansas 000-06253 71-0407808 (State or Other Jurisdiction of Incorporation)

January 27, 2022 EX-99.1

SIMMONS FIRST NATIONAL CORPORATION REPORTS RECORD EARNINGS FOR 2021 Board of Directors authorizes new $175 million share repurchase program after substantially exhausting prior program in January 2022 and approves a 6 percent increase in the quarterl

Exhibit 99.1 For Immediate Release: January 27, 2022 SIMMONS FIRST NATIONAL CORPORATION REPORTS RECORD EARNINGS FOR 2021 Board of Directors authorizes new $175 million share repurchase program after substantially exhausting prior program in January 2022 and approves a 6 percent increase in the quarterly cash dividend ? Net income of $271.2 million for the full year of 2021, up 6 percent from the f

January 27, 2022 EX-99.2

Contents 4 Q4 &2021 Highlights 5 Q4 Results Overview 13 Loans 18 Deposits, Liquidity, Securities, Interest Rate Sensitivity & Capital 24 Credit Quality 27 Key Takeaways and Management Outlook 30 Appendix 4 th Quarter 2021 Earnings Presentation | NASD

Exhibit 99.2 Contents 4 Q4 &2021 Highlights 5 Q4 Results Overview 13 Loans 18 Deposits, Liquidity, Securities, Interest Rate Sensitivity & Capital 24 Credit Quality 27 Key Takeaways and Management Outlook 30 Appendix 4 th Quarter 2021 Earnings Presentation | NASDAQ: SFNC 2 Forward - Looking Statements and Non - GAAP Financial Measures Forward - Looking Statements . Certain statements by Simmons Fi

January 26, 2022 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): January 26, 2022 Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction of incorporation) (Com

January 26, 2022 EX-99.1

SPIRIT OF TEXAS BANCSHARES, INC. REPORTS FOURTH QUARTER 2021 FINANCIAL RESULTS

Exhibit 99.1 Contacts: Dennard Lascar Investor Relations Ken Dennard / Natalie Hairston (713) 529-6600 [email protected] SPIRIT OF TEXAS BANCSHARES, INC. REPORTS FOURTH QUARTER 2021 FINANCIAL RESULTS CONROE, TX ? January 26, 2022 ? Spirit of Texas Bancshares, Inc. (NASDAQ: STXB) (?Spirit,? the ?Company,? ?we,? ?our,? or ?us?), reported net income of $9.1 million in the fourth quarter of 2021,

January 20, 2022 DEFM14A

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 (Amendment No. )

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 (Amendment No. ) Filed by the Registrant ? Filed by a Party other than the Registrant ?o Check the appropriate box: ?o Preliminary Proxy Statement ?o Confidential, for Use of the Commission only (as permitted by Rule 14a-6

January 4, 2022 8-K

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 4, 2022 Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction of incorporation) (Comm

January 4, 2022 8-K/A

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/A (Amendment No. 2) 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 4, 2022 (November 19, 2020) Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or ot

January 4, 2022 EX-10.2

Executive Employment Agreement, dated June 10, 2021, by and between Spirit of Texas Bancshares, Inc. and Jerry D. Golemon (incorporated herein by reference to Exhibit 10.2 to the Company’s Current Report on Form 8-K/A filed with the SEC on January 4, 2022 (File No. 001-38484)).

Exhibit 10.2 EXECUTIVE EMPLOYMENT AGREEMENT (TIER II) This Executive Employment Agreement (this ?Agreement?) is by and between Spirit of Texas Bancshares, Inc., a Texas corporation (the ?Company?), and Jerry Golemon, an individual (referred to herein as ?Executive? or ?you?), and shall be effective as of June 10, 2021 (the ?Effective Date?). Preliminary Statements Executive desires to be employed

January 4, 2022 EX-3.1

Second Amended and Restated Bylaws of Spirit of Texas Bancshares, Inc.

Exhibit 3.1 SECOND AMENDED AND RESTATED BYLAWS OF SPIRIT OF TEXAS BANCSHARES, INC. (A TEXAS CORPORATION) TABLE OF CONTENTS ARTICLE I. OFFICES 1 Section 1.01. Registered Office 1 Section 1.02. Other Offices 1 ARTICLE II. SHAREHOLDERS 1 Section 2.01. Place of Meetings 1 Section 2.02. Annual Meeting 1 Section 2.03. List of Shareholders 1 Section 2.04. Special Meetings 1 Section 2.05. Notice 1 Section

January 4, 2022 EX-3.1

Second Amended and Restated Bylaws of Spirit of Texas Bancshares, Inc.

Exhibit 3.1 SECOND AMENDED AND RESTATED BYLAWS OF SPIRIT OF TEXAS BANCSHARES, INC. (A TEXAS CORPORATION) TABLE OF CONTENTS ARTICLE I. OFFICES 1 Section 1.01. Registered Office 1 Section 1.02. Other Offices 1 ARTICLE II. SHAREHOLDERS 1 Section 2.01. Place of Meetings 1 Section 2.02. Annual Meeting 1 Section 2.03. List of Shareholders 1 Section 2.04. Special Meetings 1 Section 2.05. Notice 1 Section

January 4, 2022 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): January 4, 2022 Spirit of Texas B

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 4, 2022 Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction of incorporation) (Comm

January 4, 2022 EX-10.1

Executive Employment Agreement, dated February 22, 2021, by and among Spirit of Texas Bancshares, Inc. and Allison S. Johnson (schedules and exhibits have been omitted pursuant to Item 601(a)(5) of Regulation S-K and will be provided to the Securities and Exchange Commission upon request)

Exhibit 10.1 EXECUTIVE EMPLOYMENT AGREEMENT (TIER II) This Executive Employment Agreement (this ?Agreement?) is by and between Spirit of Texas Bancshares, Inc., a Texas corporation (the ?Company?), and Allison Johnson, an individual (referred to herein as ?Executive? or ?you?), and shall be effective as of November 19, 2020 (the ?Effective Date?). Preliminary Statements Executive desires to be emp

December 2, 2021 425

Simmons First National Corporation Issues Supplemental Information Regarding Acquisition of Spirit of Texas Bancshares, Inc.

Filed by Simmons First National Corporation pursuant to Rule 425 under the Securities Act of 1933, as amended, and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934, as amended Subject Company: Spirit of Texas Bancshares, Inc.

November 24, 2021 EX-10.1

Amendment to Executive Employment Agreement by and between Spirit of Texas Bancshares, Inc. and Dean O. Bass, dated as of November 18, 2021

Exhibit 10.1 Execution Version AMENDMENT TO EXECUTIVE EMPLOYMENT AGREEMENT This Amendment (?Amendment?), effective as of November 18, 2021, by and between Spirit of Texas Bancshares, Inc., a Texas corporation (the ?Company?), and Dean O. Bass, an individual (the ?Executive?), amends that certain Executive Employment Agreement between Executive and the Company, dated as of February 2, 2021 (the ?Ag

November 24, 2021 EX-10.1

Amendment to Executive Employment Agreement by and between Spirit of Texas Bancshares, Inc. and Dean O. Bass, dated as of November 18, 2021

Exhibit 10.1 Execution Version AMENDMENT TO EXECUTIVE EMPLOYMENT AGREEMENT This Amendment (?Amendment?), effective as of November 18, 2021, by and between Spirit of Texas Bancshares, Inc., a Texas corporation (the ?Company?), and Dean O. Bass, an individual (the ?Executive?), amends that certain Executive Employment Agreement between Executive and the Company, dated as of February 2, 2021 (the ?Ag

November 24, 2021 EX-10.2

Restrictive Covenant Agreement by and between Spirit of Texas Bancshares, Inc. and Dean O. Bass, dated as of November 18, 2021

Exhibit 10.2 Execution Version RESTRICTIVE COVENANT AGREEMENT This Restrictive Covenant Agreement (this ?Agreement?), dated as of November 18, 2021 (the ?Effective Date?), is entered into by Spirit of Texas Bancshares, Inc. a Texas corporation (the ?Company?), and Dean O. Bass (?Executive?). WHEREAS, Executive is the Chief Executive Officer of the Company and its subsidiary bank, Spirit of Texas B

November 24, 2021 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): November 18, 2021 Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction of incorporation) (Co

November 24, 2021 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 18, 2021 Spirit of Texas

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 18, 2021 Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction of incorporation) (Co

November 24, 2021 EX-10.2

Restrictive Covenant Agreement by and between Spirit of Texas Bancshares, Inc. and Dean O. Bass, dated as of November 18, 2021

Exhibit 10.2 Execution Version RESTRICTIVE COVENANT AGREEMENT This Restrictive Covenant Agreement (this ?Agreement?), dated as of November 18, 2021 (the ?Effective Date?), is entered into by Spirit of Texas Bancshares, Inc. a Texas corporation (the ?Company?), and Dean O. Bass (?Executive?). WHEREAS, Executive is the Chief Executive Officer of the Company and its subsidiary bank, Spirit of Texas B

November 23, 2021 425

Frequently Asked Questions

Filed by Simmons First National Corporation pursuant to Rule 425 under the Securities Act of 1933, as amended, and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934, as amended Subject Company: Spirit of Texas Bancshares, Inc.

November 23, 2021 425

a'.1 1 Simmons .. B ank . PERSONAL h ome we lcome to s i mmo n s BUS I NESS Welcome to Simmons ABOU T OPE N A N AC CO UNT Abou t us W e hop e you ' ll t a ke so me t i me t o ge t f ami l ia r w i th th e m any pr ograms an d p er k s t ha t ma ke Si

Filed by Simmons First National Corporation pursuant to Rule 425 under the Securities Act of 1933, as amended, and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934, as amended Subject Company: Spirit of Texas Bancshares, Inc.

November 23, 2021 425

Filed by Simmons First National Corporation

Filed by Simmons First National Corporation pursuant to Rule 425 under the Securities Act of 1933, as amended, and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934, as amended Subject Company: Spirit of Texas Bancshares, Inc.

November 23, 2021 425

Filed by Simmons First National Corporation

Filed by Simmons First National Corporation pursuant to Rule 425 under the Securities Act of 1933, as amended, and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934, as amended Subject Company: Spirit of Texas Bancshares, Inc.

November 23, 2021 425

Filed by Simmons First National Corporation

Filed by Simmons First National Corporation pursuant to Rule 425 under the Securities Act of 1933, as amended, and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934, as amended Subject Company: Spirit of Texas Bancshares, Inc.

November 19, 2021 EX-99.2

Simmons First National Corporation and Spirit of Texas Bancshares, Inc. Announce Intent to Merge Transaction will significantly enhance Simmons’ scale in the Lone Star State; complement existing footprint while expanding into high-growth metro market

EXHIBIT 99.2 Simmons First National Corporation and Spirit of Texas Bancshares, Inc. Announce Intent to Merge Transaction will significantly enhance Simmons? scale in the Lone Star State; complement existing footprint while expanding into high-growth metro markets - Austin, Houston, San Antonio, Corpus Christi and Bryan-College Station PINE BLUFF, Ark. and CONROE, Texas, Nov. 19, 2021 (GLOBE NEWSW

November 19, 2021 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 18, 2021 Spirit of Texas

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 18, 2021 Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction of incorporation) (Co

November 19, 2021 425

Filed by Simmons First National Corporation

Filed by Simmons First National Corporation pursuant to Rule 425 under the Securities Act of 1933, as amended, and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934, as amended Subject Company: Spirit of Texas Bancshares, Inc.

November 19, 2021 EX-99.1

SUPPORT AND NON-COMPETITION AGREEMENT

Exhibit 99.1 SUPPORT AND NON-COMPETITION AGREEMENT This SUPPORT AND NON-COMPETITION AGREEMENT, dated as of November 18, 2021 (this ?Agreement?), by and among Simmons First National Corporation, an Arkansas corporation (?Buyer?), Spirit of Texas Bancshares, Inc. (?Seller?), a Texas corporation, and the undersigned [officer][director] (the ?Individual?) of Seller. W I T N E S S E T H: WHEREAS, concu

November 19, 2021 425

Filed by Simmons First National Corporation

Filed by Simmons First National Corporation pursuant to Rule 425 under the Securities Act of 1933, as amended, and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934, as amended Subject Company: Spirit of Texas Bancshares, Inc.

November 19, 2021 EX-2.1

Agreement and Plan of Merger, by and between Simmons First National Corporation and Spirit of Texas Bancshares, Inc., dated as of November 18, 2021*

Exhibit 2.1 Execution Version AGREEMENT AND PLAN OF MERGER BY AND BETWEEN SIMMONS FIRST NATIONAL CORPORATION AND SPIRIT OF TEXAS BANCSHARES, INC. Dated as of November 18, 2021 TABLE OF CONTENTS ARTICLE 1 TRANSACTIONS AND TERMS OF MERGER 1 1.1. Merger 1 1.2. Time and Place of Closing 2 1.3. Effective Time 2 1.4. Charter 2 1.5. Bylaws 2 1.6. Directors and Officers 2 1.7. Bank Merger 2 ARTICLE 2 MANN

November 19, 2021 EX-99.2

Simmons First National Corporation and Spirit of Texas Bancshares, Inc. Announce Intent to Merge Transaction will significantly enhance Simmons’ scale in the Lone Star State; complement existing footprint while expanding into high-growth metro market

Exhibit 99.2 November 19, 2021 Simmons First National Corporation and Spirit of Texas Bancshares, Inc. Announce Intent to Merge Transaction will significantly enhance Simmons? scale in the Lone Star State; complement existing footprint while expanding into high-growth metro markets?Austin, Houston, San Antonio, Corpus Christi and Bryan-College Station PINE BLUFF, Ark and CONROE, Texas.?Simmons Fir

November 19, 2021 EX-99.1

SUPPORT AND NON-COMPETITION AGREEMENT

Exhibit 99.1 SUPPORT AND NON-COMPETITION AGREEMENT This SUPPORT AND NON-COMPETITION AGREEMENT, dated as of November 18, 2021 (this ?Agreement?), by and among Simmons First National Corporation, an Arkansas corporation (?Buyer?), Spirit of Texas Bancshares, Inc. (?Seller?), a Texas corporation, and the undersigned [officer][director] (the ?Individual?) of Seller. W I T N E S S E T H: WHEREAS, concu

November 19, 2021 EX-2.1

Agreement and Plan of Merger, by and between Simmons First National Corporation and Spirit of Texas Bancshares, Inc., dated as of November 18, 2021*

Exhibit 2.1 Execution Version AGREEMENT AND PLAN OF MERGER BY AND BETWEEN SIMMONS FIRST NATIONAL CORPORATION AND SPIRIT OF TEXAS BANCSHARES, INC. Dated as of November 18, 2021 TABLE OF CONTENTS ARTICLE 1 TRANSACTIONS AND TERMS OF MERGER 1 1.1. Merger 1 1.2. Time and Place of Closing 2 1.3. Effective Time 2 1.4. Charter 2 1.5. Bylaws 2 1.6. Directors and Officers 2 1.7. Bank Merger 2 ARTICLE 2 MANN

November 19, 2021 EX-99.1

SUPPORT AND NON-COMPETITION AGREEMENT

Exhibit 99.1 SUPPORT AND NON-COMPETITION AGREEMENT This SUPPORT AND NON-COMPETITION AGREEMENT, dated as of November 18, 2021 (this ?Agreement?), by and among Simmons First National Corporation, an Arkansas corporation (?Buyer?), Spirit of Texas Bancshares, Inc. (?Seller?), a Texas corporation, and the undersigned [officer][director] (the ?Individual?) of Seller. W I T N E S S E T H: WHEREAS, concu

November 19, 2021 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 18, 2021 Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction of incorporation) (Co

November 19, 2021 EX-99.3

Significantly enhancing our position and scale in the Lone Star State Acquisition of Spirit of Texas Bancshares, Inc. November 19, 2021 Memphis Nashville Dallas Houston Fort Worth Austin San Antonio College Station Nasdaq: SFNC Nasdaq: STXB Disclaime

Exhibit 99.3 Significantly enhancing our position and scale in the Lone Star State Acquisition of Spirit of Texas Bancshares, Inc. November 19, 2021 Memphis Nashville Dallas Houston Fort Worth Austin San Antonio College Station Nasdaq: SFNC Nasdaq: STXB Forward - Looking Statements Certain statements contained in this presentation may not be based on historical facts and should be considered ?forw

November 19, 2021 EX-99.2

Simmons First National Corporation and Spirit of Texas Bancshares, Inc. Announce Intent to Merge Transaction will significantly enhance Simmons’ scale in the Lone Star State; complement existing footprint while expanding into high-growth metro market

Exhibit 99.2 November 19, 2021 Simmons First National Corporation and Spirit of Texas Bancshares, Inc. Announce Intent to Merge Transaction will significantly enhance Simmons? scale in the Lone Star State; complement existing footprint while expanding into high-growth metro markets?Austin, Houston, San Antonio, Corpus Christi and Bryan-College Station PINE BLUFF, Ark and CONROE, Texas.?Simmons Fir

November 19, 2021 425

Filed by Simmons First National Corporation

Filed by Simmons First National Corporation pursuant to Rule 425 under the Securities Act of 1933, as amended, and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934, as amended Subject Company: Spirit of Texas Bancshares, Inc.

November 19, 2021 425

Filed by Spirit of Texas Bancshares, Inc.

Filed by Spirit of Texas Bancshares, Inc. pursuant to Rule 425 under the Securities Act of 1933, as amended, and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934, as amended Subject Company: Spirit of Texas Bancshares, Inc. Commission File Number: 001-38484 Spirit Associate Email from Dean O. Bass Subject: Spirit of Texas Bank Announcement Attachments: 1. Press releas

November 19, 2021 425

Filed by Simmons First National Corporation

Filed by Simmons First National Corporation pursuant to Rule 425 under the Securities Act of 1933, as amended, and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934, as amended Subject Company: Spirit of Texas Bancshares, Inc.

November 19, 2021 EX-2.1

Agreement and Plan of Merger, by and between Simmons First National Corporation and Spirit of Texas Bancshares, Inc., dated as of November 18, 2021*

Exhibit 2.1 Execution Version AGREEMENT AND PLAN OF MERGER BY AND BETWEEN SIMMONS FIRST NATIONAL CORPORATION AND SPIRIT OF TEXAS BANCSHARES, INC. Dated as of November 18, 2021 TABLE OF CONTENTS ARTICLE 1 TRANSACTIONS AND TERMS OF MERGER 4 1.1. Merger. 4 1.2. Time and Place of Closing. 5 1.3. Effective Time. 5 1.4. Charter. 5 1.5. Bylaws. 5 1.6. Directors and Officers. 5 1.7. Bank Merger. 5 ARTICLE

November 19, 2021 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 18, 2021 SIMMONS FIRST N

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 18, 2021 SIMMONS FIRST NATIONAL CORPORATION (Exact name of registrant as specified in its charter) Arkansas 000-06253 71-0407808 (State or Other Jurisdiction of Incorporation

November 5, 2021 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-38484 Spirit of Texas Bancshares, Inc.

October 27, 2021 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): October 27, 2021 Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction of incorporation) (Com

October 27, 2021 EX-99.1

SPIRIT OF TEXAS BANCSHARES, INC. REPORTS THIRD QUARTER 2021 FINANCIAL RESULTS

Exhibit 99.1 Contacts: Dennard Lascar Investor Relations Ken Dennard / Natalie Hairston (713) 529-6600 [email protected] SPIRIT OF TEXAS BANCSHARES, INC. REPORTS THIRD QUARTER 2021 FINANCIAL RESULTS CONROE, TX ? October 27, 2021 ? Spirit of Texas Bancshares, Inc. (NASDAQ: STXB) (?Spirit,? the ?Company,? ?we,? ?our,? or ?us?), reported net income of $10.5 million in the third quarter of 2021,

August 20, 2021 EX-99.1

Spirit of Texas Bancshares, Inc. Increases Quarterly Cash Dividend by 33%

Exhibit 99.1 Spirit of Texas Bancshares, Inc. Increases Quarterly Cash Dividend by 33% CONROE, Texas, Aug. 20, 2021 /PRNewswire/ - Spirit of Texas Bancshares, Inc. (NASDAQ: STXB) (the "Company"), the bank holding company for Spirit of Texas Bank, today announced that on August 19, 2021 its Board of Directors increased its quarterly cash dividend for the Company's common stock by 33% to $0.12 per s

August 20, 2021 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): August 20, 2021 Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or Other Jurisdiction of Incorporation) (Comm

August 6, 2021 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-38484 Spirit of Texas Bancshares, Inc.

August 4, 2021 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 4, 2021 Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction of incorporation) (Commi

August 4, 2021 EX-99.1

Important Information ABOUT SPIRIT OF TEXAS BANCSHARES, INC. Spirit of Texas Bancshares, Inc. (“Spirit,” “STXB,” “Company,” “we,” “our” or “us”), through its wholly-owned subsidiary, Spirit of Texas Bank, SSB (the “Bank”), provides a wide range of re

Spirit of Texas Bancshares, Inc. KBW Community Bank Investor Conference August 4-5, 2021 Exhibit 99.1 Important Information ABOUT SPIRIT OF TEXAS BANCSHARES, INC. Spirit of Texas Bancshares, Inc. (?Spirit,? ?STXB,? ?Company,? ?we,? ?our? or ?us?), through its wholly-owned subsidiary, Spirit of Texas Bank, SSB (the ?Bank?), provides a wide range of relationship-driven commercial banking products an

July 21, 2021 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): July 21, 2021 Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction of incorporation) (Commis

July 21, 2021 EX-99.1

SPIRIT OF TEXAS BANCSHARES, INC. REPORTS SECOND QUARTER 2021 FINANCIAL RESULTS

Exhibit 99.1 News RELEASE Contacts:??Dennard Lascar Investor Relations ??????Ken Dennard / Natalie Hairston ??????(713) 529-6600 [email protected] SPIRIT OF TEXAS BANCSHARES, INC. REPORTS SECOND QUARTER 2021 FINANCIAL RESULTS CONROE, TX ? July 21, 2021 ? Spirit of Texas Bancshares, Inc. (NASDAQ: STXB) (?Spirit,? the ?Company,? ?we,? ?our,? or ?us?) reported net income of $12.4 million i

June 16, 2021 EX-10.1

Executive Employment Agreement, dated June 10, 2021, by and between Spirit of Texas Bancshares, Inc. and Jerry Golemon (schedules and exhibits have been omitted pursuant to Item 601(a)(5) of Regulation S-K and will be provided to the Securities and Exchange Commission upon request)

Exhibit 10.1 EXECUTIVE EMPLOYMENT AGREEMENT (TIER II) This Executive Employment Agreement (this ?Agreement?) is by and between Spirit of Texas Bancshares, Inc., a Texas corporation (the ?Company?), and Jerry Golemon, an individual (referred to herein as ?Executive? or ?you?), and shall be effective as of June 10, 2021 (the ?Effective Date?). Preliminary Statements Executive desires to be employed

June 16, 2021 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): June 16, 2021 (June 10, 2021) Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction of incorp

June 15, 2021 8-K

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

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 15, 2021 Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction of incorporation) (Commis

May 28, 2021 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 28, 2021 (May 27, 2021) Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction of incorpor

May 18, 2021 EX-99.1

Important Information ABOUT SPIRIT OF TEXAS BANCSHARES, INC. Spirit of Texas Bancshares, Inc. (“Spirit,” “STXB,” “Company,” “we,” “our” or “us”), through its wholly-owned subsidiary, Spirit of Texas Bank (the “Bank”), provides a wide range of relatio

Spirit of Texas Bancshares, Inc. 2021 Virtual KBW Texas Field Trip May 18, 2021 Exhibit 99.1 Important Information ABOUT SPIRIT OF TEXAS BANCSHARES, INC. Spirit of Texas Bancshares, Inc. (?Spirit,? ?STXB,? ?Company,? ?we,? ?our? or ?us?), through its wholly-owned subsidiary, Spirit of Texas Bank (the ?Bank?), provides a wide range of relationship-driven commercial banking products and services tai

May 18, 2021 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 18, 2021 Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction of incorporation) (Commiss

May 3, 2021 EX-99.1

Important Information ABOUT SPIRIT OF TEXAS BANCSHARES, INC. Spirit of Texas Bancshares, Inc. (“Spirit,” “STXB,” “Company,” “we,” “our” or “us”), through its wholly-owned subsidiary, Spirit of Texas Bank (the “Bank”), provides a wide range of relatio

Spirit of Texas Bancshares, Inc. Gulf South Bank Conference May 3-4, 2021 Exhibit 99.1 Important Information ABOUT SPIRIT OF TEXAS BANCSHARES, INC. Spirit of Texas Bancshares, Inc. (?Spirit,? ?STXB,? ?Company,? ?we,? ?our? or ?us?), through its wholly-owned subsidiary, Spirit of Texas Bank (the ?Bank?), provides a wide range of relationship-driven commercial banking products and services tailored

May 3, 2021 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 3, 2021 Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction of incorporation) (Commissi

April 30, 2021 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-38484 Spirit of Texas Bancshares, Inc.

April 21, 2021 EX-99.1

SPIRIT OF TEXAS BANCSHARES, INC. REPORTS FIRST QUARTER 2021 FINANCIAL RESULTS

Exhibit 99.1 NEWS RELEASE Contacts: Dennard Lascar Investor Relations Ken Dennard / Natalie Hairston (713) 529-6600 [email protected] SPIRIT OF TEXAS BANCSHARES, INC. REPORTS FIRST QUARTER 2021 FINANCIAL RESULTS CONROE, TX ? April 21, 2021 ? Spirit of Texas Bancshares, Inc. (NASDAQ: STXB) (?Spirit,? the ?Company,? ?we,? ?our,? or ?us?), reported net income of $10.1 million in the first quarte

April 21, 2021 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): April 21, 2021 Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction of incorporation) (Commi

April 9, 2021 DEF 14A

- DEF 14A

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

April 9, 2021 DEFA14A

- DEFA14A

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

March 16, 2021 EX-99.1

SPIRIT OF TEXAS BANCSHARES, INC. DECLARES QUARTERLY CASH DIVIDEND

EX-99.1 Exhibit 99.1 News Release Contacts: Dennard Lascar Investor Relations Ken Dennard / Natalie Hairston (713) 529-6600 [email protected] SPIRIT OF TEXAS BANCSHARES, INC. DECLARES QUARTERLY CASH DIVIDEND CONROE, TX – March 15, 2021 – Spirit of Texas Bancshares, Inc. (NASDAQ: STXB) (the “Company”), the bank holding company for Spirit of Texas Bank, today announced that on March 12, 2021 it

March 16, 2021 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): March 16, 2021 (March 12, 2021) Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction of inco

March 5, 2021 EX-21.1

List of Subsidiaries of Spirit of Texas Bancshares, Inc.

Exhibit 21.1 Subsidiaries of Spirit of Texas Bancshares, Inc. Entity Name State of Incorporation Spirit of Texas Bank, SSB Texas

March 5, 2021 EX-4.3

Description of Registrant’s Common Stock

Exhibit 4.3 DESCRIPTION OF THE COMPANY?S COMMON STOCK REGISTERED UNDER SECTION 12 OF THE EXCHANGE ACT OF 1934 The following summary describes the material features and rights of the shares of common stock (the ?common stock?) of Spirit of Texas Bancshares, Inc. (referred to herein as the ?Company,? ?our,? ?us,? or ?we?). This summary does not purport to be a complete description of the terms and c

March 5, 2021 10-K

Annual Report - 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ? ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2020 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission File Number 001-38484 Spirit of Texas

March 2, 2021 EX-99.1

Important Information ABOUT SPIRIT OF TEXAS BANCSHARES, INC. Spirit of Texas Bancshares, Inc. (“Spirit,” “STXB,” “Company,” “we,” “our” or “us”), through its wholly-owned subsidiary, Spirit of Texas Bank (the “Bank”), provides a wide range of relatio

Spirit of Texas Bancshares, Inc. Western Financial Services Conference March 2, 2021 Exhibit 99.1 Important Information ABOUT SPIRIT OF TEXAS BANCSHARES, INC. Spirit of Texas Bancshares, Inc. (?Spirit,? ?STXB,? ?Company,? ?we,? ?our? or ?us?), through its wholly-owned subsidiary, Spirit of Texas Bank (the ?Bank?), provides a wide range of relationship-driven commercial banking products and service

March 2, 2021 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 2, 2021 Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction of incorporation) (Commis

February 26, 2021 8-K/A

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/A (Amendment No. 1) CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 26, 2021 (November 19, 2020) Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or

February 26, 2021 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): February 26, 2021 (February 25, 2021) Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction o

February 26, 2021 EX-10.1

Employment Agreement, dated February 25, 2021, by and

Exhibit 10.1 EXECUTIVE EMPLOYMENT AGREEMENT This Executive Employment Agreement (this ?Agreement?) is by and between Spirit of Texas Bancshares, Inc., a Texas corporation (the ?Company?), and Dean O. Bass, an individual (referred to herein as ?Executive? or ?you?), and shall be effective as of February 2, 2021 (the ?Effective Date?). Preliminary Statements Executive and the Company previously ente

February 26, 2021 EX-10.1

Employment Agreement, dated February 22, 2021, by and

Exhibit 10.1 EXECUTIVE EMPLOYMENT AGREEMENT This Executive Employment Agreement (this ?Agreement?) is by and between Spirit of Texas Bancshares, Inc., a Texas corporation (the ?Company?), and Allison Johnson, an individual (referred to herein as ?Executive? or ?you?), and shall be effective as of November 19, 2020 (the ?Effective Date?). Preliminary Statements Executive desires to be employed by t

February 26, 2021 EX-10.2

Employment Agreement, dated February 25, 2021, by and

Exhibit 10.2 EXECUTIVE EMPLOYMENT AGREEMENT This Executive Employment Agreement (this ?Agreement?) is by and between Spirit of Texas Bancshares, Inc., a Texas corporation (the ?Company?), and David M. McGuire, an individual (referred to herein as ?Executive? or ?you?), and shall be effective as of February 2, 2021 (the ?Effective Date?). Preliminary Statements Executive and the Company previously

February 12, 2021 SC 13G/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 2)* Spirit of Texas Bancshares, Inc.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No.

February 3, 2021 EX-99.1

Important Information ABOUT SPIRIT OF TEXAS BANCSHARES, INC. Spirit of Texas Bancshares, Inc. (“Spirit,” “STXB,” “Company,” “we,” “our” or “us”), through its wholly‐owned subsidiary, Spirit of Texas Bank (the “Bank”), provides a wide range of relatio

EX-99.1 Exhibit 99.1 Spirit of Texas Bancshares, Inc. Stephens Texas Bank Field Trip 2021 February 3, 2021 1 SPIRIT SPIRIT OF OF TEXAS TEXASExhibit 99.1 Spirit of Texas Bancshares, Inc. Stephens Texas Bank Field Trip 2021 February 3, 2021 1 SPIRIT SPIRIT OF OF TEXAS TEXAS Important Information ABOUT SPIRIT OF TEXAS BANCSHARES, INC. Spirit of Texas Bancshares, Inc. (“Spirit,” “STXB,” “Company,” “we

February 3, 2021 8-K

Regulation FD Disclosure, 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): February 3, 2021 Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction of incorporation) (Com

January 25, 2021 EX-99.1

SPIRIT OF TEXAS BANCSHARES, INC. REPORTS RECORD FOURTH QUARTER 2020 FINANCIAL RESULTS

EX-99.1 Exhibit 99.1 Contacts: Dennard Lascar Investor Relations Ken Dennard / Natalie Hairston (713) 529-6600 [email protected] SPIRIT OF TEXAS BANCSHARES, INC. REPORTS RECORD FOURTH QUARTER 2020 FINANCIAL RESULTS CONROE, TX – January 25, 2021 – Spirit of Texas Bancshares, Inc. (NASDAQ: STXB) (“Spirit”, the “Company”, “we”, “our”, or “us”), reported net income of $12.5 million in the fourth

January 25, 2021 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): January 25, 2021 Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction of incorporation) (Com

January 11, 2021 EX-99.1

SPIRIT OF TEXAS BANCSHARES, INC. COMPLETES SALE OF JACKSBORO BRANCH LOCATION

EX-99.1 Exhibit 99.1 Contacts: Dennard Lascar Investor Relations Ken Dennard / Natalie Hairston (713) 529-6600 [email protected] SPIRIT OF TEXAS BANCSHARES, INC. COMPLETES SALE OF JACKSBORO BRANCH LOCATION CONROE, TEXAS – January 11, 2021 – Spirit of Texas Bancshares, Inc. (NASDAQ: STXB) (“Spirit”), the holding company for Spirit of Texas Bank (the “Bank”), today announced that on January 8,

January 11, 2021 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): January 11, 2021 (January 8, 2021) Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction of i

December 22, 2020 SC 13D

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. )* Spirit of Texas Bancshares, Inc. (Name of Issuer) Common Stock, no par value per share (Title of Class of Securities) (

SC 13D SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. )* Spirit of Texas Bancshares, Inc. (Name of Issuer) Common Stock, no par value per share (Title of Class of Securities) 84861D103 (CUSIP Number) Steven Gregory Kidd 2160 Fawnwood Drive Plano, Texas 75093 (903) 570-5623 (Name, Address and Telephone Number of Person

December 22, 2020 SC 13D/A

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D/A Under the Securities Exchange Act of 1934 (Amendment No. 1)* Spirit of Texas Bancshares, Inc. (Name of Issuer) Common Stock, no par value per share (Title of Class of Securities

SC 13D/A SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D/A Under the Securities Exchange Act of 1934 (Amendment No. 1)* Spirit of Texas Bancshares, Inc. (Name of Issuer) Common Stock, no par value per share (Title of Class of Securities) 84861D103 (CUSIP Number) Steven Gregory Kidd General Partner Kidd Partners, Ltd. 2160 Fawnwood Drive Plano, Texas 75093 (903) 570-5623 (Nam

December 22, 2020 EX-99.1

JOINT FILING AGREEMENT

EX-99.1 EXHIBIT 99.1 JOINT FILING AGREEMENT This Agreement is made pursuant to Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), by and among the parties listed below, each referred to herein as a “Joint Filer.” The Joint Filers agree that a statement of beneficial ownership as required by Section 13(d) of the Exchange Act and the rules thereunder may be

December 18, 2020 EX-99.1

SPIRIT OF TEXAS BANCSHARES, INC. DECLARES INCREASED QUARTERLY CASH DIVIDEND

EX-99.1 Exhibit 99.1 Contacts: NEWS RELEASE Dennard Lascar Investor Relations Ken Dennard / Natalie Hairston (713) 529-6600 [email protected] FOR IMMEDIATE RELEASE SPIRIT OF TEXAS BANCSHARES, INC. DECLARES INCREASED QUARTERLY CASH DIVIDEND CONROE, TX – December 18, 2020 – Spirit of Texas Bancshares, Inc. (NASDAQ: STXB) (the “Company”), the bank holding company for Spirit of Texas Bank, today

December 18, 2020 8-K

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): December 18, 2020 (December 17, 2020) Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction o

November 23, 2020 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 23, 2020 (November 19, 2020) Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction o

November 23, 2020 EX-99.1

SPIRIT OF TEXAS BANCSHARES, INC. NAMES ALLISON S. JOHNSON CHIEF FINANCIAL OFFICER

EX-99.1 Exhibit 99.1 NEWS RELEASE Contacts: Dennard Lascar Investor Relations Ken Dennard / Natalie Hairston (713) 529-6600 [email protected] SPIRIT OF TEXAS BANCSHARES, INC. NAMES ALLISON S. JOHNSON CHIEF FINANCIAL OFFICER CONROE, TX – November 23, 2020 – Spirit of Texas Bancshares, Inc. (NASDAQ: STXB) (the “Company”), the bank holding company for Spirit of Texas Bank, announced that on Nove

November 5, 2020 EX-99.1

Important Information ABOUT SPIRIT OF TEXAS BANCSHARES, INC. Spirit of Texas Bancshares, Inc. (“Spirit,” “STXB,” “Company,” “we,” “our” or “us”), through its wholly-owned subsidiary, Spirit of Texas Bank (the “Bank”), provides a wide range of relatio

EX-99.1 Spirit of Texas Bancshares, Inc. Raymond James Texas Virtual Bank Tour 2020 November 5, 2020 Exhibit 99.1 Important Information ABOUT SPIRIT OF TEXAS BANCSHARES, INC. Spirit of Texas Bancshares, Inc. (“Spirit,” “STXB,” “Company,” “we,” “our” or “us”), through its wholly-owned subsidiary, Spirit of Texas Bank (the “Bank”), provides a wide range of relationship-driven commercial banking prod

November 5, 2020 8-K

Regulation FD Disclosure, 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): November 5, 2020 Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction of incorporation) (Com

October 30, 2020 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2020 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-38484 Spirit of Texas Bancshares, Inc.

October 21, 2020 EX-99.1

SPIRIT OF TEXAS BANCSHARES, INC. REPORTS STRONG THIRD QUARTER 2020 FINANCIAL RESULTS

EX-99.1 Exhibit 99.1 NEWS RELEASE Contacts: Dennard Lascar Investor Relations Ken Dennard / Natalie Hairston (713) 529-6600 [email protected] SPIRIT OF TEXAS BANCSHARES, INC. REPORTS STRONG THIRD QUARTER 2020 FINANCIAL RESULTS CONROE, TX – October 20, 2020 – Spirit of Texas Bancshares, Inc. (NASDAQ: STXB) (“Spirit”, the “Company”, “we”, “our”, or “us”), reported net income of $7.1 million in

October 21, 2020 8-K/A

Financial Statements and Exhibits, Results of Operations and Financial Condition - 8-K/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A (Amendment No. 1) CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 21, 2020 (October 20, 2020) Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or ot

October 20, 2020 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): October 20, 2020 Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction of incorporation) (Com

October 20, 2020 EX-99.1

SPIRIT OF TEXAS BANCSHARES, INC. REPORTS STRONG THIRD QUARTER 2020 FINANCIAL RESULTS

EX-99.1 Exhibit 99.1 NEWS RELEASE Contacts: Dennard Lascar Investor Relations Ken Dennard / Natalie Hairston (713) 529-6600 [email protected] SPIRIT OF TEXAS BANCSHARES, INC. REPORTS STRONG THIRD QUARTER 2020 FINANCIAL RESULTS CONROE, TX – October 20, 2020 – Spirit of Texas Bancshares, Inc. (NASDAQ: STXB) (“Spirit”, the “Company”, “we”, “our”, or “us”), reported net income of $7.1 million in

September 24, 2020 EX-99.1

SPIRIT OF TEXAS BANCSHARES, INC. DECLARES ITS FIRST QUARTERLY CASH DIVIDEND

EX-99.1 Exhibit 99.1 FOR IMMEDIATE RELEASE NEWS RELEASE Contacts: Dennard Lascar Investor Relations Ken Dennard / Natalie Hairston (713) 529-6600 [email protected] SPIRIT OF TEXAS BANCSHARES, INC. DECLARES ITS FIRST QUARTERLY CASH DIVIDEND CONROE, TX – September 24, 2020 – Spirit of Texas Bancshares, Inc. (NASDAQ: STXB) (the “Company”), the bank holding company for Spirit of Texas Bank, today

September 24, 2020 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): September 24, 2020 Spirit of Texa

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 24, 2020 Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction of incorporation) (C

September 17, 2020 EX-99.1

Important Information ABOUT SPIRIT OF TEXAS BANCSHARES, INC. Spirit of Texas Bancshares, Inc. (“Spirit,” “STXB,” “Company,” “we,” “our” or “us”), through its wholly-owned subsidiary, Spirit of Texas Bank (the “Bank”), provides a wide range of relatio

EX-99.1 Spirit of Texas Bancshares, Inc. Stephens’ 10th Annual Bank Forum September 22, 2020 Exhibit 99.1 Important Information ABOUT SPIRIT OF TEXAS BANCSHARES, INC. Spirit of Texas Bancshares, Inc. (“Spirit,” “STXB,” “Company,” “we,” “our” or “us”), through its wholly-owned subsidiary, Spirit of Texas Bank (the “Bank”), provides a wide range of relationship-driven commercial banking products and

September 17, 2020 8-K

Regulation FD Disclosure, 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): September 17, 2020 Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction of incorporation) (C

August 7, 2020 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2020 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-38484 Spirit of Texas Bancshares, Inc.

July 31, 2020 8-K/A

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A (Amendment No. 1) CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 31, 2020 (July 20, 2020) Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other ju

July 31, 2020 EX-99.2

SPIRIT OF TEXAS BANCSHARES, INC. ANNOUNCES SALE OF ITS CLEAR LAKE BRANCH

EX-99.2 Exhibit 99.2 FOR IMMEDIATE RELEASE Contacts: Dennard Lascar Investor Relations Ken Dennard / Natalie Hairston (713) 529-6600 [email protected] SPIRIT OF TEXAS BANCSHARES, INC. ANNOUNCES SALE OF ITS CLEAR LAKE BRANCH CONROE, TEXAS – July 20, 2020 – Spirit of Texas Bancshares, Inc. (NASDAQ: STXB) (the “Company” or “Spirit”), the holding company for Spirit of Texas Bank (the “Bank”), tod

July 31, 2020 EX-99.1

SPIRIT OF TEXAS BANCSHARES, INC. REPORTS SECOND QUARTER 2020 FINANCIAL RESULTS

EX-99.1 Exhibit 99.1 NEWS RELEASE Contacts: Dennard Lascar Investor Relations Ken Dennard / Natalie Hairston (713) 529-6600 [email protected] SPIRIT OF TEXAS BANCSHARES, INC. REPORTS SECOND QUARTER 2020 FINANCIAL RESULTS CONROE, TX – July 20, 2020 – Spirit of Texas Bancshares, Inc. (NASDAQ: STXB) (“Spirit”, the “Company”, “we”, “our”, or “us”), reported net income of $7.7 million in the secon

July 29, 2020 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 29, 2020 Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction of incorporation) (Commis

July 29, 2020 EX-99.1

Important Information ABOUT SPIRIT OF TEXAS BANCSHARES, INC. Spirit of Texas Bancshares, Inc. (“Spirit,” “STXB,” “Company,” “we,” “our” or “us”), through its wholly-owned subsidiary, Spirit of Texas Bank (the “Bank”), provides a wide range of relatio

EX-99.1 Spirit of Texas Bancshares, Inc. Virtual 21st Annual KBW Community Bank Conference July 29, 2020 Exhibit 99.1 Important Information ABOUT SPIRIT OF TEXAS BANCSHARES, INC. Spirit of Texas Bancshares, Inc. (“Spirit,” “STXB,” “Company,” “we,” “our” or “us”), through its wholly-owned subsidiary, Spirit of Texas Bank (the “Bank”), provides a wide range of relationship-driven commercial banking

July 27, 2020 EX-99.2

Disclaimer This presentation contains, and future oral and written statements of Spirit of Texas Bancshares, Inc. (“STXB,” “the Company,” “we,” “us” or “our”) and its management may contain, forward-looking statements within the meaning of Section 27

EX-99.2 Spirit of Texas Bancshares, Inc. Subordinated Debt Issuance July 6, 2020 Exhibit 99.2 Disclaimer This presentation contains, and future oral and written statements of Spirit of Texas Bancshares, Inc. (“STXB,” “the Company,” “we,” “us” or “our”) and its management may contain, forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section

July 27, 2020 8-K

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 27, 2020 (July 24, 2020) Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction of incorp

July 27, 2020 EX-10.1

Form of Subordinated Note Purchase Agreement, dated as of July 24, 2020, by and between Spirit of Texas Bancshares, Inc. and each of the Purchasers (incorporated herein by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K filed with the SEC on July 27, 2020 (File No. 001-38484) (certain schedules (or similar attachments) have been omitted pursuant to Item 601(a)(5) of Regulation S-K; however the Company hereby undertakes to furnish copies of any of the omitted schedules upon request by the SEC; provided, however, that the Company may request confidential treatment pursuant to Rule 24b-2 of the Exchange Act for any schedules so furnished)

EX-10.1 Exhibit 10.1 FORM OF SUBORDINATED NOTE PURCHASE AGREEMENT This SUBORDINATED NOTE PURCHASE AGREEMENT (this “Agreement”) is dated as of July 24, 2020, and is made by and between Spirit of Texas Bancshares, Inc., a Texas corporation (the “Company”), and the purchaser of the Subordinated Note (as defined herein) identified on the signature page hereto (the “Purchaser” and, together with the se

July 27, 2020 EX-99.1

SPIRIT OF TEXAS BANCSHARES, INC. ANNOUNCES PRIVATE PLACEMENT OF FIXED TO FLOATING RATE SUBORDINATED NOTES

EX-99.1 Exhibit 99.1 FOR IMMEDIATE RELEASE NEWS RELEASE Contacts:   Dennard Lascar Investor Relations Ken Dennard / Natalie Hairston (713) 529-6600 [email protected] SPIRIT OF TEXAS BANCSHARES, INC. ANNOUNCES PRIVATE PLACEMENT OF FIXED TO FLOATING RATE SUBORDINATED NOTES CONROE, TEXAS – July 27, 2020 – Spirit of Texas Bancshares, Inc. (NASDAQ: STXB) (the “Company” or “Spirit”), the holding co

July 20, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition, 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): July 20, 2020 Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction of incorporation) (Commis

July 20, 2020 EX-99.2

SPIRIT OF TEXAS BANCSHARES, INC. ANNOUNCES SALE OF ITS CLEAR LAKE BRANCH

EX-99.2 Exhibit 99.2 FOR IMMEDIATE RELEASE Contacts: Dennard Lascar Investor Relations Ken Dennard / Natalie Hairston (713) 529-6600 [email protected] SPIRIT OF TEXAS BANCSHARES, INC. ANNOUNCES SALE OF ITS CLEAR LAKE BRANCH CONROE, TEXAS – July 20, 2020 – Spirit of Texas Bancshares, Inc. (NASDAQ: STXB) (the “Company” or “Spirit”), the holding company for Spirit of Texas Bank (the “Bank”), tod

July 20, 2020 EX-99.1

SPIRIT OF TEXAS BANCSHARES, INC. REPORTS SECOND QUARTER 2020 FINANCIAL RESULTS

EX-99.1 Exhibit 99.1 NEWS RELEASE Contacts: Dennard Lascar Investor Relations Ken Dennard / Natalie Hairston (713) 529-6600 [email protected] SPIRIT OF TEXAS BANCSHARES, INC. REPORTS SECOND QUARTER 2020 FINANCIAL RESULTS CONROE, TX – July 20, 2020 – Spirit of Texas Bancshares, Inc. (NASDAQ: STXB) (“Spirit”, the “Company”, “we”, “our”, or “us”), reported net income of $7.7 million in the secon

June 15, 2020 EX-99.1

SPIRIT OF TEXAS BANCSHARES, INC. ANNOUNCES AMENDMENT TO STOCK BUYBACK PROGRAM

EX-99.1 Exhibit 99.1 NEWS RELEASE Contacts:  Dennard Lascar Investor Relations       Ken Dennard / Natalie Hairston       (713) 529-6600       [email protected] SPIRIT OF TEXAS BANCSHARES, INC. ANNOUNCES AMENDMENT TO STOCK BUYBACK PROGRAM CONROE, TX – June 15, 2020 – Spirit of Texas Bancshares, Inc. (NASDAQ: STXB) (the “Company”), the parent company of Spirit of Texas Bank, today announced an

June 15, 2020 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): June 15, 2020 Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction of incorporation) (Commis

May 29, 2020 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 29, 2020 (May 28, 2020) Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction of incorpor

May 15, 2020 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2020 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-38484 Spirit of Texas Bancshares, Inc.

May 13, 2020 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 13, 2020 Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction of incorporation) (Commiss

May 13, 2020 EX-99.1

Important Information ABOUT SPIRIT OF TEXAS BANCSHARES, INC. Spirit of Texas Bancshares, Inc. (“Spirit,” “STXB” or the “Company”), through its wholly-owned subsidiary, Spirit of Texas Bank (the “Bank”), provides a wide range of relationship-driven co

EX-99.1 Spirit of Texas Bancshares, Inc. 2020 Virtual KBW Texas Field Trip May 13, 2020 Exhibit 99.1 Important Information ABOUT SPIRIT OF TEXAS BANCSHARES, INC. Spirit of Texas Bancshares, Inc. (“Spirit,” “STXB” or the “Company”), through its wholly-owned subsidiary, Spirit of Texas Bank (the “Bank”), provides a wide range of relationship-driven commercial banking products and services tailored t

May 11, 2020 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): May 11, 2020 Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction of incorporation) (Commiss

April 30, 2020 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): April 29, 2020 Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or Other Jurisdiction of Incorporation) (Commi

April 30, 2020 EX-99.1

Spirit of Texas Bancshares, Inc. Reports First Quarter 2020 Financial Results

Exhibit 99.1 Spirit of Texas Bancshares, Inc. Reports First Quarter 2020 Financial Results CONROE, Texas, April 29, 2020 /PRNewswire/ - Spirit of Texas Bancshares, Inc. (NASDAQ: STXB) ("Spirit" or the "Company"), reported net income of $4.1 million in the first quarter of 2020 representing diluted earnings per share of $0.22, compared to net income of $3.8 million in the first quarter of 2019, rep

April 16, 2020 DEF 14A

STXB / Spirit of Texas Bancshares, Inc. DEF 14A - - DEF 14A

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

April 16, 2020 DEFA14A

STXB / Spirit of Texas Bancshares, Inc. DEFA14A - - DEFA14A

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

April 14, 2020 8-K

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

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 14, 2020 (April 13, 2020) Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas (State or other jurisdiction of incorporation) 001-38484

April 7, 2020 EX-99.1

To: All Employees of Spirit of Texas Bank SSB

Exhibit 99.1 To: All Employees of Spirit of Texas Bank SSB From: David M. McGuire Date: April 7, 2020 To All Employees, The Executive Team wants to make you aware that Mr. Dean O. Bass, our Chairman/CEO, has taken a temporary medical leave of absence due to exposure to the Covid-19 virus. Mr. David McGuire, our President/Chief Lending Officer, has assumed the responsibilities of interim CEO of the

April 7, 2020 8-K

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 7, 2020 (April 6, 2020) Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas (State or other jurisdiction of incorporation) 001-38484 (C

March 16, 2020 EX-21.1

List of Subsidiaries of Spirit of Texas Bancshares, Inc.

Exhibit 21.1 Subsidiaries of Spirit of Texas Bancshares, Inc. Entity Name State of Incorporation Spirit of Texas Bank, SSB Texas

March 16, 2020 EX-4.3

Description of Registrant’s Common Stock

Exhibit 4.3 DESCRIPTION OF THE COMPANY’S COMMON STOCK REGISTERED UNDER SECTION 12 OF THE EXCHANGE ACT OF 1934 The following summary describes the material features and rights of the shares of common stock (the “common stock”) of Spirit of Texas Bancshares, Inc. (referred to herein as the “Company,” “our,” “us,” or “we”). This summary does not purport to be a complete description of the terms and c

March 16, 2020 10-K

Annual Report - 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2019 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission File Number 001-38484 Spirit of Texas

March 2, 2020 EX-99.1

SPIRIT OF TEXAS BANCSHARES, INC. COMPLETES ACQUISITION OF FIVE SIMMONS BANK LOCATIONS

EX-99.1 Exhibit 99.1 News Release Contacts: Dennard Lascar Investor Relations Ken Dennard / Natalie Hairston (713) 529-6600 [email protected] FOR IMMEDIATE RELEASE SPIRIT OF TEXAS BANCSHARES, INC. COMPLETES ACQUISITION OF FIVE SIMMONS BANK LOCATIONS CONROE, TEXAS – March 2, 2020 – On February 28, 2020, Spirit of Texas Bancshares, Inc. (NASDAQ: STXB) (“Spirit”), the holding company for Spirit

March 2, 2020 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): March 2, 2020 (February 28, 2020) Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction of in

February 14, 2020 SC 13G/A

STXB / Spirit of Texas Bancshares, Inc. / RMB Capital Management, LLC - 13G/A Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No.

February 13, 2020 SC 13G/A

STXB / Spirit of Texas Bancshares, Inc. / FJ Capital Management LLC Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2) * Spirit of Texas Bancshares (STXB) (Name of Issuer) Common Stock (Title of Class of Securities) 84861D103 (CUSIP Number) 12/31/2019 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which

February 3, 2020 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 3, 2020 Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction of incorporation) (Com

February 3, 2020 EX-99.1

Important Information ABOUT SPIRIT OF TEXAS BANCSHARES, INC. Spirit of Texas Bancshares, Inc. (“Spirit,” “STXB” or the “Company”), through its wholly-owned subsidiary, Spirit of Texas Bank (the “Bank”), provides a wide range of relationship-driven co

EX-99.1 Spirit of Texas Bancshares, Inc. Stephens Inc. Regional Banks Investor Trip February 3, 2020 Exhibit 99.1 Important Information ABOUT SPIRIT OF TEXAS BANCSHARES, INC. Spirit of Texas Bancshares, Inc. (“Spirit,” “STXB” or the “Company”), through its wholly-owned subsidiary, Spirit of Texas Bank (the “Bank”), provides a wide range of relationship-driven commercial banking products and servic

January 30, 2020 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): January 29, 2020 Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or Other Jurisdiction of Incorporation) (Com

January 30, 2020 EX-99.1

Spirit Of Texas Bancshares, Inc. Reports Fourth Quarter 2019 Financial Results

EX-99.1 Exhibit 99.1 Spirit Of Texas Bancshares, Inc. Reports Fourth Quarter 2019 Financial Results Organic loan growth of $35.9 million for the quarter CONROE, Texas, Jan. 29, 2020 /PRNewswire/ — Spirit of Texas Bancshares, Inc. (NASDAQ: STXB) (“Spirit” or the “Company”), reported net income of $6.2 million in the fourth quarter of 2019 representing diluted earnings per share of $0.35. Net income

January 15, 2020 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): January 14, 2020 Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction of incorporation) (Com

January 15, 2020 EX-99.3

UNAUDITED PRO FORMA COMBINED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

EX-99.3 Exhibit 99.3 UNAUDITED PRO FORMA COMBINED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS The following unaudited pro forma combined condensed consolidated balance sheet as of September 30, 2019 and the unaudited pro forma combined condensed consolidated statements of income for the nine months ended September 30, 2019 and the year ended December 31, 2018 have been prepared to show the impact

January 15, 2020 EX-99.2

CHANDLER BANCORP, INC. AND SUBSIDIARIES Condensed Consolidated Balance Sheets September 30, 2019 and December 31, 2018 (In thousands of dollars, except for share amounts) September 30, 2019 (Unaudited) December 31, 2018 ASSETS Cash and cash equivalen

EX-99.2 Exhibit 99.2 CHANDLER BANCORP, INC. AND SUBSIDIARIES Condensed Consolidated Financial Statements September 30, 2019 CHANDLER BANCORP, INC. AND SUBSIDIARIES Condensed Consolidated Balance Sheets September 30, 2019 and December 31, 2018 (In thousands of dollars, except for share amounts) September 30, 2019 (Unaudited) December 31, 2018 ASSETS Cash and cash equivalents $ 77,125 $ 46,111 Loans

January 15, 2020 EX-99.1

SPIRIT OF TEXAS BANCSHARES, INC. ANNOUNCES PASSING OF CHIEF FINANCIAL OFFICER JEFFERY A. POWELL

EX-99.1 Exhibit 99.1 NEWS RELEASE Contacts: Dennard Lascar Investor Relations Ken Dennard / Natalie Hairston (713) 529-6600 [email protected] SPIRIT OF TEXAS BANCSHARES, INC. ANNOUNCES PASSING OF CHIEF FINANCIAL OFFICER JEFFERY A. POWELL CONROE, TX – January 14, 2020 – Spirit of Texas Bancshares, Inc. (NASDAQ: STXB) (the “Company”), the bank holding company for Spirit of Texas Bank, announced

January 15, 2020 EX-99.1

CHANDLER BANCORP, INC. AND SUBSIDIARIES Consolidated Financial Statements December 31, 2018 and 2017 (With Independent Auditor’s Report Thereon)

EX-99.1 Exhibit 99.1 CHANDLER BANCORP, INC. AND SUBSIDIARIES Consolidated Financial Statements December 31, 2018 and 2017 (With Independent Auditor’s Report Thereon) Independent Auditor’s Report The Board of Directors Chandler Bancorp, Inc. and Subsidiaries We have audited the accompanying consolidated financial statements of Chandler Bancorp, Inc. and Subsidiaries (Company), which comprise the co

January 15, 2020 8-K/A

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

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): January 15, 2020 (November 5, 2019) Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction o

December 23, 2019 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): December 23, 2019 (December 20, 2019) Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction o

December 23, 2019 EX-2.1

Branch Purchase and Assumption Agreement, dated as of December 20, 2019, by and between Spirit of Texas Bank, SSB and Simmons Bank (incorporated herein by reference to Exhibit 2.1 to Current Report on Form 8-K filed with the SEC on December 23, 2019 (File No. 001-38484)) (schedules and exhibits have been omitted pursuant to Item 601(a)(5) of Regulation S-K; however, the registrant hereby agrees to furnish a copy of any omitted schedule or similar attachment to the SEC upon request).

EX-2.1 Exhibit 2.1 Execution Version BRANCH PURCHASE AND ASSUMPTION AGREEMENT by and between SPIRIT OF TEXAS BANK, SSB College Station, Texas and SIMMONS BANK Pine Bluff, Arkansas Dated as of December 20, 2019 TABLE OF CONTENTS Page ARTICLE I. SALE AND PURCHASE OF CERTAIN ASSETS AND ASSUMPTION AND TRANSFER OF CERTAIN LIABILITIES 1 Section 1.1 Sale of Assets 1 Section 1.2 Assets to be Retained by S

December 23, 2019 EX-99.1

SPIRIT OF TEXAS BANK AGREES TO ACQUIRE DEPOSITS, LOANS AND OTHER ASSETS OF FIVE SIMMONS BANK LOCATIONS IN KEY TEXAS MARKETS

EX-99.1 Exhibit 99.1 NEWS RELEASE FOR IMMEDIATE RELEASE Contacts: Dennard Lascar Investor Relations Ken Dennard / Natalie Hairston (713) 529-6600 [email protected] SPIRIT OF TEXAS BANK AGREES TO ACQUIRE DEPOSITS, LOANS AND OTHER ASSETS OF FIVE SIMMONS BANK LOCATIONS IN KEY TEXAS MARKETS CONROE, TEXAS – December 23, 2019 – Spirit of Texas Bancshares, Inc. (NASDAQ:STXB) (the “Company” or “Spiri

November 15, 2019 SC 13D

STXB / Spirit of Texas Bancshares, Inc. / Kidd Partners, Ltd. - SC 13D Activist Investment

SC 13D SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. )* Spirit of Texas Bancshares, Inc. (Name of Issuer) Common Stock, no par value per share (Title of Class of Securities) 84861D103 (CUSIP Number) Steven Gregory Kidd General Partner Kidd Partners, Ltd. 2160 Fawnwood Drive Plano, Texas 75093 (903) 570-5623 (Name, Ad

November 14, 2019 EX-99.1

Important Information ABOUT SPIRIT OF TEXAS BANCSHARES, INC. Spirit of Texas Bancshares, Inc. (“Spirit,” “STXB” or the “Company”), through its wholly-owned subsidiary, Spirit of Texas Bank (the “Bank”), provides a wide range of relationship-driven co

EX-99.1 Spirit of Texas Bancshares, Inc. Sandler O'Neill - East Coast Financial Services Conference Exhibit 99.1 Important Information ABOUT SPIRIT OF TEXAS BANCSHARES, INC. Spirit of Texas Bancshares, Inc. (“Spirit,” “STXB” or the “Company”), through its wholly-owned subsidiary, Spirit of Texas Bank (the “Bank”), provides a wide range of relationship-driven commercial banking products and service

November 14, 2019 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 14, 2019 (November 14, 2019) Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction o

November 8, 2019 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2019 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-38484 Spirit of Texas Bancshares, Inc.

November 6, 2019 EX-99.1

SPIRIT OF TEXAS BANCSHARES, INC. COMPLETES ACQUISITION OF CHANDLER BANCORP, INC.

EX-99.1 Exhibit 99.1 NEWS RELEASE Contacts: Dennard Lascar Investor Relations Ken Dennard / Natalie Hairston (713) 529-6600 [email protected] FOR IMMEDIATE RELEASE SPIRIT OF TEXAS BANCSHARES, INC. COMPLETES ACQUISITION OF CHANDLER BANCORP, INC. CONROE, TEXAS – November 5, 2019 – Spirit of Texas Bancshares, Inc. (NASDAQ:STXB) (“Spirit”), the holding company for Spirit of Texas Bank, completed

November 6, 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, 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): November 6, 2019 (November 5, 2019) Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction of

October 23, 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): October 22, 2019 Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or Other Jurisdiction of Incorporation) (Com

October 23, 2019 EX-99.1

Spirit of Texas Bancshares, Inc. Reports Third Quarter 2019 Financial Results

Spirit of Texas Bancshares, Inc. Reports Third Quarter 2019 Financial Results Organic loan growth of $69.4 million for the quarter CONROE, Texas, Oct. 22, 2019 /PRNewswire/ - Spirit of Texas Bancshares, Inc. (NASDAQ: STXB) ("Spirit" or the "Company"), the bank holding company for Spirit of Texas Bank, today reported its results as of and for the three months ended September 30, 2019. Third Quarter

August 9, 2019 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2019 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-38484 Spirit of Texas Bancshares, Inc.

July 25, 2019 EX-1.1

Underwriting Agreement, dated July 25, 2019, by and between Spirit of Texas Bancshares, Inc., Spirit of Texas Bank, SSB, and Stephens Inc. and Keefe, Bruyette & Woods, Inc. (incorporated herein by reference to Exhibit 1.1 to Current Report on Form 8-K filed with the SEC on July 25, 2019 (File No. 001-38484)).

EX-1.1 Exhibit 1.1 Spirit of Texas Bancshares, Inc. (a Texas corporation) 2,000,000 Shares of Common Stock (No Par Value per Share) UNDERWRITING AGREEMENT July 25, 2019 Stephens Inc. 111 Center Street Little Rock, Arkansas 72201 Keefe, Bruyette & Woods, Inc. 787 Seventh Avenue, 4th Floor New York, New York 10019 as Representatives of the Underwriters named in Schedule A hereto Ladies and Gentlemen

July 25, 2019 8-K

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Financial Statements and Exhibits

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 25, 2019 (July 25, 2019) Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction

July 25, 2019 EX-99.1

SPIRIT OF TEXAS BANCSHARES, INC. ANNOUNCES PRICING OF COMMON STOCK OFFERING

EX-99.1 Exhibit 99.1 Contacts: Dennard Lascar Investor Relations Ken Dennard / Natalie Hairston FOR IMMEDIATE RELEASE (713) 529-6600 [email protected] SPIRIT OF TEXAS BANCSHARES, INC. ANNOUNCES PRICING OF COMMON STOCK OFFERING CONROE, TX – July 25, 2019 – Spirit of Texas Bancshares, Inc. (NASDAQ: STXB) (“Spirit” or the “Company”), the bank holding company of Spirit of Texas Bank, SSB, announc

July 25, 2019 424B5

2,000,000 Shares Spirit of Texas Bancshares, Inc. Common Stock

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

July 24, 2019 424B5

SUBJECT TO COMPLETION PRELIMINARY PROSPECTUS SUPPLEMENT DATED JULY 24, 2019

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

July 24, 2019 EX-2.1

Agreement and Plan of Reorganization, dated as of July 24, 2019, by and between Spirit of Texas Bancshares, Inc. and Chandler Bancorp, Inc., and joined in by Kidd Partners, Ltd. (incorporated by reference to Exhibit 2.1 to the Company’s Form 8-K filed with the Commission on July 24, 2019 (File No. 001-38484)) (schedules and exhibits have been omitted pursuant to Item 601(a)(5) of Regulation S-K; however, the Company hereby agrees to furnish a copy of any omitted schedule or similar attachment to the SEC upon request)

EX-2.1 Exhibit 2.1 AGREEMENT AND PLAN OF REORGANIZATION by and between SPIRIT OF TEXAS BANCSHARES, INC. and CHANDLER BANCORP, INC., and joined in by KIDD PARTNERS, LTD. Dated as of July 24, 2019 TABLE OF CONTENTS ARTICLE I. THE MERGER 2 Section 1.1 The Merger 2 Section 1.2 Organizational Documents and Facilities of Continuing Corporation 2 Section 1.3 Board of Directors and Officers of Continuing

July 24, 2019 EX-99.1

Excerpt from Preliminary Prospectus Supplement:

EX-99.1 Exhibit 99.1 Unless otherwise indicated or the context requires otherwise, as used in this Exhibit 99.1, the terms “we,” “our,” “us” and like terms refer collectively to Spirit of Texas Bancshares, Inc. and our subsidiaries. “Chandler acquisition” refers to our pending acquisition through a series of mergers of Chandler Bancorp, Inc. and its subsidiary, Citizens State Bank, and “Beeville a

July 24, 2019 EX-99.4

Important Information NO OFFER OR SOLICITATION This presentation does not constitute an offer to sell or the solicitation of an offer to buy securities, nor shall there be any offer or sale of these securities in any state or jurisdiction in which su

EX-99.4 Acquisition of Chandler Bancorp, Inc. & Follow-On Equity Capital Raise Filed Pursuant to Rule 433 Registration Statement No. 333-232092 Dated July 24, 2019 Supplementing the Preliminary Prospectus Supplement (dated July 24, 2019) to Prospectus (dated June 24, 2019) Exhibit 99.4 Important Information NO OFFER OR SOLICITATION This presentation does not constitute an offer to sell or the soli

July 24, 2019 EX-10.2

Registration Rights Agreement dated as of July 24, 2019, by and between Spirit of Texas Bancshares, Inc. and Kidd Partners, Ltd. (incorporated by reference to Exhibit 10.2 to the Company’s Form 8-K filed with the Commission on July 24, 2019) (File No. 001-38484)

EX-10.2 EXHIBIT 10.2 SPIRIT OF TEXAS BANCSHARES, INC. REGISTRATION RIGHTS AGREEMENT This Registration Rights Agreement (this “Agreement”) is made and entered into as of July 24, 2019, by and among Spirit of Texas Bancshares, Inc., a Texas corporation (“STXB”), and Kidd Partners, Ltd., a Texas limited partnership (“KPL”). WHEREAS, STXB and Chandler Bancorp, Inc., a Texas corporation and wholly owne

July 24, 2019 EX-10.1

Form of Director Support Agreement

EX-10.1 EXHIBIT 10.1 FORM OF DIRECTOR SUPPORT AGREEMENT This DIRECTOR SUPPORT AGREEMENT (this “Agreement”) is made and entered into as of July [ ], 2019 (the “Execution Date”), by and between Spirit of Texas Bancshares, Inc. (“STXB”), a Texas corporation, Chandler Bancorp, Inc. (“CBI”), a Texas corporation, and [ ], a natural person (the “Undersigned”). Terms with their initial letters capitalized

July 24, 2019 EX-99.3

SPIRIT OF TEXAS BANCSHARES, INC. ANNOUNCES COMMENCEMENT OF COMMON STOCK OFFERING

EX-99.3 Exhibit 99.3 NEWS RELEASE Contacts: Dennard Lascar Investor Relations Ken Dennard / Natalie Hairston (713) 529-6600 [email protected] SPIRIT OF TEXAS BANCSHARES, INC. ANNOUNCES COMMENCEMENT OF COMMON STOCK OFFERING CONROE, TX – July 24, 2019 – Spirit of Texas Bancshares, Inc. (NASDAQ: STXB) (“Spirit”) announced today that it has commenced an underwritten public offering of its common

July 24, 2019 EX-99.2

SPIRIT OF TEXAS BANCSHARES, INC. AND CHANDLER BANCORP, INC. TO MERGE

EX-99.2 Exhibit 99.2 NEWS RELEASE Contacts: Dennard Lascar Investor Relations Ken Dennard / Natalie Hairston (713) 529-6600 [email protected] SPIRIT OF TEXAS BANCSHARES, INC. AND CHANDLER BANCORP, INC. TO MERGE CONROE, TX – July 24, 2019 – Spirit of Texas Bancshares, Inc. (NASDAQ: STXB) ( “Spirit”), the holding company for Spirit of Texas Bank, announced today that it is acquiring through a s

July 24, 2019 8-K

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Results of Operations and Financial Condition, 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): July 24, 2019 (July 24, 2019) Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction of in

July 24, 2019 EX-99.5

UNAUDITED PRO FORMA COMBINED CONDENSED CONSOLIDATED BALANCE SHEET AS OF DECEMBER 31, 2018

EX-99.5 Exhibit 99.5 UNAUDITED PRO FORMA COMBINED CONDENSED CONSOLIDATED BALANCE SHEET AS OF DECEMBER 31, 2018 The following unaudited pro forma combined condensed consolidated balance sheet as of December 31, 2018 has been prepared to show the impact on Spirit of Texas Bancshares, Inc.’s (“Spirit”) historical financial position and results of operations of the completion of the acquisition of Fir

July 24, 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): July 24, 2019 (July 24, 2019) Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction of in

July 24, 2019 EX-99.1

SPIRIT OF TEXAS BANCSHARES, INC. REPORTS SECOND QUARTER 2019 FINANCIAL RESULTS

EX-99.1 Exhibit 99.1 NEWS RELEASE Contacts: Dennard Lascar Investor Relations Ken Dennard / Natalie Hairston (713) 529-6600 [email protected] SPIRIT OF TEXAS BANCSHARES, INC. REPORTS SECOND QUARTER 2019 FINANCIAL RESULTS CONROE, TX – July 24, 2019 – Spirit of Texas Bancshares, Inc. (NASDAQ: STXB) (“Spirit” or the “Company”), the bank holding company for Spirit of Texas Bank, today reported it

July 24, 2019 10-K/A

Annual Report - 10-K/A

10-K/A Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

July 24, 2019 EX-21.1

List of Subsidiaries of Spirit of Texas Bancshares, Inc.

EX-21.1 2 d781624dex211.htm EX-21.1 Exhibit 21.1 Subsidiaries of Spirit of Texas Bancshares, Inc. Entity Name State of Incorporation Spirit of Texas Bank, SSB Texas

July 3, 2019 EX-10.1

Form of Employee Restricted Stock Unit Award Agreement (incorporated herein by reference to Exhibit 10.1 to the Company’s Form 8-K filed with the Commission on July 3, 2019) (File No. 001-38484).

EX-10.1 Exhibit 10.1 ST FINANCIAL GROUP, INC. 2017 STOCK INCENTIVE PLAN NOTICE OF RESTRICTED STOCK UNIT AWARD Subject to the terms and conditions of this Notice of Restricted Stock Unit Award (this “Notice”), the Restricted Stock Unit Award Agreement attached hereto (the “Award Agreement”), and the ST Financial Group, Inc. 2017 Stock Incentive Plan (the “Plan”), the below individual (the “Particip

July 3, 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

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 3, 2019 (July 1, 2019) Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction of

June 20, 2019 CORRESP

STXB / Spirit of Texas Bancshares, Inc. CORRESP - -

CORRESP June 20, 2019 VIA EDGAR United States Securities and Exchange Commission Division of Corporation Finance 100 F.

June 13, 2019 8-K

Financial Statements and Exhibits, Other Events

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): June 13, 2019 (June 12, 2019) Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction

June 13, 2019 EX-99.1

SPIRIT OF TEXAS BANCSHARES, INC. ANNOUNCES FILING OF $150 MILLION SHELF REGISTRATION STATEMENT AND AUTHORIZATION OF A STOCK BUYBACK PROGRAM

EX-99.1 Exhibit 99.1 Contacts: Spirit of Texas Bancshares, Inc. Jerry Golemon (281) 516-4904 [email protected] Dennard Lascar Investor Relations Ken Dennard / Natalie Hairston (713) 529-6600 [email protected] SPIRIT OF TEXAS BANCSHARES, INC. ANNOUNCES FILING OF $150 MILLION SHELF REGISTRATION STATEMENT AND AUTHORIZATION OF A STOCK BUYBACK PROGRAM CONROE, TEXAS — June 13, 2019 — Spirit of Texa

June 13, 2019 EX-4.3

Form of Senior Debt Indenture.

EX-4.3 Exhibit 4.3 SPIRIT OF TEXAS BANCSHARES, INC., AS ISSUER AND [ ], AS TRUSTEE SENIOR INDENTURE DATED AS OF [ , ] SENIOR DEBT SECURITIES CROSS-REFERENCE TABLE Reconciliation and tie between the Trust Indenture Act of 1939, as amended (the “TIA”), and the Indenture dated as of , 20 . SECTION OF ACT SECTION OF INDENTURE 310(a)(1) and (2) 7.09 310(a)(3) and (4) Not applicable 310(a)(5) 7.09 310(b

June 13, 2019 S-3

STXB / Spirit of Texas Bancshares, Inc. S-3 - - FORM S-3

Form S-3 Table of Contents As filed with the Securities and Exchange Commission on June 13, 2019 Registration No.

June 13, 2019 EX-4.4

Form of Subordinated Debt Indenture.

EX-4.4 Exhibit 4.4 SPIRIT OF TEXAS BANCSHARES, INC., AS ISSUER AND [ ], AS TRUSTEE SUBORDINATED INDENTURE DATED AS OF [ , ] SUBORDINATED DEBT SECURITIES CROSS-REFERENCE TABLE Reconciliation and tie between the Trust Indenture Act of 1939, as amended (the “TIA”), and the Indenture dated as of , 20 . SECTION OF ACT SECTION OF INDENTURE 310(a)(1) and (2) 7.09 310(a)(3) and (4) Not applicable 310(a)(5

May 28, 2019 8-K/A

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

Form 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): May 28, 2019 (April 2, 2019) Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdicti

May 28, 2019 EX-99.3

UNAUDITED PRO FORMA COMBINED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

EX-99.3 Exhibit 99.3 UNAUDITED PRO FORMA COMBINED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS The following unaudited pro forma combined condensed consolidated balance sheet as of March 31, 2019 and the unaudited pro forma combined condensed consolidated statements of income for the three months ended March 31, 2019 and the year ended December 31, 2018 have been prepared to show the impact on Spir

May 28, 2019 EX-99.1

First Beeville Financial Corporation Independent Auditor’s Report and Consolidated Financial Statements December 31, 2018 and 2017

EX-99.1 Exhibit 99.1 First Beeville Financial Corporation Independent Auditor’s Report and Consolidated Financial Statements December 31, 2018 and 2017 First Beeville Financial Corporation December 31, 2018 and 2017 Contents Independent Auditor’s Report 1 Consolidated Financial Statements Balance Sheets 2 Statements of Income 3 Statements of Comprehensive Income 4 Statements of Stockholders’ Equit

May 28, 2019 EX-99.2

First Beeville Financial Corporation Consolidated Financial Statements March 31, 2019

EX-99.2 Exhibit 99.2 First Beeville Financial Corporation Consolidated Financial Statements March 31, 2019 First Beeville Financial Corporation March 31, 2019 Contents Consolidated Financial Statements Balance Sheets 2 Statements of Income 3 Statements of Comprehensive Income 4 Statements of Stockholders’ Equity 5 Statements of Cash Flows 6 Notes to Financial Statements 8 First Beeville Financial

May 24, 2019 8-K

Financial Statements and Exhibits, Other Events, Submission of Matters to a Vote of Security Holders

Form 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 24, 2019 (May 23, 2019) Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction of

May 24, 2019 EX-99.1

SPIRIT OF TEXAS BANCSHARES, INC. SHAREHOLDERS ELECT NELDA LUCE BLAIR AND RE-ELECT FIVE OTHERS TO THE BOARD

EX-99.1 Exhibit 99.1 Contacts: Dennard Lascar Investor Relations Ken Dennard / Natalie Hairston (713) 529-6600 [email protected] SPIRIT OF TEXAS BANCSHARES, INC. SHAREHOLDERS ELECT NELDA LUCE BLAIR AND RE-ELECT FIVE OTHERS TO THE BOARD CONROE, TEXAS – MAY 24, 2019 – Spirit of Texas Bancshares, Inc. (NASDAQ: STXB) (the “Company” or “Spirit”), the holding company for Spirit of Texas Bank, today

May 24, 2019 DRS

STXB / Spirit of Texas Bancshares, Inc. DRS - -

DRS Table of Contents As confidentially submitted to the Securities and Exchange Commission on May 24, 2019.

May 10, 2019 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2019 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-38484 Spirit of Texas Bancshares, Inc.

May 6, 2019 8-K

Regulation FD Disclosure, 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): May 6, 2019 Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction of incorporation) (Comm

May 6, 2019 EX-99.1

Forward-Looking Statements This presentation and oral statements made regarding the subject of this presentation contain forward-looking statements within the meaning of the U.S. Private Securities Litigation Reform Act of 1995. Words such as “expect

EX-99.1 Gulf South Bank Conference Presentation Exhibit 99.1 Forward-Looking Statements This presentation and oral statements made regarding the subject of this presentation contain forward-looking statements within the meaning of the U.S. Private Securities Litigation Reform Act of 1995. Words such as “expects,” “believes,” “estimates,” “anticipates,” “targets,” “goals,” “projects,” “intends,” “p

May 2, 2019 EX-99.2

Transcript Q1 2019 Spirit of Texas Bancshares Inc Earnings Call APRIL 30, 2019

Exhibit 99.2 Transcript Q1 2019 Spirit of Texas Bancshares Inc Earnings Call APRIL 30, 2019 CORPORATE PARTICIPANTS David M. McGuire Spirit of Texas Bancshares, Inc. - President & Director Dean O. Bass Spirit of Texas Bancshares, Inc. - Chairman of the Board & CEO Jeffrey A. Powell Spirit of Texas Bancshares, Inc. - Executive VP & CFO Jerry D. Golemon Spirit of Texas Bancshares, Inc. - Executive VP

May 2, 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): April 29, 2019 Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or Other Jurisdiction of Incorporation) (Commi

May 2, 2019 EX-99.1

Spirit of Texas Bancshares, Inc. Reports First Quarter 2019 Financial Results

Exhibit 99.1 Spirit of Texas Bancshares, Inc. Reports First Quarter 2019 Financial Results CONROE, Texas, April 29, 2019 /PRNewswire/ - Spirit of Texas Bancshares, Inc. (NASDAQ: STXB) ("Spirit" or the "Company"), the bank holding company for Spirit of Texas Bank, today reported its results as of and for the quarter ended March 31, 2019. First Quarter 2019 Financial and Operational Highlights Net i

April 11, 2019 DEF 14A

DEF 14A

DEF 14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(A) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission

April 3, 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, Completion of Acquisition or Disposition of Assets, Other Events

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): April 2, 2019 Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction of incorporation

April 3, 2019 EX-99.1

SPIRIT OF TEXAS BANCSHARES, INC. COMPLETES ITS ACQUISITION OF FIRST BEEVILLE FINANCIAL CORPORATION AND THE FIRST NATIONAL BANK OF BEEVILLE

EX-99.1 Exhibit 99.1 NEWS RELEASE Contacts: Dennard Lascar Investor Relations Ken Dennard / Natalie Hairston (713) 529-6600 [email protected] SPIRIT OF TEXAS BANCSHARES, INC. COMPLETES ITS ACQUISITION OF FIRST BEEVILLE FINANCIAL CORPORATION AND THE FIRST NATIONAL BANK OF BEEVILLE CONROE, TEXAS – April 2, 2019 – Spirit of Texas Bancshares, Inc. (NASDAQ:STXB) (“Spirit”), the holding company for

March 15, 2019 10-K

Annual Report - 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2018 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission File Number 001-38484 Spirit of Texas

February 14, 2019 SC 13G/A

STXB / Spirit of Texas Bancshares, Inc. / FJ Capital Management LLC Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1) * Spirit of Texas Bancshares (STXB) (Name of Issuer) Common Stock (Title of Class of Securities) 84861D103 (CUSIP Number) 12/31/2018 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which

February 14, 2019 SC 13G

STXB / Spirit of Texas Bancshares, Inc. / RMB Capital Management, LLC Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No.

February 8, 2019 424B3

PROXY STATEMENT/PROSPECTUS PROPOSED MERGER—YOUR VOTE IS VERY IMPORTANT

424B3 Table of Contents Filed Pursuant to Rule 424(b)(3) Registration No. 333-229183 PROXY STATEMENT/PROSPECTUS PROPOSED MERGER—YOUR VOTE IS VERY IMPORTANT Dear Shareholder: On November 27, 2018, Spirit of Texas Bancshares, Inc., a Texas corporation, which we refer to as Spirit, and First Beeville Financial Corporation, a Texas corporation, which we refer to as Beeville, entered into an Agreement

February 6, 2019 EX-99.1

Form of proxy for holders of Beeville common stock.

EX-99.1 Exhibit 99.1 FIRST BEEVILLE FINANCIAL CORPORATION 1400 East Houston Street Beeville, Texas 78102 THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS I hereby appoint Brannon H. Brooke and George G. Latcham, and either of them, with full power of substitution, to be my attorneys and proxies at the special meeting of shareholders of First Beeville Financial Corporation (the “Company”

February 6, 2019 S-4/A

STXB / Spirit of Texas Bancshares, Inc. S-4/AMENDMENT NO.1

S-4/Amendment No.1 Table of Contents As filed with the Securities and Exchange Commission on February 6, 2019 Registration No. 333-229183 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Amendment No. 1 to Form S-4 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 SPIRIT OF TEXAS BANCSHARES, INC. (Exact name of registrant as specified in its charter) Texas 6022 90-0499

February 6, 2019 EX-99.2

Consent of Sheshunoff & Co. Investment Banking.

EX-99.2 Exhibit 99.2 CONSENT OF SHESHUNOFF & CO. We hereby consent to the use of our name and to the description of our opinion, dated November 27, 2018, under the caption “Opinion of Beeville’s Financial Advisor” in, and to the inclusion of our opinion letter as Annex D, to the Proxy Statement-Prospectus, which Proxy Statement-Prospectus forms a part of the Registration Statement on Form S-4 of S

February 6, 2019 EX-99.3

Consent of Mr. Allen C. Jones, IV (as director appointee).

EX-99.3 Exhibit 99.3 Consent of Person Named as About to Become Director Pursuant to Rule 438 promulgated under the Securities Act of 1933, as amended (the “Securities Act”), I hereby consent to being named in the Registration Statement on Form S-4 of Spirit of Texas Bancshares, Inc., and all amendments thereto (the “Registration Statement”), any prospectus filed pursuant to Rule 424 promulgated u

February 6, 2019 CORRESP

STXB / Spirit of Texas Bancshares, Inc.

CORRESP February 6, 2019 VIA EDGAR United States Securities and Exchange Commission Division of Corporation Finance 100 F.

February 5, 2019 EX-99.1

UPDATE - Spirit of Texas Bancshares, Inc. Reports Fourth Quarter 2018 Financial Results

EXHIBIT 99.1 UPDATE - Spirit of Texas Bancshares, Inc. Reports Fourth Quarter 2018 Financial Results CONROE, Texas, Feb. 04, 2019 (GLOBE NEWSWIRE) - Spirit of Texas Bancshares, Inc. (NASDAQ: STXB) (“Spirit” or the “Company”), the bank holding company for Spirit of Texas Bank, SSB, today reported its results for the fourth quarter ended December 31, 2018. Fourth Quarter 2018 Financial and Operation

February 5, 2019 8-K/A

Financial Statements and Exhibits, Results of Operations and Financial Condition, Other Events

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): January 30, 2019 Spirit of Texas Bancshares, Inc. (Exact Name of Registrant as Specified in Charter) Texas 001-38484 90-0499552 (State or Other Jurisdiction of Incorporation) (Commi

February 4, 2019 EX-99.1

UPDATE - Spirit of Texas Bancshares, Inc. Reports Fourth Quarter 2018 Financial Results

EXHIBIT 99.1 UPDATE - Spirit of Texas Bancshares, Inc. Reports Fourth Quarter 2018 Financial Results CONROE, Texas, Feb. 04, 2019 (GLOBE NEWSWIRE) - Spirit of Texas Bancshares, Inc. (NASDAQ: STXB) (“Spirit” or the “Company”), the bank holding company for Spirit of Texas Bank, SSB, today reported its results for the fourth quarter ended December 31, 2018. Fourth Quarter 2018 Financial and Operation

February 4, 2019 425

STXB / Spirit of Texas Bancshares, Inc. FORM 8-K/A (Prospectus)

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): January 30, 2019 Spirit of Texas Bancshares, Inc. (Exact Name of Registrant as Specified in Charter) Texas 001-38484 90-0499552 (State or Other Jurisdiction of Incorporation) (Commi

January 30, 2019 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event Reported): January 30, 2019 Spirit of Texas Bancshares, Inc. (Exact Name of Registrant as Specified in Charter) Texas 001-38484 90-0499552 (State or Other Jurisdiction of Incorporation) (Commiss

January 30, 2019 EX-99.1

Spirit of Texas Bancshares, Inc. Reports Fourth Quarter 2018 Financial Results

EXHIBIT 99.1 Spirit of Texas Bancshares, Inc. Reports Fourth Quarter 2018 Financial Results CONROE, Texas, Jan. 30, 2019 (GLOBE NEWSWIRE) - Spirit of Texas Bancshares, Inc. (NASDAQ: STXB) (the “Company”), the bank holding company for Spirit of Texas Bank, today reported its results for its fourth quarter December 31, 2018. Fourth Quarter 2018 Financial and Operational Highlights Net income increas

January 10, 2019 EX-99.3

Consent of Mr. Allen C. Jones, IV (as director appointee).

EX-99.3 Exhibit 99.3 Consent of Person Named as About to Become Director Pursuant to Rule 438 promulgated under the Securities Act of 1933, as amended (the “Securities Act”), I hereby consent to being named in the Registration Statement on Form S-4 of Spirit of Texas Bancshares, Inc., and all amendments thereto (the “Registration Statement”), any prospectus filed pursuant to Rule 424 promulgated u

January 10, 2019 EX-99.2

Consent of Sheshunoff & Co. Investment Banking.

EX-99.2 Exhibit 99.2 CONSENT OF SHESHUNOFF & CO. We hereby consent to the use of our name and to the description of our opinion, dated November 27, 2018, under the caption “Opinion of Beeville’s Financial Advisor” in, and to the inclusion of our opinion letter as Annex D, to the Proxy Statement-Prospectus, which Proxy Statement-Prospectus forms a part of the Registration Statement on Form S-4 of S

January 10, 2019 S-4

Agreement and Plan of Reorganization, dated as of July 19, 2018, by and among Spirit of Texas Bancshares, Inc. and Comanche National Corporation (incorporated by reference to Exhibit 2.1 to Current Report on Form 8-K filed with the SEC on July 19, 2018 (File No. 001-38484)) (schedules to which have been omitted pursuant to Item 601(b)(2) of Regulation S-K and will be provided to the SEC upon request).

S-4 1 d680686ds4.htm FORM S-4 Table of Contents As filed with the Securities and Exchange Commission on January 10, 2019 Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form S-4 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 SPIRIT OF TEXAS BANCSHARES, INC. (Exact name of registrant as specified in its charter) Texas 6022 90-0499552 (State or

November 28, 2018 8-K

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Financial Statements and Exhibits

8-K 1 d662012d8k.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): November 27, 2018 Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other juri

November 28, 2018 EX-10.2

Form of Beeville Director Support Agreement (incorporated herein by reference to Exhibit 10.2 to Current Report on Form 8-K filed with the SEC on November 28, 2018 (File No. 001-38484)).

EX-10.2 Exhibit 10.2 DIRECTOR SUPPORT AGREEMENT This DIRECTOR SUPPORT AGREEMENT (this “Agreement”) is made and entered into as of November 27, 2018 (the “Execution Date”), by and between Spirit of Texas Bancshares, Inc., a Texas corporation (“Spirit”), First Beeville Financial Corporation, a Texas corporation (the “Company”), and [ ], an individual resident of the State of [ ] (the “Undersigned”).

November 28, 2018 EX-99.1

SPIRIT OF TEXAS BANCSHARES, INC. TO ACQUIRE FIRST BEEVILLE FINANCIAL CORPORATION AND ITS SUBSIDIARY, THE FIRST NATIONAL BANK OF BEEVILLE Spirit of Texas to Add Three Branches and Three LPOs in the Beeville, San Antonio and Corpus Christi Markets

EX-99.1 Exhibit 99.1 FOR IMMEDIATE RELEASE Contacts: Dennard Lascar Investor Relations Ken Dennard / Natalie Hairston (713) 529-6600 [email protected] SPIRIT OF TEXAS BANCSHARES, INC. TO ACQUIRE FIRST BEEVILLE FINANCIAL CORPORATION AND ITS SUBSIDIARY, THE FIRST NATIONAL BANK OF BEEVILLE Spirit of Texas to Add Three Branches and Three LPOs in the Beeville, San Antonio and Corpus Christi Market

November 28, 2018 EX-10.1

Form of Beeville Voting Agreement (incorporated herein by reference to Exhibit 10.1 to Current Report on Form 8-K filed with the SEC on November 28, 2018 (File No. 001-38484)).

EX-10.1 Exhibit 10.1 VOTING AGREEMENT This VOTING AGREEMENT (this “Agreement”), dated as of November 27, 2018, is executed by and among Spirit of Texas Bancshares, Inc., a Texas corporation (“Spirit”), First Beeville Financial Corporation, a Texas corporation (the “Company”), and the shareholders of the Company who are signatories hereto (referred to herein individually as a “Shareholder” and coll

November 28, 2018 EX-99.2

Forward-Looking Statements This presentation contains statements regarding the proposed transaction (“merger”) between Spirit of Texas Bancshares, Inc. (“Spirit,” “STXB,” “we,” “us,” or “our”) and First Beeville Financial Corporation (“Beeville”). Th

EX-99.2 Acquisition of First Beeville Financial Corporation Exhibit 99.2 Forward-Looking Statements This presentation contains statements regarding the proposed transaction (“merger”) between Spirit of Texas Bancshares, Inc. (“Spirit,” “STXB,” “we,” “us,” or “our”) and First Beeville Financial Corporation (“Beeville”). These statements constitute forward-looking statements within the meaning of th

November 28, 2018 EX-2.1

Agreement and Plan of Reorganization, dated as of November 27, 2018, by and among Spirit of Texas Bancshares, Inc. and First Beeville Financial Corporation (incorporated by reference to Exhibit 2.1 to Current Report on Form 8-K filed with the SEC on November 28, 2018) (schedules to which have been omitted pursuant to Item 601(b)(2) of Regulation S-K and will be provided to the SEC upon request).

EX-2.1 Exhibit 2.1 AGREEMENT AND PLAN OF REORGANIZATION by and between SPIRIT OF TEXAS BANCSHARES, INC. and FIRST BEEVILLE FINANCIAL CORPORATION Dated as of November 27, 2018 TABLE OF CONTENTS ARTICLE I. THE MERGER 2 Section 1.1 The Merger 2 Section 1.2 Organizational Documents and Facilities of Continuing Corporation 2 Section 1.3 Board of Directors and Officers of Continuing Corporation 2 Sectio

November 28, 2018 EX-10.2

Form of Director Support Agreement

EX-10.2 Exhibit 10.2 DIRECTOR SUPPORT AGREEMENT This DIRECTOR SUPPORT AGREEMENT (this “Agreement”) is made and entered into as of November 27, 2018 (the “Execution Date”), by and between Spirit of Texas Bancshares, Inc., a Texas corporation (“Spirit”), First Beeville Financial Corporation, a Texas corporation (the “Company”), and [ ], an individual resident of the State of [ ] (the “Undersigned”).

November 28, 2018 425

STXB / Spirit of Texas Bancshares, Inc. FORM 8-K (Prospectus)

Form 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 27, 2018 Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas 001-38484 90-0499552 (State or other jurisdiction of incorpora

November 28, 2018 EX-99.2

Forward-Looking Statements This presentation contains statements regarding the proposed transaction (“merger”) between Spirit of Texas Bancshares, Inc. (“Spirit,” “STXB,” “we,” “us,” or “our”) and First Beeville Financial Corporation (“Beeville”). Th

EX-99.2 Acquisition of First Beeville Financial Corporation Exhibit 99.2 Forward-Looking Statements This presentation contains statements regarding the proposed transaction (“merger”) between Spirit of Texas Bancshares, Inc. (“Spirit,” “STXB,” “we,” “us,” or “our”) and First Beeville Financial Corporation (“Beeville”). These statements constitute forward-looking statements within the meaning of th

November 28, 2018 EX-2.1

Agreement and Plan of Reorganization by and between Spirit of Texas Bancshares, Inc. and First Beeville Financial Corporation, dated as of November 27, 2018 (schedules and exhibits have been omitted pursuant to Item 601(b)(2) of Regulation S-K)

EX-2.1 Exhibit 2.1 AGREEMENT AND PLAN OF REORGANIZATION by and between SPIRIT OF TEXAS BANCSHARES, INC. and FIRST BEEVILLE FINANCIAL CORPORATION Dated as of November 27, 2018 TABLE OF CONTENTS ARTICLE I. THE MERGER 2 Section 1.1 The Merger 2 Section 1.2 Organizational Documents and Facilities of Continuing Corporation 2 Section 1.3 Board of Directors and Officers of Continuing Corporation 2 Sectio

November 28, 2018 EX-99.1

SPIRIT OF TEXAS BANCSHARES, INC. TO ACQUIRE FIRST BEEVILLE FINANCIAL CORPORATION AND ITS SUBSIDIARY, THE FIRST NATIONAL BANK OF BEEVILLE Spirit of Texas to Add Three Branches and Three LPOs in the Beeville, San Antonio and Corpus Christi Markets

EX-99.1 Exhibit 99.1 FOR IMMEDIATE RELEASE Contacts: Dennard Lascar Investor Relations Ken Dennard / Natalie Hairston (713) 529-6600 [email protected] SPIRIT OF TEXAS BANCSHARES, INC. TO ACQUIRE FIRST BEEVILLE FINANCIAL CORPORATION AND ITS SUBSIDIARY, THE FIRST NATIONAL BANK OF BEEVILLE Spirit of Texas to Add Three Branches and Three LPOs in the Beeville, San Antonio and Corpus Christi Market

November 28, 2018 EX-10.1

Form of Voting Agreement

EX-10.1 Exhibit 10.1 VOTING AGREEMENT This VOTING AGREEMENT (this “Agreement”), dated as of November 27, 2018, is executed by and among Spirit of Texas Bancshares, Inc., a Texas corporation (“Spirit”), First Beeville Financial Corporation, a Texas corporation (the “Company”), and the shareholders of the Company who are signatories hereto (referred to herein individually as a “Shareholder” and coll

November 14, 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, Completion of Acquisition or Disposition of Assets, Other Events

Form 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 14, 2018 Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas (State or other jurisdiction of incorporation) 001-38484 (Comm

November 14, 2018 EX-99.1

Spirit of Texas Bancshares, Inc. Completes Comanche Acquisition

EX-99.1 Exhibit 99.1 Spirit of Texas Bancshares, Inc. Completes Comanche Acquisition CONROE, Texas, Nov. 14, 2018 (GLOBE NEWSWIRE) — Spirit of Texas Bancshares, Inc. (NASDAQ:STXB) (the “Company” or “Spirit”), the holding company for Spirit of Texas Bank, SSB, today announced that it has closed its previously announced acquisition of Comanche National Corporation and its subsidiary, The Comanche Na

November 14, 2018 8-K

Other Events, Submission of Matters to a Vote of Security Holders

Form 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 13, 2018 Spirit of Texas Bancshares, Inc. (Exact name of registrant as specified in its charter) Texas (State or other jurisdiction of incorporation) 001-38484 (Comm

November 7, 2018 10-Q

STXB / Spirit of Texas Bancshares, Inc. 10-Q (Quarterly Report)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2018 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-38484 Spirit of Texas Bancshares, Inc.

November 5, 2018 S-8

STXB / Spirit of Texas Bancshares, Inc. S-8

S-8 As filed with the Securities and Exchange Commission on November 5, 2018 Registration No.

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