GLADSTONE COMMERCIAL CORP 10-Q

Item 5. Other Information During the three months ended June 30, 2026, none of our directors or officers adopted or terminated a “Rule 10b5-1 trading arrangement” or “non-Rule 10b5-1 trading arrangement,” as those terms are defined Regulation S-K, Item 408. Item 6. Exhibits Exhibit Index Exhibit Number Exhibit Description 3.1 Articles of Restatement of the Registrant, incorporated by reference to Exhibit 3.2 to the Registrant’s Current Report on Form 8-K (File No. 001-33097), filed January 12, 2017. 3.2 Bylaws of the Registrant, incorporated by reference to Exhibit 3.2 to the Registrant’s Registration Statement on Form S-11 (File No. 333-106024), filed June 11, 2003. 3.3 First Amendment to Bylaws of the Registrant, incorporated by reference to Exhibit 99.1 to the Registrant’s Current Report on Form 8-K (File No. 001-33097), filed July 10, 2007. 3.4 Second Amendment to Bylaws of the Registrant, incorporated by reference to Exhibit 3.1 to the Registrant’s Current Report on Form 8-K (File No. 001-33097), filed December 1, 2016. 47 Table of Contents 3.5 Third Amendment to Bylaws of the Registrant, incorporated by reference to Exhibit 3.1 to the Registrant’s Current Report on Form 8-K (File No. 001-33097), filed October 10, 2023. 3.6 Articles Supplementary, incorporated by reference to Exhibit 3.1 to the Registrant’s Current Report on Form 8-K (File No. 001-33097), filed April 12, 2018. 3.7 Articles of Amendment, incorporated by reference to Exhibit 3.2 to the Registrant’s Current Report on Form 8-K (File No. 001-33097), filed April 12, 2018. 3.8 Articles Supplementary for 6.625% Series E Cumulative Redeemable Preferred Stock, incorporated by reference to Exhibit 3.1 to the Registrant’s Current Report on Form 8-K (File No. 001-33097), filed September 27, 2019. 3.9 Articles Supplementary, incorporated by reference to Exhibit 3.1 to the Registrant’s Current Report on Form 8-K (File No. 001-33097), filed December 3, 2019. 3.10 Articles Supplementary for 6.00% Series F Cumulative Redeemable Preferred Stock, incorporated by reference to Exhibit 3.1 to the Registrant’s Current Report on Form 8-K (File No. 001-33097), filed February 20, 2020. 3.11 Articles Supplementary for 6.00% Series G Cumulative Redeemable Preferred Stock, incorporated by reference to Exhibit 3.1 to the Registrant’s Current Report on Form 8-K (File No. 001-33097), filed June 24, 2021. 3.12 Articles Supplementary, incorporated by reference to Exhibit 3.8 to the Registrant's Quarterly Report on Form 10-Q (File No. 001-33097), filed August 9, 2021. 4.1 Form of Certificate for Common Stock of the Registrant, incorporated by reference to Exhibit 4.1 to Pre-Effective Amendment No. 2 to the Registrant’s Registration Statement on Form S-11 (File No. 333-106024), filed August 8, 2003. 4.2 Form of Certificate for 6.625% Series E Cumulative Redeemable Preferred Stock of the Registrant, incorporated by reference to Exhibit 4.1 to the Registrant’s Current Report on Form 8-K (File No. 001-33097), filed September 27, 2019. 4.3 Form of Certificate for 6.00% Series F Cumulative Redeemable Preferred Stock of the Registrant, incorporated by reference to Exhibit 4.1 to the Registrant’s Current Report on Form 8-K (File No. 001-33097), filed February 20, 2020. 4.4 Form of Certificate for 6.00% Series G Cumulative Redeemable Preferred Stock, incorporated by reference to Exhibit 4.1 to the Registrant’s Current Report on Form 8-K (File No. 001-33097), filed June 24, 2021. 4.5 Form of Indenture, incorporated by reference to Exhibit 4.5 to the Registrant’s Registration Statement on Form S-3 (File No. 333-268549), filed November 23, 2022. 4.6 Form of 6.47% Senior Guaranteed Notes due December 18, 2029, included as Schedule 1 to the Note Purchase Agreement, incorporated by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K (File No. 001-33097), filed December 19, 2024. 4.7 Form of 5.99% Senior Guaranteed Notes due December 15, 2030, included as Schedule 1 to the Note Purchase Agreement, incorporated by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K (File No. 001-33097), filed December 15, 2025. 31.1* Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. 31.2* Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. 32.1** Certification of Chief Executive Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. 32.2** Certification of Chief Financial Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. 99.1* Estimated Value Methodology for Series F Cumulative Redeemable Preferred Stock and Senior Common Stock as of June 30, 2026. 101.INS*** iXBRL Instance Document 101.SCH*** iXBRL Taxonomy Extension Schema Document 101.CAL*** iXBRL Taxonomy Extension Calculation Linkbase Document 101.LAB*** iXBRL Taxonomy Extension Label Linkbase Document 101.PRE*** iXBRL Taxonomy Extension Presentation Linkbase Document 101.DEF*** iXBRL Definition Linkbase 104 Cover Page Interactive Data File (formatted in iXBRL and contained in Exhibit 101) 48 Table of Contents * Filed herewith ** Furnished herewith *** Attached as Exhibit 101 to this Quarterly Report on Form 10-Q are the following materials, formatted in iXBRL (eXtensible Business Reporting Language): (i) the Condensed Consolidated Balance Sheets as of June 30, 2026 and December 31, 2025, (ii) the Condensed Consolidated Statements of Operations and Comprehensive Income for the three and six months ended June 30, 2026 and 2025, (iii) the Condensed Consolidated Statements of Cash Flows for the six months ended June 30, 2026 and 2025 and (iv) the Notes to Condensed Consolidated Financial Statements. 49 Table of Contents SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. Gladstone Commercial Corporation Date: August 5, 2026 By: /s/ Gary Gerson Gary Gerson Executive Vice President and Chief Financial Officer Date: August 5, 2026 By: /s/ Arthur Cooper Arthur Cooper Chief Executive Officer and President 50