HELIX ENERGY SOLUTIONS GROUP INC 10-Q

Item 5. Other Information (c) During the three-month period ended June 30, 2025, no director or “officer” of Helix adopted or terminated a “Rule 10 b5-1 trading arrangement” or “non-Rule 10 b5-1 trading arrangement,” as each term is defined in Item 408 (a) of Regulation S-K. ​ 40 Table of Contents Item 6. Exhibits ​ ​ ​ ​ ​ ​ Exhibit Number Description Filed or Furnished Herewith or Incorporated by Reference from the Following Documents (Registration or File Number) 3.1 ​ 2005 Amended and Restated Articles of Incorporation, as amended, of Helix Energy Solutions Group, Inc. ​ Exhibit 3.1 to the Current Report on Form 8-K filed on March 1, 2006 (000-22739) 3.2 ​ Second Amended and Restated By-Laws of Helix Energy Solutions Group, Inc., as amended. ​ Exhibit 3.1 to the Current Report on Form 8-K filed on September 28, 2006 (001-32936) 31.1 ​ Certification Pursuant to Rule 13a-14(a) under the Securities Exchange Act of 1934 by Owen Kratz, Chief Executive Officer. ​ Filed herewith 31.2 ​ Certification Pursuant to Rule 13a-14(a) under the Securities Exchange Act of 1934 by Erik Staffeldt, Chief Financial Officer. ​ Filed herewith 32.1 ​ Certification of Helix’s Chief Executive Officer and Chief Financial Officer pursuant to Section 906 of the Sarbanes–Oxley Act of 2002. ​ Furnished herewith 101.INS ​ XBRL Instance Document. ​ The instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document 101.SCH ​ Inline XBRL Taxonomy Extension Schema Document. ​ Filed herewith 101.CAL ​ Inline XBRL Taxonomy Extension Calculation Linkbase Document. ​ Filed herewith 101.DEF ​ Inline XBRL Taxonomy Extension Definition Linkbase Document. ​ Filed herewith 101.LAB ​ Inline XBRL Taxonomy Extension Label Linkbase Document. ​ Filed herewith 101.PRE ​ Inline XBRL Taxonomy Extension Presentation Linkbase Document. ​ Filed herewith 104 ​ Cover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101). ​ Filed herewith ​ ​ ​ 41 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. ​ ​ ​ ​ ​ ​ ​ HELIX ENERGY SOLUTIONS GROUP, INC. ​ ​ ​ (Registrant) ​ ​ ​ Date: July 24, 2025 ​ By: /s/ Owen Kratz ​ ​ ​ Owen Kratz ​ ​ ​ President and Chief Executive Officer ​ ​ ​ (Principal Executive Officer) ​ ​ ​ ​ Date: July 24, 2025 ​ By: /s/ Erik Staffeldt ​ ​ ​ Erik Staffeldt ​ ​ ​ Executive Vice President and ​ ​ ​ Chief Financial Officer ​ ​ ​ (Principal Financial Officer) ​ ​ ​ ​ 42