HELIX ENERGY SOLUTIONS GROUP, INC.

Shareholder information available for Helix Energy Solutions Group, Inc. (SEC CIK 0000866829), dated on or around September 4, 2026, discloses five institutional holdings in the company’s common stock: Vanguard Group Inc, reported at approximately 12.43% of shares outstanding; iShares Trust – iShares Core S&P Small-Cap ETF, at approximately 7.75%; iShares Trust – iShares Russell 2000 ETF, at approximately 3.37%; Principal Financial Group, Inc., at approximately 4.50%; and Principal Funds, Inc. – SmallCap Fund, at approximately 1.83%. These are institutional asset managers and index-tracking funds of the kind that periodically disclose positions in U.S. exchange-listed shares once they cross reporting thresholds, rather than founders, family holders or a single controlling shareholder.

No individual holding approaches a majority or controlling stake, and no ultimate beneficial owner is identified in the available records. As a New York Stock Exchange-listed company, Helix Energy Solutions Group, Inc.’s stock was widely held by the investing public, so the institutional positions above represent only the major shareholders identifiable at the reporting date rather than the company’s complete shareholder base.

Shareholder disclosure for this company is best characterised as major shareholders only. Because Helix Energy Solutions Group, Inc. completed an all-stock combination with Hornbeck Offshore Services, Inc. on September 1, 2026, ownership of the renamed, combined entity may have changed materially from the position shown above, and more recent institutional filings should be consulted for the current position.

Officer records available for Helix Energy Solutions Group, Inc. disclose five officers shown with active status: Kenneth Neikirk, recorded as Executive Vice President, General Counsel and Corporate Secretary; Angie Wickert, Deputy General Counsel, Sustainability & Compliance Officer and Assistant Secretary; Leigh Beck, Vice President and Chief Technical Officer; Fred Vleghert, Managing Director of the company’s Brazilian operating subsidiary, Helix do Brasil Serviços de Petróleo Ltda.; and Stephen Wren, Chief Information Officer. Mr. Neikirk’s role is independently corroborated by the company’s own U.S. Securities and Exchange Commission filings. Appointment and resignation dates are not disclosed for any of these officers in the available records, and the underlying source indicates additional officer records exist beyond those captured here.

Nationality is not disclosed for any of the officers named above. The country field recorded against each of them reflects a U.S. correspondence/registered-office address rather than a residence or nationality, and should not be read as either.

Owen Kratz served as President and Chief Executive Officer of Helix Energy Solutions Group, Inc.; on December 17, 2025 he informed the board of his intention to retire, continuing to serve until a successor was appointed. Other officers separately confirmed through the company’s own investor-relations disclosures include Erik Staffeldt, Executive Vice President and Chief Financial Officer, and Scotty Sparks, Executive Vice President and Chief Operating Officer. Following completion of the September 1, 2026 combination with Hornbeck Offshore Services, Inc., Todd M. Hornbeck became President and Chief Executive Officer of the combined, renamed company, and William L. Transier continued as Chairman of the Board.

Officer information for this company is best described as partial: only a portion of the disclosed officer population is detailed here, historical appointment dates are not available, and nationality is not published for any individual.

Helix Energy Solutions Group, Inc. (SEC CIK 0000866829) was the ultimate parent of its corporate group; no external parent company is identified in official filings. The company’s Form 10-K for the year ended December 31, 2023 (Exhibit 21.1) lists more than fifty subsidiaries incorporated across the United States (Texas, Louisiana and Delaware), Scotland, Luxembourg, Norway, Singapore, Australia, Mexico, Brazil and the Cayman Islands, reflecting the group’s international offshore energy-services operations.

Direct and indirect subsidiaries confirmed both in the company’s own corporate-linkage data and in its SEC Exhibit 21.1 filing include Helix Oil & Gas (U.K.) Limited (Scotland), Helix Robotics Solutions, Inc. (Texas) together with its Scottish subsidiary Helix Robotics Solutions Limited, Helix Well Ops Inc. (Texas) and its associated Helix Well Ops (U.K.) Limited (Scotland), Helix Offshore International, Inc. (Texas), Energy Resource Technology (U.K.) Limited (Scotland) and its subsidiary ERT Camelot Limited, Kommandor LLC (Delaware), Alliance Offshore, LLC (Louisiana), and Helix do Brasil Serviços de Petróleo Ltda. (Brazil). Ownership percentages are not disclosed for most group entities in the reviewed sources; the SEC filing states that Independence Hub, LLC was approximately 20% owned.

On September 1, 2026, Helix Energy Solutions Group, Inc. completed a previously announced all-stock business combination with Hornbeck Offshore Services, Inc. Rather than creating a new parent-subsidiary relationship, the transaction resulted in the same legal entity continuing in existence under the new name Hornbeck Offshore Services, Inc., with shares trading on the New York Stock Exchange under the symbol “HOS” from September 2, 2026; former Hornbeck securityholders held approximately 55% and former Helix shareholders approximately 45% of the combined company on a fully diluted basis.

Corporate-linkage information for this company is best described as full for its pre-combination U.S. SEC-reported subsidiary structure, though the group’s composition should be treated as subject to change following the September 2026 combination with Hornbeck Offshore Services, Inc. Sources: U.S. Securities and Exchange Commission, Form 10-K for fiscal year 2023, Exhibit 21.1 (filed February 29, 2024, sec.gov/Archives/edgar/data/866829/000086682924000007/hlx-20231231xex21d1.htm); company corporate-linkage records dated September 2026; Hornbeck/Helix merger completion announcements (September 1–2, 2026, oedigital.com and worldoil.com).