Company: HLX
Filing Date: 2025-10-28
Form Type: S-3ASR
Source: 0001140361-25-039546
Chunk: 0

Company: HELIX ENERGY SOLUTIONS GROUP INC
Filing Date: 2025-10-28
Form: S-3ASR
Chunk 0
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TABLE OF CONTENTS As filed with the Securities and Exchange Commission on October 28, 2025 Registration No. 333-

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-3 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 Helix Energy Solutions Group, Inc. ( Exact name of registrant as specified in its charter )

| Minnesota                                                      |     | 3505 West Sam Houston Parkway North, Suite 400 |     | 95-3409686            |
| (State or other jurisdiction of incorporation or organization) |     | Houston, Texas 77043                           
 (281) 618-0400                                 |     | -IRS Employer         
 Identification Number |

( Address, including zip code, and telephone number, including area code, of registrant’s principal executive offices) Kenneth E. Neikirk Executive Vice President, General Counsel and Corporate Secretary Helix Energy Solutions Group, Inc. 3505 West Sam Houston Parkway North, Suite 400 Houston, Texas 77043 (281) 618-0400 ( Name, address, including zip code, and telephone number, including area code, of agent for service ) Copies of all communications, including communications sent to agent for service, should be sent to: Travis Wofford Douglas V. Getten Baker Botts L.L.P. 910 Louisiana Street Houston, Texas 77002 (713) 229-1234 Approximate date of commencement of proposed sale to the public : From time to time after this registration statement becomes effective. If the only securities being registered on this Form are being offered pursuant to dividend or interest reinvestment plans, please check the following box:☐ If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, other than securities offered only in connection with dividend or interest reinvestment plans, check the following box: ☒ If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.☐ If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.☐ If this Form is a registration statement pursuant to General