X0202 SCHEDULE 13G 0001940272 XXXXXXXX LIVE Class A ordinary shares, par value $0.0001 per share 03/31/2026 0002099656 Helix Acquisition Corp. III G4444S107 200 Clarendon Street 52nd Floor Boston MA 02116 Rule 13d-1(b) ADAR1 Capital Management, LLC b TX 0.00 1000000.00 0.00 1000000.00 1000000.00 N 5.6 IA OO Includes (i) 875,306 Class A ordinary shares, par value $0.0001 per share ("Ordinary Shares") held by ADAR1 Partners, LP and (ii) 124,694 Ordinary Shares held by Spearhead Insurance Solutions IDF, LLC as of March 31, 2026. As the investment manager of ADAR1 Partners, LP and as the sub-advisor of Spearhead Insurance Solutions IDF, LLC, ADAR1 Capital Management, LLC may be deemed to indirectly beneficially own securities held by ADAR1 Partners, LP and Spearhead Insurance Solutions IDF, LLC. Based on 17,747,500 Ordinary Shares of Helix Acquisition Corp. III (the "Issuer") outstanding as of March 31, 2026, reported in the Issuer's Form 10Q for the quarter ended March 31, 2026, filed with the Securities and Exchange Commission on May 15, 2026. Daniel Schneeberger b V8 0.00 1000000.00 0.00 1000000.00 1000000.00 N 5.6 HC IN Includes (i) 875,306 Class A ordinary shares, par value $0.0001 per share ("Ordinary Shares") held by ADAR1 Partners, LP and (ii) 124,694 Ordinary Shares held by Spearhead Insurance Solutions IDF, LLC as of March 31, 2026. As the manager of ADAR1 Capital Management, LLC, Mr. Schneeberger may be deemed to indirectly beneficially own securities held by ADAR1 Partners, LP and Spearhead Insurance Solutions IDF, LLC. Based on 17,747,500 Ordinary Shares of Helix Acquisition Corp. III (the "Issuer") outstanding as of March 31, 2026, reported in the Issuer's Form 10Q for the quarter ended March 31, 2026, filed with the Securities and Exchange Commission on May 15, 2026. Helix Acquisition Corp. III 200 Clarendon Street, 52nd Floor, Boston, MA 02116 This Schedule is being filed on behalf of each of the following persons (each, a "Reporting Person" and collectively, the "Reporting Persons"): (i) ADAR1 Capital Management, LLC ("ADAR1 Capital Management"); and (ii) Daniel Schneeberger ("Mr. Schneeberger"). The address of the principal business office of each of the Reporting Persons is 3503 Wild Cherry Drive, Building 9, Austin, Texas 78738. (i) ADAR1 Capital Management is a Texas limited liability company; and (ii) Mr. Schneeberger is a citizen of Switzerland. N IA HC The information contained on the cover pages of this Schedule 13G is incorporated herein by reference. The information contained on the cover pages of this Schedule 13G is incorporated herein by reference. The information contained on the cover pages of this Schedule 13G is incorporated herein by reference. The information contained on the cover pages of this Schedule 13G is incorporated herein by reference. The information contained on the cover pages of this Schedule 13G is incorporated herein by reference. The information contained on the cover pages of this Schedule 13G is incorporated herein by reference. Y Y N Mr. Schneeberger is filing this Schedule 13G as a control person in respect of shares beneficially owned by ADAR1 Capital Management, an investment adviser as described in SS 240.13d-1(b)(1)(ii)(E). Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11. Exhibit A: Joint Filing Agreement ADAR1 Capital Management, LLC /s/ Daniel Schneeberger 05/15/2026 Daniel Schneeberger /s/ Daniel Schneeberger 05/15/2026