X0202 SCHEDULE 13G/A 0001224962 XXXXXXXX LIVE 1 Common Stock, par value $0.0001 03/31/2026 0002007919 INHIBRX BIOSCIENCES, INC. 45720N103 11025 N. Torrey Pines Road, Suite 140 Suite 1200 La Jolla CA 92037 Rule 13d-1(c) Perceptive Advisors LLC b DE 0 1461105 0 1461105 1461105 N 9.99 IA Joseph Edelman b X1 0 1461105 0 1461105 1461105 N 9.99 IN Perceptive Life Sciences Master Fund, Ltd. b E9 0 1461105 0 1461105 1461105 N 9.99 CO INHIBRX BIOSCIENCES, INC. 11025 N. Torrey Pines Road, Suite 140, La Jolla, California, 92037 The names of the persons filing this report (collectively, the "Reporting Persons") with respect to shares of Common Stock, par value $0.0001 (the "Common Stock") of INHIBRX BIOSCIENCES, INC. (the "Issuer") are: (i) Perceptive Advisors LLC ("Perceptive Advisors") (ii) Joseph Edelman ("Mr. Edelman") (iii) Perceptive Life Sciences Master Fund, Ltd. (the "Master Fund") The address of the principal business office of each of the Reporting Persons is: 51 Astor Place, 10th Floor, New York, NY 10003 Perceptive Advisors is a Delaware limited liability company. Mr. Edelman is a United States citizen. The Master Fund is a Cayman Islands corporation. Y The information required by this item with respect to each Reporting Person is set forth in Rows 5 through 9 and 11 of the cover pages to this Schedule 13G. The ownership percentages reported are based on 14,607,286 outstanding shares of Common Stock as of April 7, 2026, as reported in the Issuer's Proxy Statement on Schedule 14A filed with the Securities and Exchange Commission on April 23, 2026, and assumes the exercise of pre-funded warrants held by the Reporting Persons for 18,398 shares of Common Stock. Neither Perceptive Advisors nor Mr. Edelman directly holds any Common Stock. The Master Fund directly holds 1,442,707 shares of Common Stock and 732,157 pre-funded warrants (the "Pre-Funded Warrants") immediately exercisable for shares of Common Stock at an exercise price of $0.0001 per share, subject to the Beneficial Ownership Limitation (as defined below). The terms of the Pre-Funded Warrants provide that the Pre-Funded Warrants may not be exercised if, after such exercise, the Reporting Persons would beneficially own, as determined in accordance with Section 13(d) if the Securities Exchange Act of 1934, as amended, more than 9.99% of the shares of Common Stock then issued and outstanding after giving effect to such exercise (the "Beneficial Ownership Limitation"). As of the date hereof, the Beneficial Ownership Limitation permits the Reporting Persons to exercise Pre-Funded Warrants for an aggregate of not more than 18,398 shares of Common Stock. In providing the beneficial ownership information set forth herein, the Reporting Persons have assumed that the aggregate remaining Pre-Funded Warrants held by the Reporting Persons are not exercisable due to the Beneficial Ownership Limitation. Perceptive Advisors serves as the investment manager to the Master Fund and may be deemed to beneficially own such shares. Mr. Edelman is the managing member of Perceptive Advisors and may be deemed to beneficially own such shares. Perceptive Advisors: 9.99% Mr. Edelman: 9.99% Master Fund: 9.99% Perceptive Advisors: 0 Mr. Edelman: 0 Master Fund: 0 Perceptive Advisors: 1,461,105 Mr. Edelman: 1,461,105 Master Fund: 1,461,105 Perceptive Advisors: 0 Mr. Edelman: 0 Master Fund: 0 Perceptive Advisors: 1,461,105 Mr. Edelman: 1,461,105 Master Fund: 1,461,105 Y Y Y Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above 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. Perceptive Advisors LLC /s/ Joseph Edelman 05/15/2026 Joseph Edelman /s/ Joseph Edelman 05/15/2026 Perceptive Life Sciences Master Fund, Ltd. /s/ Joseph Edelman 05/15/2026