X0202 SCHEDULE 13G/A 0001103804 XXXXXXXX LIVE 2 Common Stock, par value $0.0001 per share 03/31/2026 0002007919 Inhibrx Biosciences, Inc. 45720N103 11025 N. Torrey Pines Road Suite 140 La Jolla CA La Jolla Rule 13d-1(c) VIKING GLOBAL INVESTORS LP b DE 0 1461633 0 1461633 1461633 N 9.99 PN See Item 4 Viking Global Opportunities Parent GP LLC b DE 0 1461633 0 1461633 1461633 N 9.99 OO See Item 4 Viking Global Opportunities GP LLC b DE 0 1358769 0 1358769 1358769 N 9.3 OO See Item 4 Viking Global Opportunities Portfolio GP LLC b DE 0 1291751 0 1291751 1291751 N 8.8 OO See Item 4 Viking Global Opportunities Illiquid Investments Sub-Master LP b E9 0 1291751 0 1291751 1291751 N 8.8 PN See Item 4 KAVRA 104 LLC b DE 0 67018 0 67018 67018 0.5 OO See Item 4 Viking Global Opportunities Drawdown GP LLC b DE 0 102864 0 102864 102864 0.7 OO See Item 4 Viking Global Opportunities Drawdown Portfolio GP LLC b DE 0 102864 0 102864 102864 0.7 OO See Item 4 Viking Global Opportunities Drawdown (Aggregator) LP b E9 0 102864 0 102864 102864 0.7 PN See Item 4 HALVORSEN OLE ANDREAS b Q8 0 1461633 0 1461633 1461633 9.99 IN See Item 4 Shabet Rose Sharon b X1 0 1461633 0 1461633 1461633 9.99 IN See Item 4 Inhibrx Biosciences, Inc. 11025 N. Torrey Pines Road, Suite 140, La Jolla, California, 92037 Viking Global Investors LP ("VGI"), Viking Global Opportunities Parent GP LLC ("Opportunities Parent"), Viking Global Opportunities GP LLC ("Opportunities GP"), Viking Global Opportunities Portfolio GP LLC ("Opportunities Portfolio GP"), Viking Global Opportunities Illiquid Investments Sub-Master LP ("VGOP"), KAVRA 104 LLC ("KAVRA 104"), Viking Global Opportunities Drawdown GP LLC ("VGOD GP"), Viking Global Opportunities Drawdown Portfolio GP LLC ("VGOD Portfolio GP"), Viking Global Opportunities Drawdown (Aggregator) LP ("VGOD"), O. Andreas Halvorsen and Rose S. Shabet (collectively, the "Reporting Persons") Effective March 31, 2026, David C. Ott ("Mr. Ott") retired from his roles as Advisory Director of VGI and Executive Committee Member of each of Viking Global Partners LLC (the general partner of VGI) and Opportunities Parent. Accordingly, this Amendment No. 2 is being filed to remove Mr. Ott as a Reporting Person from this Schedule 13G, as Mr. Ott is no longer a beneficial owner of any of the shares of Common Stock reported herein. The business address of each of the Reporting Persons is: 600 Washington Boulevard, Floor 11, Stamford, Connecticut 06901. VGI is a Delaware limited partnership; Opportunities Parent, Opportunities GP, Opportunities Portfolio GP, KAVRA 104, VGOD GP and VGOD Portfolio GP are Delaware limited liability companies; VGOP and VGOD are Cayman Islands exempted limited partnerships; O. Andreas Halvorsen is a citizen of Norway; and Rose S. Shabet is a citizen of the United States. Y This Statement on Schedule 13G relates to shares of Common Stock held directly by VGOP, KAVRA 104 and VGOD, and warrants to purchase shares of Common Stock with an exercise price of $0.0001 per share (the "Warrants") held directly by VGOP. VGOP directly owns 1,267,823 shares of Common Stock and Warrants with the right to purchase 259,692 shares of Common Stock. KAVRA 104 directly owns 67,018 shares of Common Stock. VGOD directly owns 102,864 shares of Common Stock. However, the terms of the Warrants provide that no holder of Warrants shall have the right to exercise any portion of the Warrants to the extent that, after giving effect to such issuance after exercise, such holder of Warrants (together with its affiliates, any "group" or any other persons whose beneficial ownership could be aggregated with the holders) would beneficially own more than 9.99% of the number of shares of Common Stock outstanding immediately following exercise (the "Blocker"). Any holder of Warrants, upon notice to the Issuer, may increase or decrease the Blocker, subject to a maximum of 19.99%, but any such increase or decrease will not be effective until the 61st day after such notice is delivered to the Issuer. Accordingly, the amount of shares of Common Stock reported as beneficially owned by the Reporting Persons set forth herein excludes shares of Common Stock that the Reporting Persons do not currently have the right to purchase upon exercise of the Warrants held directly by VGOP due to the Blocker. VGI: 1,461,633 VGI provides managerial services to VGOP, KAVRA 104 and VGOD. VGI has the authority to dispose of and vote the shares of Common Stock directly held by VGOP, KAVRA 104 and VGOD and the shares of Common Stock that VGOP has the right to purchase upon exercise of the Warrants. VGI does not directly own any shares of Common Stock or Warrants. Based on Rule 13d-3 under the Securities Exchange Act of 1934, as amended (the "Act"), VGI may be deemed to beneficially own the shares of Common Stock directly held by VGOP, KAVRA 104 and VGOD and the shares of Common Stock that VGOP has the right to purchase upon exercise of the Warrants. VGI beneficially owns 1,461,633 shares of Common Stock consisting of (i) 1,267,823 shares of Common Stock directly owned by VGOP, (ii) 67,018 shares of Common Stock directly owned by KAVRA 104, (iii) 102,864 shares of Common Stock directly owned by VGOD and (iv) 23,928 shares of Common Stock beneficially owned by VGOP, which VGOP has the right to purchase upon exercise of the Warrants, subject to the Blocker. Opportunities Parent: 1,461,633 Opportunities Parent is the sole member of Opportunities GP, which has the authority to dispose of and vote the shares of Common Stock controlled by Opportunities Portfolio GP (which consists of the shares of Common Stock that VGOP directly owns or has the right to purchase upon exercise of the Warrants), and KAVRA 104, and is the sole member of VGOD GP, which has the authority to dispose of and vote the shares of Common Stock controlled by VGOD Portfolio GP (which consists of the shares of Common Stock directly held by VGOD). Opportunities Parent does not directly own any shares of Common Stock or Warrants. Based on Rule 13d-3 under the Act, Opportunities Parent may be deemed to beneficially own the shares of Common Stock directly held by VGOP, KAVRA 104 and VGOD and the shares of Common Stock that VGOP has the right to purchase upon exercise of the Warrants. Opportunities Parent beneficially owns 1,461,633 shares of Common Stock consisting of (i) 1,267,823 shares of Common Stock directly owned by VGOP, (ii) 67,018 shares of Common Stock directly owned by KAVRA 104, (iii) 102,864 shares of Common Stock directly owned by VGOD and (iv) 23,928 shares of Common Stock beneficially owned by VGOP, which VGOP has the right to purchase upon exercise of the Warrants, subject to the Blocker. Opportunities GP: 1,358,769 Opportunities GP serves as the sole member of Opportunities Portfolio GP and has the authority to dispose of and vote the shares of Common Stock controlled by Opportunities Portfolio GP, which consists of the shares of Common Stock that VGOP directly owns or has the right to purchase upon exercise of the Warrants. In addition, Opportunities GP is the general partner of each of Viking Global Opportunities Intermediate LP, Viking Global Opportunities III LP, and Viking Global Opportunities LP. The membership interests of KAVRA 104 are held by Viking Global Opportunities Intermediate LP and Viking Global Opportunities LP. Accordingly, Opportunities GP has the authority to dispose of and vote the shares of Common Stock directly held by KAVRA 104. Opportunities GP does not directly own any shares of Common Stock or Warrants. Based on Rule 13d-3 under the Act, Opportunities GP may be deemed to beneficially own the shares of Common Stock directly held by VGOP and KAVRA 104 and the shares of Common Stock that VGOP has the right to purchase upon exercise of the Warrants. Opportunities GP beneficially owns 1,358,769 shares of Common Stock consisting of (i) 1,267,823 shares of Common Stock directly owned by VGOP, (ii) 67,018 shares of Common Stock directly owned by KAVRA 104 and (iii) 23,928 shares of Common Stock beneficially owned by VGOP, which VGOP has the right to purchase upon exercise of the Warrants, subject to the Blocker. Opportunities Portfolio GP: 1,291,751 Opportunities Portfolio GP serves as the general partner of VGOP and has the authority to dispose of and vote the shares of Common Stock that VGOP directly owns or has the right to purchase upon exercise of the Warrants. Opportunities Portfolio GP does not directly own any shares of Common Stock or Warrants. Based on Rule 13d-3 under the Act, Opportunities Portfolio GP may be deemed to beneficially own the shares of Common Stock that VGOP directly owns or has the right to purchase upon exercise of the Warrants. Opportunities Portfolio GP beneficially owns 1,291,751 shares of Common Stock consisting of 1,267,823 shares of Common Stock directly owned by VGOP and 23,928 shares of Common Stock beneficially owned by VGOP, which VGOP has the right to purchase upon exercise of the Warrants, subject to the Blocker. VGOP: 1,291,751 VGOP has the authority to dispose of and vote the shares of Common Stock that it directly owns or has the right to purchase upon exercise of the Warrants directly owned by it, subject to the Blocker, which power may be exercised by its general partner, Opportunities Portfolio GP, and by VGI, an affiliate of Opportunities Portfolio GP, which provides managerial services to VGOP. Viking Global Opportunities LP (a Delaware limited partnership) and Viking Global Opportunities III LP (a Cayman Islands exempted limited partnership), through its investment in Viking Global Opportunities Intermediate LP (a Cayman Islands exempted limited partnership), invest substantially all of their assets in Viking Global Opportunities Master LP (a Cayman Islands exempted limited partnership), which in turn invests through VGOP. KAVRA 104: 67,018 KAVRA 104 has the authority to dispose of and vote the shares of Common Stock directly owned by it, which power may be exercised by Opportunities GP and its sole member, Opportunities Parent, and by VGI, an affiliate of Opportunities GP, which provides managerial services to KAVRA 104. The membership interests of KAVRA 104 are held by Viking Global Opportunities Intermediate LP and Viking Global Opportunities LP. Opportunities GP is the general partner of each of Viking Global Opportunities LP and Viking Global Opportunities Intermediate LP. VGOD GP: 102,864 VGOD GP serves as the sole member of VGOD Portfolio GP and has the authority to dispose of and vote the shares of Common Stock controlled by VGOD Portfolio GP, which consists of the shares of Common Stock that VGOD directly owns. In addition, VGOD GP is the general partner of each of Viking Global Opportunities Drawdown (Onshore) LP and Viking Global Opportunities Drawdown (Offshore) LP. VGOD GP does not directly own any shares of Common Stock or Warrants. Based on Rule 13d-3 under the Act, VGOD GP may be deemed to beneficially own the shares of Common Stock that VGOD directly owns. VGOD GP beneficially owns 102,864 shares of Common Stock consisting of 102,864 shares of Common Stock directly owned by VGOD. VGOD Portfolio GP: 102,864 VGOD Portfolio GP serves as the general partner of VGOD and has the authority to dispose of and vote the shares of Common Stock that VGOD directly owns. VGOD Portfolio GP does not directly own any shares of Common Stock or Warrants. Based on Rule 13d-3 under the Act, VGOD Portfolio GP may be deemed to beneficially own the shares of Common Stock that VGOD directly owns. VGOD Portfolio GP beneficially owns 102,864 shares of Common Stock consisting of 102,864 shares of Common Stock directly owned by VGOD. VGOD: 102,864 VGOD has the authority to dispose of and vote the 102,864 shares of Common Stock that it directly owns, which power may be exercised by its general partner, VGOD Portfolio GP, and by VGI, an affiliate of VGOD Portfolio GP, which provides managerial services to VGOD. Viking Global Opportunities Drawdown (Offshore) LP (a Cayman Islands exempted limited partnership) and Viking Global Opportunities Drawdown (Onshore) LP (a Delaware limited partnership) invest substantially all of their assets in VGOD. O. Andreas Halvorsen and Rose S. Shabet: 1,461,633 Mr. Halvorsen and Ms. Shabet, as Executive Committee Members of Viking Global Partners LLC (general partner of VGI) and Opportunities Parent, have shared authority to dispose of and vote the shares of Common Stock beneficially owned by VGI and Opportunities Parent. Neither Mr. Halvorsen nor Ms. Shabet directly owns any shares of Common Stock or Warrants. Based on Rule 13d-3 under the Act, each may be deemed to beneficially own the shares of Common Stock directly held by VGOP, KAVRA 104 and VGOD and the shares of Common Stock that VGOP has the right to purchase upon exercise of the Warrants. Mr. Halvorsen and Ms. Shabet each beneficially own 1,461,633 shares of Common Stock consisting of (i) 1,267,823 shares of Common Stock directly owned by VGOP, (ii) 67,018 shares of Common Stock directly owned by KAVRA 104, (iii) 102,864 shares of Common Stock directly owned by VGOD and (iv) 23,928 shares of Common Stock beneficially owned by VGOP, which VGOP has the right to purchase upon exercise of the Warrants, subject to the Blocker. The percentages set forth herein are based on (i) 14,607,036 shares of Common Stock outstanding as of March 11, 2026, as reported by the Issuer in its annual report on Form 10-K, filed with the U.S. Securities and Exchange Commission (the "Commission") on March 19, 2026, and (ii) 23,928 shares of Common Stock that the Reporting Persons currently have the right to purchase upon exercise of the Warrants, subject to the Blocker. VGI: 9.99% Opportunities Parent: 9.99% Opportunities GP: 9.3% Opportunities Portfolio GP: 8.8% VGOP: 8.8% KAVRA 104: 0.5% VGOD GP: 0.7% VGOD Portfolio GP: 0.7% VGOD: 0.7% O. Andreas Halvorsen and Rose S. Shabet: 9.99% VGI: 0 Opportunities Parent: 0 Opportunities GP: 0 Opportunities Portfolio GP: 0 VGOP: 0 KAVRA 104: 0 VGOD GP: 0 VGOD Portfolio GP: 0 VGOD: 0 O. Andreas Halvorsen and Rose S. Shabet: 0 VGI: 1,461,633 Opportunities Parent: 1,461,633 Opportunities GP: 1,358,769 Opportunities Portfolio GP: 1,291,751 VGOP: 1,291,751 KAVRA 104: 67,018 VGOD GP: 102,864 VGOD Portfolio GP: 102,864 VGOD: 102,864 O. Andreas Halvorsen and Rose S. Shabet: 1,461,633 VGI: 0 Opportunities Parent: 0 Opportunities GP: 0 Opportunities Portfolio GP: 0 VGOP: 0 KAVRA 104: 0 VGOD GP: 0 VGOD Portfolio GP: 0 VGOD: 0 O. Andreas Halvorsen and Rose S. Shabet: 0 VGI: 1,461,633 Opportunities Parent: 1,461,633 Opportunities GP: 1,358,769 Opportunities Portfolio GP: 1,291,751 VGOP: 1,291,751 KAVRA 104: 67,018 VGOD GP: 102,864 VGOD Portfolio GP: 102,864 VGOD: 102,864 O. Andreas Halvorsen and Rose S. Shabet: 1,461,633 Y N The response to Item 4 is incorporated by reference herein. 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. EXHIBIT A - JOINT FILING AGREEMENT VIKING GLOBAL INVESTORS LP /s/ Scott M. Hendler 05/15/2026 Viking Global Opportunities Parent GP LLC /s/ Scott M. Hendler 05/15/2026 Viking Global Opportunities GP LLC /s/ Scott M. Hendler 05/15/2026 Viking Global Opportunities Portfolio GP LLC /s/ Scott M. Hendler 05/15/2026 Viking Global Opportunities Illiquid Investments Sub-Master LP /s/ Scott M. Hendler 05/15/2026 KAVRA 104 LLC /s/ Scott M. Hendler 05/15/2026 Viking Global Opportunities Drawdown GP LLC /s/ Scott M. Hendler 05/15/2026 Viking Global Opportunities Drawdown Portfolio GP LLC /s/ Scott M. Hendler 05/15/2026 Viking Global Opportunities Drawdown (Aggregator) LP /s/ Scott M. Hendler 05/15/2026 HALVORSEN OLE ANDREAS /s/ Scott M. Hendler 05/15/2026 Shabet Rose Sharon /s/ Scott M. Hendler 05/15/2026 (1) Scott M. Hendler is signing on behalf of O. Andreas Halvorsen, individually and as an Executive Committee Member of VIKING GLOBAL PARTNERS LLC, on behalf of VIKING GLOBAL INVESTORS LP (for itself and as manager of KAVRA 104 LLC), and as an Executive Committee Member of VIKING GLOBAL OPPORTUNITIES PARENT GP LLC, on behalf of itself and VIKING GLOBAL OPPORTUNITIES GP LLC, VIKING GLOBAL OPPORTUNITIES PORTFOLIO GP LLC, VIKING GLOBAL OPPORTUNITIES ILLIQUID INVESTMENTS SUB-MASTER LP, VIKING GLOBAL OPPORTUNITIES DRAWDOWN GP LLC, VIKING GLOBAL OPPORTUNITIES DRAWDOWN PORTFOLIO GP LLC and VIKING GLOBAL OPPORTUNITIES DRAWDOWN (AGGREGATOR) LP, pursuant to an authorization and designation letter dated February 9, 2021, which was previously filed with the Commission as an exhibit to a Form 13G filed by Mr. Halvorsen on February 12, 2021 (SEC File No. 005-49737). (2) Scott M. Hendler is signing on behalf of Rose S. Shabet, individually and as an Executive Committee Member of VIKING GLOBAL PARTNERS LLC, on behalf of VIKING GLOBAL INVESTORS LP (for itself and as manager of KAVRA 104 LLC), and as an Executive Committee Member of VIKING GLOBAL OPPORTUNITIES PARENT GP LLC, on behalf of itself and VIKING GLOBAL OPPORTUNITIES GP LLC, VIKING GLOBAL OPPORTUNITIES PORTFOLIO GP LLC, VIKING GLOBAL OPPORTUNITIES ILLIQUID INVESTMENTS SUB-MASTER LP, VIKING GLOBAL OPPORTUNITIES DRAWDOWN GP LLC, VIKING GLOBAL OPPORTUNITIES DRAWDOWN PORTFOLIO GP LLC and VIKING GLOBAL OPPORTUNITIES DRAWDOWN (AGGREGATOR) LP, pursuant to an authorization and designation letter dated February 9, 2021, which was previously filed with the Commission as an exhibit to a Form 13G filed by Mr. Halvorsen on February 12, 2021 (SEC File No. 005-49737).