Statement of Changes in Beneficial Ownership (Form 4)

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b). Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person * VIKING GLOBAL INVESTORS LP 2. Issuer Name and Ticker or Trading Symbol Inhibrx Biosciences, Inc. [INBX] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director __X__ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 600 WASHINGTON BLVD., FLOOR 11 3. Date of Earliest Transaction (Month/Day/Year) 10/07/2025 (Street) STAMFORD, CT 06901 4. If Amendment, Date Original Filed (Month/Day/Year) 6. Individual or Joint/Group Filing (Check Applicable Line) ___ Form filed by One Reporting Person _X_ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 10/07/2025 S 308,643 D $32.25 1,267,823 I See Explanation of Responses(1)(2)(3)(6) Common Stock 10/07/2025 S 16,315 D $32.25 67,018 I See Explanation of Responses(1)(2)(4)(6) Common Stock 10/07/2025 S 25,042 D $32.25 102,864 I See Explanation of Responses(1)(2)(5)(6)

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
VIKING GLOBAL INVESTORS LP 600 WASHINGTON BLVD. FLOOR 11 STAMFORD, CT 06901		X
Viking Global Opportunities Parent GP LLC 600 WASHINGTON BLVD. FLOOR 11 STAMFORD, CT 06901		X
Viking Global Opportunities GP LLC 600 WASHINGTON BLVD. FLOOR 11 STAMFORD, CT 06901		X
Viking Global Opportunities Portfolio GP LLC 600 WASHINGTON BLVD. FLOOR 11 STAMFORD, CT 06901		X
Viking Global Opportunities Illiquid Investments Sub-Master LP 600 WASHINGTON BLVD. FLOOR 11 STAMFORD, CT 06901		X
HALVORSEN OLE ANDREAS 600 WASHINGTON BLVD. FLOOR 11 STAMFORD, CT 06901		X
Ott David C. 600 WASHINGTON BLVD. FLOOR 11 STAMFORD, CT 06901		X
Shabet Rose Sharon 600 WASHINGTON BLVD. FLOOR 11 STAMFORD, CT 06901		X

Signatures

/s/ Scott M. Hendler signing on behalf of O. Andreas Halvorsen (7)(8)		10/09/2025
**Signature of Reporting Person		Date
/s/ Scott M. Hendler signing on behalf of David C. Ott (7)(8)		10/09/2025
**Signature of Reporting Person		Date
/s/ Scott M. Hendler signing on behalf of Rose S. Shabet (7)(8)		10/09/2025
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	Andreas Halvorsen, David C. Ott and Rose S. Shabet are Executive Committee members of certain management entities, including Viking Global Partners LLC, the general partner of Viking Global Investors LP ("VGI"), and Viking Global Opportunities Parent GP LLC ("Opportunities Parent"), the sole member of Viking Global Opportunities GP LLC ("Opportunities GP"), the sole member of Viking Global Opportunities Portfolio GP LLC ("Opportunities Portfolio GP"), the general partner of Viking Global Opportunities Illiquid Investments Sub-Master LP ("Opportunities Fund"). Opportunities Parent is also the sole member of Viking Global Opportunities Drawdown GP LLC ("VGOD GP"), the sole member of Viking Global Opportunities Drawdown Portfolio GP LLC ("VGOD Portfolio GP"), the general partner of Viking Global Opportunities Drawdown (Aggregator) LP ("VGOD").
(2)	VGI provides managerial services to various investment funds and vehicles, including Opportunities Fund, VGOD, and KAVRA 104 LLC ("KAVRA 104"). VGI, Opportunities Parent, Opportunities GP, Opportunities Portfolio GP, Opportunities Fund, Mr. Halvorsen, Mr. Ott and Ms. Shabet are, collectively, the "Reporting Persons." Each of VGI, Mr. Halvorsen, Mr. Ott and Ms. Shabet may be deemed to beneficially own all of the securities reported on this form.
(3)	These shares of Common Stock are held directly by Opportunities Fund. Because of the relationship between Opportunities Portfolio GP, Opportunities GP, Opportunities Parent and Opportunities Fund, each of Opportunities Portfolio GP, Opportunities GP and Opportunities Parent may be deemed to beneficially own the securities held directly by Opportunities Fund.
(4)	These shares of Common Stock are held directly by KAVRA 104. The membership interests of KAVRA 104 are held by Viking Global Opportunities LP and Viking Global Opportunities Intermediate LP. Opportunities GP is the general partner of Viking Global Opportunities LP and Viking Global Opportunities Intermediate LP. Because of the relationship between Opportunities GP, Opportunities Parent and KAVRA 104, each of Opportunities GP and Opportunities Parent may be deemed to beneficially own the shares of Common Stock held directly by KAVRA 104.
(5)	These shares of Common Stock are held directly by VGOD. Because of the relationship between Opportunities Parent and VGOD, Opportunities Parent may be deemed to beneficially own the shares of Common Stock held directly by VGOD.
(6)	The Reporting Persons disclaim beneficial ownership of these securities except to the extent of their pecuniary interest therein, and the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of the reported securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or for any other purpose.
Remarks: (7) The Reporting Persons are jointly filing this Form 4 pursuant to Rule 16a-3(j) under the Exchange Act. (8) Scott M. Hendler is signing on behalf of Mr. Halvorsen, Mr. Ott and Ms. Shabet, each individually and as an Executive Committee Member of VIKING GLOBAL PARTNERS LLC, on behalf of VIKING GLOBAL INVESTORS LP, 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 and VIKING GLOBAL OPPORTUNITIES ILLIQUID INVESTMENTS SUB-MASTER LP, pursuant to authorization and designation letters dated February 9, 2021, which were filed with the Securities and Exchange Commission on June 7, 2021.

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