Sec Form 4 Filing - VIKING GLOBAL INVESTORS LP @ Inhibrx, Inc. - 2023-08-28

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person VIKING GLOBAL INVESTORS LP 2. Issuer Name and Ticker or Trading Symbol Inhibrx, 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) 55 RAILROAD AVENUE 3. Date of Earliest Transaction (MM/DD/YY) 08/28/2023 (Street) GREENWICH, CT06830 4. If Amendment, Date Original Filed (MM/DD/YY) 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 (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 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 08/28/2023 P 511,627 A $ 19.35 511,627 I See Explanation of Responses ( 1 ) ( 2 ) ( 3 ) ( 7 ) Common Stock 2,427,307 I See Explanation of Responses ( 1 ) ( 2 ) ( 4 ) ( 7 ) Common Stock 333,333 I See Explanation of Responses ( 1 ) ( 2 ) ( 5 ) ( 7 ) Common Stock 3,878,559 I See Explanation of Responses ( 1 ) ( 2 ) ( 6 ) ( 7 )

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 (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 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 (MM/DD/YY) 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 Warrants (right to buy) $ 0.0001 08/28/2023 P 1,038,765 ( 8 ) ( 9 ) Common Stock 1,038,765 $ 19.3499 1,038,765 I See Explanation of Responses ( 1 ) ( 2 ) ( 4 ) ( 7 )

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other VIKING GLOBAL INVESTORS LP 55 RAILROAD AVENUE GREENWICH, CT06830 X Viking Global Opportunities GP LLC 55 RAILROAD AVENUE GREENWICH, CT06830 X Viking Global Opportunities Parent GP LLC 55 RAILROAD AVE GREENWICH, CT06830 X HALVORSEN OLE ANDREAS 55 RAILROAD AVENUE GREENWICH, CT06830 X Ott David C. 55 RAILROAD AVENUE GREENWICH, CT06830 X Shabet Rose Sharon 55 RAILROAD AVENUE GREENWICH, CT06830 X Signatures /s/ Scott M. Hendler signing on behalf of O. Andreas Halvorsen (10)(11) 08/30/2023 Signature of Reporting Person Date /s/ Scott M. Hendler signing on behalf of David C. Ott (10)(11) 08/30/2023 Signature of Reporting Person Date /s/ Scott M. Hendler signing on behalf of Rose S. Shabet (10)(11) 08/30/2023 Signature of Reporting Person Date

Explanation of Responses:

( 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, 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, KAVRA 104 LLC ("KAVRA 104"), and DRAGSA 50 LLC ("DRAGSA 50"). VGI, Opportunities Parent, Opportunities GP, 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 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. ( 4 )These securities are held directly by Opportunities Fund. Because of the relationship between Opportunities GP, Opportunities Parent and Opportunities Fund, each of Opportunities GP and Opportunities Parent may be deemed to beneficially own the securities held directly by Opportunities Fund. ( 5 )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. ( 6 )These shares of Common Stock are held directly by DRAGSA 50. The membership interests of DRAGSA 50 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 DRAGSA 50, each of Opportunities GP and Opportunities Parent may be deemed to beneficially own the shares of Common Stock held directly by DRAGSA 50. ( 7 )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. ( 8 )These warrants are immediately exercisable, subject to a beneficial ownership limitation (the "Beneficial Ownership Limitation") which prevents the holder from exercising the warrants to the extent that, after giving effect to the issuance of the shares of Common Stock upon exercise of warrants held by the holder, the holder would beneficially own in excess of 9.99% of the shares of Common Stock outstanding. Upon notice to the Issuer, the holder may increase or decrease the Beneficial Ownership Limitation, provided that the Beneficial Ownership Limitation in no event exceeds 19.99% of the shares of Common Stock outstanding after giving effect to the issuance of the shares of Common Stock upon exercise of warrants held by the holder. Any increase in the Beneficial Ownership Limitation will not be effective until the 61st day after such notice is delivered to the Issuer. ( 9 )These warrants have no expiration date.

Remarks: (10) The Reporting Persons are jointly filing this Form 4 pursuant to Rule 16a-3(j) under the Exchange Act. (11) 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, pursuant to authorization and designation letters dated February 9, 2021, which were filed with the Securities and Exchange Commission on June 7, 2021.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

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