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Inhibrx (INBX): Viking Global group discloses 9.3% beneficial ownership stake

(Neutral)
(Neutral)
Form Type
SCHEDULE 13G/A

Rhea-AI Filing Summary

Inhibrx Biosciences, Inc. is reported to have a significant shareholder group led by Viking Global entities and individuals O. Andreas Halvorsen and Rose S. Shabet. These reporting persons collectively beneficially own 1,383,621 shares of Common Stock, including shares underlying warrants to purchase 259,692 shares at an exercise price of $0.0001 per share. Based on 14,671,186 shares outstanding as of May 8, 2026 plus the warrant shares, their beneficial ownership represents up to 9.3% of the class. Voting and dispositive powers are held on a shared basis through a complex structure of Delaware and Cayman Islands investment entities managed by Viking Global Investors LP and related general partners.

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Beneficial ownership 1,383,621 shares of Common Stock Shares beneficially owned by Viking Global Investors LP and related reporting persons
Ownership percentage 9.3% Beneficial ownership percentage for VGI, Opportunities Parent, Halvorsen and Shabet
Shares outstanding 14,671,186 shares Common Stock outstanding as of May 8, 2026 used for percentage calculations
Warrant shares 259,692 shares Shares of Common Stock VGOP may purchase upon exercise of warrants
Warrant exercise price $0.0001 per share Exercise price of the warrants held by VGOP
VGOP beneficial ownership 1,250,816 shares Shares of Common Stock VGOP directly owns or may acquire via warrants
beneficially own regulatory
"Based on Rule 13d-3, as amended, VGI may be deemed to beneficially own the shares"
Beneficially own means having the economic rights and risks of a security—such as the right to receive dividends, sell the shares, or profit from price changes—whether or not your name appears on the official share register. Think of it like renting a car: you use it and reap the benefits even if the title lists someone else. Investors care because beneficial ownership determines who truly controls value, must be disclosed under securities rules, and can signal potential influence or trading activity that affects a stock’s price.
shared voting power regulatory
"Shared Voting Power 1,383,621.00"
Shared voting power occurs when two or more parties jointly have the right to vote or decide how a block of company shares is cast, like co-owners who must agree before moving a piece of furniture. Investors care because who controls voting rights affects board elections, major corporate decisions and takeover outcomes, and shared control can alter regulatory disclosures and the practical influence any holder has over a company’s direction and value.
shared dispositive power regulatory
"Shared Dispositive Power 1,383,621.00"
warrants to purchase shares of Common Stock financial
"and warrants to purchase shares of Common Stock with an exercise price of $0.0001 per share"
exempted limited partnership financial
"VGOP and VGOD are Cayman Islands exempted limited partnerships"
Schedule 13G regulatory
"previously filed with the Commission as an exhibit to a Form 13G filed by Mr. Halvorsen"
A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.

FAQ

What stake in Inhibrx Biosciences (INBX) do the Viking Global entities report?

The Viking Global reporting group discloses beneficial ownership of 1,383,621 shares of Inhibrx Biosciences Common Stock, representing up to 9.3% of the outstanding class when including exercisable warrants for 259,692 shares at $0.0001 per share.

How many Inhibrx (INBX) shares are outstanding for the ownership calculation?

The ownership percentages are calculated using 14,671,186 shares of Common Stock outstanding as of May 8, 2026, as reported by Inhibrx Biosciences in a quarterly report, plus 259,692 shares the reporting persons may acquire through warrants.

What percentage of Inhibrx (INBX) does Viking Global Investors LP beneficially own?

Viking Global Investors LP is deemed to beneficially own 1,383,621 shares of Inhibrx Biosciences Common Stock, equal to approximately 9.3% of the class, including shares held via affiliated entities and those issuable upon exercise of warrants.

Do O. Andreas Halvorsen and Rose S. Shabet directly own Inhibrx (INBX) shares?

O. Andreas Halvorsen and Rose S. Shabet do not directly own Inhibrx shares or warrants. They may be deemed to beneficially own 1,383,621 shares through their roles overseeing Viking Global Investors LP and Viking Global Opportunities Parent GP LLC.

Which Viking entities each hold more than 5% of Inhibrx (INBX)?

Entities with beneficial ownership above 5% include Viking Global Investors LP, Viking Global Opportunities Parent GP LLC, and the individuals O. Andreas Halvorsen and Rose S. Shabet, each at approximately 9.3%, plus several affiliated entities between about 8.4% and 8.7%.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Learn about SEC filing dates





45720N103

(CUSIP Number)
06/30/2026

(Date of Event Which Requires Filing of this Statement)


Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
Rule 13d-1(b)
Rule 13d-1(c)
Rule 13d-1(d)




schemaVersion:


SCHEDULE 13G




Comment for Type of Reporting Person: See Item 4


SCHEDULE 13G




Comment for Type of Reporting Person: See Item 4


SCHEDULE 13G




Comment for Type of Reporting Person: See Item 4


SCHEDULE 13G




Comment for Type of Reporting Person: See Item 4


SCHEDULE 13G




Comment for Type of Reporting Person: See Item 4


SCHEDULE 13G




Comment for Type of Reporting Person: See Item 4


SCHEDULE 13G




Comment for Type of Reporting Person: See Item 4


SCHEDULE 13G




Comment for Type of Reporting Person: See Item 4


SCHEDULE 13G




Comment for Type of Reporting Person: See Item 4


SCHEDULE 13G




Comment for Type of Reporting Person: See Item 4


SCHEDULE 13G




Comment for Type of Reporting Person: See Item 4


SCHEDULE 13G



VIKING GLOBAL INVESTORS LP
Signature:/s/ Scott M. Hendler
Name/Title:Scott M. Hendler on behalf of VIKING GLOBAL INVESTORS LP (1)(2)
Date:08/14/2026
Viking Global Opportunities Parent GP LLC
Signature:/s/ Scott M. Hendler
Name/Title:Scott M. Hendler on behalf of Viking Global Opportunities Parent GP LLC (1)(2)
Date:08/14/2026
Viking Global Opportunities GP LLC
Signature:/s/ Scott M. Hendler
Name/Title:Scott M. Hendler on behalf of Viking Global Opportunities GP LLC (1)(2)
Date:08/14/2026
Viking Global Opportunities Portfolio GP LLC
Signature:/s/ Scott M. Hendler
Name/Title:Scott M. Hendler on behalf of Viking Global Opportunities Portfolio GP LLC (1)(2)
Date:08/14/2026
Viking Global Opportunities Illiquid Investments Sub-Master LP
Signature:/s/ Scott M. Hendler
Name/Title:Scott M. Hendler on behalf of Viking Global Opportunities Illiquid Investments Sub-Master LP (1)(2)
Date:08/14/2026
KAVRA 104 LLC
Signature:/s/ Scott M. Hendler
Name/Title:Scott M. Hendler on behalf of KAVRA 104 LLC (1)(2)
Date:08/14/2026
Viking Global Opportunities Drawdown GP LLC
Signature:/s/ Scott M. Hendler
Name/Title:Scott M. Hendler on behalf of Viking Global Opportunities Drawdown GP LLC (1)(2)
Date:08/14/2026
Viking Global Opportunities Drawdown Portfolio GP LLC
Signature:/s/ Scott M. Hendler
Name/Title:Scott M. Hendler on behalf of Viking Global Opportunities Drawdown Portfolio GP LLC (1)(2)
Date:08/14/2026
Viking Global Opportunities Drawdown (Aggregator) LP
Signature:/s/ Scott M. Hendler
Name/Title:Scott M. Hendler on behalf of Viking Global Opportunities Drawdown (Aggregator) LP (1)(2)
Date:08/14/2026
HALVORSEN OLE ANDREAS
Signature:/s/ Scott M. Hendler
Name/Title:Scott M. Hendler on behalf of O. Andreas Halvorsen (1)
Date:08/14/2026
Shabet Rose Sharon
Signature:/s/ Scott M. Hendler
Name/Title:Scott M. Hendler on behalf of Rose S. Shabet (2)
Date:08/14/2026

Comments accompanying signature: (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).
Exhibit Information

EXHIBIT A - JOINT FILING AGREEMENT