Inhibrx Biosciences, Inc.

INBX • NASDAQ

Inhibrx Biosciences, Inc. is a biotechnology company in the healthcare sector on NASDAQ, led by Brendan P. Eckelman, Ph.D., with a market cap of $1.2B. As of Q3 2025, 72% of shares are held by 101 institutional investors, with VIKING GLOBAL INVESTORS LP as the largest holder at 12.34%.

CEOBrendan P. Eckelman, Ph.D.

Market Cap$1.2B

Biotechnology

Healthcare

Employees172.0

Websiteinhibrx.com

Country

United States of America

Overview

Overview of institutional ownership in INBX as of Q3 2025 with a market cap of $487.9M

All Institutions

Institutions: 101
Value Held: $353.5M
Shares Held: 10.5M
Avg Position: $3.5M
Median Position: $453.6K

Hedge Funds

Hedge Funds: 19
Value Held: $160.8M
Shares Held: 4.8M
Avg Position: $8.5M
Median Position: $1.8M

Ownership Breakdown

Institutional (non-HF)

39.51%

$192.7M

Hedge Funds

32.96%

$160.8M

Retail & Other

27.53%

$134.3M

Based on market cap of $487.9M as of Q3 2025. Institutional (non-HF) excludes hedge funds to avoid double counting.

Biggest Investors

Institutions with the largest positions in INBX as of Q3 2025

Institution	Key People	Position Value	Ownership	Owned Since	Total AUM (Long)
VIKING GLOBAL INVESTORS LP Hedge Fund•Long/Short	Ole Andreas Halvorsen CEO	$60.2M 0.16% of portfolio	12.34% 1.8M shares	Q4 2022 Held for 2y 11m	$38.5B
PERCEPTIVE ADVISORS LLC Hedge Fund•Long/Short	Joseph Eric Edelman CEO	$44.7M 1.30% of portfolio	9.17% 1.3M shares	Q4 2022 Held for 2y 11m	$3.5B
S Sanofi Institution	-	$39.0M 14.98% of portfolio	7.99% 1.2M shares	Q4 2024 Held for 11 months	$260.4M
HighTower Advisors, LLC RIA/Wealth	Robert David Oros CEO	$29.4M 0.03% of portfolio	6.02% 871.8K shares	Q2 2024 Held for 1y 5m	$87.7B
B BlackRock, Inc. Institution	-	$23.1M 0.00% of portfolio	4.73% 684.7K shares	Q4 2022 Held for 2y 11m	$5.67T
VANGUARD GROUP INC Institution	Salim Ramji CEO	$20.0M 0.00% of portfolio	4.11% 594.9K shares	Q4 2022 Held for 2y 11m	$6.69T
MORGAN STANLEY RIA/Wealth	Jed Finn CEO	$14.9M 0.00% of portfolio	3.06% 442.9K shares	Q4 2022 Held for 2y 11m	$1.65T
S Sofinnova Ventures Inc Venture Capital	James Irvin Healy Managing Partner	$14.8M 0.91% of portfolio	3.04% 440.1K shares	Q4 2022 Held for 2y 11m	$1.6B
Woodline Partners LP Hedge Fund•Long/Short	Karl Heinz Kroeker CIO	$11.3M 0.05% of portfolio	2.32% 336.6K shares	Q1 2025 Held for 8 months	$21.3B
MILLENNIUM MANAGEMENT LLC Hedge Fund•Multi-Strategy	Dan Michael Berkovitz Chairman	$10.0M 0.01% of portfolio	2.06% 297.8K shares	Q4 2023 Held for 1y 11m	$121.98B

Net Capital Flow

Institutional buying and selling activity for INBX in Q3 2025

Traded: +$13.5M
Buyers: 48
Sellers: 46
Total Bought: +$53.6M
Total Sold: −$40.1M
Avg Position: $3.2M

Biggest Buyers

Institution	Net Bought	Current Position
MORGAN STANLEY RIA/Wealth	+$14.0M +415.0K shares	$14.9M 442.9K shares
PERCEPTIVE ADVISORS LLC Hedge Fund•Long/Short	+$11.8M +349.8K shares	$44.7M 1.3M shares
C Caligan Partners LP Hedge Fund•Activist	+$8.0M +236.4K shares	$8.0M 236.4K shares
R READYSTATE ASSET MANAGEMENT LP Hedge Fund•Multi-Strategy	+$4.8M +143.3K shares	$5.7M 170.2K shares
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	+$1.9M +57.2K shares	$1.9M 57.2K shares
SummitTX Capital, L.P. Hedge Fund•Multi-Strategy	+$1.8M +54.1K shares	$1.8M 54.1K shares
BOOTHBAY FUND MANAGEMENT, LLC Fund of Funds	+$1.7M +50.6K shares	$2.7M 78.8K shares
J JANE STREET GROUP, LLC Institution	+$1.5M +43.6K shares	$2.1M 62.9K shares
WELLINGTON MANAGEMENT CO LLP Long Only Manager	+$1.0M +29.8K shares	$1.0M 29.8K shares
Marshall Wace LLP Institution	+$917.5K +27.2K shares	$917.5K 27.2K shares

Biggest Sellers

Institution	Net Sold	Current Position
Woodline Partners LP Hedge Fund•Long/Short	−$11.0M −326.3K shares	$11.3M 336.6K shares
S Sofinnova Ventures Inc Venture Capital	−$9.0M −268.6K shares	$14.8M 440.1K shares
Slotnik Capital, LLC Hedge Fund•Event Driven	−$4.8M −142.8K shares	$1.4M 41.4K shares
ACADIAN ASSET MANAGEMENT LLC Long Only Manager	−$3.1M −91.7K shares	$958.0K 28.4K shares
Schonfeld Strategic Advisors LLC Hedge Fund•Multi-Strategy	−$1.9M −57.4K shares	$3.3M 97.4K shares
B BlackRock, Inc. Institution	−$1.5M −44.0K shares	$23.1M 684.7K shares
UBS Group AG Institution	−$1.2M −36.6K shares	$317.5K 9.4K shares
C CREDIT INDUSTRIEL ET COMMERCIAL Institution	−$1.2M −35.3K shares	$975.3K 29.0K shares
Groupe la Francaise Fund of Funds	−$963.2K −28.6K shares	$1.6M 47.3K shares
Ikarian Capital, LLC Hedge Fund•Event Driven	−$601.1K −42.1K shares	Sold Off 0 shares

Entry and Exit Activity

Institutions that initiated new positions or completely exited INBX in Q3 2025

New Positions: 12
New Value: $11.3M
Exited Positions: 11
Exited Value: $3.5M

New Positions

Institution	Position Value
C Caligan Partners LP Hedge Fund•Activist	$8.0M 236.4K shares
SummitTX Capital, L.P. Hedge Fund•Multi-Strategy	$1.8M 54.1K shares
L Longwood Capital Partners LLC Institution	$551.6K 16.4K shares
Quantinno Capital Management LP Hedge Fund•Market Neutral	$398.3K 11.8K shares
HighVista Strategies LLC Fund of Funds	$256.8K 7.6K shares
ARROWSTREET CAPITAL LIMITED PARTNERSHIP Hedge Fund•Quant	$202.2K 6.0K shares
NBC SECURITIES, INC. RIA/Wealth	$101.0K 3.0K shares
P PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO Institution	$40.4K 1.2K shares
Sontag Advisory, LLC RIA/Wealth	$8.4K 250.0 shares
O Optiver Holding B.V. Institution	$3.8K 114.0 shares

Exited Positions

Institution	Previous Position
Ikarian Capital, LLC Hedge Fund•Event Driven	$601.1K 42.1K shares
M Murchinson Ltd. Institution	$482.2K 33.8K shares
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity	$329.3K 23.1K shares
Y Yakira Capital Management, Inc. Hedge Fund•Event Driven	$301.4K 21.1K shares
J JBF Capital, Inc. Institution	$298.9K 20.9K shares
C CI Private Wealth, LLC RIA/Wealth	$291.9K 20.5K shares
Q Qube Research & Technologies Ltd Institution	$283.8K 19.9K shares
H HRT FINANCIAL LLC Institution	$282.3K 19.8K shares
F Fort Hoosac Management, LLC Hedge Fund•Multi-Strategy	$282.0K 19.8K shares
M MARK ASSET MANAGEMENT CORP Hedge Fund•Long/Short	$242.6K 17.0K shares

Options Activity

Institutions with the largest Call and Put options positions in INBX as of Q3 2025

Call Positions: 2
Call Value: $781.4K
Put Positions: 2
Put Value: $2.0M

Call Positions

Institution	Position Value
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity	$693.8K 206.0 contracts
B Belvedere Trading LLC Institution	$87.6K 26.0 contracts

Put Positions

Institution	Position Value
Caption Management, LLC Hedge Fund•Long/Short	$1.9M 575.0 contracts
B Belvedere Trading LLC Institution	$50.5K 15.0 contracts

Most Committed Institutions

Institutions with INBX as the highest % of their portfolio as of Q3 2025

Institution	Key People	Portfolio Weight	Ownership	Owned Since	Total AUM (Long)
S Sanofi Institution	-	14.98% $39.0M	7.99% 1.2M shares	Q4 2024 Held for 11 months	$260.4M
PERCEPTIVE ADVISORS LLC Hedge Fund•Long/Short	Joseph Eric Edelman CEO	1.30% $44.7M	9.17% 1.3M shares	Q4 2022 Held for 2y 11m	$3.5B
C Caligan Partners LP Hedge Fund•Activist	Tiffany Crowley CFO	1.10% $8.0M	1.63% 236.4K shares	Q3 2025 Held for 2 months	$720.7M
S Sofinnova Ventures Inc Venture Capital	James Irvin Healy Managing Partner	0.91% $14.8M	3.04% 440.1K shares	Q4 2022 Held for 2y 11m	$1.6B
B Birchview Capital, LP Hedge Fund•Value	Matthew William Strobeck CIO	0.82% $1.1M	0.22% 31.7K shares	Q2 2023 Held for 2y 5m	$130.3M
Partner Fund Management, L.P. Hedge Fund•Sector	Jonathan Jude Aljoe CFO	0.70% $8.1M	1.65% 239.6K shares	Q1 2023 Held for 2y 8m	$1.2B
R READYSTATE ASSET MANAGEMENT LP Hedge Fund•Multi-Strategy	David Barnett Grossman Managing Partner	0.57% $5.7M	1.17% 170.2K shares	Q2 2025 Held for 5 months	$1.0B
L Longwood Capital Partners LLC Institution	-	0.57% $551.6K	0.11% 16.4K shares	Q3 2025 Held for 2 months	$96.8M
Slotnik Capital, LLC Hedge Fund•Event Driven	Loren Russell Sauer CCO	0.50% $1.4M	0.29% 41.4K shares	Q1 2024 Held for 1y 8m	$277.4M
C CREDIT INDUSTRIEL ET COMMERCIAL Institution	-	0.22% $975.3K	0.20% 29.0K shares	Q4 2024 Held for 11 months	$440.6M

Hedge Fund Spotlight

Discover hedge funds investing in INBX

Woodline Partners LP

Hedge Fund • Long/Short

Portfolio ManagerKarl Heinz Kroeker

Portfolio Value: $21.3B
Positions: 868
Last Reported: Q3 2025

Sector Allocation

Position in Inhibrx Biosciences, Inc.

Market Value: $11.3M
Shares Held: 336.6K
Portfolio Weight: 0.05%
Owned Since: 2025-Q1

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