Inhibrx Biosciences

INBX · NASDAQ

$95.30+$5.51 (+6.14%)TodayMarket closed · Oct 20, 4:05 PM ET

Prev close $89.79

Who owns INBX

Largest institutional holders, from their latest 13F filings

Top institutional holders of INBX
Holder	Shares	% of shares	Change, last filing	Filed
Viking Global Investors LP	7.15M	48.74%	+0	Dec 31, 2023
RA Capital Management, LP	4.72M	32.20%	+0	Dec 31, 2023
Perceptive Advisors LLC	4.26M	29.01%	+0	Dec 31, 2023
Kayyem (Jon Faiz)	3.27M	22.32%	+0	Feb 21, 2024
Lappe Mark	3.05M	20.76%	+0	Feb 21, 2024
BlackRock Institutional Trust Company, N.A.	2.47M	16.85%	+179.08K	Dec 31, 2023
Eckelman (Brendan P)	2.36M	16.06%	+0	Feb 21, 2024
Woodline Partners LP	2.32M	15.80%	+793.66K	Dec 31, 2023
The Vanguard Group, Inc.	1.87M	12.75%	+84.51K	Dec 31, 2023
TCG Crossover Management, LLC	1.75M	11.93%	+0	Dec 31, 2023

Largest mutual fund holders

Top mutual fund holders of INBX
Holder	Shares	% of shares	Change, last filing	Filed
SPDR S&P Biotech ETF	1.68M	11.47%	+713.20K	Mar 31, 2024
Vanguard Total Stock Market Index Fund	1.12M	7.65%	+1.83K	Mar 31, 2024
iShares Russell 2000 ETF	836.68K	5.70%	+7.53K	Mar 31, 2024
Vanguard Extended Market Index Fund	394.17K	2.69%	+5.66K	Mar 31, 2024
Fidelity Small Cap Index Fund	346.98K	2.37%	+4.54K	Jan 31, 2024

Insider trades

Form 4 filings by officers, directors and large holders

Over the last 6 months, insiders bought $6.35M (20 trades) and sold $279.01K (5 trades) of INBX on the open market.

Latest INBX insider transactions
Insider	Date	Type	Shares	Price	Value
Lappe Mark	Oct 14, 2026	Buy	100	$85.76	$8.58K
Lappe Mark	Oct 14, 2026	Buy	2.45K	$85.00	$208.33K
Lappe Mark	Oct 14, 2026	Buy	2.45K	$84.07	$205.89K
Lappe Mark	Oct 14, 2026	Buy	100	$85.76	$8.58K
Lappe Mark	Oct 14, 2026	Buy	2.47K	$85.00	$209.95K
Lappe Mark	Oct 14, 2026	Buy	2.47K	$84.07	$207.65K
Lappe Mark	Sep 28, 2026	Buy	3.00K	$101.70	$305.11K
Lappe Mark	Sep 28, 2026	Buy	1.50K	$98.88	$148.32K
Lappe Mark	Sep 25, 2026	Buy	2.18K	$99.60	$216.73K
Lappe Mark	Sep 25, 2026	Buy	3.32K	$98.87	$328.63K

Short interest

Settled Sep 30, 2026

Shares short: 3.43M
Days to cover: 11.82
% of shares outstanding: 23.40%
Average daily volume: 290.36K
Change since last report: +1.2%

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