Inhibrx Biosciences Ownership & Insider Activity

Inhibrx Biosciences (INBX) institutional and insider ownership, recent insider transactions and ownership breakdown.

Insiders own 0.1% of shares outstanding. Institutional investors hold 24.9%. Over the past 90 days, insiders made 6 purchases worth $5.5M and 2 sales worth $279K.

Shares Outstanding

14.718M

Shares Float

11.024M

Insider Shares Owned

20.443K

Insider % Owned

0.1%

Institutional Shares Held

3.658M

Institutional % Held

24.9%

Ownership Breakdown

Net Insider Activity by Month

Purchases (90d)

$5.5M total

Sales (90d)

$279K total

Net Activity

Net Buying

Net Value (90d)

$5.2M

Inhibrx Biosciences Insider Transactions (Last 6 Months)

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Date	Insider	Title	Type	Shares	Price	Value
Sep 25, 2026	Mark Lappe	CHIEF EXECUTIVE OFFICER	BUY	10.000K	$99.88	$999K
Sep 23, 2026	Jon Faiz Kayyem	DIRECTOR	BUY	5.000K	$100.00	$500K
Sep 16, 2026	Jon Faiz Kayyem	DIRECTOR	BUY	5.000K	$100.00	$500K
Sep 11, 2026	Kimberly Manhard	DIRECTOR	SELL	1.500K	$109.03	$164K
Sep 8, 2026	Kimberly Manhard	DIRECTOR	SELL	1.000K	$115.47	$115K
Sep 8, 2026	Jon Faiz Kayyem	DIRECTOR	BUY	5.000K	$113.52	$568K
Sep 8, 2026	Douglas Forsyth	DIRECTOR	BUY	2.500K	$114.65	$287K
Sep 8, 2026	Mark Lappe	CHIEF EXECUTIVE OFFICER	BUY	25.000K	$105.82	$2.6M

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Inhibrx Biosciences Ownership & Insider Activity

Inhibrx Biosciences Insider Transactions (Last 6 Months)

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