MBX Biosciences Ownership & Insider Activity

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

Insiders own 2.1% of shares outstanding. Institutional investors hold 43.8%.

Shares Outstanding

48.160M

Shares Float

34.484M

Insider Shares Owned

994.415K

Insider % Owned

2.1%

Institutional Shares Held

21.094M

Institutional % Held

43.8%

Ownership Breakdown

Net Insider Activity by Month

MBX Biosciences Insider Transactions (Last 6 Months)

Date	Insider	Title	Type	Shares	Price	Value
Aug 4, 2026	Salomon Azoulay	CHIEF MEDICAL OFFICER	SELL	370.000	$65.77	$24K
May 8, 2026	Salomon Azoulay	CHIEF MEDICAL OFFICER	SELL-OPTIONS	—	$25.01	$1.9M
May 6, 2026	Salomon Azoulay	CHIEF MEDICAL OFFICER	SELL	231.000	$29.54	$7K
May 6, 2026	P. Kent Hawryluk	PRESIDENT & CEO	SELL	607.000	$29.54	$18K