Alkermes Ownership & Insider Activity

Alkermes (ALKS) institutional and insider ownership, recent insider transactions and ownership breakdown.

Insiders own 2.3% of shares outstanding. Institutional investors hold 67.1%.

Shares Outstanding

167.763M

Shares Float

121.065M

Insider Shares Owned

3.859M

Insider % Owned

2.3%

Institutional Shares Held

112.641M

Institutional % Held

67.1%

Ownership Breakdown

Congressional Trading Activity

Date	Member	Party	Chamber	Action	Amount
Sep 29, 2026	Gilbert Ray Cisneros	D	House	Purchase	$1,001 - $15,000
Jul 30, 2026	Gilbert Ray Cisneros	D	House	Purchase	$15,001 - $50,000