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 67.3%. Over the past 90 days, insiders made 6 sales worth $1.3M.

Shares Outstanding

167.763M

Shares Float

121.065M

Insider Shares Owned

3.859M

Insider % Owned

2.3%

Institutional Shares Held

112.831M

Institutional % Held

67.3%

Ownership Breakdown

Net Insider Activity by Month

Purchases (90d)

Sales (90d)

$1.3M total

Net Activity

Net Selling

Net Value (90d)

-$1.3M

Alkermes Insider Transactions (Last 6 Months)

Date	Insider	Title	Type	Shares	Price	Value
Oct 2, 2026	David Joseph Gaffin	EVP, CLO, ALKERMES, INC.	SELL	2.034K	$41.03	$83K
Sep 3, 2026	David Joseph Gaffin	EVP, CLO, ALKERMES, INC.	SELL	2.034K	$48.01	$98K
Sep 1, 2026	Craig C Hopkinson	EVP R&D, CHIEF MEDICAL OFFICER	SELL	4.000K	$35.79	$300K
Aug 17, 2026	Christian Todd Nichols	SVP, CHIEF COMMERCIAL OFFICER	SELL	7.576K	$49.23	$373K
Aug 3, 2026	Nancy Snyderman	DIRECTOR	SELL-OPTIONS	—	$48.53	$161K
Aug 3, 2026	Craig C Hopkinson	EVP R&D, CHIEF MEDICAL OFFICER	SELL	4.000K	$36.53	$315K
Aug 3, 2026	David Joseph Gaffin	EVP, CLO, ALKERMES, INC.	SELL	2.034K	$48.58	$99K
Jul 6, 2026	David Joseph Gaffin	EVP, CLO, ALKERMES, INC.	SELL	2.034K	$54.03	$110K
Jul 1, 2026	Craig C Hopkinson	EVP R&D, CHIEF MEDICAL OFFICER	SELL	4.000K	$35.43	$367K
Jun 12, 2026	Christopher I Wright	DIRECTOR	SELL	2.000K	$45.10	$90K
Jun 4, 2026	David Joseph Gaffin	EVP, CLO, ALKERMES, INC.	SELL	2.034K	$43.05	$88K
Jun 1, 2026	Craig C Hopkinson	EVP R&D, CHIEF MEDICAL OFFICER	SELL	4.000K	$30.51	$278K
May 29, 2026	Samuel Joseph Parisi	VP, FINANCE (INTERIM PAO)	SELL-OPTIONS	—	$30.92	$371K
May 4, 2026	David Joseph Gaffin	EVP, CLO, ALKERMES, INC.	SELL	2.034K	$33.20	$68K
May 1, 2026	Craig C Hopkinson	EVP R&D, CHIEF MEDICAL OFFICER	SELL	4.000K	$26.37	$204K

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