Alkermes plc ALKS NASDAQ

NASDAQ Global Select • Healthcare • Biotechnology • IE • USD

SharesGrow Score

79/100

6/7 Pass

SharesGrow Intrinsic Value

Alkermes plc (ALKS) has 20 known insider and institutional holders on record. The largest holder is Gaffin David Joseph with 233,592 shares. Other notable holders include Cooke Shane and POPS RICHARD F.

Over the last 12 months, insiders have made 56 transactions in ALKS stock — 13 buys (valued at RSU Award) and 6 sells (valued at $1.54M). Insider buying has outpaced selling during this period, which may signal confidence in the company's prospects.

ALKS Insider Ownership

Top Holder

Gaffin David Joseph

233,592 shares

Buys (12 mo)

$0.00 value

Sells (12 mo)

$1.54M value

12-Month Transaction Activity

Buy 23%

Sell 11%

Top Insider Holders

#	Name	Role	Shares Owned	Last Filed	Relative Size
1	Gaffin David Joseph	EVP, CLO, Alkermes, Inc.	233,592	2026-04-06	100%
2	Cooke Shane	Director	135,857	2026-02-02	58%
3	Pops Richard F	Director and CEO, Alkermes Plc	88,843	2026-03-04	38%
4	Jackson Blair Curtis	EVP, Chief Operating Officer	44,078	2026-03-04	19%
5	Reed Joshua	SVP, Chief Financial Officer	30,854	2026-03-04	13%
6	Nichols Christian Todd	SVP, Chief Commercial Officer	30,854	2026-03-04	13%
7	Brown Iain Michael	SVP, Chief Financial Officer	16,854	2025-02-28	7%
8	Hopkinson Craig C.	EVP R&d, Chief Medical Officer	16,356	2026-04-01	7%
9	Landine Michael J	SVP, Corp Dev., Alkermes, Inc.	12,233	2024-02-27	5%
10	Daglio David Angelo Jr.	Director	8,013	2024-06-04	3%
11	Parisi Samuel Joseph	VP, Finance (interim Pao)	7,717	2026-03-04	3%
12	Mckeon Brian P	Director	6,142	2025-05-23	3%
13	Snyderman Nancy Lynn Md	Director	6,142	2025-05-23	3%
14	Gaynor Richard	Director	6,142	2025-05-23	3%
15	Lurker Nancy	Director	6,142	2025-05-23	3%
16	Wright Christopher I	Director	6,142	2025-05-23	3%
17	Laurencin Cato T	Director	6,142	2025-05-23	3%
18	Wilson Frank Anders	Director	6,142	2025-05-23	3%
19	Wysenski Nancy	Director	5,985	2023-06-30	3%
20	Alva Emily Peterson	Director	1,137	2024-06-04	0%

Recent Transactions (last 12 months)

Date	Name	Role	Type	Shares	Price	Value
2026-04-06	Gaffin David Joseph	EVP, CLO, Alkermes, Inc.	Informative Sell	2,034	$34.57	$70.32K
2026-04-01	Hopkinson Craig C.	EVP R&d, Chief Medical Officer	Option Exercise (Sell)	5,000	$19.34	$96.7K
2026-03-02	Parisi Samuel Joseph	VP, Finance (interim Pao)	Informative Sell	6,890	$29.29	$201.81K
2026-03-02	Jackson Blair Curtis	EVP, Chief Operating Officer	RSU Award	44,078	-	-
2026-03-02	Nichols Christian Todd	SVP, Chief Commercial Officer	RSU Award	30,854	-	-
2026-03-02	Reed Joshua	SVP, Chief Financial Officer	RSU Award	30,854	-	-
2026-03-02	Hopkinson Craig C.	EVP R&d, Chief Medical Officer	Option Exercise (Sell)	5,000	$19.34	$96.7K
2026-03-03	Gaffin David Joseph	EVP, CLO, Alkermes, Inc.	Informative Sell	2,034	$29.76	$60.53K
2026-03-02	Gaffin David Joseph	EVP, CLO, Alkermes, Inc.	RSU Award	36,364	-	-
2026-03-02	Pops Richard F	Director and CEO, Alkermes Plc	RSU Award	88,843	-	-
2026-02-26	Parisi Samuel Joseph	VP, Finance (interim Pao)	Option Exercise (Sell)	2,747	-	-
2026-02-26	Jackson Blair Curtis	EVP, Chief Operating Officer	Option Exercise (Sell)	8,322	-	-
2026-02-26	Nichols Christian Todd	SVP, Chief Commercial Officer	Option Exercise (Sell)	5,410	-	-
2026-02-26	Hopkinson Craig C.	EVP R&d, Chief Medical Officer	Option Exercise (Sell)	6,866	-	-
2026-02-26	Gaffin David Joseph	EVP, CLO, Alkermes, Inc.	Option Exercise (Sell)	6,866	-	-
2026-02-23	Parisi Samuel Joseph	VP, Finance (interim Pao)	Option Exercise (Sell)	2,283	-	-
2026-02-23	Jackson Blair Curtis	EVP, Chief Operating Officer	Option Exercise (Sell)	8,738	-	-
2026-02-23	Nichols Christian Todd	SVP, Chief Commercial Officer	Option Exercise (Sell)	6,407	-	-
2026-02-23	Hopkinson Craig C.	EVP R&d, Chief Medical Officer	Option Exercise (Sell)	7,689	-	-
2026-02-23	Gaffin David Joseph	EVP, CLO, Alkermes, Inc.	Option Exercise (Sell)	7,689	-	-
2026-02-19	Parisi Samuel Joseph	VP, Finance (interim Pao)	Option Exercise (Sell)	2,991	-	-
2026-02-18	Parisi Samuel Joseph	VP, Finance (interim Pao)	Option Exercise (Sell)	2,034	-	-
2026-02-19	Jackson Blair Curtis	EVP, Chief Operating Officer	Option Exercise (Sell)	9,300	-	-
2026-02-18	Jackson Blair Curtis	EVP, Chief Operating Officer	Option Exercise (Sell)	8,897	-	-
2026-02-19	Nichols Christian Todd	SVP, Chief Commercial Officer	Option Exercise (Sell)	6,045	-	-