SC Filed 2018-01-04 Event — SEC 0001104659-18-000737 →

→ Alkermes plc. ALKS

Stake: — Shares: —

Item 4 — Purpose of Transaction

Not extracted from this filing — typically because it's an amendment (13D/A) and Item 4 is unchanged from the parent filing. Read the raw SEC filing →

Cross-References

Insider Activity (last 365d)

7 transactions

4 buys · 2 sales · 1 awards/exercises

Issuer Cluster

8 13D/G filings on this issuer

7 other filings besides this one

Filer Track Record

5 filings by this filer

4 other filings in the data moat

Short Interest · settle 2026-08-31

DTC 11.79

14,717,404 shares short · -0.3% vs prior

Form 4 Insider Transactions · last 365d

Date	Insider	Role	Type	Shares	Price	Value
2026-09-01	Hopkinson Craig C.	officer	Option exercise	5,000	$24.59	$123K
2026-09-01	Hopkinson Craig C.	officer	Sale	9,000	$46.99	$423K
2026-08-05	Jackson Blair Curtis	director, officer	Award	93,229	$49.61	$4.63M
2026-08-05	Jackson Blair Curtis	director, officer	Award	124,305	$49.61	$6.17M
2026-05-20	GAYNOR RICHARD	director	Award	11,538	$36.98	$427K
2026-05-20	Cooke Shane	director	Award	11,538	$36.98	$427K
2026-04-06	Gaffin David Joseph	officer	Sale	2,034	$34.57	$70K

Other 13D/G Filings on Alkermes plc.

Filed	Form	Filer	Stake	Shares
2023-06-21	SC	Sarissa Capital Management LP	—	—	view →
2023-06-12	SC	Sarissa Capital Management LP	—	—	view →
2022-07-06	SC	Sarissa Capital Management LP	—	—	view →
2022-01-10	SC	Sarissa Capital Management LP	—	—	view →
2021-11-19	SC	Sarissa Capital Management LP	—	—	view →
2021-09-10	SC	Sarissa Capital Management LP	—	—	view →
2021-05-27	SC	Sarissa Capital Management LP	—	—	view →

Other Filings by PRIMECAP MANAGEMENT CO/CA/

Filed	Form	Issuer	Stake	Shares
2026-08-06	SCHEDULE 13G	Amentum Holdings, Inc.	—	—	view →
2018-01-05	SC	Flex Pharma, Inc. DCOY	—	—	view →
2018-01-04	SC	Flex Pharma, Inc. DCOY	—	—	view →
2018-01-04	SC	AXCELIS TECHNOLOGIES INC ACLS	—	—	view →

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