InsiderSource
ALKS

Alkermes plc.

SEC CIK 1520262
$44.28 +29.7% · 90 days
90-day buys
$0
0 open-market
90-day sells
$1.91M
7 open-market
Net insider flow
−$1.91M
Net selling
Filings shown
40
Most recent
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At a glance

Over the last 90 days, insiders at ALKS have sold a net $1.91M of stock (0 open-market buys vs 7 sells).

Largest recent trade: Parisi Samuel Joseph sold $687K of ALKS, trimming their stake 68%.

Most active filer: Hopkinson Craig C., with 8 transactions among the recent filings shown.

Insider transaction history

Form 4 filings for ALKS, newest first
View on SEC EDGAR ↗
ALKS
Alkermes plc.
Sell Gaffin David Joseph · EVP, CLO, Alkermes, Inc. · Open-market sale · filed 1w ago ΔOwn −0.9%

Gaffin David Joseph sold $87.6K of ALKS, trimming their stake 1%.

−$87.6K
2,034 sh @ $43
ALKS
Alkermes plc.
Option exercise Hopkinson Craig C. · EVP R&D, Chief Medical Officer · Option exercise · filed 1w ago ΔOwn +6.1%
+$96.7K
5,000 sh @ $19
ALKS
Alkermes plc.
Sell Hopkinson Craig C. · EVP R&D, Chief Medical Officer · Open-market sale · filed 1w ago ΔOwn −10%

Hopkinson Craig C. sold $375K of ALKS, trimming their stake 10%.

−$375K
9,000 sh @ $42
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ALKS
Alkermes plc.
Sell Parisi Samuel Joseph · VP, Finance (Interim PAO) · Open-market sale · filed 2w ago ΔOwn −68%

Parisi Samuel Joseph sold $687K of ALKS, trimming their stake 68%.

−$687K
16,217 sh @ $42
ALKS
Alkermes plc.
Tax withholding MCKEON BRIAN P · Director · Tax withholding · filed 3w ago ΔOwn −3.7%
−$54.5K
1,475 sh @ $37
ALKS
Alkermes plc.
Tax withholding Lurker Nancy · Director · Tax withholding · filed 3w ago ΔOwn −7.5%
−$54.5K
1,475 sh @ $37
ALKS
Alkermes plc.
Tax withholding GAYNOR RICHARD · Director · Tax withholding · filed 3w ago ΔOwn −4.0%
−$54.5K
1,475 sh @ $37
ALKS
Alkermes plc.
Option exercise Cooke Shane · Director · Option exercise · filed 3w ago ΔOwn +5.9%
+$0
6,142 sh
ALKS
Alkermes plc.
Tax withholding Cooke Shane · Director · Tax withholding · filed 3w ago ΔOwn −2.9%
−$118.5K
3,207 sh @ $37
ALKS
Alkermes plc.
Sell Gaffin David Joseph · EVP, CLO, Alkermes, Inc. · Open-market sale · filed May 4, 2026 ΔOwn −0.9%

Gaffin David Joseph sold $67.5K of ALKS, trimming their stake 1%.

−$67.5K
2,034 sh @ $33
ALKS
Alkermes plc.
Option exercise Hopkinson Craig C. · EVP R&D, Chief Medical Officer · Option exercise · filed May 1, 2026 ΔOwn +5.9%
+$96.7K
5,000 sh @ $19
ALKS
Alkermes plc.
Sell Hopkinson Craig C. · EVP R&D, Chief Medical Officer · Open-market sale · filed May 1, 2026 ΔOwn −10.0%

Hopkinson Craig C. sold $300.6K of ALKS, trimming their stake 10%.

−$300.6K
9,000 sh @ $33
ALKS
Alkermes plc.
Option exercise Lurker Nancy · Director · Option exercise · filed Apr 13, 2026 ΔOwn +35%
+$0
3,751 sh
ALKS
Alkermes plc.
Tax withholding Lurker Nancy · Director · Tax withholding · filed Apr 13, 2026 ΔOwn −6.2%
−$30.1K
901 sh @ $33
ALKS
Alkermes plc.
Sell Gaffin David Joseph · EVP, CLO, Alkermes, Inc. · Open-market sale · filed Apr 6, 2026 ΔOwn −0.9%

Gaffin David Joseph sold $70.3K of ALKS, trimming their stake 1%.

−$70.3K
2,034 sh @ $35
ALKS
Alkermes plc.
Option exercise Hopkinson Craig C. · EVP R&D, Chief Medical Officer · Option exercise · filed Apr 1, 2026 ΔOwn +5.6%
+$96.7K
5,000 sh @ $19
ALKS
Alkermes plc.
Sell Hopkinson Craig C. · EVP R&D, Chief Medical Officer · Open-market sale · filed Apr 1, 2026 ΔOwn −9.5%

Hopkinson Craig C. sold $319.6K of ALKS, trimming their stake 10%.

−$319.6K
9,000 sh @ $36
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About ALKS insider activity

This page tracks every recent Form 4 filed for Alkermes plc. with the U.S. Securities and Exchange Commission. Form 4 is the disclosure that company insiders — officers, directors, and holders of more than 10% of the stock — must file within two business days of buying or selling shares.

The summary above nets open-market purchases against open-market sales over the trailing 90 days. Open-market trades (codes P and S) tend to carry the most signal because they reflect a deliberate choice to put money in or take it out, as opposed to routine grants, option exercises, or tax-withholding events. Use the badges on each row to tell them apart, and always confirm details against the original filing before drawing conclusions.

Frequently asked questions

How often is ALKS insider data updated?

Continuously. We read from SEC EDGAR, so new Form 4 filings for Alkermes plc. usually appear here within minutes of being accepted by the SEC.

What does "net insider flow" mean?

It is the total dollar value of open-market insider purchases minus open-market sales over the last 90 days. A positive number (green) means insiders bought more than they sold; a negative number (red) means the reverse.

Why do some rows show grants or option exercises instead of buys?

Insiders receive stock through compensation as well as buying it outright. Form 4 captures all of these. We label each transaction by its SEC code so you can focus on open-market activity if you prefer.

Is this investment advice?

No. InsiderSource presents public filing data for informational purposes only. Insider activity is one of many factors to consider and is never a recommendation to buy or sell.