Alnylam Pharmaceuticals, Inc. (ALNY) Insider Trading
Over the last 3 months, ALNY insiders made 0 open-market buys and 19 sales, a net sale of -$2.4M (SEC Form 4). Over the last 6 months, 653 institutions increased and 561 reduced their position (13F).
Insider Activity
Sentiment
0/100
Buys (3m)
0
Sells (3m)
19
Net (3m)
-$2.4M
Insider trades by month Buys Sells
Jan
Feb
Mar
Apr
Jun
Context3-month price -5.3%Institutions mixed (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Jun 3, 2026 | PYOTT DAVID E Idirector | Sell | 1,222 | $299.87 |
| Jun 3, 2026 | PYOTT DAVID E Idirector | Option | 3,830 | — |
| Jun 3, 2026 | PYOTT DAVID E Idirector | Sell | 495 | $300.72 |
| Jun 3, 2026 | PYOTT DAVID E Idirector | Sell | 921 | $297.71 |
| Jun 3, 2026 | PYOTT DAVID E Idirector | Sell | 17 | $302.65 |
| Jun 3, 2026 | Cravatt Benjamindirector | Grant | 4,393 | $295.63 |
| Jun 3, 2026 | PYOTT DAVID E Idirector | Sell | 1,175 | $298.91 |
| May 22, 2026 | HAMBURG MARGARET Adirector | Grant | 1,441 | $298.48 |
| May 22, 2026 | BRANDICOURT OLIVIERdirector | Grant | 671 | — |
| May 22, 2026 | Ausiello Dennis Adirector | Grant | 1,441 | $298.48 |
| May 22, 2026 | Ausiello Dennis Adirector | Grant | 671 | — |
| May 22, 2026 | Arbuckle Stuart Adirector | Grant | 671 | — |
| May 22, 2026 | SCHULMAN AMY Wdirector | Grant | 1,802 | $298.48 |
| May 22, 2026 | Sigal Charles Elliottdirector | Grant | 671 | — |
| May 22, 2026 | KELLOGG PETER Ndirector | Grant | 671 | — |
| May 22, 2026 | BRANDICOURT OLIVIERdirector | Grant | 1,441 | $298.48 |
| May 22, 2026 | Reitan Colleen Fdirector | Grant | 671 | — |
| May 22, 2026 | PYOTT DAVID E Idirector | Grant | 671 | — |
| May 22, 2026 | Arbuckle Stuart Adirector | Grant | 1,441 | $298.48 |
| May 22, 2026 | PYOTT DAVID E Idirector | Grant | 1,441 | $298.48 |
| May 22, 2026 | Reitan Colleen Fdirector | Grant | 1,441 | $298.48 |
| May 22, 2026 | SCHULMAN AMY Wdirector | Grant | 838 | — |
| May 22, 2026 | KELLOGG PETER Ndirector | Grant | 1,441 | $298.48 |
| May 22, 2026 | HAMBURG MARGARET Adirector | Grant | 671 | — |
| May 22, 2026 | Sigal Charles Elliottdirector | Grant | 1,441 | $298.48 |
| May 14, 2026 | SCHULMAN AMY Wdirector | Option | 11,250 | $70.20 |
| Apr 7, 2026 | McLaughlin Melissaofficer: Chief Human Resources Officer | Sell | 209 | $318.47 |
| Apr 7, 2026 | McLaughlin Melissaofficer: Chief Human Resources Officer | Sell | 81 | $323.64 |
| Apr 7, 2026 | McLaughlin Melissaofficer: Chief Human Resources Officer | Sell | 56 | $320.14 |
| Apr 7, 2026 | McLaughlin Melissaofficer: Chief Human Resources Officer | Sell | 8 | $325.49 |
Source: ALNY SEC Form 4 filings, latest Jun 3, 2026. For informational purposes only — not investment advice.
Institutional activity (13F)
How institutions changed their ALNY positions over the last 6 months (SEC Form 13F).
Increased
653
New positions
255
Reduced
561
Sold out
272
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| CAPITAL WORLD INVESTORS | Reduced | 16.3M | Feb 11, 2026 |
| FMR LLC | Reduced | 15.9M | Feb 17, 2026 |
| FMR LLC | Reduced | 14.6M | May 15, 2026 |
| VANGUARD GROUP INC | Reduced | 13.6M | Jan 29, 2026 |
| CAPITAL WORLD INVESTORS | Reduced | 10.8M | May 13, 2026 |
| BLACKROCK, INC. | Increased | 10.4M | May 13, 2026 |
| BLACKROCK, INC. | Increased | 10.4M | Feb 12, 2026 |
| CAPITAL RESEARCH GLOBAL INVESTORS | Increased | 9.5M | May 13, 2026 |
| CAPITAL RESEARCH GLOBAL INVESTORS | Reduced | 6.8M | Feb 11, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | New Position | 6.5M | May 8, 2026 |
| JPMORGAN CHASE & CO | Increased | 6.3M | May 13, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 5.9M | May 15, 2026 |
| T. ROWE PRICE INVESTMENT MANAGEMENT, INC. | Increased | 5.2M | May 15, 2026 |
| JPMORGAN CHASE & CO | Increased | 4.7M | Feb 11, 2026 |
| STATE STREET CORP | Increased | 3.3M | May 15, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.