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)
DateInsiderTypeSharesPrice
Jun 3, 2026PYOTT DAVID E IdirectorSell1,222$299.87
Jun 3, 2026PYOTT DAVID E IdirectorOption3,830
Jun 3, 2026PYOTT DAVID E IdirectorSell495$300.72
Jun 3, 2026PYOTT DAVID E IdirectorSell921$297.71
Jun 3, 2026PYOTT DAVID E IdirectorSell17$302.65
Jun 3, 2026Cravatt BenjamindirectorGrant4,393$295.63
Jun 3, 2026PYOTT DAVID E IdirectorSell1,175$298.91
May 22, 2026HAMBURG MARGARET AdirectorGrant1,441$298.48
May 22, 2026BRANDICOURT OLIVIERdirectorGrant671
May 22, 2026Ausiello Dennis AdirectorGrant1,441$298.48
May 22, 2026Ausiello Dennis AdirectorGrant671
May 22, 2026Arbuckle Stuart AdirectorGrant671
May 22, 2026SCHULMAN AMY WdirectorGrant1,802$298.48
May 22, 2026Sigal Charles ElliottdirectorGrant671
May 22, 2026KELLOGG PETER NdirectorGrant671
May 22, 2026BRANDICOURT OLIVIERdirectorGrant1,441$298.48
May 22, 2026Reitan Colleen FdirectorGrant671
May 22, 2026PYOTT DAVID E IdirectorGrant671
May 22, 2026Arbuckle Stuart AdirectorGrant1,441$298.48
May 22, 2026PYOTT DAVID E IdirectorGrant1,441$298.48
May 22, 2026Reitan Colleen FdirectorGrant1,441$298.48
May 22, 2026SCHULMAN AMY WdirectorGrant838
May 22, 2026KELLOGG PETER NdirectorGrant1,441$298.48
May 22, 2026HAMBURG MARGARET AdirectorGrant671
May 22, 2026Sigal Charles ElliottdirectorGrant1,441$298.48
May 14, 2026SCHULMAN AMY WdirectorOption11,250$70.20
Apr 7, 2026McLaughlin Melissaofficer: Chief Human Resources OfficerSell209$318.47
Apr 7, 2026McLaughlin Melissaofficer: Chief Human Resources OfficerSell81$323.64
Apr 7, 2026McLaughlin Melissaofficer: Chief Human Resources OfficerSell56$320.14
Apr 7, 2026McLaughlin Melissaofficer: Chief Human Resources OfficerSell8$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
InstitutionActionSharesFiled
CAPITAL WORLD INVESTORSReduced16.3MFeb 11, 2026
FMR LLCReduced15.9MFeb 17, 2026
FMR LLCReduced14.6MMay 15, 2026
VANGUARD GROUP INCReduced13.6MJan 29, 2026
CAPITAL WORLD INVESTORSReduced10.8MMay 13, 2026
BLACKROCK, INC.Increased10.4MMay 13, 2026
BLACKROCK, INC.Increased10.4MFeb 12, 2026
CAPITAL RESEARCH GLOBAL INVESTORSIncreased9.5MMay 13, 2026
CAPITAL RESEARCH GLOBAL INVESTORSReduced6.8MFeb 11, 2026
VANGUARD PORTFOLIO MANAGEMENT LLCNew Position6.5MMay 8, 2026
JPMORGAN CHASE & COIncreased6.3MMay 13, 2026
VANGUARD CAPITAL MANAGEMENT LLCNew Position5.9MMay 15, 2026
T. ROWE PRICE INVESTMENT MANAGEMENT, INC.Increased5.2MMay 15, 2026
JPMORGAN CHASE & COIncreased4.7MFeb 11, 2026
STATE STREET CORPIncreased3.3MMay 15, 2026

Source: SEC Form 13F filings. For informational purposes only — not investment advice.