Alnylam Pharmaceuticals Inc.

Last updated September 27, 2026
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Organization details

Legal name
Alnylam Pharmaceuticals Inc.
Ownership
Public
Status
Active
SIC code
2834 — Pharmaceutical Preparations
Headquarters city
Cambridge
Headquarters state / province
Massachusetts
Headquarters country
United States
Fiscal year end
December
Ticker symbol
ALNY
Primary stock exchange
Nasdaq

Identifiers

SEC CIK
0001178670
EIN
77-0602661

Board of directors

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Chief executives

Yvonne Greenstreet · Chief Executive Officer
Dates unknown

Director election results

Annual meeting of May 20, 2026. Support is votes for as a share of votes for and against (or withheld). Below 80% is a clear protest.

Board connections

12 of this board's directors also sit on 19 other boards.

Network of Alnylam Pharmaceuticals Inc.'s board connections Vir Biotechnology Inc. Vir Biotechnology Inc. Autolus Therapeutics plc American Depositary Share Autolus Therapeutics p... BeOne Medicines Ltd. BeOne Medicines Ltd. BioMarin Pharmaceutical Inc. BioMarin Pharmaceutica... Elevance Health Inc. Elevance Health Inc. Eli Lilly and Company Eli Lilly and Company Fractyl Health Inc. Fractyl Health Inc. Generate Biomedicines Inc. Generate Biomedicines... Immunic Inc. Immunic Inc. Kyntra Bio Inc. Kyntra Bio Inc. Myriad Genetics Inc. Myriad Genetics Inc. OmniAb Inc. OmniAb Inc. Pliant Therapeutics Inc. Pliant Therapeutics In... Praxis Precision Medicines Inc. Praxis Precision Medic... Rani Therapeutics Holdings Inc. Rani Therapeutics Hold... Rhythm Pharmaceuticals Inc. Rhythm Pharmaceuticals... Amy W. Schulman Amy W. Schulman Benjamin Cravatt Benjamin Cravatt Carolyn R. Bertozzi Carolyn R. Bertozzi Charles Elliott Sigal Charles Elliott Siga... Colleen F. Reitan Colleen F. Reitan David E. I. Pyott David E. I. Pyott Dennis A. Ausiello Dennis A. Ausiello Marsha Fanucci Marsha Fanucci Michael W. Bonney Michael W. Bonney Olivier Brandicourt Olivier Brandicourt Alnylam Pharmaceuticals In...
Shared director Other board Same sector +3 more in the list below

Insider trades

All notable trades →

From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.

Bought, last 12 months
$0
0 purchases by 0 insiders
Sold, last 12 months
$53,747,810
343 sales by 7 insiders
Date Insider Transaction Shares Price Value
Sep 19, 2026 Yvonne Greenstreet Director, Officer (Chief Executive Officer) Grant or award +107 — —
Jun 1, 2026 David E. I. Pyott Director Option exercise +3,830 — —
Jun 1, 2026 David E. I. Pyott Director Open-market sale −921 $297.71 $274,191
Jun 1, 2026 David E. I. Pyott Director Open-market sale −1,175 $298.91 $351,219
Jun 1, 2026 David E. I. Pyott Director Open-market sale −1,222 $299.87 $366,441
Jun 1, 2026 David E. I. Pyott Director Open-market sale −495 $300.72 $148,856
Jun 1, 2026 David E. I. Pyott Director Open-market sale −17 $302.65 $5,145
May 20, 2026 Charles Elliott Sigal Director Grant or award +671 — —
May 20, 2026 Amy W. Schulman Director Grant or award +838 — —
May 20, 2026 Colleen F. Reitan Director Grant or award +671 — —
May 20, 2026 David E. I. Pyott Director Grant or award +671 — —
May 20, 2026 Peter N. Kellogg Director Grant or award +671 — —
May 20, 2026 Margaret A. Hamburg Director Grant or award +671 — —
May 20, 2026 Olivier Brandicourt Director Grant or award +671 — —
May 20, 2026 Dennis A. Ausiello Director Grant or award +671 — —

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