SEC Form 4 · Updated Daily

ALNY

— ALNYLAM PHARMACEUTICALS, INC. Ownership

Insider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.

Financials Ownership

Current Reporting Owners

Owner	Role	Shares Owned	As Of	Last Activity
SANOFI-AVENTIS	10%+ Owner	10,554,134	2017-05-31	P
NOVARTIS AG	10%+ Owner	4,051,002	2012-09-20	S
NOVARTIS INC	10%+ Owner	4,051,002	2012-09-20	S
ATLAS VENTURE ENTREPRENEURS FUND VI LP	10%+ Owner	747,580	2006-02-24	S
ATLAS VENTURE FUND V LP	10%+ Owner	747,580	2006-02-24	S
Atlas Venture Associates VI, L.P.	10%+ Owner	747,580	2006-02-24	S
Atlas Venture Fund VI GmbH & Co KG	10%+ Owner	747,580	2006-02-24	S
ATLAS VENTURE ENTREPRENEURS FUND V LP	10%+ Owner	747,580	2006-02-24	S
ATLAS VENTURE FUND VI LP	10%+ Owner	747,580	2006-02-24	S
ATLAS VENTURE ASSOCIATES V LP	10%+ Owner	747,580	2006-02-24	S
ATLAS VENTURE PARALLEL FUND V-A C V	10%+ Owner	747,580	2006-02-24	S
Barrett Peter	Director	289,024	2006-03-07	S
MARAGANORE JOHN	Director	234,299	2021-12-21	A
Greene Barry E	Director	114,873	2020-09-09	M
Greenstreet Yvonne	Director · Officer	95,802	2026-09-19	A
Poulton Jeffrey V.	Officer	64,159	2026-03-04	S
STARR KEVIN P	10%+ Owner	37,500	2015-11-12	M
Tanguler Tolga	Officer	36,500	2026-03-04	S
BONNEY MICHAEL W	Director	28,054	2025-08-18	M
SCHIMMEL PAUL	Director	27,823	2018-03-13	M
Vaishnaw Akshay	Director	26,831	2023-08-03	A
Allen Patricia L	Director	25,000	2009-04-22	M
SCHULMAN AMY W	10%+ Owner	24,049	2026-05-20	A
CLARKE JOHN K	Director	23,891	2018-05-31	M
Garg Pushkal	Officer	23,300	2026-03-04	S
Fitzgerald Kevin Joseph	Officer	21,831	2026-03-04	S
Reid Laurence	Officer	20,905	2014-12-31	M
PAUL STEVEN M	Director	16,000	2022-04-01	M
KEATING LAURIE	Officer	15,132	2021-08-05	M
McLaughlin Melissa	Officer	13,088	2026-04-02	S
SUPRAN BRYAN	Officer	12,807	2026-10-02	S
VINCENT JAMES L	Director	12,100	2010-06-18	M
SHARP PHILLIP A	Director	11,250	2025-01-23	M
Hesslein Robert W.	Officer	8,002	2025-03-03	A
PYOTT DAVID E I	Director	5,412	2026-06-01	M
Franchini Indrani Lall	Officer	4,462	2024-02-27	M
HAMBURG MARGARET A	Director	1,582	2026-05-20	A
Ausiello Dennis A	Director	1,582	2026-05-20	A
BRANDICOURT OLIVIER	Director	1,446	2026-05-20	A
Sigal Charles Elliott	Director	1,446	2026-05-20	A
KELLOGG PETER N	Director	1,446	2026-05-20	A
Reitan Colleen F	Director	1,446	2026-05-20	A
Mason Michael	Officer	1,012	2018-08-13	A
Gros David-Alexandre C	Officer	1,000	2016-02-22	P
Bertozzi Carolyn R	Director	775	2025-05-08	A
Arbuckle Stuart A	Director	671	2026-05-20	A
KOBLAN KENNETH S	Officer	357	2010-12-08	—
Fanucci Marsha	Director	136	2023-02-23	M
Soni Manmeet Singh	Officer	83	2018-07-10	J
DZAU VICTOR J	Director	0	2007-04-02	—

Recent Filings

Date	Owner	Activity	Shares	Price	Owned After
2026-10-02	SUPRAN BRYAN	Open-market sale	1,758	$226.88	12,807
2026-09-19	Greenstreet Yvonne	Grant / award	107	$0.00	95,802
2026-06-01	Cravatt Benjamin	Grant / award (derivative)	4,393	$0.00	4,393
2026-06-01	PYOTT DAVID E I	Option exercise (derivative)	3,830	$0.00	0
2026-06-01	PYOTT DAVID E I	Open-market sale	17	$302.65	1,582
2026-06-01	PYOTT DAVID E I	Open-market sale	495	$300.72	1,599
2026-06-01	PYOTT DAVID E I	Open-market sale	1,222	$299.87	2,094
2026-06-01	PYOTT DAVID E I	Open-market sale	1,175	$298.91	3,316
2026-06-01	PYOTT DAVID E I	Open-market sale	921	$297.71	4,491
2026-06-01	PYOTT DAVID E I	Option exercise	3,830	$0.00	5,412
2026-05-20	Arbuckle Stuart A	Grant / award (derivative)	1,441	$0.00	1,441
2026-05-20	Arbuckle Stuart A	Grant / award	671	$0.00	671
2026-05-20	Ausiello Dennis A	Grant / award (derivative)	1,441	$0.00	1,441
2026-05-20	Ausiello Dennis A	Grant / award	671	$0.00	1,582
2026-05-20	BRANDICOURT OLIVIER	Grant / award (derivative)	1,441	$0.00	1,441
2026-05-20	BRANDICOURT OLIVIER	Grant / award	671	$0.00	1,446
2026-05-20	HAMBURG MARGARET A	Grant / award (derivative)	1,441	$0.00	1,441
2026-05-20	HAMBURG MARGARET A	Grant / award	671	$0.00	1,582
2026-05-20	KELLOGG PETER N	Grant / award (derivative)	1,441	$0.00	1,441
2026-05-20	KELLOGG PETER N	Grant / award	671	$0.00	1,446
2026-05-20	PYOTT DAVID E I	Grant / award (derivative)	1,441	$0.00	1,441
2026-05-20	PYOTT DAVID E I	Grant / award	671	$0.00	1,582
2026-05-20	Reitan Colleen F	Grant / award (derivative)	1,441	$0.00	1,441
2026-05-20	Reitan Colleen F	Grant / award	671	$0.00	1,446
2026-05-20	SCHULMAN AMY W	Grant / award (derivative)	1,802	$0.00	1,802
2026-05-20	SCHULMAN AMY W	Grant / award	838	$0.00	24,049
2026-05-20	Sigal Charles Elliott	Grant / award (derivative)	1,441	$0.00	1,441
2026-05-20	Sigal Charles Elliott	Grant / award	671	$0.00	1,446
2026-05-13	SCHULMAN AMY W	Option exercise (derivative)	11,250	$0.00	0
2026-05-13	SCHULMAN AMY W	Option exercise	11,250	$70.20	23,211
2026-04-06	McLaughlin Melissa	Open-market sale	199	$333.94	9,443
2026-04-06	McLaughlin Melissa	Open-market sale	293	$331.89	9,642
2026-04-06	McLaughlin Melissa	Open-market sale	829	$330.46	9,935
2026-04-06	McLaughlin Melissa	Open-market sale	909	$329.76	10,764
2026-04-06	McLaughlin Melissa	Open-market sale	56	$320.14	11,673
2026-04-02	McLaughlin Melissa	Open-market sale	8	$325.49	11,729
2026-04-02	McLaughlin Melissa	Open-market sale	81	$323.64	11,737
2026-04-02	McLaughlin Melissa	Open-market sale	245	$322.86	11,818
2026-04-02	McLaughlin Melissa	Open-market sale	224	$321.64	12,063
2026-04-02	McLaughlin Melissa	Open-market sale	147	$320.62	12,287

Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.