Alnylam Pharmaceuticals, Inc. ALNY

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156.66 USD -4.42 (-2.74%)

At closeNov 6, 2026, 7:06 AM EST

156.14 -0.52 -0.33%

Pre-market · Nov 6, 7:06 AM ET

156.37 Day range 168.50

156.00 52-week range 479.79

Held by insiders 0.18%

Held by institutions 101.79%

Float held by institutions 101.98%

Institutions 1,178

Top institutional holders
Holder	% held	Shares	Value	Reported
FMR, LLC	11.22%	15,023,962	2.35B	Jun 29, 2026
Capital World Investors	8.32%	11,144,846	1.75B	Jun 29, 2026
Blackrock Inc.	8.14%	10,907,675	1.71B	Jun 29, 2026
Capital Research Global Investors	7.28%	9,750,699	1.53B	Jun 29, 2026
Vanguard Portfolio Management LLC	4.88%	6,538,390	1.02B	Jun 29, 2026
Vanguard Capital Management LLC	4.50%	6,029,478	944.58M	Jun 29, 2026

Top mutual fund holders
Holder	% held	Shares	Value	Reported
Growth Fund of America	6.69%	8,960,487	1.40B	Sep 29, 2026
Amcap Fund	3.38%	4,526,680	709.15M	Sep 29, 2026
VANGUARD INDEX FUNDS-Vanguard Total Stock Market Index Fund	3.16%	4,239,087	664.10M	Jun 29, 2026
VANGUARD INDEX FUNDS-Vanguard Mid-Cap Index Fund	2.16%	2,893,030	453.22M	Jun 29, 2026
Invesco QQQ Trust, Series 1	2.09%	2,794,074	437.72M	Sep 29, 2026
VANGUARD SPECIALIZED FUNDS-Vanguard Health Care Fund	1.60%	2,136,580	334.72M	Jul 30, 2026

ALNY insiders
Insider	Relation	Latest transaction	Date	Shares held
BONNEY MICHAEL W	Director	Sale	Aug 17, 2025	20,804
FITZGERALD KEVIN JOSEPH	Officer	Sale	Mar 4, 2026	21,106
GARG PUSHKAL	Officer	Sale	Mar 4, 2026	19,374
GREENSTREET YVONNE L	Chief Executive Officer	Stock Award(Grant)	Sep 17, 2026	96,209
POULTON JEFFREY V	Chief Financial Officer	Sale	Mar 3, 2026	61,862
PYOTT DAVID E I	Director	Sale	May 31, 2026	29,482

Held by funds