Alnylam Pharmaceuticals ALNY Institutional Ownership

NASDAQ ALNY

$266.11 +1.61 (+0.61%)

At close: Sep 4, 2026 · 4:00 PM EDT

Institutions by Trading Activity

785 Institutions

Increased 410 52.2%

Unchanged 97 12.4%

Reduced 278 35.4%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

100.38%

▲+3.54 pp QoQ

Shares Held by Institutions

134.11Mn

of 133.61Mn outstanding

▲+4.85% QoQ

Shares Outstanding

133.61Mn

-502.39K held outside 13F filers

Institutional Investors

785

filed 13F for Jun 2026

▲+1 vs prior quarter

Net Shares Added (QoQ)

+6.20Mn

accumulated since last quarter

Value of Holdings

$35.69Bn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Quarter ending 30 Jun, 2026

Alnylam Pharmaceuticals, Inc. (NASDAQ:ALNY) appears in 785 institutional 13F filings for the quarter ending June 2026.

These investors collectively held 100.4% of Alnylam Pharmaceuticals's outstanding shares in June 2026, up from 96.8% in March 2026.
They increased total shares held in ALNY by 4.85% quarter over quarter, and investors in Alnylam Pharmaceuticals increased 20.58% from a year ago.
During the quarter, 410 of these 785 funds increased positions in ALNY, 278 reduced exposure, and 97 held steady.
Altogether, these fund groups held 134.11Mn shares in ALNY by June 2026, up by 6.2Mn shares quarter on quarter, and up 989.26K shares year over year.
FMR LLC leads ownership in ALNY with 15.02Mn shares as of June 30, 2026, equal to 11.24% of outstanding shares.
Leading buyers of Alnylam Pharmaceuticals shares for the quarter ending June 2026 were Invesco Ltd. (2.46Mn), NORGES BANK (2.27Mn), Deep Track Capital, LP (825.0K), Sixth Street Partners Management Company, L.P. (755.38K), Orbis Allan Gray Ltd (652.58K).
The largest sales of ALNY for the quarter ending June 2026 came from Jpmorgan Chase & Co (3.65Mn), MARSHALL WACE, LLP (839.52K), PRICE T ROWE ASSOCIATES INC /MD/ (283.55K), Allspring Global Investments Holdings, LLC (279.25K), Bellevue Group AG (233.45K).
Business Quant data shows the 10 biggest positions in Alnylam Pharmaceuticals as of June 2026 are held by FMR LLC (15.02Mn), Capital World Investors (11.14Mn), BlackRock, Inc. (10.91Mn), Capital Research Global Investors (9.75Mn), VANGUARD PORTFOLIO MANAGEMENT LLC (6.54Mn), VANGUARD CAPITAL MANAGEMENT LLC (6.03Mn), T. Rowe Price Investment Management, Inc. (5.64Mn), Invesco Ltd. (3.75Mn), State Street Corp (3.56Mn), Jpmorgan Chase & Co (2.68Mn).

Form 13F Holdings

785 Institutional Holders

Report period 30 Jun, 2026

Total shares held 134.11Mn

Of outstanding 100.38%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	FMR LLC	0000315066	15,023,962	11.24%	▲444,796	+3.05%	$4.52Bn
2	Capital World Investors	0001422849	11,144,846	8.34%	▲342,498	+3.17%	$3.35Bn
3	BlackRock, Inc.	0002012383	10,907,675	8.16%	▲462,767	+4.43%	$3.28Bn
4	Capital Research Global Investors	0001422848	9,750,699	7.30%	▲279,518	+2.95%	$2.94Bn
5	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	6,538,390	4.89%	▲47,110	+0.73%	$1.97Bn
6	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	6,029,478	4.51%	▲82,772	+1.39%	$1.82Bn
7	T. Rowe Price Investment Management, Inc.	0001897612	5,642,173	4.22%	▲448,849	+8.64%	$1.70Mn
8	Invesco Ltd.	0000914208	3,754,318	2.81%	▲2,462,592	+190.64%	$1.13Bn
9	State Street Corp	0000093751	3,555,689	2.66%	▲232,991	+7.01%	$1.07Bn
10	Jpmorgan Chase & Co	0000019617	2,675,517	2.00%	▼3,648,235	-57.69%	$785.32Mn
11	GEODE CAPITAL MANAGEMENT, LLC	0001214717	2,635,840	1.97%	▼24,545	-0.92%	$791.35Mn
12	BAILLIE GIFFORD & CO	0001088875	2,439,889	1.83%	▼53,977	-2.16%	$734.48Mn
13	NORGES BANK	0001374170	2,271,813	1.70%	▲2,271,813	0.00%	$683.88Mn
14	WELLINGTON MANAGEMENT GROUP LLP	0000902219	2,110,407	1.58%	▲174,482	+9.01%	$635.30Mn
15	Orbis Allan Gray Ltd	0001663865	1,987,407	1.49%	▲652,582	+48.89%	$598.27Mn
16	DODGE & COX	0000200217	1,955,393	1.46%	▲26,140	+1.35%	$588.63Mn
17	TWO SIGMA INVESTMENTS, LP	0001179392	1,875,937	1.40%	▼116,640	-5.85%	$564.71Mn
18	AMERICAN CENTURY COMPANIES INC	0000748054	1,853,956	1.39%	▲51,593	+2.86%	$558.10Mn
19	Clearbridge Investments, LLC	0001348883	1,259,483	0.94%	▼96,553	-7.12%	$379.14Mn
20	PRICE T ROWE ASSOCIATES INC /MD/	0000080255	1,149,201	0.86%	▼283,547	-19.79%	$345.95K

Showing 1 to 20 of 785 holders