Alnylam Pharmaceuticals Ownership | Who Owns Alnylam Pharmaceuticals?

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Alnylam Pharmaceuticals Ownership Summary

Alnylam Pharmaceuticals is owned by 95.66% institutional investors, 0.42% insiders, and 3.92% retail investors. Capital world investors is the largest institutional shareholder, holding 11.87% of ALNY shares. Capital Group Growth Fnd of Amer Comp is the top mutual fund, with 8.19% of its assets in Alnylam Pharmaceuticals shares.

ALNY Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Alnylam Pharmaceuticals	95.66%	0.42%	3.92%
Sector	Healthcare Stocks	88.01%	8.90%	3.09%
Industry	Biotech Stocks	109.70%	8.77%	-18.47%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Capital world investors	14.97M	11.87%	$3.64B
Vanguard group	12.51M	9.92%	$3.04B
Fmr	12.16M	9.64%	$2.96B
Blackrock funding, inc. /de	9.89M	7.69%	$2.33B
Blackrock	9.55M	7.57%	$2.32B
Wellington management group llp	6.21M	4.92%	$1.51B
Regeneron pharmaceuticals	4.44M	3.46%	$1.05B
Baillie gifford	4.04M	3.14%	$950.71M
Capital investors	3.89M	3.08%	$945.65M
Dodge & cox	3.78M	3.00%	$918.58M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Regeneron pharmaceuticals	4.44M	95.54%	$1.05B
Bridger management	37.02K	4.63%	$9.00M
Bellevue group	919.83K	3.63%	$223.52M
Eagle health investments lp	76.26K	3.25%	$18.53M
Casdin capital	170.00K	3.15%	$41.31M
Rosenblum silverman sutton s f inc /ca	35.20K	2.29%	$8.55M
683 capital management	122.90K	2.26%	$29.86M
Silverarc capital management	36.00K	2.06%	$8.75M
Rhenman & partners asset management ab	85.50K	1.99%	$20.78M
Artia global partners lp	35.00K	1.64%	$8.51M

Top Buyers

Holder	Shares	% Assets	Change
Regeneron pharmaceuticals	4.44M	95.54%	4.44M
Norges bank	2.30M	0.08%	2.30M
Fmr	12.16M	0.19%	2.20M
Capital world investors	14.97M	0.59%	2.18M
Orbis allan gray	721.05K	1.09%	721.05K

Top Sellers

Holder	Shares	% Assets	Change
Wellington management group llp	6.21M	0.27%	-998.53K
Baillie gifford	4.04M	0.73%	-846.74K
Deep track capital, lp	-	-	-500.00K
Logos global management lp	-	-	-500.00K
Avoro capital advisors	-	-	-400.00K

New Positions

Holder	Shares	% Assets	Change	Value
Regeneron pharmaceuticals	4.44M	95.54%	4.44M	$1.05B
Norges bank	2.30M	0.08%	2.30M	$558.12M
Orbis allan gray	721.05K	1.09%	721.05K	$175.22M
Raymond james financial	277.49K	0.02%	277.49K	$65.30M
Jennison associates	259.91K	0.04%	259.91K	$61.16M

Sold Out

Holder	Change
Harbor investment advisory	-1.00
Salem investment counselors	-1.00
Financial gravity asset management	-1.00
Johnson financial group	-1.00
Addison advisors	-2.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Sep 30, 2024	599	4.17%	123,006,457	2.58%	95	1.07%	320	10.73%	170	4.94%
Jun 30, 2024	571	3.25%	119,905,127	6.57%	95	1.19%	286	4.38%	162	3.18%
Mar 31, 2024	553	3.56%	112,509,382	-3.80%	89	1.02%	274	3.40%	157	1.95%
Dec 31, 2023	534	8.32%	116,949,479	0.55%	93	1.09%	265	28.02%	154	-7.23%
Sep 30, 2023	493	0.20%	116,310,429	-1.58%	92	1.03%	207	-2.82%	166	7.10%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Capital Group Growth Fnd of Amer Comp	10.57M	8.19%	-274.74K
American Funds Growth Fund of Amer A	10.57M	8.19%	-274.74K
Vanguard Total Stock Mkt Idx Inv	4.04M	3.13%	3.61K
American Funds AMCAP A	3.73M	2.89%	658.62K
Capital Group AMCAP Composite	3.73M	2.89%	658.62K
VA CollegeAmerica Amcap 529A	3.73M	2.89%	658.62K
Vanguard Health Care Inv	3.52M	2.73%	-497.08K
Capital Group New Perspective Comp	2.93M	2.27%	-778.02K
American Funds New Perspective A	2.93M	2.27%	-778.02K
Vanguard Mid Cap Index Institutional	2.77M	2.15%	35.34K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Jan 27, 2025	Garg Pushkal	CMO & EVP Dev & Med Affairs	Sell	$14.99M
Jan 23, 2025	SHARP PHILLIP A	-	Sell	$3.09M
Dec 12, 2024	Garg Pushkal	CMO & EVP Dev & Med Affairs	Sell	$195.81K
Dec 12, 2024	Garg Pushkal	CMO & EVP Dev & Med Affairs	Sell	$46.31K
Dec 12, 2024	Garg Pushkal	CMO & EVP Dev & Med Affairs	Sell	$29.95K

Insider Transactions Trends

Date	Buy	Sell
2025 Q1	-	2
2024 Q4	-	36
2024 Q3	-	16
2024 Q2	-	67
2024 Q1	-	46

ALNY Ownership FAQ

Who Owns Alnylam Pharmaceuticals?

Alnylam Pharmaceuticals shareholders are primarily institutional investors at 95.66%, followed by 0.42% insiders and 3.92% retail investors. The average institutional ownership in Alnylam Pharmaceuticals's industry, Biotech Stocks , is 109.70%, which Alnylam Pharmaceuticals falls below.

Who owns the most shares of Alnylam Pharmaceuticals?

Alnylam Pharmaceuticals’s largest shareholders are Capital world investors (14.97M shares, 11.87%), Vanguard group (12.51M shares, 9.92%), and Fmr (12.16M shares, 9.64%). Together, they hold 31.43% of Alnylam Pharmaceuticals’s total shares outstanding.

Does Blackrock own Alnylam Pharmaceuticals?

Yes, BlackRock owns 7.57% of Alnylam Pharmaceuticals, totaling 9.55M shares as of Jun 2024. This represents 0.05% of BlackRock's total assets, with a market value of 2.32B$. In the last quarter, BlackRock increased its holdings by 522.66K shares, a 5.79% change.

Who is Alnylam Pharmaceuticals’s biggest shareholder by percentage of total assets invested?

Regeneron pharmaceuticals is Alnylam Pharmaceuticals’s biggest shareholder by percentage of total assets invested, with 95.54% of its assets in 4.44M Alnylam Pharmaceuticals shares, valued at 1.05B$.

Who is the top mutual fund holder of Alnylam Pharmaceuticals shares?

Capital Group Growth Fnd of Amer Comp is the top mutual fund holder of Alnylam Pharmaceuticals shares, with 8.19% of its total shares outstanding invested in 10.57M Alnylam Pharmaceuticals shares.

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