ALNYLAM PHARMACEUTICALS INC

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ALNY·02043Q107·US·Common Stock·Healthcare - Biotechnology-13D/G

ALNY institutional ownership changes in Q2 2026: 153 institutions opened or added positions, 146 trimmed or exited. ALNY (ALNYLAM PHARMACEUTICALS INC) is held by 295 institutional investors as of Q2 2026. Top institutional shareholders: FMR LLC ($4.5B), Capital World Investors ($3.4B), BlackRock, Inc. ($3.3B). Net institutional sentiment: Mixed.

295

Holders

(21 Elite)

$36.9B

Total Value

51% (299)

Consensus

153 buying - 146 selling

13F: Jun 30, 2026Insider & Congress: Updated regularly

Smart Money Verdict

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Institutional (13F)54

Insider (Form 4)49

Activist (13D/13G)59

Congressional (STOCK Act)70

Holder Quality

51

★★★★★

Elite

75

★★★★

Strong

59

★★★

Solid

17

★★

Below

60

★

Weak

Held by 295 funds

21 elite

Who's Trading

Source dates: Price Oct 22, 2026 · Insiders Oct 6, 2026 · Activists May 14, 2026 · Congress Sep 9, 2026

InsiderSBSUPRAN BRYANSell $399KOct 2, 2026

InsiderGYGreenstreet YvonneVest 107 shSep 19, 2026

CongressCBCory A. BookerSale $1,001 - $15,000Aug 11, 2026

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Top Holders

Top Holders (295)History

AllNewIncreasedHeldDecreasedExitedFirst report

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Fund	Action	Shares	Value	Weight	Est. P&L	Conviction
FMR LLC	Increased	15M(+3.0%)	$4.5B	0.2%	+23.62%	39
Capital World Investors	Increased	11.1M(+3.2%)	$3.4B	0.4%	+16.34%	39
BlackRock, Inc.	Increased	10.9M(+4.4%)	$3.3B	0.0%	-18.16%	33
Capital Research Global Investors	Increased	9.8M(+3.0%)	$2.9B	0.4%	-11.86%	39
VPVANGUARD PORTFOLIO MANAGEMENT LLC	Increased	6.5M(+0.7%)	$2B	0.1%	-29.89%	32
VAVANGUARD CAPITAL MANAGEMENT LLC	Increased	6M(+1.4%)	$1.8B	0.0%	-29.85%	32
Invesco Ltd.	Decreased	3.8M(-7.9%)	$1.1B	0.1%	-36.91%	0
STATE STREET CORP	Increased	3.6M(+7.0%)	$1.1B	0.0%	+58.53%	34
GEODE CAPITAL MANAGEMENT, LLC	Decreased	2.6M(-0.9%)	$791.3M	0.0%	+37.38%	0
JPMORGAN CHASE & CO	Decreased	2.7M(-57.7%)	$785.3M	0.0%	-36.16%	0
BAILLIE GIFFORD & CO	Decreased	2.4M(-2.2%)	$734.5M	0.7%	+127.32%	0
WELLINGTON MANAGEMENT GROUP LLP	Increased	2.1M(+9.0%)	$635.3M	0.1%	+48.59%	41
Orbis Allan Gray Ltd	Increased	2M(+48.9%)	$598.3M	2.1%	-17.58%	74
DODGE & COX	Increased	2M(+1.4%)	$588.6M	0.3%	+132.98%	38
TWO SIGMA INVESTMENTS, LP	Decreased	1.9M(-5.8%)	$564.7M	0.4%	-31.48%	0
AMERICAN CENTURY COMPANIES INC	Increased	1.9M(+2.9%)	$558.1M	0.2%	+11.29%	39
Clearbridge Investments, LLC	Decreased	1.3M(-7.1%)	$379.1M	0.3%	-30.69%	0
PRICE T ROWE ASSOCIATES INC /MD/	Decreased	1.1M(-19.8%)	$345.9M	0.0%	+83.15%	0
DED. E. Shaw & Co., Inc.	Increased	1.1M(+4.3%)	$332.4M	0.2%	-32.72%	39
MORGAN STANLEY	Increased	1M(+2.9%)	$310.7M	0.0%	-20.91%	32

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High Conviction Moves-Smart Money Convergence-Fund Consensus-Double-Down Detection

Data sourced from four public-disclosure sources: SEC 13F, Form 4, 13D/13G, and House/Senate STOCK Act disclosures. Not financial advice. Full disclaimer