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ALNY

Alnylam Pharmaceuticals, Inc.
$312.78 +11.11 (+3.68%) At close · Jul 2
Market Cap
$41.48B
Shares
132,623,144

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

The Jun 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out.
Holders: 786
Total Value: $41,009,574,422
Total Shares: 123,944,729
Showing 1–100 of 815 holdings by value · page 1 of 9

Institutional Ownership Trend

26 quarters

Superinvestors Holding ALNY

All superinvestors →
Ray Dalio $35,268,095 Joel Greenblatt $14,462,327

Holder Concentration

Across 789 13F filers
Top Holder
11.8%
Jun 2023 → Mar 2026 · range 10.7% – 13.9%
of institutional value
Top 5
41.6%
Jun 2023 → Mar 2026 · range 41.6% – 47.9%
of institutional value
Top 10
57.5%
Jun 2023 → Mar 2026 · range 57.5% – 64.7%
of institutional value
HHI
453
Jun 2023 → Mar 2026 · range 453 – 581
Broadly held
Showing 100 of 815
All Common Calls Puts
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Holder Value (USD) % of 13F Shares Open
Mega FMR LLC $4,823,808,652 11.76% 14,579,166
Mega Capital World Investors $3,574,172,882 8.72% 10,802,348
Mega BlackRock, Inc. $3,455,906,700 8.43% 10,444,908
Mega Capital Research Global Investors $3,133,729,657 7.64% 9,471,181
Mega JPMORGAN CHASE & CO $2,092,339,815 5.10% 6,323,752
Mega VANGUARD CAPITAL MANAGEMENT LLC $1,967,586,614 4.80% 5,946,706
Mega T. Rowe Price Investment Management, Inc. $1,718,315,111 4.19% 5,193,324
Mega STATE STREET CORP $1,099,381,087 2.68% 3,322,698
Mega GEODE CAPITAL MANAGEMENT, LLC $880,241,584 2.15% 2,660,385
Large BAILLIE GIFFORD & CO $825,145,441 2.01% 2,493,866
Mega TWO SIGMA INVESTMENTS, LP $659,283,951 1.61% 1,992,577
Mega WELLINGTON MANAGEMENT GROUP LLP $640,539,501 1.56% 1,935,925
Mega Dodge & Cox $638,331,940 1.56% 1,929,253
Mega AMERICAN CENTURY COMPANIES INC $596,347,845 1.45% 1,802,363
Mega PRICE T ROWE ASSOCIATES INC /MD/ $474,053,330 1.16% 1,432,748
Mega Clearbridge Investments, LLC $448,671,631 1.09% 1,356,036
Large Orbis Allan Gray Ltd $441,653,547 1.08% 1,334,825
Mega Invesco Ltd. $427,393,371 1.04% 1,291,726
Large MARSHALL WACE, LLP $363,731,344 0.89% 1,099,318
Mega D. E. Shaw & Co., Inc. $350,411,843 0.85% 1,059,062
Mega MORGAN STANLEY $331,757,055 0.81% 1,002,681
Mega BANK OF AMERICA CORP /DE/ Bank $319,922,169 0.78% 966,912
Mega Legal & General Group Plc $309,324,075 0.75% 934,881
Mega AQR CAPITAL MANAGEMENT LLC $302,118,715 0.74% 913,104
Mega NORTHERN TRUST CORP Bank $283,926,160 0.69% 858,120
Mega VANGUARD FIDUCIARY TRUST CO Bank $278,224,612 0.68% 840,888
Large Qube Research & Technologies Ltd $277,330,932 0.68% 838,187
Mega ROYAL BANK OF CANADA Bank $261,888,563 0.64% 791,515
Mega DEUTSCHE BANK AG\ Bank $251,945,590 0.61% 761,464
Mega Amundi $247,339,881 0.60% 747,544
Large FEDERATED HERMES, INC. $227,577,679 0.55% 687,816
Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC $224,170,706 0.55% 677,519
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $222,793,299 0.54% 673,356
Mega MANUFACTURERS LIFE INSURANCE COMPANY, THE Insurance $219,156,707 0.53% 662,365
Large LOOMIS SAYLES & CO L P $169,437,533 0.41% 512,097
Mega MASSACHUSETTS FINANCIAL SERVICES CO /MA/ $164,112,841 0.40% 496,004
Mega Bank of New York Mellon Corp Bank $162,523,337 0.40% 491,200
Mega FRANKLIN RESOURCES INC $155,637,935 0.38% 470,390
Mega GOLDMAN SACHS GROUP INC $155,306,405 0.38% 469,388
Mega UBS Group AG $151,826,315 0.37% 458,870
Mega MILLENNIUM MANAGEMENT LLC $148,192,371 0.36% 447,887
Large Squarepoint Ops LLC $141,189,839 0.34% 426,723
Mega D. E. Shaw & Co., Inc. $135,259,656 0.33% 408,800
Mega RAYMOND JAMES FINANCIAL INC $134,649,528 0.33% 406,956
Mega Swiss National Bank Bank $128,284,916 0.31% 387,720
Mega DIMENSIONAL FUND ADVISORS LP $127,121,905 0.31% 384,205
Mega FIRST TRUST ADVISORS LP $126,624,279 0.31% 382,701
Mega WELLS FARGO & COMPANY/MN $122,421,900 0.30% 370,000
Mega WELLS FARGO & COMPANY/MN $113,409,991 0.28% 342,763
Mega Nuveen, LLC $106,616,900 0.26% 322,232
Mega Sumitomo Mitsui Trust Group, Inc. $104,031,152 0.25% 314,417
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $99,161,739 0.24% 299,700
Large CONGRESS ASSET MANAGEMENT CO $94,542,462 0.23% 285,739
Mega TD Asset Management Inc $93,255,047 0.23% 281,848
Large Allspring Global Investments Holdings, LLC $93,236,848 0.23% 281,793
Mega BNP PARIBAS ARBITRAGE, SA $92,962,889 0.23% 280,965
Mid GILDER GAGNON HOWE & CO LLC $92,674,040 0.23% 280,092
Large PINEBRIDGE INVESTMENTS LLC $89,804,404 0.22% 271,419
Mega CITIGROUP INC $87,142,884 0.21% 263,375
Large NOMURA ASSET MANAGEMENT INTERNATIONAL INC. $85,663,897 0.21% 258,905
Large Polar Capital Holdings Plc $85,256,596 0.21% 257,674
Large WESTFIELD CAPITAL MANAGEMENT CO LP $81,241,488 0.20% 245,539
Large Woodline Partners LP $80,693,568 0.20% 243,883
Mega AMERIPRISE FINANCIAL INC $79,389,275 0.19% 239,941
Large Pictet Asset Management Holding SA $78,720,590 0.19% 237,920
Mid Bellevue Group AG $77,603,241 0.19% 234,543
Large Man Group plc $76,883,931 0.19% 232,369
Mega California Public Employees Retirement System Pension $75,437,367 0.18% 227,997
Large Candriam S.C.A. $74,224,067 0.18% 224,330
Mega BARCLAYS PLC $72,997,531 0.18% 220,623
Mega VANGUARD ASSET MANAGEMENT, Ltd $72,538,284 0.18% 219,235
Large ROYAL LONDON ASSET MANAGEMENT LTD $71,161,865 0.17% 215,075
Large JACOBS LEVY EQUITY MANAGEMENT, INC $70,211,937 0.17% 212,204
Mega CANADA PENSION PLAN INVESTMENT BOARD Pension $69,131,316 0.17% 208,938
Large Korea Investment CORP $66,280,209 0.16% 200,321
Large CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Pension $65,136,060 0.16% 196,863
Mega VICTORY CAPITAL MANAGEMENT INC $64,829,675 0.16% 195,937
Mega RHUMBLINE ADVISERS $64,611,300 0.16% 195,277
Large VOLORIDGE INVESTMENT MANAGEMENT, LLC $62,606,228 0.15% 189,217
Mega National Pension Service Pension $60,810,266 0.15% 183,789
Large BNP PARIBAS ASSET MANAGEMENT Holding S.A. $59,560,569 0.15% 180,012
Large Life Cycle Investment Partners Ltd $58,742,990 0.14% 177,541
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $57,660,053 0.14% 174,268
Large ProShare Advisors LLC $57,575,681 0.14% 174,013
Mega ENVESTNET ASSET MANAGEMENT INC $56,842,473 0.14% 171,797
Large CIBC Bancorp USA Inc. Bank $55,927,285 0.14% 169,031
Mega Mitsubishi UFJ Asset Management Co., Ltd. $50,357,421 0.12% 152,197
Mid SCS Capital Management LLC $49,480,615 0.12% 149,547
Large VOYA INVESTMENT MANAGEMENT LLC $49,130,223 0.12% 148,488
Large Russell Investments Group, Ltd. $48,814,236 0.12% 147,533
Mega JANUS HENDERSON GROUP PLC $48,667,337 0.12% 147,089
Mid ANTIPODES PARTNERS Ltd $48,078,719 0.12% 145,310
Large CAPITAL FUND MANAGEMENT S.A. $46,357,864 0.11% 140,109
Large Universal- Beteiligungs- und Servicegesellschaft mbH $46,225,185 0.11% 139,708
Large Aberdeen Group plc $45,769,576 0.11% 138,331
Large Handelsbanken Fonder AB $45,151,181 0.11% 136,462
Large BROWN ADVISORY INC $44,321,027 0.11% 133,953
Mid Soleus Capital Management, L.P. $43,559,035 0.11% 131,650
Large Assenagon Asset Management S.A. $42,647,819 0.10% 128,896
Large HRT FINANCIAL LP $42,560,800 0.10% 128,633
Key facts CIK 1178670 CUSIP 02043Q107 13F (30d) 26 filings 6 filers Visit website Investor relations

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