ALNYLAM PHARMACEUTICALS INC (ALNY)
Institutional ownership reported to the SEC as of Q2 2026, across 31 quarters.
753
Reporting holders
$38.8B
Reported value
94.6%
Of shares outstanding
1.7%
Held as options
-2
Holder change
Institutions report 126,635,081 shares against 133,809,118 outstanding. Shares only - option lines are excluded, which is why this can be compared with the company at all. The count comes from the cover page of the company's own most recent report, so it is dated when that was filed rather than at quarter end. A figure this high can overstate: where an adviser and a sub-adviser both report the same shares, both are counted.
Options share is the part of reported value carried in derivative lines rather than shares. A high figure means institutions are expressing a view on this security without owning much of it.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| FMR LLC | $4.5B | 15,023,962 | 0.20% | 31q | +3.1%+$133.9M |
| Capital World Investors | $3.4B | 11,144,846 | 0.40% | 31q | +3.2%+$103.1M |
| BlackRock, Inc. | $3.3B | 10,907,675 | 0.05% | 8q | +4.4%+$139.3M |
| Capital Research Global Investors | $2.9B | 9,750,699 | 0.41% | 15q | +3.0%+$84.1M |
| VANGUARD PORTFOLIO MANAGEMENT LLC | $2.0B | 6,538,390 | 0.09% | 2q | +0.7%+$14.2M |
| VANGUARD CAPITAL MANAGEMENT LLC | $1.8B | 6,029,478 | 0.04% | 2q | +1.4%+$24.9M |
| Invesco Ltd. | $1.1B | 3,754,318 | 0.09% | 31q | -7.9%-$96.6M |
| STATE STREET CORP | $1.1B | 3,555,689 | 0.03% | 31q | +7.0%+$70.1M |
| GEODE CAPITAL MANAGEMENT, LLC | $791.3M | 2,635,840 | 0.04% | 31q | -0.9%-$7.4M |
| JPMORGAN CHASE & CO | $785.3M | 2,675,517 | 0.04% | 31q | -57.7%-$1.1B |
| BAILLIE GIFFORD & CO | $734.5M | 2,439,889 | 0.67% | 31q | -2.2%-$16.2M |
| NORGES BANK | $683.9M | 2,271,813 | 0.07% | 32q | +0.8%+$5.7M |
| WELLINGTON MANAGEMENT GROUP LLP | $635.3M | 2,110,407 | 0.11% | 31q | +9.0%+$52.5M |
| Orbis Allan Gray Ltd | $598.3M | 1,987,407 | 2.06% | 9q | +48.9%+$196.4M |
| Dodge & Cox | $588.6M | 1,955,393 | 0.31% | 31q | +1.4%+$7.9M |
| TWO SIGMA INVESTMENTS, LP | $564.7M | 1,875,937 | 0.41% | 10q | -5.9%-$35.1M |
| AMERICAN CENTURY COMPANIES INC | $558.1M | 1,853,956 | 0.25% | 31q | +2.9%+$15.5M |
| D. E. Shaw & Co., Inc. | $461.9M | 1,104,109 | 0.22% | 31q | +4.3%+$18.8M |
| Clearbridge Investments, LLC | $379.1M | 1,259,483 | 0.31% | 6q | -7.1%-$29.1M |
| MORGAN STANLEY | $310.7M | 1,032,150 | 0.02% | 35q | +2.9%+$8.9M |
| BANK OF AMERICA CORP /DE/ | $299.4M | 994,476 | 0.02% | 31q | +2.9%+$8.3M |
| Legal & General Group Plc | $278.3M | 924,561 | 0.06% | 31q | -1.1%-$3.1M |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE | $269.1M | 893,795 | 0.21% | 31q | +34.9%+$69.7M |
| ROYAL BANK OF CANADA | $268.2M | 875,859 | 0.04% | 31q | +10.7%+$25.8M |
| NORTHERN TRUST CORP | $267.0M | 886,900 | 0.03% | 31q | +3.4%+$8.7M |
| VANGUARD FIDUCIARY TRUST CO | $259.7M | 862,782 | 0.06% | 2q | +2.6%+$6.6M |
| DEUTSCHE BANK AG\ | $248.6M | 815,400 | 0.07% | 34q | +7.1%+$16.4M |
| Deep Track Capital, LP | $248.3M | 825,000 | 3.61% | new | NEW |
| Qube Research & Technologies Ltd | $240.4M | 798,715 | 0.22% | 4q | -4.7%-$11.9M |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | $240.3M | 294,460 | 0.02% | 31q | +69.0%+$98.1M |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $227.4M | 755,377 | 0.03% | 31q | +12.2%+$24.7M |
| Sixth Street Partners Management Company, L.P. | $227.4M | 755,377 | 0.03% | new | NEW |
| LOS ANGELES CAPITAL MANAGEMENT LLC | $219.6M | 729,635 | 0.81% | 11q | +726.5%+$193.1M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | $219.1M | 727,848 | 0.04% | 31q | +7.4%+$15.2M |
| AQR CAPITAL MANAGEMENT LLC | $219.0M | 728,039 | 0.08% | 14q | -20.3%-$55.7M |
| FEDERATED HERMES, INC. | $216.7M | 719,905 | 0.31% | 11q | +4.7%+$9.7M |
| WELLS FARGO & COMPANY/MN | $204.7M | 310,047 | 0.03% | 31q | -54.8%-$247.9M |
| UBS Group AG | $188.7M | 627,004 | 0.02% | 31q | +36.6%+$50.6M |
| Amundi | $185.9M | 617,471 | 0.05% | 21q | -17.4%-$39.2M |
| LOOMIS SAYLES & CO L P | $174.7M | 580,187 | 0.22% | 21q | +13.3%+$20.5M |
| GOLDMAN SACHS GROUP INC | $173.0M | 574,757 | 0.02% | 31q | +22.4%+$31.7M |
| Bank of New York Mellon Corp | $148.1M | 492,071 | 0.02% | 31q | HELD |
| Polar Capital Holdings Plc | $145.3M | 482,751 | 0.34% | 23q | +87.3%+$67.8M |
| Paradigm Biocapital Advisors LP | $144.5M | 480,000 | 2.71% | new | NEW |
| FRANKLIN RESOURCES INC | $134.8M | 447,699 | 0.03% | 30q | -4.8%-$6.8M |
| FIRST TRUST ADVISORS LP | $126.9M | 421,534 | 0.07% | 31q | +10.1%+$11.7M |
| RAYMOND JAMES FINANCIAL INC | $118.2M | 392,799 | 0.03% | 7q | -3.5%-$4.3M |
| DIMENSIONAL FUND ADVISORS LP | $118.0M | 392,022 | 0.02% | 31q | +2.0%+$2.4M |
| MILLENNIUM MANAGEMENT LLC | $114.2M | 316,001 | 0.04% | 29q | -29.4%-$47.6M |
| Swiss National Bank | $112.6M | 374,080 | 0.06% | 31q | -3.5%-$4.1M |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | $105.5M | 350,560 | 0.03% | 4q | -29.3%-$43.8M |
| CANADA PENSION PLAN INVESTMENT BOARD | $100.6M | 334,246 | 0.06% | 31q | +60.0%+$37.7M |
| Sumitomo Mitsui Trust Group, Inc. | $97.9M | 325,379 | 0.06% | 31q | +3.5%+$3.3M |
| Nuveen, LLC | $95.0M | 315,630 | 0.02% | 6q | -2.0%-$2.0M |
| CITADEL ADVISORS LLC | $94.9M | 191,029 | 0.01% | 31q | +715.8%+$83.2M |
| Candriam S.C.A. | $94.6M | 314,512 | 0.43% | 31q | +40.2%+$27.1M |
| Assenagon Asset Management S.A. | $93.7M | 311,390 | 0.06% | 16q | +141.6%+$54.9M |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | $90.4M | 300,193 | 0.14% | 3q | +15.9%+$12.4M |
| CITIGROUP INC | $84.8M | 227,786 | 0.03% | 31q | -13.5%-$13.2M |
| Pictet Asset Management Holding SA | $83.3M | 278,613 | 0.08% | 12q | +17.1%+$12.2M |
| BNP PARIBAS FINANCIAL MARKETS | $81.6M | 271,023 | 0.03% | 31q | -3.5%-$3.0M |
| GILDER GAGNON HOWE & CO LLC | $81.0M | 269,051 | 0.84% | 31q | -3.9%-$3.3M |
| CONGRESS ASSET MANAGEMENT CO | $80.0M | 265,701 | 0.49% | 4q | -7.0%-$6.0M |
| MARSHALL WACE, LLP | $78.2M | 259,799 | 0.06% | 8q | -76.4%-$252.7M |
| Squarepoint Ops LLC | $77.6M | 233,999 | 0.09% | 18q | -45.2%-$63.9M |
| VANGUARD ASSET MANAGEMENT, Ltd | $77.6M | 257,710 | 0.05% | 2q | +17.5%+$11.6M |
| California Public Employees Retirement System | $76.5M | 254,053 | 0.04% | 31q | +11.4%+$7.8M |
| WESTFIELD CAPITAL MANAGEMENT CO LP | $76.0M | 252,383 | 0.25% | 7q | +2.8%+$2.1M |
| Korea Investment CORP | $74.6M | 247,660 | 0.14% | 26q | +23.6%+$14.3M |
| Woodline Partners LP | $74.1M | 246,282 | 0.23% | 6q | +1.0%+$722.2K |
| TD Asset Management Inc | $70.3M | 233,696 | 0.06% | 31q | -17.1%-$14.5M |
| HSBC HOLDINGS PLC | $70.3M | 115,279 | 0.03% | 31q | +28.6%+$15.7M |
| ROYAL LONDON ASSET MANAGEMENT LTD | $64.3M | 213,589 | 0.12% | 32q | -0.7%-$447.3K |
| AMERIPRISE FINANCIAL INC | $61.6M | 204,601 | 0.01% | 31q | -57.4%-$82.9M |
| National Pension Service | $59.7M | 198,295 | 0.04% | 25q | +7.9%+$4.4M |
| PINEBRIDGE INVESTMENTS LLC | $58.9M | 195,709 | 0.49% | 3q | -27.9%-$22.8M |
| Robeco Institutional Asset Management B.V. | $56.6M | 188,084 | 0.07% | 19q | +48.7%+$18.5M |
| VICTORY CAPITAL MANAGEMENT INC | $52.0M | 172,842 | 0.03% | 28q | -11.8%-$7.0M |
| Man Group plc | $51.4M | 170,907 | 0.08% | 18q | -26.5%-$18.5M |
| Mitsubishi UFJ Asset Management Co., Ltd. | $50.8M | 168,664 | 0.03% | 31q | +10.8%+$5.0M |
| RHUMBLINE ADVISERS | $49.8M | 165,579 | 0.04% | 31q | -15.2%-$8.9M |
| Life Cycle Investment Partners Ltd | $49.8M | 165,424 | 0.23% | 3q | -6.8%-$3.6M |
| CIBC Bancorp USA Inc. | $49.3M | 163,733 | 0.06% | 3q | -3.1%-$1.6M |
| ANTIPODES PARTNERS Ltd | $49.2M | 163,533 | 0.90% | 15q | +12.5%+$5.5M |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | $48.6M | 161,773 | 0.05% | 26q | -10.1%-$5.5M |
| BARCLAYS PLC | $48.0M | 135,518 | 0.01% | 31q | -38.6%-$30.2M |
| Russell Investments Group, Ltd. | $47.5M | 158,228 | 0.04% | 31q | +7.2%+$3.2M |
| Universal- Beteiligungs- und Servicegesellschaft mbH | $47.2M | 157,223 | 0.07% | 7q | +12.5%+$5.3M |
| CAPITAL FUND MANAGEMENT S.A. | $46.9M | 155,904 | 0.21% | 3q | +11.3%+$4.8M |
| Vinva Investment Management Ltd | $45.5M | 154,972 | 0.30% | 4q | +323.4%+$34.7M |
| Hudson Bay Capital Management LP | $44.8M | 148,720 | 0.12% | 12q | +271.8%+$32.7M |
| 683 Capital Management, LLC | $42.9M | 35,000 | 2.11% | 10q | +66.7%+$17.2M |
| LMR Partners LLP | $42.6M | 134,214 | 0.16% | 3q | +79.8%+$18.9M |
| ENVESTNET ASSET MANAGEMENT INC | $41.1M | 136,395 | 0.01% | 26q | -20.6%-$10.7M |
| Jupiter Topco LLC | $40.8M | 135,545 | 0.02% | new | FIRST |
| ProShare Advisors LLC | $38.7M | 128,514 | 0.06% | 31q | -26.1%-$13.7M |
| SEI INVESTMENTS CO | $36.7M | 121,960 | 0.03% | 31q | +21.6%+$6.5M |
| VOYA INVESTMENT MANAGEMENT LLC | $36.7M | 121,903 | 0.03% | 31q | -17.9%-$8.0M |
| SCS Capital Management LLC | $34.8M | 115,549 | 0.33% | 6q | -22.7%-$10.2M |
| AVIVA PLC | $34.5M | 114,532 | 0.05% | 31q | HELD |
Showing the largest 100 of 794 reported holders.
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 753 | $38.8B | 126,635,081 | 81 | 300 | 251 | 1.7% |
| Q1 2026 | 755 | $41.9B | 124,606,958 | 90 | 296 | 236 | 1.9% |
| Q4 2025 | 808 | $52.2B | 127,995,210 | 117 | 266 | 264 | 2.4% |
| Q3 2025 | 778 | $60.0B | 129,022,292 | 210 | 256 | 196 | 2.0% |
| Q2 2025 | 612 | $40.9B | 124,084,691 | 80 | 237 | 195 | 1.0% |
| Q1 2025 | 594 | $32.8B | 120,134,796 | 99 | 207 | 181 | 1.5% |
| Q4 2024 | 548 | $28.3B | 118,705,418 | 59 | 204 | 160 | 1.2% |
| Q3 2024 | 522 | $33.1B | 118,079,553 | 91 | 195 | 147 | 2.0% |
| Q2 2024 | 487 | $28.9B | 113,811,986 | 79 | 165 | 152 | 4.4% |
| Q1 2024 | 457 | $17.2B | 109,721,603 | 61 | 177 | 130 | 4.4% |
| Q4 2023 | 453 | $22.1B | 112,376,174 | 69 | 145 | 125 | 2.6% |
| Q3 2023 | 405 | $19.6B | 108,616,221 | 37 | 129 | 137 | 1.9% |
| Q2 2023 | 415 | $21.1B | 109,761,817 | 42 | 139 | 128 | 1.3% |
| Q1 2023 | 402 | $25.0B | 123,235,630 | 38 | 145 | 132 | 1.3% |
| Q4 2022 | 395 | $25.2B | 103,311,802 | 62 | 130 | 116 | 2.7% |
| Q3 2022 | 495 | $27.4B | 134,109,570 | 115 | 152 | 151 | 2.1% |
| Q2 2022 | 426 | $17.4B | 113,674,754 | 50 | 122 | 161 | 4.8% |
| Q1 2022 | 448 | $19.0B | 114,228,301 | 68 | 149 | 145 | 1.8% |
| Q4 2021 | 434 | $19.5B | 112,243,817 | 56 | 153 | 123 | 2.6% |
| Q3 2021 | 406 | $21.5B | 111,606,516 | 45 | 143 | 117 | 1.9% |
| Q2 2021 | 406 | $19.6B | 112,374,532 | 57 | 131 | 124 | 2.7% |
| Q1 2021 | 392 | $15.6B | 109,389,426 | 50 | 142 | 117 | 0.9% |
| Q4 2020 | 375 | $14.4B | 108,243,206 | 38 | 119 | 122 | 2.1% |
| Q3 2020 | 360 | $16.1B | 108,540,682 | 30 | 117 | 128 | 1.7% |
| Q2 2020 | 378 | $16.8B | 111,864,445 | 74 | 131 | 108 | 1.6% |
| Q1 2020 | 337 | $12.1B | 108,784,011 | 54 | 120 | 95 | 2.4% |
| Q4 2019 | 321 | $12.7B | 107,234,492 | 58 | 89 | 99 | 2.3% |
| Q3 2019 | 286 | $8.9B | 108,842,453 | 39 | 103 | 76 | 2.2% |
| Q2 2019 | 292 | $7.9B | 106,579,628 | 39 | 112 | 70 | 2.3% |
| Q1 2019 | 296 | $9.2B | 96,930,088 | 38 | 104 | 88 | 1.5% |
| Q4 2018 | 284 | $7.0B | 93,482,266 | 3 | 9 | 7 | 2.5% |