Alnylam Pharmaceuticals, Inc. 13F holders
794 funds reported a position in Alnylam Pharmaceuticals, Inc. in their 13F for the quarter ended 30 June 2026, together 133.5 million shares worth $40.18 billion. Against the quarter before, 67 opened a position, 320 added, 281 trimmed and 80 sold out; together they sold a net 310,243 shares. The largest holders: FMR LLC, Capital World Investors and BlackRock, Inc.
Funds holding794as many as Q1 2026
Shares they held133.5Mworth $40.18 billion
Net sold on the quarter310,243 sharesabout $93.3 million at the funds' values
Funds buying to selling387 to 361opened or added, to cut or sold
Opened 67Added 320Held 121Trimmed 281Sold out 80
What each fund did in ALNY against its 13F for the quarter before; a change under 0.1% of a holding counts as held
Funds reporting a position in ALNY in their 13F, each quarter; hover a bar for the shares they held
Filed so far for the quarter to 30 September 2026
2,671 funds have filed their 13F for the quarter so far; the rest are due by 16 November 2026. Of those, 143 reported a position in Alnylam Pharmaceuticals, Inc.: 15 opened one, 44 added, 49 trimmed and 28 sold out, a net 580,482 shares sold.
The largest moves in the name among the funds that have filed, against each fund's previous 13F.
The well-known funds
Of the 44 funds followed here, 10 reported a position in Alnylam Pharmaceuticals, Inc. in a 13F for the quarter ended 30 June 2026. The largest: FMR LLC, 15.0 million shares worth $4.52 billion, 0.2% of its reported book. In the quarter, 4 funds added or opened a position and 5 trimmed or sold out; together they bought a net 584,012 shares, about $175.8 million at the funds' own value per share on 30 June 2026. A change under 0.1% of a holding counts as held.
| Fund | Shares | Value | Of its book | Change on the quarter | Status | Quarter ended | Filing |
|---|---|---|---|---|---|---|---|
| FMR LLC | 15,023,962 | $4.52 billion | 0.2% | +444,796 | added | 30 June 2026 | 13F |
| Capital Research Global Investors | 9,750,699 | $2.94 billion | 0.4% | +279,518 | added | 30 June 2026 | 13F |
| Geode Capital Management | 2,635,840 | $791.3 million | 0.0% | -24,545 | trimmed | 30 June 2026 | 13F |
| Baillie Gifford | 2,439,889 | $734.5 million | 0.7% | -53,977 | trimmed | 30 June 2026 | 13F |
| Norges Bank | 2,271,813 | $683.9 million | 0.1% | held | 30 June 2026 | 13F | |
| Dodge & Cox | 1,955,393 | $588.6 million | 0.3% | +26,140 | added | 30 June 2026 | 13F |
| Two Sigma Investments | 1,875,937 | $564.7 million | 0.4% | -116,640 | trimmed | 30 June 2026 | 13F |
| Millennium Management | 316,001 | $95.1 million | 0.1% | -131,886 | trimmed | 30 June 2026 | 13F |
| Citadel Advisors | 191,029 | $57.5 million | 0.0% | +167,614 | added | 30 June 2026 | 13F |
| Bridgewater Associates | 99,584 | $30.0 million | 0.1% | -7,008 | trimmed | 30 June 2026 | 13F |
Value is what the fund reported.
Read more
Change is shares against the fund's previous 13F; a fund with one filing read shows no change. 13Fs cover long US positions of managers above $100 million and are filed up to 45 days after the quarter.The largest holders
| Fund | Shares | Share of all | Value | Of its book | Change in shares | Filing |
|---|---|---|---|---|---|---|
| FMR LLC | 15,023,962 | 11.25% | $4.52 billion | 0.20% | +444,796 | 13F |
| Capital World Investors | 11,144,846 | 8.35% | $3.35 billion | 0.40% | +342,498 | 13F |
| BlackRock, Inc. | 10,907,675 | 8.17% | $3.28 billion | 0.05% | +462,767 | 13F |
| Capital Research Global Investors | 9,750,699 | 7.30% | $2.94 billion | 0.41% | +279,518 | 13F |
| Vanguard Portfolio Management LLC | 6,538,390 | 4.90% | $1.97 billion | 0.09% | +47,110 | 13F |
| Vanguard Capital Management LLC | 6,029,478 | 4.51% | $1.82 billion | 0.04% | +82,772 | 13F |
| T. Rowe Price Investment Management, Inc. | 5,642,173 | 4.22% | $1.70 billion | 1.11% | +448,849 | 13F |
| Invesco Ltd. | 3,754,318 | 2.81% | $1.13 billion | 0.09% | -320,802 | 13F |
| State Street Corp. | 3,555,689 | 2.66% | $1.07 billion | 0.03% | +232,991 | 13F |
| Geode Capital Management, LLC | 2,635,840 | 1.97% | $791.3 million | 0.04% | -24,545 | 13F |
| JPMorgan Chase & Co. | 2,675,517 | 2.00% | $785.3 million | 0.05% | -3,648,235 | 13F |
| Baillie Gifford & Co. | 2,439,889 | 1.83% | $734.5 million | 0.67% | -53,977 | 13F |
| Norges Bank | 2,271,813 | 1.70% | $683.9 million | 0.07% | 13F | |
| Wellington Management Group LLP | 2,110,407 | 1.58% | $635.3 million | 0.11% | +174,482 | 13F |
| Orbis Allan Gray Ltd | 1,987,407 | 1.49% | $598.3 million | 2.06% | +652,582 | 13F |
| Dodge & Cox | 1,955,393 | 1.46% | $588.6 million | 0.31% | +26,140 | 13F |
| Two Sigma Investments, LP | 1,875,937 | 1.40% | $564.7 million | 0.44% | -116,640 | 13F |
| American Century Companies Inc. | 1,853,956 | 1.39% | $558.1 million | 0.25% | +51,593 | 13F |
| Clearbridge Investments, LLC | 1,259,483 | 0.94% | $379.1 million | 0.31% | -96,553 | 13F |
| Price T Rowe Associates Inc. | 1,149,201 | 0.86% | $345.9 million | 0.04% | -283,547 | 13F |
| D. E. Shaw & Co., Inc. | 1,104,109 | 0.83% | $332.4 million | 0.22% | +45,047 | 13F |
| Morgan Stanley | 1,032,150 | 0.77% | $310.7 million | 0.02% | +29,469 | 13F |
| Bank of America Corp. | 994,476 | 0.74% | $299.4 million | 0.02% | +27,564 | 13F |
| Legal & General Group Plc | 924,561 | 0.69% | $278.3 million | 0.06% | -10,320 | 13F |
| Manufacturers Life Insurance Company, the | 893,795 | 0.67% | $269.1 million | 0.21% | +231,430 | 13F |
| Northern Trust Corp. | 886,900 | 0.66% | $267.0 million | 0.03% | +28,780 | 13F |
| Royal Bank of Canada | 875,859 | 0.66% | $263.7 million | 0.04% | +84,344 | 13F |
| Vanguard Fiduciary Trust Co. | 862,782 | 0.65% | $259.7 million | 0.06% | +21,894 | 13F |
| Deep Track Capital, LP | 825,000 | 0.62% | $248.3 million | 3.66% | new | 13F |
| Deutsche Bank AG | 815,400 | 0.61% | $245.5 million | 0.07% | +53,936 | 13F |
| Qube Research & Technologies Ltd | 798,715 | 0.60% | $240.4 million | 0.27% | -39,472 | 13F |
| Charles Schwab Investment Management Inc. | 755,377 | 0.57% | $227.4 million | 0.03% | +82,021 | 13F |
| Los Angeles Capital Management LLC | 729,635 | 0.55% | $219.6 million | 0.81% | +641,357 | 13F |
| UBS AM, a distinct business unit of UBS Asset Management Americas LLC | 727,848 | 0.55% | $219.1 million | 0.04% | +50,329 | 13F |
| AQR Capital Management LLC | 728,039 | 0.55% | $219.0 million | 0.08% | -185,065 | 13F |
| Federated Hermes, Inc. | 719,905 | 0.54% | $216.7 million | 0.31% | +32,089 | 13F |
| UBS Group AG | 627,004 | 0.47% | $188.7 million | 0.03% | +168,134 | 13F |
| Amundi | 617,471 | 0.46% | $185.9 million | 0.04% | -130,073 | 13F |
| Loomis Sayles & Co. L P | 580,187 | 0.43% | $174.7 million | 0.22% | +68,090 | 13F |
| Goldman Sachs Group Inc. | 574,757 | 0.43% | $173.0 million | 0.02% | +105,369 | 13F |
| Bank of New York Mellon Corp | 492,071 | 0.37% | $148.1 million | 0.02% | +871 | 13F |
| Polar Capital Holdings Plc | 482,751 | 0.36% | $145.3 million | 0.41% | +225,077 | 13F |
| Paradigm Biocapital Advisors LP | 480,000 | 0.36% | $144.5 million | 2.71% | new | 13F |
| Franklin Resources Inc. | 447,699 | 0.34% | $134.8 million | 0.03% | -22,691 | 13F |
| First Trust Advisors LP | 421,534 | 0.32% | $126.9 million | 0.07% | +38,833 | 13F |
| Raymond James Financial Inc. | 392,799 | 0.29% | $118.2 million | 0.03% | -14,157 | 13F |
| Dimensional Fund Advisors LP | 392,022 | 0.29% | $118.0 million | 0.02% | +7,817 | 13F |
| Swiss National Bank | 374,080 | 0.28% | $112.6 million | 0.06% | -13,640 | 13F |
| Massachusetts Financial Services Co. | 350,560 | 0.26% | $105.5 million | 0.03% | -145,444 | 13F |
| Canada Pension Plan Investment Board | 334,246 | 0.25% | $100.6 million | 0.06% | +125,308 | 13F |
The 50 largest of the 794 funds that reported a position in ALNY in their 13F for the quarter ended 30 June 2026, by the value each reported.
Read more
Share of all is the fund's part of all the shares the funds reported. Change is shares against the fund's 13F for the quarter before. A 13F lists a manager's long positions in US-listed shares at the quarter's end. What is a 13F?Options the funds reported on ALNY
| Fund | Option | Shares under the options | Value of those shares | Quarter ended | Filing |
|---|---|---|---|---|---|
| Citadel Advisors | Calls | 81,600 | $24.6 million | 30 June 2026 | 13F |
| Millennium Management | Calls | 43,000 | $12.9 million | 30 June 2026 | 13F |
| Citadel Advisors | Puts | 42,500 | $12.8 million | 30 June 2026 | 13F |
| Millennium Management | Puts | 20,200 | $6.1 million | 30 June 2026 | 13F |
| Point72 Asset Management | Calls | 2,200 | $662,266 | 30 June 2026 | 13F |
A 13F lists calls and puts by the shares they cover and what those shares were worth at the quarter's end, not what the options cost.
Read more
They are not counted in the holdings above. A put gains when the stock falls, a call when it rises, and a fund may hold either to hedge.Schedule 13D and 13G filed on the name, last twelve months
| Filed | Schedule | Who | Holding | Of the class | Event date | Rule or purpose | Filing |
|---|---|---|---|---|---|---|---|
| 14 May 2026 | 13G/A | Capital World Investors and 1 other | 10.9 million | 8.2% | 31 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 14 May 2026 | 13G/A | Capital Research Global Investors and 1 other | 9.5 million | 7.1% | 31 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 6 May 2026 | 13G/A | FMR LLC and 3 others | 14.6 million | 11.0% | 31 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 29 April 2026 | 13G | Vanguard Capital Management and 1 other | 7.1 million | 5.3% | 31 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 26 March 2026 | 13G/A | The Vanguard Group and 1 other | 0 | 0.0% | 13 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 5 November 2025 | 13G/A | FMR LLC and 3 others | 16.8 million | 12.8% | 30 September 2025 | passive, institutional (13d-1(b)) | EDGAR |
A Schedule 13D is filed by anyone who crosses 5% of a class with intent to influence; a 13G by a passive holder.
Read more
Amendments (/A) report a change, including an exit to zero. Holding and percentage are as the filer stated them on the cover page; the purpose is the filer's own words, cut short. 13D and 13GFails to deliver
| Settlement date | Shares failed | Price | File |
|---|---|---|---|
| 24 September 2026 | 1,112 | $246.51 | SEC |
| 23 September 2026 | 1,116 | $251.65 | SEC |
| 22 September 2026 | 1,379 | $244.32 | SEC |
| 21 September 2026 | 100 | $239.56 | SEC |
| 15 September 2026 | 159 | $249.99 | SEC |
| 26 August 2026 | 3 | $240.08 | SEC |
| 21 August 2026 | 297 | $229.30 | SEC |
| 20 August 2026 | 19,753 | $242.61 | SEC |
Shares that failed to deliver at settlement, per day, from the SEC's half-month files, which arrive about two weeks after the period.