Capital World Investors
Position in ALNY — Alnylam Pharmaceuticals, Inc.
CIK 1422849
LOS ANGELES, CA
Position in ALNY
as of Jun 30, 2026
· filed Aug 12, 2026
Position Value
$3,354,932,991
-$219,239,891 QoQ
Shares Held
11,144,846
+3.2% QoQ
Ownership
8.33%
of shares outstanding
% of Portfolio
0.40%
of 13F equity value
Holder Rank
#2
of 784 holders
Holding Since
Mar 2020
26 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in ALNY Over Time
Shares Held
Position Value (USD)
Position in Biotechnology
Healthcare · as of Jun 30, 2026Capital World Investors holds $27,435,334,973 across 33 Biotechnology names. ALNY ranks #2 (12.2% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | VRTX |
Vertex Pharmaceuticals Inc / Ma
|
26,115,014 | $12,972,110,904 | |
| 2 | ALNY |
Alnylam Pharmaceuticals, Inc.
This page
|
11,144,846 | $3,354,932,991 | |
| 3 | ARGX |
Argenx SE
|
2,199,770 | $2,040,880,612 | |
| 4 | IONS |
Ionis Pharmaceuticals Inc
|
21,669,226 | $1,718,152,929 | |
| 5 | MRNA |
Moderna, Inc.
|
22,276,996 | $1,560,058,029 | |
| 6 | RVMD |
Revolution Medicines, Inc.
|
4,008,244 | $750,663,936 | |
| 7 | JAZZ |
Jazz Pharmaceuticals plc
|
2,697,610 | $650,043,081 | |
| 8 | ONC |
BeOne Medicines Ltd.
|
2,249,582 | $641,063,382 |
All Filings in ALNY
Export CSV
26 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $3,354,932,991 | 11,144,846 | Shares | Defined | 2026-08-12 | |
| 2026-03-31 | $3,574,172,882 | 10,802,348 | Shares | Defined | 2026-05-13 | |
| 2025-12-31 | $6,482,399,635 | 16,301,772 | Shares | Defined | 2026-02-11 | |
| 2025-09-30 | $7,494,019,368 | 16,434,253 | Shares | Defined | 2025-11-13 | |
| 2025-06-30 | $5,479,944,732 | 16,805,007 | Shares | Defined | 2025-08-13 | |
| 2025-03-31 | $4,522,733,202 | 16,749,623 | Shares | Defined | 2025-05-12 | |
| 2024-12-31 | $3,906,269,537 | 16,600,525 | Shares | Defined | 2025-02-13 | |
| 2024-09-30 | $4,540,311,852 | 16,508,424 | Shares | Defined | 2024-11-13 | |
| 2024-06-30 | $3,638,036,349 | 14,971,343 | Shares | Defined | 2024-08-13 | |
| 2024-03-31 | $1,911,351,320 | 12,789,236 | Shares | Defined | 2024-05-14 | |
| 2023-12-31 | $3,095,973,103 | 16,174,563 | Shares | Defined | 2024-02-13 | |
| 2023-09-30 | $2,927,340,446 | 16,529,308 | Shares | Defined | 2023-11-13 | |
| 2023-06-30 | $3,133,544,836 | 16,497,551 | Shares | Defined | 2023-08-11 | |
| 2023-03-31 | $3,300,512,584 | 16,476,201 | Shares | Defined | 2023-05-15 | |
| 2022-12-31 | $3,895,148,853 | 16,390,275 | Shares | Defined | 2023-02-14 | |
| 2022-09-30 | $2,792,161,343 | 13,949,647 | Shares | Defined | 2022-11-14 | |
| 2022-06-30 | $1,500,944,100 | 10,291,012 | Shares | Defined | 2022-08-15 | |
| 2022-03-31 | $979,686,767 | 5,999,674 | Shares | Defined | 2022-05-19 | |
| 2021-12-31 | $54,086,862 | 318,946 | Shares | Defined | 2022-02-14 | |
| 2021-09-30 | $60,220,194 | 318,946 | Shares | Defined | 2021-11-15 | |
| 2021-06-30 | $54,067,725 | 318,946 | Shares | Defined | 2021-08-16 | |
| 2021-03-31 | $49,775,969 | 352,546 | Shares | Defined | 2021-05-14 | |
| 2020-12-31 | $45,820,403 | 352,546 | Shares | Defined | 2021-02-12 | |
| 2020-09-30 | $51,330,697 | 352,546 | Shares | Defined | 2020-11-13 | |
| 2020-06-30 | $52,215,588 | 352,546 | Shares | Defined | 2020-08-14 | |
| 2020-03-31 | $38,374,632 | 352,546 | Shares | Defined | 2020-05-15 | |
| No filing history on record for this holder in this stock. | ||||||