T. Rowe Price Investment Management, Inc.
Position in ALNY — Alnylam Pharmaceuticals, Inc.
CIK 1897612
BALTIMORE, MD
Position in ALNY
as of Jun 30, 2026
· filed Aug 14, 2026
Position Value
$1,698,463,338
-$19,851,773 QoQ
Shares Held
5,642,173
+8.6% QoQ
Ownership
4.22%
of shares outstanding
% of Portfolio
1.12%
of 13F equity value
Holder Rank
#7
of 784 holders
Holding Since
Sep 2022
16 quarters on record
Voting authority
Sole 96%
Shared 0%
None 4%
Common Shares in ALNY Over Time
Shares Held
Position Value (USD)
Position in Biotechnology
Healthcare · as of Jun 30, 2026T. Rowe Price Investment Management, Inc. holds $12,244,164,567 across 51 Biotechnology names. ALNY ranks #2 (13.9% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | ASND |
Ascendis Pharma A/S
|
6,754,846 | $1,801,652,525 | |
| 2 | ALNY |
Alnylam Pharmaceuticals, Inc.
This page
|
5,642,173 | $1,698,463,338 | |
| 3 | CYTK |
Cytokinetics Inc
|
18,718,498 | $1,594,628,844 | |
| 4 | KYMR |
Kymera Therapeutics, Inc.
|
6,257,261 | $717,520,118 | |
| 5 | PCVX |
Vaxcyte, Inc.
|
12,207,450 | $709,619,068 | |
| 6 | DYN |
Dyne Therapeutics, Inc.
|
30,912,287 | $686,561,894 | |
| 7 | CGON |
CG Oncology, Inc.
|
6,616,899 | $470,130,673 | |
| 8 | IMNM |
Immunome Inc.
|
19,676,883 | $416,953,150 |
All Filings in ALNY
Export CSV
16 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $1,698,463,338 | 5,642,173 | Shares | Sole | 2026-08-14 | |
| 2026-03-31 | $1,718,315,111 | 5,193,324 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $457,833,134 | 1,151,347 | Shares | Sole | 2026-02-17 | |
| 2025-09-30 | $991,336,704 | 2,173,984 | Shares | Sole | 2025-11-14 | |
| 2025-06-30 | $1,396,082,269 | 4,281,279 | Shares | Sole | 2025-08-14 | |
| 2025-03-31 | $1,192,987,512 | 4,418,145 | Shares | Sole | 2025-05-14 | |
| 2024-12-31 | $1,031,704,694 | 4,384,449 | Shares | Sole | 2025-02-14 | |
| 2024-09-30 | $863,389,027 | 3,139,254 | Shares | Sole | 2024-11-14 | |
| 2024-06-30 | $766,331,361 | 3,153,627 | Shares | Sole | 2024-08-14 | |
| 2024-03-31 | $429,355,502 | 2,872,904 | Shares | Sole | 2024-05-15 | |
| 2023-12-31 | $655,782,718 | 3,426,063 | Shares | Sole | 2024-02-14 | |
| 2023-09-30 | $601,937,928 | 3,398,859 | Shares | Sole | 2023-11-14 | |
| 2023-06-30 | $614,954,302 | 3,237,624 | Shares | Sole | 2023-08-14 | |
| 2023-03-31 | $607,134,062 | 3,030,821 | Shares | Sole | 2023-05-15 | |
| 2022-12-31 | $761,143,756 | 3,202,793 | Shares | Sole | 2023-02-14 | |
| 2022-09-30 | $638,947,549 | 3,192,184 | Shares | Sole | 2022-11-14 | |
| No filing history on record for this holder in this stock. | ||||||