T. Rowe Price Investment Management, Inc.
Position in ALNY — Alnylam Pharmaceuticals, Inc.
CIK 1897612
BALTIMORE, MD
Position in ALNY
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$1,718,315,111
+$1,020,980,165 QoQ
Shares Held
5,193,324
+196.1% QoQ
Ownership
3.92%
of shares outstanding
% of Portfolio
1.20%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Sep 2022
15 quarters on record
Voting authority
Sole 96.42175223421454.ToString("F0")%
Shared 0.ToString("F0")%
None 3.5782477657854583.ToString("F0")%
Common Shares in ALNY Over Time
Shares Held
Position Value (USD)
Position in Biotechnology
Healthcare · as of Mar 31, 2026T. Rowe Price Investment Management, Inc. holds $11,176,949,825 across 48 Biotechnology names. ALNY ranks #1 (15.4% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | ALNY |
Alnylam Pharmaceuticals, Inc.
This page
|
5,193,324 | $1,718,315,111 | |
| 2 | ASND |
Ascendis Pharma A/S
|
6,162,042 | $1,409,443,866 | |
| 3 | CYTK |
Cytokinetics Inc
|
17,523,840 | $1,154,996,294 | |
| 4 | APGE |
Apogee Therapeutics, Inc.
|
10,300,984 | $867,033,823 | |
| 5 | PCVX |
Vaxcyte, Inc.
|
12,126,017 | $704,642,847 | |
| 6 | DYN |
Dyne Therapeutics, Inc.
|
30,785,801 | $558,146,572 | |
| 7 | BNTX |
BioNTech SE
|
5,856,073 | $520,487,768 | |
| 8 | IONS |
Ionis Pharmaceuticals Inc
|
6,159,027 | $462,481,337 |
All Filings in ALNY
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15 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $1,718,315,111 | 5,193,324 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $697,334,946 | 1,753,640 | Shares | Sole | 2026-02-19 | |
| 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. | ||||||