Position in RYTM
as of Mar 31, 2026
· filed May 11, 2026
Position Value
$297,220,757
-$75,135,972 QoQ
Shares Held
3,417,509
-1.8% QoQ
Ownership
4.99%
of shares outstanding
% of Portfolio
0.24%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2020
25 quarters on record
Voting authority
Sole 100.ToString("F0")%
Shared 0.ToString("F0")%
None 0.ToString("F0")%
Common Shares in RYTM Over Time
Shares Held
Position Value (USD)
Position in Biotechnology
Healthcare · as of Mar 31, 2026PRIMECAP MANAGEMENT CO/CA/ holds $3,436,828,710 across 16 Biotechnology names. RYTM ranks #4 (8.6% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | ONC |
BeOne Medicines Ltd.
|
4,975,181 | $1,477,479,501 | |
| 2 | BMRN |
Biomarin Pharmaceutical Inc
|
14,194,005 | $801,819,342 | |
| 3 | BNTX |
BioNTech SE
|
3,793,711 | $337,185,033 | |
| 4 | RYTM |
Rhythm Pharmaceuticals, Inc.
This page
|
3,417,509 | $297,220,757 | |
| 5 | XNCR |
Xencor Inc
|
10,338,022 | $124,676,545 | |
| 6 | IMCR |
Immunocore Holdings plc
|
3,693,241 | $111,351,216 | |
| 7 | IMNM |
Immunome Inc.
|
4,788,231 | $104,718,611 | |
| 8 | BBIO |
BridgeBio Pharma, Inc.
|
569,180 | $42,267,306 |
All Filings in RYTM
Export CSV
26 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $297,220,757 | 3,417,509 | Shares | Sole | 2026-05-11 | |
| 2025-12-31 | $372,356,729 | 3,478,669 | Shares | Sole | 2026-02-11 | |
| 2025-12-31 | $372,356,729 | 3,478,669 | Shares | Sole | 2026-02-12 | |
| 2025-09-30 | $430,506,130 | 4,262,859 | Shares | Sole | 2025-11-12 | |
| 2025-06-30 | $308,243,158 | 4,878,037 | Shares | Sole | 2025-08-11 | |
| 2025-03-31 | $306,554,446 | 5,787,322 | Shares | Sole | 2025-05-09 | |
| 2024-12-31 | $367,855,216 | 6,571,190 | Shares | Sole | 2025-02-10 | |
| 2024-09-30 | $378,093,967 | 7,216,911 | Shares | Sole | 2024-11-08 | |
| 2024-06-30 | $300,246,774 | 7,312,391 | Shares | Sole | 2024-08-09 | |
| 2024-03-31 | $335,703,118 | 7,747,591 | Shares | Sole | 2024-05-14 | |
| 2023-12-31 | $370,180,228 | 8,052,648 | Shares | Sole | 2024-02-09 | |
| 2023-09-30 | $189,530,626 | 8,267,421 | Shares | Sole | 2023-11-13 | |
| 2023-06-30 | $136,855,737 | 8,299,317 | Shares | Sole | 2023-08-11 | |
| 2023-03-31 | $135,714,428 | 7,607,311 | Shares | Sole | 2023-05-15 | |
| 2022-12-31 | $201,252,455 | 6,911,142 | Shares | Sole | 2023-02-13 | |
| 2022-09-30 | $172,158,854 | 7,026,892 | Shares | Sole | 2022-11-14 | |
| 2022-06-30 | $26,410,990 | 6,364,094 | Shares | Sole | 2022-08-11 | |
| 2022-03-31 | $72,483,736 | 6,291,991 | Shares | Sole | 2022-05-11 | |
| 2021-12-31 | $62,444,770 | 6,256,991 | Shares | Sole | 2022-02-11 | |
| 2021-09-30 | $80,725,048 | 6,181,091 | Shares | Sole | 2021-11-12 | |
| 2021-06-30 | $120,489,269 | 6,153,691 | Shares | Sole | 2021-08-10 | |
| 2021-03-31 | $127,738,963 | 6,005,593 | Shares | Sole | 2021-05-14 | |
| 2020-12-31 | $129,102,257 | 4,342,491 | Shares | Sole | 2021-02-08 | |
| 2020-09-30 | $77,463,553 | 3,574,691 | Shares | Sole | 2020-11-13 | |
| 2020-06-30 | $79,048,839 | 3,544,791 | Shares | Sole | 2020-08-13 | |
| 2020-03-31 | $53,918,235 | 3,542,591 | Shares | Sole | 2020-05-14 | |
| No filing history on record for this holder in this stock. | ||||||