CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM
PensionPosition in KROS — Keros Therapeutics, Inc.
CIK 1081019
WEST SACRAMENTO, CA
Position in KROS
as of Mar 31, 2026
· filed May 18, 2026
Position Value
$17,454
-$19,173 QoQ
Shares Held
1,581
-12.1% QoQ
Ownership
0.008%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Jun 2020
23 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in KROS Over Time
Shares Held
Position Value (USD)
Position in Biotechnology
Healthcare · as of Mar 31, 2026CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM holds $855,427,423 across 222 Biotechnology names. KROS ranks #169 (0.0% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | VRTX |
Vertex Pharmaceuticals Inc / Ma
|
373,481 | $166,774,205 | |
| 2 | REGN |
Regeneron Pharmaceuticals, Inc.
|
154,201 | $119,141,860 | |
| 3 | ALNY |
Alnylam Pharmaceuticals, Inc.
|
196,863 | $65,136,060 | |
| 4 | INSM |
INSMED Inc
|
303,182 | $49,576,320 | |
| 5 | RPRX |
Royalty Pharma plc
|
759,042 | $36,411,244 | |
| 6 | INCY |
Incyte Corp
|
241,287 | $22,709,932 | |
| 7 | MRNA |
Moderna, Inc.
|
407,190 | $20,685,252 | |
| 8 | RVMD |
Revolution Medicines, Inc.
|
165,277 | $16,073,188 |
All Filings in KROS
Export CSV
23 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $17,454 | 1,581 | Shares | Sole | 2026-05-18 | |
| 2025-12-31 | $36,627 | 1,799 | Shares | Sole | 2026-02-17 | |
| 2025-09-30 | $33,222 | 2,100 | Shares | Sole | 2025-11-14 | |
| 2025-03-31 | $22,927 | 2,250 | Shares | Sole | 2025-05-15 | |
| 2024-12-31 | $445,155 | 28,121 | Shares | Sole | 2025-03-18 | |
| 2024-09-30 | $1,588,446 | 27,354 | Shares | Sole | 2025-04-04 | |
| 2024-06-30 | $1,291,116 | 28,252 | Shares | Sole | 2025-04-08 | |
| 2024-03-31 | $1,675,786 | 25,314 | Shares | Sole | 2024-05-16 | |
| 2023-12-31 | $882,791 | 22,203 | Shares | Sole | 2024-02-13 | |
| 2023-09-30 | $741,751 | 23,267 | Shares | Sole | 2023-11-14 | |
| 2023-06-30 | $1,006,910 | 25,060 | Shares | Sole | 2023-08-21 | |
| 2023-03-31 | $925,394 | 21,672 | Shares | Sole | 2023-05-09 | |
| 2022-12-31 | $1,013,510 | 21,106 | Shares | Sole | 2023-02-14 | |
| 2022-09-30 | $734,003 | 19,511 | Shares | Sole | 2022-11-21 | |
| 2022-06-30 | $529,031 | 19,147 | Shares | Sole | 2022-08-15 | |
| 2022-03-31 | $960,894 | 17,670 | Shares | Sole | 2022-05-16 | |
| 2021-12-31 | $1,130,237 | 19,317 | Shares | Sole | 2022-02-15 | |
| 2021-09-30 | $747,486 | 18,895 | Shares | Sole | 2021-11-15 | |
| 2021-06-30 | $913,911 | 21,519 | Shares | Sole | 2021-08-16 | |
| 2021-03-31 | $1,226,753 | 19,931 | Shares | Sole | 2021-05-18 | |
| 2020-12-31 | $1,391,330 | 19,724 | Shares | Sole | 2021-02-16 | |
| 2020-09-30 | $405,100 | 10,503 | Shares | Sole | 2020-11-17 | |
| 2020-06-30 | $393,967 | 10,503 | Shares | Sole | 2020-08-17 | |
| No filing history on record for this holder in this stock. | ||||||