STATE OF WISCONSIN INVESTMENT BOARD
Position in KROS — Keros Therapeutics, Inc.
CIK 854157
MADISON, WI
Position in KROS
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$175,889
-$227,951 QoQ
Shares Held
15,932
-19.7% QoQ
Ownership
0.080%
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 Jun 30, 2026STATE OF WISCONSIN INVESTMENT BOARD holds $511,704,326 across 163 Biotechnology names.
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | VRTX |
Vertex Pharmaceuticals Inc / Ma
|
135,798 | $67,454,940 | |
| 2 | REGN |
Regeneron Pharmaceuticals, Inc.
|
55,287 | $34,473,655 | |
| 3 | ALNY |
Alnylam Pharmaceuticals, Inc.
|
70,171 | $21,123,576 | |
| 4 | RVMD |
Revolution Medicines, Inc.
|
83,892 | $15,711,293 | |
| 5 | XENE |
Xenon Pharmaceuticals Inc.
|
248,821 | $15,018,835 | |
| 6 | MRNA |
Moderna, Inc.
|
207,705 | $14,545,581 | |
| 7 | INSM |
INSMED Inc
|
118,057 | $12,587,237 | |
| 8 | RPRX |
Royalty Pharma plc
|
213,373 | $11,963,824 |
All Filings in KROS
Export CSV
23 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $175,889 | 15,932 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $403,840 | 19,835 | Shares | Sole | 2026-02-17 | |
| 2025-09-30 | $351,583 | 22,224 | Shares | Sole | 2025-11-14 | |
| 2025-06-30 | $960,185 | 71,924 | Shares | Sole | 2025-08-14 | |
| 2024-12-31 | $703,390 | 44,434 | Shares | Sole | 2025-02-14 | |
| 2024-09-30 | $1,609,700 | 27,720 | Shares | Sole | 2024-11-14 | |
| 2024-06-30 | $1,451,340 | 31,758 | Shares | Sole | 2024-08-14 | |
| 2024-03-31 | $1,253,232 | 18,931 | Shares | Sole | 2024-05-14 | |
| 2023-12-31 | $1,148,706 | 28,891 | Shares | Sole | 2024-02-12 | |
| 2023-09-30 | $851,451 | 26,708 | Shares | Sole | 2023-11-14 | |
| 2023-06-30 | $592,012 | 14,734 | Shares | Sole | 2023-08-14 | |
| 2023-03-31 | $765,995 | 17,939 | Shares | Sole | 2023-05-15 | |
| 2022-12-31 | $740,804 | 15,427 | Shares | Sole | 2023-02-14 | |
| 2022-09-30 | $541,351 | 14,390 | Shares | Sole | 2022-11-14 | |
| 2022-06-30 | $386,433 | 13,986 | Shares | Sole | 2022-08-15 | |
| 2022-03-31 | $973,402 | 17,900 | Shares | Sole | 2022-05-13 | |
| 2021-12-31 | $1,047,329 | 17,900 | Shares | Sole | 2022-02-11 | |
| 2021-09-30 | $708,124 | 17,900 | Shares | Sole | 2021-11-12 | |
| 2021-06-30 | $760,213 | 17,900 | Shares | Sole | 2021-08-12 | |
| 2021-03-31 | $1,101,745 | 17,900 | Shares | Sole | 2021-05-17 | |
| 2020-12-31 | $1,276,774 | 18,100 | Shares | Sole | 2021-02-03 | |
| 2020-09-30 | $431,984 | 11,200 | Shares | Sole | 2020-11-16 | |
| 2020-06-30 | $420,112 | 11,200 | Shares | Sole | 2020-08-12 | |
| No filing history on record for this holder in this stock. | ||||||