CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM
PensionPosition in KRRO — Korro Bio, Inc.
CIK 1081019
WEST SACRAMENTO, CA
Position in KRRO
as of Jun 30, 2026
· filed Aug 24, 2026
Position Value
$1,225
-$2,043 QoQ
Shares Held
93
-77.2% QoQ
Ownership
0.001%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2020
17 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in KRRO Over Time
Shares Held
Position Value (USD)
Position in Biotechnology
Healthcare · as of Jun 30, 2026CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM holds $1,007,510,813 across 262 Biotechnology names. KRRO ranks #257 (0.0% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | VRTX |
Vertex Pharmaceuticals Inc / Ma
|
383,491 | $190,491,484 | |
| 2 | REGN |
Regeneron Pharmaceuticals, Inc.
|
156,724 | $97,723,682 | |
| 3 | ALNY |
Alnylam Pharmaceuticals, Inc.
|
199,861 | $60,164,156 | |
| 4 | RVMD |
Revolution Medicines, Inc.
|
238,463 | $44,659,350 | |
| 5 | RPRX |
Royalty Pharma plc
|
699,205 | $39,204,424 | |
| 6 | INSM |
INSMED Inc
|
304,798 | $32,497,562 | |
| 7 | INCY |
Incyte Corp
|
249,988 | $28,338,639 | |
| 8 | MRNA |
Moderna, Inc.
|
395,278 | $27,681,318 |
All Filings in KRRO
Export CSV
8 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $1,225 | 93 | Shares | Sole | 2026-08-24 | |
| 2025-12-31 | $3,268 | 408 | Shares | Sole | 2026-02-17 | |
| 2025-09-30 | $19,922 | 416 | Shares | Sole | 2025-11-14 | |
| 2025-06-30 | $5,520 | 442 | Shares | Sole | 2025-08-14 | |
| 2025-03-31 | $7,695 | 442 | Shares | Sole | 2025-05-15 | |
| 2024-12-31 | $184,639 | 4,850 | Shares | Sole | 2025-03-18 | |
| 2024-09-30 | $14,771 | 442 | Shares | Sole | 2025-04-04 | |
| 2024-06-30 | $14,970 | 442 | Shares | Sole | 2025-04-08 | |
| No filing history on record for this holder in this stock. | ||||||