CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM
PensionPosition in UPB — Upstream Bio, Inc.
CIK 1081019
WEST SACRAMENTO, CA
Position in UPB
as of Jun 30, 2026
· filed Aug 24, 2026
Position Value
$267,347
-$89,602 QoQ
Shares Held
38,634
-2.6% QoQ
Ownership
0.071%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#71
of 148 holders
Holding Since
Dec 2024
7 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in UPB 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. UPB ranks #149 (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 UPB
Export CSV
7 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $267,347 | 38,634 | Shares | Sole | 2026-08-24 | |
| 2026-03-31 | $356,949 | 39,661 | Shares | Sole | 2026-05-18 | |
| 2025-12-31 | $397,801 | 14,652 | Shares | Sole | 2026-02-17 | |
| 2025-09-30 | $40,930 | 2,176 | Shares | Sole | 2025-11-14 | |
| 2025-06-30 | $23,870 | 2,174 | Shares | Sole | 2025-08-14 | |
| 2025-03-31 | $7,894 | 1,290 | Shares | Sole | 2025-05-15 | |
| 2024-12-31 | $21,207 | 1,290 | Shares | Sole | 2025-03-18 | |
| No filing history on record for this holder in this stock. | ||||||