CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM
PensionPosition in IRON — Disc Medicine, Inc.
CIK 1081019
WEST SACRAMENTO, CA
Position in IRON
as of Jun 30, 2026
· filed Aug 24, 2026
Position Value
$2,878,790
+$680,405 QoQ
Shares Held
39,360
+14.5% QoQ
Ownership
0.103%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#80
of 216 holders
Holding Since
Jun 2021
17 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in IRON Over Time
Shares Held
Position Value (USD)
Position in Biotechnology
Healthcare · as of Jun 30, 2026CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM holds $999,742,756 across 262 Biotechnology names. IRON ranks #63 (0.3% 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 IRON
Export CSV
17 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $2,878,790 | 39,360 | Shares | Sole | 2026-08-24 | |
| 2026-03-31 | $2,198,385 | 34,382 | Shares | Sole | 2026-05-18 | |
| 2025-12-31 | $1,846,758 | 23,256 | Shares | Sole | 2026-02-17 | |
| 2025-09-30 | $1,459,905 | 22,093 | Shares | Sole | 2025-11-14 | |
| 2025-06-30 | $1,072,440 | 20,250 | Shares | Sole | 2025-08-14 | |
| 2025-03-31 | $1,000,345 | 20,152 | Shares | Sole | 2025-05-15 | |
| 2024-12-31 | $984,665 | 15,531 | Shares | Sole | 2025-03-18 | |
| 2024-09-30 | $833,758 | 16,967 | Shares | Sole | 2025-04-04 | |
| 2024-06-30 | $718,776 | 15,948 | Shares | Sole | 2025-04-08 | |
| 2024-03-31 | $734,668 | 11,800 | Shares | Sole | 2024-05-16 | |
| 2023-12-31 | $496,736 | 8,600 | Shares | Sole | 2024-02-13 | |
| 2023-09-30 | $420,940 | 8,960 | Shares | Sole | 2023-11-14 | |
| 2023-06-30 | $114,241 | 2,573 | Shares | Sole | 2023-08-21 | |
| 2022-03-31 GMTX | — | 9,679 | Shares | Sole | 2022-05-16 | |
| 2021-12-31 GMTX | — | 10,880 | Shares | Sole | 2022-02-15 | |
| 2021-09-30 GMTX | — | 14,439 | Shares | Sole | 2021-11-15 | |
| 2021-06-30 GMTX | — | 30,248 | Shares | Sole | 2021-08-16 | |
| No filing history on record for this holder in this stock. | ||||||