CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM
PensionPosition in SION — Sionna Therapeutics, Inc.
CIK 1081019
WEST SACRAMENTO, CA
Position in SION
as of Mar 31, 2026
· filed May 18, 2026
Position Value
$34,798
-$5,848 QoQ
Shares Held
868
-12.1% QoQ
Ownership
0.002%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Jun 2025
4 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in SION Over Time
Shares Held
Position Value (USD)
Position in Biotechnology
Healthcare · as of Mar 31, 2026CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM holds $884,195,298 across 222 Biotechnology names. SION ranks #151 (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 SION
Export CSV
4 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $34,798 | 868 | Shares | Sole | 2026-05-18 | |
| 2025-12-31 | $40,646 | 988 | Shares | Sole | 2026-02-17 | |
| 2025-09-30 | $22,675 | 771 | Shares | Sole | 2025-11-14 | |
| 2025-06-30 | $13,359 | 770 | Shares | Sole | 2025-08-14 | |
| No filing history on record for this holder in this stock. | ||||||