CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM
PensionPosition in CSTL — Castle Biosciences Inc
CIK 1081019
WEST SACRAMENTO, CA
Position in CSTL
as of Mar 31, 2026
· filed May 18, 2026
Position Value
$675,444
-$403,058 QoQ
Shares Held
27,513
-0.8% QoQ
Ownership
0.091%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2020
25 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in CSTL Over Time
Shares Held
Position Value (USD)
Position in Diagnostics & Research
Healthcare · as of Mar 31, 2026CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM holds $915,093,488 across 29 Diagnostics & Research names. CSTL ranks #24 (0.1% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | TMO |
Thermo Fisher Scientific Inc.
|
571,811 | $281,062,260 | |
| 2 | DHR |
Danaher Corp /De/
|
973,686 | $184,610,865 | |
| 3 | IDXX |
Idexx Laboratories Inc /De
|
122,654 | $68,918,056 | |
| 4 | A |
Agilent Technologies, Inc.
|
438,607 | $49,992,425 | |
| 5 | WAT |
Waters Corp /De/
|
154,059 | $45,878,770 | |
| 6 | IQV |
Iqvia Holdings Inc.
|
261,431 | $44,584,442 | |
| 7 | NTRA |
Natera, Inc.
|
197,815 | $39,561,021 | |
| 8 | MTD |
Mettler Toledo International Inc/
|
30,547 | $38,525,876 |
All Filings in CSTL
Export CSV
25 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $675,444 | 27,513 | Shares | Sole | 2026-05-18 | |
| 2025-12-31 | $1,078,502 | 27,725 | Shares | Sole | 2026-02-17 | |
| 2025-09-30 | $560,642 | 24,622 | Shares | Sole | 2025-11-14 | |
| 2025-06-30 | $502,740 | 24,620 | Shares | Sole | 2025-08-14 | |
| 2025-03-31 | $492,892 | 24,620 | Shares | Sole | 2025-05-15 | |
| 2024-12-31 | $656,123 | 24,620 | Shares | Sole | 2025-03-18 | |
| 2024-09-30 | $706,468 | 24,771 | Shares | Sole | 2025-04-04 | |
| 2024-06-30 | $553,567 | 25,428 | Shares | Sole | 2024-08-14 | |
| 2024-03-31 | $564,470 | 25,484 | Shares | Sole | 2024-05-16 | |
| 2023-12-31 | $577,610 | 26,766 | Shares | Sole | 2024-02-13 | |
| 2023-09-30 | $470,859 | 27,878 | Shares | Sole | 2023-11-14 | |
| 2023-06-30 | $419,351 | 30,565 | Shares | Sole | 2023-08-21 | |
| 2023-03-31 | $654,336 | 28,800 | Shares | Sole | 2023-05-09 | |
| 2022-12-31 | $687,862 | 29,221 | Shares | Sole | 2023-02-14 | |
| 2022-09-30 | $753,659 | 28,898 | Shares | Sole | 2022-11-21 | |
| 2022-06-30 | $637,823 | 29,058 | Shares | Sole | 2022-08-15 | |
| 2022-03-31 | $1,176,094 | 26,217 | Shares | Sole | 2022-05-16 | |
| 2021-12-31 | $1,225,824 | 28,594 | Shares | Sole | 2022-02-15 | |
| 2021-09-30 | $1,855,749 | 27,906 | Shares | Sole | 2021-11-15 | |
| 2021-06-30 | $2,153,995 | 29,374 | Shares | Sole | 2021-08-16 | |
| 2021-03-31 | $1,504,203 | 21,972 | Shares | Sole | 2021-05-18 | |
| 2020-12-31 | $1,201,917 | 17,899 | Shares | Sole | 2021-02-16 | |
| 2020-09-30 | $913,237 | 17,750 | Shares | Sole | 2020-11-17 | |
| 2020-06-30 | $582,574 | 15,457 | Shares | Sole | 2020-08-17 | |
| 2020-03-31 | $429,383 | 14,404 | Shares | Sole | 2020-05-13 | |
| No filing history on record for this holder in this stock. | ||||||