Position in CSTL
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$5,474,208
-$1,029,016 QoQ
Shares Held
222,982
+33.4% QoQ
Ownership
0.735%
of shares outstanding
% of Portfolio
0.03%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2021
12 quarters on record
Voting authority
Sole 50%
Shared 50%
None 0%
Common Shares in CSTL Over Time
Shares Held
Position Value (USD)
Position in Diagnostics & Research
Healthcare · as of Mar 31, 2026TUDOR INVESTMENT CORP ET AL holds $188,228,065 across 21 Diagnostics & Research names. CSTL ranks #7 (2.9% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | DHR |
Danaher Corp /De/
|
447,231 | $84,794,997 | |
| 2 | NTRA |
Natera, Inc.
|
150,693 | $30,137,093 | |
| 3 | A |
Agilent Technologies, Inc.
|
159,699 | $18,202,492 | |
| 4 | SHC |
Sotera Health Co
|
845,120 | $12,119,020 | |
| 5 | ICLR |
Icon PLC
|
65,375 | $7,234,397 | |
| 6 | TMO |
Thermo Fisher Scientific Inc.
|
13,534 | $6,652,367 | |
| 7 | CSTL |
Castle Biosciences Inc
This page
|
222,982 | $5,474,208 | |
| 8 | IDXX |
Idexx Laboratories Inc /De
|
8,342 | $4,687,286 |
All Filings in CSTL
Export CSV
12 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $5,474,208 | 222,982 | Shares | Defined | 2026-05-15 | |
| 2025-12-31 | $6,503,224 | 167,178 | Shares | Defined | 2026-02-17 | |
| 2025-09-30 | $1,945,354 | 85,435 | Shares | Defined | 2025-11-14 | |
| 2025-06-30 | $1,561,190 | 76,454 | Shares | Defined | 2025-08-14 | |
| 2025-03-31 | $3,431,067 | 171,382 | Shares | Defined | 2025-05-15 | |
| 2024-12-31 | $1,867,525 | 70,076 | Shares | Defined | 2025-02-14 | |
| 2024-09-30 | $1,411,454 | 49,490 | Shares | Defined | 2024-11-14 | |
| 2024-06-30 | $738,830 | 33,938 | Shares | Defined | 2024-08-14 | |
| 2024-03-31 | $287,883 | 12,997 | Shares | Defined | 2024-05-15 | |
| 2022-12-31 | $1,386,576 | 58,903 | Shares | Defined | 2023-02-14 | |
| 2022-09-30 | $371,327 | 14,238 | Shares | Defined | 2022-11-14 | |
| 2021-03-31 | $212,294 | 3,101 | Shares | Defined | 2021-05-17 | |
| No filing history on record for this holder in this stock. | ||||||