ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
Position in CSTL — Castle Biosciences Inc
CIK 1164508
BOSTON, MA
Position in CSTL
as of Mar 31, 2026
· filed May 14, 2026
Position Value
$666,336
+$392,908 QoQ
Shares Held
27,142
+286.1% QoQ
Ownership
0.089%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Dec 2024
3 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, 2026ARROWSTREET CAPITAL, LIMITED PARTNERSHIP holds $2,654,302,721 across 18 Diagnostics & Research names. CSTL ranks #18 (0.0% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | DHR |
Danaher Corp /De/
|
3,639,630 | $690,073,848 | |
| 2 | IDXX |
Idexx Laboratories Inc /De
|
838,839 | $471,335,245 | |
| 3 | TMO |
Thermo Fisher Scientific Inc.
|
634,369 | $311,811,394 | |
| 4 | NTRA |
Natera, Inc.
|
1,191,732 | $238,334,482 | |
| 5 | MEDP |
Medpace Holdings, Inc.
|
395,769 | $190,044,316 | |
| 6 | MTD |
Mettler Toledo International Inc/
|
134,906 | $170,143,447 | |
| 7 | IQV |
Iqvia Holdings Inc.
|
992,190 | $169,208,082 | |
| 8 | A |
Agilent Technologies, Inc.
|
1,439,782 | $164,106,352 |
All Filings in CSTL
Export CSV
3 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $666,336 | 27,142 | Shares | Defined | 2026-05-14 | |
| 2025-12-31 | $273,428 | 7,029 | Shares | Defined | 2026-02-13 | |
| 2024-12-31 | $770,264 | 28,903 | Shares | Defined | 2025-02-12 | |
| No filing history on record for this holder in this stock. | ||||||