ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
Position in CSTL — Castle Biosciences Inc
CIK 1164508
BOSTON, MA
Position in CSTL
as of Jun 30, 2026
· filed Aug 13, 2026
Position Value
$2,211,753
+$1,545,417 QoQ
Shares Held
92,736
+241.7% QoQ
Ownership
0.304%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#50
of 176 holders
Holding Since
Dec 2024
4 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 Jun 30, 2026ARROWSTREET CAPITAL, LIMITED PARTNERSHIP holds $3,756,493,842 across 20 Diagnostics & Research names. CSTL ranks #19 (0.1% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | DHR |
Danaher Corp /De/
|
5,163,059 | $983,459,478 | |
| 2 | IDXX |
Idexx Laboratories Inc /De
|
1,067,078 | $561,752,542 | |
| 3 | TMO |
Thermo Fisher Scientific Inc.
|
1,007,394 | $505,067,055 | |
| 4 | NTRA |
Natera, Inc.
|
1,503,706 | $408,180,993 | |
| 5 | A |
Agilent Technologies, Inc.
|
1,844,954 | $245,065,239 | |
| 6 | IQV |
Iqvia Holdings Inc.
|
1,250,053 | $241,535,240 | |
| 7 | MEDP |
Medpace Holdings, Inc.
|
429,012 | $227,200,465 | |
| 8 | MTD |
Mettler Toledo International Inc/
|
167,741 | $214,290,804 |
All Filings in CSTL
Export CSV
4 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $2,211,753 | 92,736 | Shares | Defined | 2026-08-13 | |
| 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. | ||||||