Campbell & CO Investment Adviser LLC
Position in CSTL — Castle Biosciences Inc
CIK 1353570
BALTIMORE, MD
Position in CSTL
as of Jun 30, 2026
· filed Aug 3, 2026
Position Value
$392,952
-$3,260,677 QoQ
Shares Held
16,476
-88.9% QoQ
Ownership
0.054%
of shares outstanding
% of Portfolio
0.02%
of 13F equity value
Holder Rank
#90
of 176 holders
Holding Since
Jun 2024
7 quarters on record
Voting authority
Sole 0%
Shared 0%
None 100%
Common Shares in CSTL Over Time
Shares Held
Position Value (USD)
Position in Diagnostics & Research
Healthcare · as of Jun 30, 2026Campbell & CO Investment Adviser LLC holds $60,149,086 across 16 Diagnostics & Research names. CSTL ranks #13 (0.7% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | MTD |
Mettler Toledo International Inc/
|
7,752 | $9,903,257 | |
| 2 | LH |
Labcorp Holdings Inc.
|
34,593 | $9,686,040 | |
| 3 | IQV |
Iqvia Holdings Inc.
|
45,367 | $8,765,811 | |
| 4 | TMO |
Thermo Fisher Scientific Inc.
|
16,256 | $8,150,108 | |
| 5 | RVTY |
Revvity, Inc.
|
70,574 | $7,852,063 | |
| 6 | DGX |
Quest Diagnostics Inc
|
21,872 | $4,635,770 | |
| 7 | WAT |
Waters Corp /De/
|
9,486 | $3,557,629 | |
| 8 | IDXX |
Idexx Laboratories Inc /De
|
5,836 | $3,072,303 |
All Filings in CSTL
Export CSV
7 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $392,952 | 16,476 | Shares | Sole | 2026-08-03 | |
| 2026-03-31 | $3,653,629 | 148,824 | Shares | Sole | 2026-05-15 | |
| 2025-09-30 | $614,698 | 26,996 | Shares | Sole | 2025-10-28 | |
| 2025-03-31 | $917,896 | 45,849 | Shares | Sole | 2025-05-14 | |
| 2024-12-31 | $1,234,428 | 46,320 | Shares | Sole | 2025-02-10 | |
| 2024-09-30 | $1,137,634 | 39,889 | Shares | Sole | 2024-11-12 | |
| 2024-06-30 | $588,508 | 27,033 | Shares | Sole | 2024-08-13 | |
| No filing history on record for this holder in this stock. | ||||||