Position in CSTL
as of Jun 30, 2026
· filed Jul 24, 2026
Position Value
$384,939
+$6,501 QoQ
Shares Held
16,140
+4.7% QoQ
Ownership
0.053%
of shares outstanding
% of Portfolio
0.30%
of 13F equity value
Holder Rank
#6
of 27 holders
Holding Since
Mar 2020
25 quarters on record
Voting authority
Sole 92%
Shared 0%
None 8%
Common Shares in CSTL Over Time
Shares Held
Position Value (USD)
Position in Diagnostics & Research
Healthcare · as of Jun 30, 2026PERKINS CAPITAL MANAGEMENT INC holds $26,693,573 across 9 Diagnostics & Research names. CSTL ranks #8 (1.4% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | NTRA |
Natera, Inc.
|
40,605 | $11,022,227 | |
| 2 | IDXX |
Idexx Laboratories Inc /De
|
9,700 | $5,106,468 | |
| 3 | VCYT |
Veracyte, Inc.
|
59,958 | $3,521,333 | |
| 4 | PSNL |
Personalis, Inc.
|
239,000 | $3,202,600 | |
| 5 | NEO |
Neogenomics Inc
|
110,040 | $1,605,483 | |
| 6 | BDSX |
Biodesix Inc
|
44,618 | $1,006,135 | |
| 7 | MDXH |
MDxHealth SA
|
1,411,891 | $580,287 | |
| 8 | CSTL |
Castle Biosciences Inc
This page
|
16,140 | $384,939 |
All Filings in CSTL
Export CSV
25 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $384,939 | 16,140 | Shares | Sole | 2026-07-24 | |
| 2026-03-31 | $378,438 | 15,415 | Shares | Sole | 2026-04-23 | |
| 2025-12-31 | $1,090,950 | 28,045 | Shares | Sole | 2026-02-04 | |
| 2025-09-30 | $640,861 | 28,145 | Shares | Sole | 2025-10-31 | |
| 2025-06-30 | $571,657 | 27,995 | Shares | Sole | 2025-08-07 | |
| 2025-03-31 | $679,979 | 33,965 | Shares | Sole | 2025-05-07 | |
| 2024-12-31 | $910,497 | 34,165 | Shares | Sole | 2025-02-11 | |
| 2024-09-30 | $930,892 | 32,640 | Shares | Sole | 2024-10-31 | |
| 2024-06-30 | $676,829 | 31,090 | Shares | Sole | 2024-08-09 | |
| 2024-03-31 | $711,901 | 32,140 | Shares | Sole | 2024-05-09 | |
| 2023-12-31 | $693,581 | 32,140 | Shares | Sole | 2024-01-22 | |
| 2023-09-30 | $492,512 | 29,160 | Shares | Sole | 2023-11-02 | |
| 2023-06-30 | $419,626 | 30,585 | Shares | Sole | 2023-07-21 | |
| 2023-03-31 | $706,819 | 31,110 | Shares | Sole | 2023-05-09 | |
| 2022-12-31 | $732,329 | 31,110 | Shares | Sole | 2023-01-26 | |
| 2022-09-30 | $811,348 | 31,110 | Shares | Sole | 2022-10-24 | |
| 2022-06-30 | $728,081 | 33,170 | Shares | Sole | 2022-07-29 | |
| 2022-03-31 | $1,488,006 | 33,170 | Shares | Sole | 2022-04-20 | |
| 2021-12-31 | $1,421,997 | 33,170 | Shares | Sole | 2022-02-10 | |
| 2021-09-30 | $2,204,475 | 33,150 | Shares | Sole | 2021-10-25 | |
| 2021-06-30 | $2,430,889 | 33,150 | Shares | Sole | 2021-07-28 | |
| 2021-03-31 | $2,293,410 | 33,500 | Shares | Sole | 2021-04-28 | |
| 2020-12-31 | $2,316,675 | 34,500 | Shares | Sole | 2021-02-09 | |
| 2020-09-30 | $1,795,605 | 34,900 | Shares | Sole | 2020-10-28 | |
| 2020-03-31 | $1,009,068 | 33,850 | Shares | Sole | 2020-04-29 | |
| No filing history on record for this holder in this stock. | ||||||