Position in CSTL
as of Jun 30, 2026
· filed Aug 14, 2026
Position Value
$309,668
-$7,027 QoQ
Shares Held
12,984
+0.7% QoQ
Ownership
0.043%
of shares outstanding
% of Portfolio
0.15%
of 13F equity value
Holder Rank
#104
of 176 holders
Holding Since
Dec 2023
11 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, 2026Birchview Capital, LP holds $6,777,098 across 2 Diagnostics & Research names. CSTL ranks #2 (4.6% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | BDSX |
Biodesix Inc
|
286,804 | $6,467,430 | |
| 2 | CSTL |
Castle Biosciences Inc
This page
|
12,984 | $309,668 |
All Filings in CSTL
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11 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $309,668 | 12,984 | Shares | Sole | 2026-08-14 | |
| 2026-03-31 | $316,695 | 12,900 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $3,135,340 | 80,600 | Shares | Sole | 2026-02-13 | |
| 2025-09-30 | $2,518,362 | 110,600 | Shares | Sole | 2025-11-13 | |
| 2025-06-30 | $2,258,452 | 110,600 | Shares | Sole | 2025-08-14 | |
| 2025-03-31 | $1,769,848 | 88,404 | Shares | Sole | 2025-05-15 | |
| 2024-12-31 | $2,078,700 | 78,000 | Shares | Sole | 2025-06-30 | |
| 2024-09-30 | $1,654,160 | 58,000 | Shares | Sole | 2025-06-30 | |
| 2024-06-30 | $740,180 | 34,000 | Shares | Sole | 2025-06-30 | |
| 2024-03-31 | $310,100 | 14,000 | Shares | Sole | 2025-06-30 | |
| 2023-12-31 | $215,800 | 10,000 | Shares | Sole | 2025-06-30 | |
| No filing history on record for this holder in this stock. | ||||||