price
CS
NASDAQ · CSTL
Castle Biosciences, Inc.
Healthcare · Medical - Diagnostics & Research
$34.20
Up+$1.27 (+3.86%)
Updated Aug 22, 2026, 6:28 PM
SID Score
5.5/10
Composite research score
Smart Money
—
Institutional and insider signal
- Market cap
- 1.11B
- P/E ratio
- -115.98
- Dividend yield
- 0.00%
- 52-week range
- $17.72 – $34.70
- Volume
- 573.47K
- Avg. volume
- 400.7K
Price performance
CSTL price history
1M range · 21 trading sessions · Daily adjusted prices
CSTL closed at $34.20 after 21 trading sessions, up 38.55% for the selected period.
- Last close
- $34.20
- Period change
- +38.55%
- Period low
- $23.89
- Period high
- $34.20
Daily close
View OHLC price history
| Date | Open | High | Low | Close | Volume |
|---|---|---|---|---|---|
| Aug 21, 2026 | $32.85 | $34.70 | $32.14 | $34.20 | 573.47K |
| Aug 20, 2026 | $32.41 | $34.01 | $32.41 | $32.93 | 322.94K |
| Aug 19, 2026 | $29.03 | $32.39 | $29.03 | $32.32 | 451.92K |
| Aug 18, 2026 | $29.89 | $30.125 | $28.72 | $29.03 | 596.61K |
| Aug 17, 2026 | $29.50 | $30.50 | $29.21 | $29.95 | 225.81K |
| Aug 14, 2026 | $30.93 | $31.115 | $29.58 | $29.62 | 264.21K |
| Aug 13, 2026 | $31.62 | $31.97 | $30.51 | $30.55 | 362.23K |
| Aug 12, 2026 | $32.43 | $33.00 | $31.25 | $31.43 | 436K |
| Aug 11, 2026 | $32.34 | $32.99 | $31.4642 | $32.24 | 313.47K |
| Aug 10, 2026 | $31.86 | $33.06 | $31.24 | $32.35 | 400.77K |
| Aug 7, 2026 | $30.88 | $32.365 | $30.6501 | $32.03 | 241.82K |
| Aug 6, 2026 | $30.20 | $30.75 | $29.50 | $30.47 | 833.43K |
| Aug 5, 2026 | $31.18 | $31.42 | $30.10 | $30.40 | 520.2K |
| Aug 4, 2026 | $30.18 | $31.73 | $29.99 | $31.18 | 675.3K |
| Aug 3, 2026 | $27.83 | $30.725 | $27.83 | $30.39 | 777.61K |
| Jul 31, 2026 | $28.75 | $30.81 | $27.50 | $28.00 | 1.76M |
| Jul 30, 2026 | $24.50 | $27.13 | $24.50 | $26.79 | 716.33K |
| Jul 29, 2026 | $23.93 | $25.30 | $23.73 | $24.46 | 340.08K |
| Jul 28, 2026 | $24.63 | $24.77 | $23.76 | $23.89 | 366.21K |
| Jul 27, 2026 | $25.10 | $25.115 | $23.85 | $24.44 | 291.64K |
| Jul 24, 2026 | $25.56 | $25.625 | $24.35 | $24.685 | 408.99K |
Latest CSTL news
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