CSTL
NASDAQ
US
Castle Biosciences, Inc. - Common stock
$24.84
▼ $-0.21
(-0.84%)
Vol 288K
7
Quality Score
fail
Rev ✗
NI ✗
>IPO ✗
Mkt Cap
$1.1B
ROE
-2.7%
Margin
-3.6%
D/E
2.22
Beta
1.09
52W
$15–$42
Wall Street Consensus
14 analysts · Apr 20267
Strong Buy
6
Buy
1
Hold
0
Sell
0
Strong Sell
92.9%
Buy Rating
Price Chart
Similar Stocks
Earnings
Beat rate: 75.0%| Quarter | EPS Est | EPS Act | Surprise |
|---|---|---|---|
| Dec 2025 | $-0.29 | $-0.08 | +$0.21 |
| Sep 2025 | $-0.53 | $-0.02 | +$0.51 |
| Jun 2025 | $-0.53 | $0.15 | +$0.68 |
| Mar 2025 | $-0.07 | $-0.20 | $-0.13 |
Quarterly Revenue & Earnings
| Quarter | 2024-0… | 2024-1… | 2025-0… | 2025-0… | 2025-0… | 2025-1… |
|---|---|---|---|---|---|---|
| Revenue | — | $86.3M | $88.0M | $86.2M | $83.0M | $87.0M |
| Net Income | — | $9.6M | -$25.8M | $4.5M | -$501K | -$2.3M |
Fundamentals Trend
| Metric | 2025-06-30 | 2025-09-02 | 2025-10-02 | 2025-11-03 | 2025-12-03 | 2026-01-02 |
|---|---|---|---|---|---|---|
| ROE (TTM) | -2.1% | -2.1% | -2.1% | -2.1% | -2.7% | -2.7% |
| P/E (TTM) | — | — | — | — | — | — |
| Net Margin | 5.2% | -2.7% | -2.7% | -2.7% | -3.6% | -3.6% |
| Gross Margin | 79.5% | 81.0% | 81.0% | 81.0% | 79.9% | 79.9% |
| D/E Ratio | 2.28 | 2.28 | 2.28 | 2.28 | 2.22 | 2.22 |
| Current Ratio | 6.85 | 6.85 | 6.85 | 6.85 | 6.47 | 6.47 |
Key Ratios
ROA (TTM)
-2.3%
P/S (TTM)
3.31
P/B
1.6
EPS (TTM)
$-0.45
CF/Share
$-2.39
Rev Growth 3Y
+52.3%
52W High
$42.18
52W Low
$14.59
$14.59
52-Week Range
$42.18
Financial Health
Free Cash Flow
$19.7M
Net Debt
-$79.8M
Cash
$116.7M
Total Debt
$36.9M
As of Dec 31, 2025
How does CSTL compare to Health Care peers?
Peer group: Micro-cap Health Care (All) · 241 companies
CSTL valuation vs Health Care peers
P/E ratio
—
▼
0%
below
peers
(30.7)
vs Peers
vs Industry
Undervalued
P/S ratio
3.3
▲
28%
above
peers
(2.6)
vs Peers
vs Industry
Pricier
P/B ratio
1.6
▼
41%
below
peers
(2.8)
vs Peers
vs Industry
Undervalued
Div yield
—
▼
0%
below
peers
(0.7%)
vs Peers
vs Industry
Low yield
CSTL profitability vs Health Care peers
ROE
-2.7%
▲
93%
above
peers
(-38.5%)
vs Peers
vs Industry
Below avg
Net margin
-3.6%
▲
86%
above
peers
(-24.7%)
vs Peers
vs Industry
Below avg
Gross margin
79.9%
▲
51%
above
peers
(52.9%)
vs Peers
vs Industry
Top tier
ROA
-2.3%
▲
89%
above
peers
(-21.2%)
vs Peers
vs Industry
Below avg
CSTL financial health vs Health Care peers
D/E ratio
2.2
▼
88%
below
peers
(19.3)
vs Peers
vs Industry
Above avg
Current ratio
6.5
▲
199%
above
peers
(2.2)
vs Peers
vs Industry
Strong liquidity
Beta
1.1
▲
4%
above
peers
(1.1)
vs Peers
vs Industry
Less volatile
CSTL fundamentals radar
CSTL
Peer median
Industry
CSTL profitability vs leverage
Bubble size = market cap · X = net margin · Y = D/E ratio
CSTL vs peers: key metrics
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