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Castle Biosciences, Inc. CSTL NASDAQ

NASDAQ Global Market • Healthcare • Medical - Diagnostics & Research • US • USD

SharesGrow Score
58/100
2/7 Pass
SharesGrow Intrinsic Value
$2,068.57
+8388.2%
Analyst Price Target
$49.80
+104.3%
SharesGrow 7-Criteria Score All 7 criteria scored · valuation-related highlighted on this page

Castle Biosciences, Inc. (CSTL) has a negative trailing P/E of -29.5, meaning the company is currently unprofitable on a trailing twelve-month (TTM) basis. The forward P/E of 43.1 based on analyst estimates suggests a return to profitability is expected. Trailing earnings yield is -3.39%, forward earnings yield 2.32%. PEG 0.54 (Peter Lynch undervalued ≤1.0).

Criteria proven by this page:

  • VALUE (100/100, Pass) — PEG ≤ 1.0 — Peter Lynch undervalued (0.54); analyst target implies upside (+104.3%).
  • Forward P/E 43.1 — analysts expect a return to profitability with estimated EPS of $0.57 for FY2029.
  • PEG Ratio 0.54 — below 1.0 suggests the stock is undervalued relative to its earnings growth rate (Peter Lynch criterion).
  • Trailing Earnings Yield -3.39% — negative yield confirms the company is currently unprofitable. Investors are paying for a turnaround rather than current earnings. Forward yield improves to 2.32% as earnings recover.
  • Analyst consensus target $49.80 (+104.3% upside) — significant upside potential according to Wall Street analysts.

Overall SharesGrow Score: 58/100 with 2/7 criteria passed.

SharesGrow 7-Criteria Score
58/100
SG Score
View full scorecard →
VALUE
100/100
Price-to-Earnings & upside
Proven by this page
FUTURE
100/100
Analyst consensus
→ Forecast
PAST
25/100
→ Income
~
HEALTH
67/100
Debt-to-Equity & liquidity
→ Health
~
MOAT
49/100
→ Income
~
GROWTH
58/100
→ Income
INCOME
10/100
→ Income

Valuation Snapshot — CSTL

Valuation Multiples
P/E (TTM)-29.5
Forward P/E43.1
PEG Ratio0.54
Forward PEG0.54
P/B Ratio1.51
P/S Ratio2.10
EV/EBITDA48.9
Per Share Data
EPS (TTM)$-0.82
Forward EPS (Est.)$0.57
Book Value / Share$16.05
Revenue / Share$11.74
FCF / Share$0.97
Yields & Fair Value
Earnings Yield-3.39%
Forward Earnings Yield2.32%
Dividend Yield0.00%
SharesGrow IV$2,068.57 (+8388.2%)
Analyst Target$49.80 (+104.3%)

Historical Valuation

Year P/E (TTM) PEG Ratio P/B Ratio P/S Ratio Dividend Yield
2017 -16.9 0.00 -14.67 15.22 -
2018 -35.8 0.68 -22.64 10.00 -
2019 55.9 -0.35 3.47 5.69 -
2020 -123.6 0.49 3.06 20.29 -
2021 -34.4 -0.27 2.62 11.45 -
2022 -9.1 -0.08 1.54 4.48 -
2023 -10.1 0.59 1.48 2.63 -
2024 40.6 -0.31 1.62 2.23 -
2025 -46.7 0.21 2.39 3.28 -

EPS: Actual vs Estimates

P/E Ratio & Earnings Yield

Earnings Per Share (EPS) History

Year EPS (Diluted) Revenue Net Income Net Margin
2017 $-1.26 $13.75M $-12.37M -89.9%
2018 $-0.60 $22.79M $-6.37M -27.9%
2019 $-0.21 $51.87M $5.28M 10.2%
2020 $-0.54 $62.65M $-10.28M -16.4%
2021 $-1.24 $94.09M $-31.29M -33.3%
2022 $-2.58 $137.04M $-67.14M -49%
2023 $-2.14 $219.79M $-57.47M -26.1%
2024 $0.62 $332.07M $18.25M 5.5%
2025 $-0.83 $344.23M $-24.16M -7%

Analyst Estimates

Year EPS (Avg) EPS Range Revenue (Avg) Revenue Range Analysts
2026 $-1.17 $-1.57 – $-0.76 $345.63M $343.96M – $348.48M 6
2027 $-0.54 $-0.55 – $-0.54 $389.5M $387.61M – $392.71M 5
2028 $-0.03 $-0.36 – $0.31 $433.73M $431.63M – $437.3M 5
2029 $0.57 $0.56 – $0.57 $466.65M $464.39M – $470.5M 1
2030 $1.02 $1.01 – $1.03 $505.55M $503.1M – $509.72M 1
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