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CASTLE BIOSCIENCES INC

CSTL

$34.88 ▲ +0.04 (+0.11%) at close

9 Visible periods

32 Metrics

Peer-ranked Benchmarks

Price Chart

Health

Poor

Moderately Bearish

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Analytical Summary

CASTLE BIOSCIENCES INC faces fundamental challenges with weakness in Profit Margin (%) and Operating Margin (%). Investors should exercise caution and monitor for improvement in key metrics.

Market Cap $1.0B

Dividend Yield —

Revenue Growth 3.7% ↘

Op. Margin -12.4% ↘

ROIC -7.0% ↘

FCF / Share $0.98 ↘

Trailing P/E —

Price / Book 2.2x

FCF Yield 2.8%

Debt / Equity 0.02

info Valuation on last close. End-of-day price, Sep 23, 2026.

9-Year Financial Trajectory

Annual

Metric Value Trend Year over Year Percentile

Revenue Total top-line sales

$344.23M

↑ +3.7% —

Net Income Profit after all expenses

$-24.16M

↓ -232.4% —

Operating Margin Operating profit as % of sales

-12.4%

↓ -576.3% 13th

FCF / Share Free cash flow per share

$0.98

↓ -25.7% —

Long-Term Debt Long-term obligations

$10.06M

— +0.3% —

trending_up

Bullish Indicators

Debt to EquityDebt to Equity is in the top quartile (lower is better)

warning

Bearish Risks

Operating Margin (%)Operating Margin (%) is in the bottom quartile
Profit Margin (%)Profit Margin (%) is in the bottom quartile

Health Breakdown

Profitability ↑

Returns ↑

Financial Health →

Cash Quality

Dividend History

Dividend / share · sourced from SEC filings

$0.00 Latest / share

FY 2017

$0.00

FY 2018

$0.00

FY 2019

$0.00

FY 2020

$0.00

FY 2021

$0.00

FY 2022

$0.00

FY 2023

$0.00

FY 2024

$0.00

FY 2025

Financial view

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📈 Is growth accelerating? 6 metrics

Metric	FY 2025 Dec 31, 2025 10-K ↗	FY 2024 Dec 31, 2024 10-K ↗	FY 2023 Dec 31, 2023 10-K ↗	FY 2022 Dec 31, 2022 10-K ↗	FY 2021 Dec 31, 2021 10-K ↗	FY 2020 Dec 31, 2020 10-K ↗	FY 2019 Dec 31, 2019 10-K ↗	FY 2018 Dec 31, 2018 10-K ↗	FY 2017 Dec 31, 2017 10-K ↗
Revenue Growth YoY (%)	3.7% Caution ↓ Caution Declining Year-over-year change in total revenue Optimal: > 10% vs Sector: Below avg (-54%)	51.1% Excellent → Excellent Stable Year-over-year change in total revenue Optimal: > 10% vs Sector: Above avg (+539%)	60.4% Excellent ↑ Excellent Improving Year-over-year change in total revenue Optimal: > 10% vs Sector: Above avg (+655%)	45.7% Excellent ↓ Excellent Declining Year-over-year change in total revenue Optimal: > 10% vs Sector: Above avg (+471%)	50.2% Excellent ↓ Excellent Declining Year-over-year change in total revenue Optimal: > 10% vs Sector: Above avg (+527%)	20.8% Excellent Excellent Year-over-year change in total revenue Optimal: > 10% vs Sector: Above avg (+160%)	127.6% Excellent Excellent Year-over-year change in total revenue Optimal: > 10% vs Sector: Above avg (+1495%)	—	—
EPS Growth YoY (%)	N/M	N/M	17.1% Good ↑ Good Improving Year-over-year change in earnings per share Optimal: > 10%	-108.1% Weak Weak Year-over-year change in earnings per share Optimal: > 10%	-129.6% Weak Weak Year-over-year change in earnings per share Optimal: > 10%	N/M	N/M	—	—
Net Income Growth YoY (%)	N/M	N/M	14.4% Fair ↑ Fair Improving Year-over-year change in net income	-114.6% Weak Weak Year-over-year change in net income	-204.3% Weak Weak Year-over-year change in net income	N/M	N/M	—	—
FCF Growth YoY (%)	-25.7% Weak ↓ Weak Declining Year-over-year change in free cash flow	N/M	60.4% Excellent ↑ Excellent Improving Year-over-year change in free cash flow	-103.1% Weak Weak Year-over-year change in free cash flow	N/M	-61.8% Weak Weak Year-over-year change in free cash flow	N/M	—	—
Revenue CAGR 3Y (%)	35.9% Excellent ↓ Excellent Declining Compound annual revenue growth over 3 years	52.3% Excellent → Excellent Stable Compound annual revenue growth over 3 years	51.9% Excellent ↑ Excellent Improving Compound annual revenue growth over 3 years	38.2% Excellent Excellent Compound annual revenue growth over 3 years	60.4% Excellent Excellent Compound annual revenue growth over 3 years	—	—	—	—
Revenue CAGR 5Y (%)	40.6% Excellent ↓ Excellent Declining Compound annual revenue growth over 5 years	45.0% Excellent Excellent Compound annual revenue growth over 5 years	57.4% Excellent Excellent Compound annual revenue growth over 5 years	—	—	—	—	—	—

💰 Are margins durable? 4 metrics

Metric	FY 2025 Dec 31, 2025 10-K ↗	FY 2024 Dec 31, 2024 10-K ↗	FY 2023 Dec 31, 2023 10-K ↗	FY 2022 Dec 31, 2022 10-K ↗	FY 2021 Dec 31, 2021 10-K ↗	FY 2020 Dec 31, 2020 10-K ↗	FY 2019 Dec 31, 2019 10-K ↗	FY 2018 Dec 31, 2018 10-K ↗	FY 2017 Dec 31, 2017 10-K ↗
Operating Margin (%) (%)	-12.4% Weak ↑ Weak Improving Operating income as a percentage of revenue Optimal: > 15% vs Sector: Below avg (-183%)	2.6% Weak ↑ Weak Improving Operating income as a percentage of revenue Optimal: > 15% vs Sector: Below avg (-83%)	-30.9% Weak ↑ Weak Improving Operating income as a percentage of revenue Optimal: > 15% vs Sector: Below avg (-306%)	-53.2% Weak ↓ Weak Declining Operating income as a percentage of revenue Optimal: > 15% vs Sector: Below avg (-454%)	-42.6% Weak ↓ Weak Declining Operating income as a percentage of revenue Optimal: > 15% vs Sector: Below avg (-384%)	-10.4% Weak ↓ Weak Declining Operating income as a percentage of revenue Optimal: > 15% vs Sector: Below avg (-170%)	14.1% Fair Fair Operating income as a percentage of revenue Optimal: > 15% vs Sector: Below avg (-6%)	-16.8% Weak Weak Operating income as a percentage of revenue Optimal: > 15% vs Sector: Below avg (-212%)	—
Profit Margin (%) (%)	-7.0% Weak ↑ Weak Improving Net income as a percentage of revenue Optimal: > 15% vs Sector: Below avg (-158%)	5.5% Caution ↑ Caution Improving Net income as a percentage of revenue Optimal: > 15% vs Sector: Below avg (-54%)	-26.1% Weak ↑ Weak Improving Net income as a percentage of revenue Optimal: > 15% vs Sector: Below avg (-318%)	-49.0% Weak ↓ Weak Declining Net income as a percentage of revenue Optimal: > 15% vs Sector: Below avg (-508%)	-33.3% Weak ↓ Weak Declining Net income as a percentage of revenue Optimal: > 15% vs Sector: Below avg (-377%)	-16.4% Weak ↓ Weak Declining Net income as a percentage of revenue Optimal: > 15% vs Sector: Below avg (-237%)	10.2% Fair Fair Net income as a percentage of revenue Optimal: > 15% vs Sector: Below avg (-15%)	-27.9% Weak Weak Net income as a percentage of revenue Optimal: > 15% vs Sector: Below avg (-333%)	—
FCF Margin (%) (%)	8.2% Caution ↑ Caution Improving Free cash flow as a percentage of revenue Optimal: > 10%	11.0% Fair ↑ Fair Improving Free cash flow as a percentage of revenue Optimal: > 10%	-8.8% Weak ↑ Weak Improving Free cash flow as a percentage of revenue Optimal: > 10%	-34.5% Weak ↓ Weak Declining Free cash flow as a percentage of revenue Optimal: > 10%	-23.9% Weak ↓ Weak Declining Free cash flow as a percentage of revenue Optimal: > 10%	8.2% Caution ↑ Caution Improving Free cash flow as a percentage of revenue Optimal: > 10%	11.7% Fair Fair Free cash flow as a percentage of revenue Optimal: > 10%	-55.2% Weak Weak Free cash flow as a percentage of revenue Optimal: > 10%	—
FCF / Net Income (x)	-1.17x Weak ↓ Weak Declining Free cash flow relative to reported net income Optimal: > 1x	2.00x Excellent ↑ Excellent Improving Free cash flow relative to reported net income Optimal: > 1x	0.33x Weak ↑ Weak Improving Free cash flow relative to reported net income Optimal: > 1x	0.70x Caution ↑ Caution Improving Free cash flow relative to reported net income Optimal: > 1x	0.72x Caution ↓ Caution Declining Free cash flow relative to reported net income Optimal: > 1x	-0.50x Weak ↓ Weak Declining Free cash flow relative to reported net income Optimal: > 1x	1.15x Fair Fair Free cash flow relative to reported net income Optimal: > 1x	1.97x Excellent Excellent Free cash flow relative to reported net income Optimal: > 1x	—

🎯 Is capital allocation efficient? 3 metrics

Metric	FY 2025 Dec 31, 2025 10-K ↗	FY 2024 Dec 31, 2024 10-K ↗	FY 2023 Dec 31, 2023 10-K ↗	FY 2022 Dec 31, 2022 10-K ↗	FY 2021 Dec 31, 2021 10-K ↗	FY 2020 Dec 31, 2020 10-K ↗	FY 2019 Dec 31, 2019 10-K ↗	FY 2018 Dec 31, 2018 10-K ↗	FY 2017 Dec 31, 2017 10-K ↗
Return on Invested Capital (%)	-7.0% Weak ↑ Weak Improving Return earned on debt + equity capital invested Optimal: > 10%	1.5% Weak ↑ Weak Improving Return earned on debt + equity capital invested Optimal: > 10%	-13.7% Weak ↓ Weak Declining Return earned on debt + equity capital invested Optimal: > 10%	-14.4% Weak ↓ Weak Declining Return earned on debt + equity capital invested Optimal: > 10%	-7.7% Weak ↓ Weak Declining Return earned on debt + equity capital invested Optimal: > 10%	-1.2% Weak ↓ Weak Declining Return earned on debt + equity capital invested Optimal: > 10%	5.2% Caution Caution Return earned on debt + equity capital invested Optimal: > 10%	9.5% Fair Fair Return earned on debt + equity capital invested Optimal: > 10%	—
Return on Capital (%) (%)	-7.4% Weak ↑ Weak Improving Operating profit relative to total assets Optimal: > 10%	1.6% Weak ↑ Weak Improving Operating profit relative to total assets Optimal: > 10%	-15.0% Weak ↓ Weak Declining Operating profit relative to total assets Optimal: > 10%	-16.3% Weak ↓ Weak Declining Operating profit relative to total assets Optimal: > 10%	-8.7% Weak ↓ Weak Declining Operating profit relative to total assets Optimal: > 10%	-1.5% Weak ↑ Weak Improving Operating profit relative to total assets Optimal: > 10%	6.1% Caution Caution Operating profit relative to total assets Optimal: > 10%	-17.1% Weak Weak Operating profit relative to total assets Optimal: > 10%	—
Return on Common Equity (%) (%)	-5.1% Weak ↑ Weak Improving Profit generated per dollar of shareholder equity Optimal: > 15% vs Sector: Below avg (-134%)	4.0% Weak ↑ Weak Improving Profit generated per dollar of shareholder equity Optimal: > 15% vs Sector: Below avg (-73%)	-14.7% Weak ↓ Weak Declining Profit generated per dollar of shareholder equity Optimal: > 15% vs Sector: Below avg (-198%)	-16.8% Weak ↓ Weak Declining Profit generated per dollar of shareholder equity Optimal: > 15% vs Sector: Below avg (-212%)	-7.6% Weak ↓ Weak Declining Profit generated per dollar of shareholder equity Optimal: > 15% vs Sector: Below avg (-151%)	-2.5% Weak ↓ Weak Declining Profit generated per dollar of shareholder equity Optimal: > 15% vs Sector: Below avg (-116%)	6.2% Caution Caution Profit generated per dollar of shareholder equity Optimal: > 15% vs Sector: Below avg (-59%)	11.3% Fair Fair Profit generated per dollar of shareholder equity Optimal: > 15% vs Sector: Below avg (-25%)	—

⚖️ Is the balance sheet risky? 4 metrics

Metric	FY 2025 Dec 31, 2025 10-K ↗	FY 2024 Dec 31, 2024 10-K ↗	FY 2023 Dec 31, 2023 10-K ↗	FY 2022 Dec 31, 2022 10-K ↗	FY 2021 Dec 31, 2021 10-K ↗	FY 2020 Dec 31, 2020 10-K ↗	FY 2019 Dec 31, 2019 10-K ↗	FY 2018 Dec 31, 2018 10-K ↗	FY 2017 Dec 31, 2017 10-K ↗
Debt to Equity (x)	0.02x Excellent ↑ Excellent Improving Total debt relative to shareholder equity Optimal: < 0.6x vs Sector: Below avg (-96%)	0.02x Excellent Excellent Total debt relative to shareholder equity Optimal: < 0.6x vs Sector: Below avg (-96%)	0.00x Excellent Excellent Total debt relative to shareholder equity Optimal: < 0.6x vs Sector: Below avg (-100%)	—	—	0.00x Excellent ↑ Excellent Improving Total debt relative to shareholder equity Optimal: < 0.6x vs Sector: Below avg (-100%)	0.31x Good Good Total debt relative to shareholder equity Optimal: < 0.6x vs Sector: Below avg (-48%)	-0.43x Excellent Excellent Total debt relative to shareholder equity Optimal: < 0.6x vs Sector: Below avg (-172%)	—
Interest Coverage (x)	-725.59x Weak ↑ Weak Improving Operating income divided by interest expense Optimal: > 5x	19.98x Excellent ↑ Excellent Improving Operating income divided by interest expense Optimal: > 5x	-6179.73x Weak ↑ Weak Improving Operating income divided by interest expense Optimal: > 5x	-4285.59x Weak ↑ Weak Improving Operating income divided by interest expense Optimal: > 5x	-40079.00x Weak ↓ Weak Declining Operating income divided by interest expense Optimal: > 5x	-2.48x Weak ↓ Weak Declining Operating income divided by interest expense Optimal: > 5x	1.60x Caution Caution Operating income divided by interest expense Optimal: > 5x	-1.69x Weak Weak Operating income divided by interest expense Optimal: > 5x	—
Net Debt (USD)	$-106.67M	$-109.69M	$-98.84M	$-122.95M	$-329.63M	$-409.85M	$-72.16M	$20.02M	—
Debt / EBITDA (x)	-4.93x Excellent ↓ Excellent Declining Debt relative to earnings before interest, taxes, depreciation Optimal: < 2x	0.41x Excellent Excellent Debt relative to earnings before interest, taxes, depreciation Optimal: < 2x	0.00x Excellent Excellent Debt relative to earnings before interest, taxes, depreciation Optimal: < 2x	—	—	0.00x Excellent ↑ Excellent Improving Debt relative to earnings before interest, taxes, depreciation Optimal: < 2x	3.47x Caution Caution Debt relative to earnings before interest, taxes, depreciation Optimal: < 2x	-6.90x Excellent Excellent Debt relative to earnings before interest, taxes, depreciation Optimal: < 2x	—

📊 What does each share earn? 8 metrics

Metric	FY 2025 Dec 31, 2025 10-K ↗	FY 2024 Dec 31, 2024 10-K ↗	FY 2023 Dec 31, 2023 10-K ↗	FY 2022 Dec 31, 2022 10-K ↗	FY 2021 Dec 31, 2021 10-K ↗	FY 2020 Dec 31, 2020 10-K ↗	FY 2019 Dec 31, 2019 10-K ↗	FY 2018 Dec 31, 2018 10-K ↗	FY 2017 Dec 31, 2017 10-K ↗
Revenue per Share (USD)	$11.88	$11.96	$8.20	$5.26	$3.74	$3.31	$6.04	$11.95	—
Basic EPS, GAAP (USD)	$-0.83	$0.66	$-2.14	$-2.58	$-1.24	$-0.54	$0.35	$-5.33	—
Free Cash Flow per Share (USD)	$0.98	$1.32	$-0.72	$-1.81	$-0.89	$0.27	$0.71	$-6.60	—
Dividend per Share (USD)	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	—
Book Value per Share (USD)	$15.86	$16.00	$14.27	$15.03	$16.22	$16.75	$4.97	$-29.52	—
Tangible Book Value per Share (USD)	$15.50	$15.63	$13.88	$14.63	$16.22	$16.75	$4.97	$-29.52	—
Basic Weighted Avg Shares (shares)	28.99M	27.78M	26.80M	26.05M	25.14M	18.93M	8.58M	1.91M	—
Dividend Payout Ratio (%)	0.0% Excellent → Excellent Stable Dividends paid as a percentage of earnings Optimal: 30-60%	0.0% Excellent → Excellent Stable Dividends paid as a percentage of earnings Optimal: 30-60%	0.0% Excellent → Excellent Stable Dividends paid as a percentage of earnings Optimal: 30-60%	0.0% Excellent → Excellent Stable Dividends paid as a percentage of earnings Optimal: 30-60%	0.0% Excellent → Excellent Stable Dividends paid as a percentage of earnings Optimal: 30-60%	0.0% Excellent → Excellent Stable Dividends paid as a percentage of earnings Optimal: 30-60%	0.0% Excellent Excellent Dividends paid as a percentage of earnings Optimal: 30-60%	0.0% Excellent Excellent Dividends paid as a percentage of earnings Optimal: 30-60%	—

🏦 How resilient is the balance sheet? 3 metrics

Metric	FY 2025 Dec 31, 2025 10-K ↗	FY 2024 Dec 31, 2024 10-K ↗	FY 2023 Dec 31, 2023 10-K ↗	FY 2022 Dec 31, 2022 10-K ↗	FY 2021 Dec 31, 2021 10-K ↗	FY 2020 Dec 31, 2020 10-K ↗	FY 2019 Dec 31, 2019 10-K ↗	FY 2018 Dec 31, 2018 10-K ↗	FY 2017 Dec 31, 2017 10-K ↗
Working Capital (USD)	$292.42M	$310.76M	$247.97M	$256.16M	$328.86M	$408.72M	$101.39M	$11.39M	—
LT Debt (USD)	$10.06M	$10.02M	$0.00	—	—	$0.00	$26.69M	$24.50M	—
Total Equity (USD)	$470.87M	$455.83M	$391.27M	$399.15M	$411.74M	$415.69M	$85.11M	$-56.57M	$-50.31M

📋 What is driving earnings? 4 metrics

Metric	FY 2025 Dec 31, 2025 10-K ↗	FY 2024 Dec 31, 2024 10-K ↗	FY 2023 Dec 31, 2023 10-K ↗	FY 2022 Dec 31, 2022 10-K ↗	FY 2021 Dec 31, 2021 10-K ↗	FY 2020 Dec 31, 2020 10-K ↗	FY 2019 Dec 31, 2019 10-K ↗	FY 2018 Dec 31, 2018 10-K ↗	FY 2017 Dec 31, 2017 10-K ↗
Sales/Revenue/Turnover (USD)	$344.23M	$332.07M	$219.79M	$137.04M	$94.08M	$62.65M	$51.87M	$22.79M	—
Depreciation Expense (USD)	$40.77M	$16.00M	$12.33M	$10.54M	$3.41M	$472.00K	$354.00K	$287.00K	—
Net Income, GAAP (USD)	$-24.16M	$18.25M	$-57.47M	$-67.14M	$-31.29M	$-10.28M	$5.28M	$-6.37M	—
Operating Cash Flow (USD)	$64.35M	$64.87M	$-5.63M	$-41.66M	$-18.98M	$9.87M	$7.01M	$-12.29M	—

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bar_chart Data from SEC EDGAR XBRL filings

Synced yesterday 9 years · 35 quarters

CASTLE BIOSCIENCES INC

Analytical Summary

9-Year Financial Trajectory

Bullish Indicators

Bearish Risks

Health Breakdown

Dividend History

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