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CASTLE BIOSCIENCES INC

EDGAR

CSTL Quarterly report (10-Q) · filed 2026-07-30

Annual consolidated revenue for 2025: about USD 344.2M, using the latest reported figures. The previous period, 2024, was about USD 332.1M.

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Watchlist

Latest quarter

Revenue

104 million USD

2026 Q2 · USD

Exact inputs and evidence

Revenue: 103546000 USD Source

Operating margin

-2.96%

2026 Q2 · %

Exact inputs and evidence

Operating Income: -3070000 USD Source
Revenue: 103546000 USD Source

Operating cash flow

15.2 million USD

2026 Q2 · USD

Exact inputs and evidence

Operating Cash Flow: -6928000 USD Source
Operating Cash Flow: -22129000 USD Source

Free cash flow

6.55 million USD

2026 Q2 · USD

Exact inputs and evidence

Operating Cash Flow: -6928000 USD Source
Operating Cash Flow: -22129000 USD Source
Capital Expenditure: 21105000 USD Source
Capital Expenditure: 12455000 USD Source

Cash and cash equivalents: 62.1 million USD 2026-06-30 Source
Exact value

62100000 USD
Long-term debt including current maturities: 10.1 million USD 2026-06-30 Source
Exact value

10075000 USD
Shares outstanding: 30.5 million shares 2026-06-30 Source
Exact value

30508534 shares

Reported share-count change

5.27% · 1.53 million shares

Year-over-year change in reported shares. Splits, issuance and buybacks can affect this figure; it does not isolate employee compensation or economic dilution.

Exact inputs and evidence

28981151 shares · 2025-06-30· Source
30508534 shares · 2026-06-30· Source

Trailing twelve months

The four most recent complete quarters added together. This gives a full-year view that includes the latest quarterly results.

Revenue

357 million USD

2025-07-01 – 2026-06-30

Exact inputs and evidence

Revenue: 83043000 USD · 2025-07-01 – 2025-09-30 Source
Revenue: 344229000 USD · 2025-01-01 – 2025-12-31 Source
Revenue: 257219000 USD · 2025-01-01 – 2025-09-30 Source
Revenue: 83679000 USD · 2026-01-01 – 2026-03-31 Source
Revenue: 103546000 USD · 2026-04-01 – 2026-06-30 Source

Net income

-19.4 million USD

2025-07-01 – 2026-06-30

Exact inputs and evidence

Net income: -501000 USD · 2025-07-01 – 2025-09-30 Source
Net income: -24158000 USD · 2025-01-01 – 2025-12-31 Source
Net income: -21826000 USD · 2025-01-01 – 2025-09-30 Source
Net income: -14522000 USD · 2026-01-01 – 2026-03-31 Source
Net income: -2060000 USD · 2026-04-01 – 2026-06-30 Source

Operating cash flow

42.6 million USD

2025-07-01 – 2026-06-30

Exact inputs and evidence

Operating cash flow: 37416000 USD · 2025-01-01 – 2025-09-30 Source
Operating cash flow: 14785000 USD · 2025-01-01 – 2025-06-30 Source
Operating cash flow: 64347000 USD · 2025-01-01 – 2025-12-31 Source
Operating cash flow: 37416000 USD · 2025-01-01 – 2025-09-30 Source
Operating cash flow: -22129000 USD · 2026-01-01 – 2026-03-31 Source
Operating cash flow: -6928000 USD · 2026-01-01 – 2026-06-30 Source
Operating cash flow: -22129000 USD · 2026-01-01 – 2026-03-31 Source

Capital expenditure

43.1 million USD

2025-07-01 – 2026-06-30

Exact inputs and evidence

Capital expenditure: 28837000 USD · 2025-01-01 – 2025-09-30 Source
Capital expenditure: 14003000 USD · 2025-01-01 – 2025-06-30 Source
Capital expenditure: 36021000 USD · 2025-01-01 – 2025-12-31 Source
Capital expenditure: 28837000 USD · 2025-01-01 – 2025-09-30 Source
Capital expenditure: 12455000 USD · 2026-01-01 – 2026-03-31 Source
Capital expenditure: 21105000 USD · 2026-01-01 – 2026-06-30 Source
Capital expenditure: 12455000 USD · 2026-01-01 – 2026-03-31 Source

Free cash flow

-489 thousand USD

2025-07-01 – 2026-06-30

Exact inputs and evidence

Operating cash flow: 37416000 USD · 2025-01-01 – 2025-09-30 Source
Operating cash flow: 14785000 USD · 2025-01-01 – 2025-06-30 Source
Operating cash flow: 64347000 USD · 2025-01-01 – 2025-12-31 Source
Operating cash flow: 37416000 USD · 2025-01-01 – 2025-09-30 Source
Operating cash flow: -22129000 USD · 2026-01-01 – 2026-03-31 Source
Operating cash flow: -6928000 USD · 2026-01-01 – 2026-06-30 Source
Operating cash flow: -22129000 USD · 2026-01-01 – 2026-03-31 Source
Capital expenditure: 28837000 USD · 2025-01-01 – 2025-09-30 Source
Capital expenditure: 14003000 USD · 2025-01-01 – 2025-06-30 Source
Capital expenditure: 36021000 USD · 2025-01-01 – 2025-12-31 Source
Capital expenditure: 28837000 USD · 2025-01-01 – 2025-09-30 Source
Capital expenditure: 12455000 USD · 2026-01-01 – 2026-03-31 Source
Capital expenditure: 21105000 USD · 2026-01-01 – 2026-06-30 Source
Capital expenditure: 12455000 USD · 2026-01-01 – 2026-03-31 Source

Includes later revisions to earlier periods. Annual charts exclude incomplete years.

Latest filing recorded: 2026-07-30.

Financial data available through: 2025-12-31.

Coverage by financial measure

Revenue: 8 of 11 periods available· newest 2025-12-31
Operating income: 8 of 11 periods available· newest 2025-12-31
Net income: 8 of 11 periods available· newest 2025-12-31
Operating cash flow: 8 of 11 periods available· newest 2025-12-31
Capital expenditure: 8 of 11 periods available· newest 2025-12-31
Total assets: 8 of 11 periods available· newest 2025-12-31
Total liabilities: 8 of 11 periods available· newest 2025-12-31
Current assets: 8 of 11 periods available· newest 2025-12-31
Current liabilities: 8 of 11 periods available· newest 2025-12-31
Cash and cash equivalents: 8 of 11 periods available· newest 2025-12-31
Long-term debt including current maturities: 4 of 11 periods available· newest 2025-12-31
Shares outstanding: 8 of 11 periods available· newest 2025-12-31

Coverage describes values retained in this snapshot. Missing values are not zero; loading limits are reported separately.

What changed year over year

Latest complete year compared with the corresponding period one year earlier. These are measured changes; they do not establish their business causes.

Revenue
+3.7%

Prior period

USD 332.07 million

2024-01-01 – 2024-12-31
Current period

USD 344.23 million

2025-01-01 – 2025-12-31

Exact inputs and evidence

344229000 − 332069000 = 12160000 USD

332069000 USD · 2024-01-01 – 2024-12-31
Inspect prior input Prior source
344229000 USD · 2025-01-01 – 2025-12-31
Inspect current input Current source

Share or cite

Citation for Year-over-year change in Revenue · CASTLE BIOSCIENCES INC · 2025-12-31 CASTLE BIOSCIENCES INC (edgar:1447362) Year-over-year change in Revenue: 12160000 USD Concept: fundies:Revenue Period: 2025-01-01 to 2025-12-31 Values: Latest reported Published: 2026-11-02T09:03:37Z Snapshot: 9a17317dee912e8875124083fd2d038bbe46b2c4e51ea170e014978a5745ff01 Dimensions: Consolidated View: https://fundies.io/companies/edgar/1447362?view=overview&cadence=annual&surface=latest#period-changes-title Computed: Current period minus corresponding prior-year period Input fundies:Revenue: 344229000 USD (2025-01-01 to 2025-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000162828026012272/cstl-20251231.htm#1695104 Filing: 000162828026012272 Input fundies:Revenue: 332069000 USD (2024-01-01 to 2024-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000162828026012272/cstl-20251231.htm#1696069 Filing: 000162828026012272
The citation records this snapshot. The page link may show a newer release later.
Net income
-232.4%

Prior period

USD 18.25 million

2024-01-01 – 2024-12-31
Current period

−USD 24.16 million

2025-01-01 – 2025-12-31

Exact inputs and evidence

-24158000 − 18245000 = -42403000 USD

18245000 USD · 2024-01-01 – 2024-12-31
Inspect prior input Prior source
-24158000 USD · 2025-01-01 – 2025-12-31
Inspect current input Current source

Share or cite

Citation for Year-over-year change in Net income · CASTLE BIOSCIENCES INC · 2025-12-31 CASTLE BIOSCIENCES INC (edgar:1447362) Year-over-year change in Net income: -42403000 USD Concept: fundies:NetIncome Period: 2025-01-01 to 2025-12-31 Values: Latest reported Published: 2026-11-02T09:03:37Z Snapshot: 9a17317dee912e8875124083fd2d038bbe46b2c4e51ea170e014978a5745ff01 Dimensions: Consolidated View: https://fundies.io/companies/edgar/1447362?view=overview&cadence=annual&surface=latest#period-changes-title Computed: Current period minus corresponding prior-year period Input fundies:NetIncome: -24158000 USD (2025-01-01 to 2025-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000162828026012272/cstl-20251231.htm#1727418 Filing: 000162828026012272 Input fundies:NetIncome: 18245000 USD (2024-01-01 to 2024-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000162828026012272/cstl-20251231.htm#1728180 Filing: 000162828026012272
The citation records this snapshot. The page link may show a newer release later.
Operating cash flow
-0.8%

Prior period

USD 64.87 million

2024-01-01 – 2024-12-31
Current period

USD 64.35 million

2025-01-01 – 2025-12-31

Exact inputs and evidence

64347000 − 64866000 = -519000 USD

64866000 USD · 2024-01-01 – 2024-12-31
Inspect prior input Prior source
64347000 USD · 2025-01-01 – 2025-12-31
Inspect current input Current source

Share or cite

Citation for Year-over-year change in Operating cash flow · CASTLE BIOSCIENCES INC · 2025-12-31 CASTLE BIOSCIENCES INC (edgar:1447362) Year-over-year change in Operating cash flow: -519000 USD Concept: fundies:OperatingCashFlow Period: 2025-01-01 to 2025-12-31 Values: Latest reported Published: 2026-11-02T09:03:37Z Snapshot: 9a17317dee912e8875124083fd2d038bbe46b2c4e51ea170e014978a5745ff01 Dimensions: Consolidated View: https://fundies.io/companies/edgar/1447362?view=overview&cadence=annual&surface=latest#period-changes-title Computed: Current period minus corresponding prior-year period Input fundies:OperatingCashFlow: 64347000 USD (2025-01-01 to 2025-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000162828026012272/cstl-20251231.htm#1539537 Filing: 000162828026012272 Input fundies:OperatingCashFlow: 64866000 USD (2024-01-01 to 2024-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000162828026012272/cstl-20251231.htm#1540178 Filing: 000162828026012272
The citation records this snapshot. The page link may show a newer release later.
Capital expenditure
+27.2%

Prior period

USD 28.33 million

2024-01-01 – 2024-12-31
Current period

USD 36.02 million

2025-01-01 – 2025-12-31

Exact inputs and evidence

36021000 − 28326000 = 7695000 USD

28326000 USD · 2024-01-01 – 2024-12-31
Inspect prior input Prior source
36021000 USD · 2025-01-01 – 2025-12-31
Inspect current input Current source

Share or cite

Citation for Year-over-year change in Capital expenditure · CASTLE BIOSCIENCES INC · 2025-12-31 CASTLE BIOSCIENCES INC (edgar:1447362) Year-over-year change in Capital expenditure: 7695000 USD Concept: fundies:CapitalExpenditure Period: 2025-01-01 to 2025-12-31 Values: Latest reported Published: 2026-11-02T09:03:37Z Snapshot: 9a17317dee912e8875124083fd2d038bbe46b2c4e51ea170e014978a5745ff01 Dimensions: Consolidated View: https://fundies.io/companies/edgar/1447362?view=overview&cadence=annual&surface=latest#period-changes-title Computed: Current period minus corresponding prior-year period Input fundies:CapitalExpenditure: 36021000 USD (2025-01-01 to 2025-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000162828026012272/cstl-20251231.htm#1554232 Filing: 000162828026012272 Input fundies:CapitalExpenditure: 28326000 USD (2024-01-01 to 2024-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000162828026012272/cstl-20251231.htm#1554817 Filing: 000162828026012272
The citation records this snapshot. The page link may show a newer release later.

Where revenue goes

How a period’s revenue divides into costs and what remains as profit. Items marked Derived are calculated by subtraction from reported figures.

2025 2025-01-01 – 2025-12-31

Revenue USD 344.23 million 100% of revenue
Cost of revenue USD 71.03 million 21% of revenue
Operating expenses USD 281.17 million 82% of revenue
Other operating costs Derived USD 34.84 million 10% of revenue
Operating income −USD 42.81 million −12% of revenue
Tax, interest and other Derived −USD 18.65 million −5.4% of revenue
Net income −USD 24.16 million −7% of revenue

Cash

Operating cash flow USD 64.35 million 19% of revenue
Capital expenditure USD 36.02 million 10% of revenue
Free cash flow Derived USD 28.33 million 8.2% of revenue

Share of revenue by period

Net income
Tax, interest and other
Operating costs

2018 Operating loss: operating costs were 117% of revenue.
2019 10%86%
2020 Operating loss: operating costs were 110% of revenue.
2021 Operating loss: operating costs were 143% of revenue.
2022 Operating loss: operating costs were 153% of revenue.
2023 Operating loss: operating costs were 131% of revenue.
2024 Net income was higher than operating income, so the split is not drawn.
2025 Operating loss: operating costs were 112% of revenue.

Values and sources

Revenue breakdown by annual reporting period
Period	Revenue	Operating costs	Operating income	Tax, interest and other	Net income	Free cash flow	Source
2018 2018-01-01 – 2018-12-31	22786000	26622000 Derived	-3836000	2531000 Derived	-6367000	-12572000 Derived	Source 2018-01-01 – 2018-12-31: 22786000 USD Inspect Revenue Open source 2018-01-01 – 2018-12-31: -3836000 USD Inspect Operating Income Open source 2018-01-01 – 2018-12-31: -6367000 USD Inspect Net Income Open source 2018-01-01 – 2018-12-31: -12295000 USD Inspect Operating Cash Flow Open source 2018-01-01 – 2018-12-31: 277000 USD Inspect Capital Expenditure Open source
2019 2019-01-01 – 2019-12-31	51865000	44537000 Derived	7328000	2051000 Derived	5277000	6078000 Derived	Source 2019-01-01 – 2019-12-31: 51865000 USD Inspect Revenue Open source 2019-01-01 – 2019-12-31: 7328000 USD Inspect Operating Income Open source 2019-01-01 – 2019-12-31: 5277000 USD Inspect Net Income Open source 2019-01-01 – 2019-12-31: 7015000 USD Inspect Operating Cash Flow Open source 2019-01-01 – 2019-12-31: 937000 USD Inspect Capital Expenditure Open source
2020 2020-01-01 – 2020-12-31	62649000	69191000 Derived	-6542000	3742000 Derived	-10284000	5114000 Derived	Source 2020-01-01 – 2020-12-31: 62649000 USD Inspect Revenue Open source 2020-01-01 – 2020-12-31: -6542000 USD Inspect Operating Income Open source 2020-01-01 – 2020-12-31: -10284000 USD Inspect Net Income Open source 2020-01-01 – 2020-12-31: 9865000 USD Inspect Operating Cash Flow Open source 2020-01-01 – 2020-12-31: 4751000 USD Inspect Capital Expenditure Open source
2021 2021-01-01 – 2021-12-31	94085000	134164000 Derived	-40079000	-8787000 Derived	-31292000	-22466000 Derived	Source 2021-01-01 – 2021-12-31: 94085000 USD Inspect Revenue Open source 2021-01-01 – 2021-12-31: -40079000 USD Inspect Operating Income Open source 2021-01-01 – 2021-12-31: -31292000 USD Inspect Net Income Open source 2021-01-01 – 2021-12-31: -18983000 USD Inspect Operating Cash Flow Open source 2021-01-01 – 2021-12-31: 3483000 USD Inspect Capital Expenditure Open source
2022 2022-01-01 – 2022-12-31	137039000	209894000 Derived	-72855000	-5717000 Derived	-67138000	-47287000 Derived	Source 2022-01-01 – 2022-12-31: 137039000 USD Inspect Revenue Open source 2022-01-01 – 2022-12-31: -72855000 USD Inspect Operating Income Open source 2022-01-01 – 2022-12-31: -67138000 USD Inspect Net Income Open source 2022-01-01 – 2022-12-31: -41655000 USD Inspect Operating Cash Flow Open source 2022-01-01 – 2022-12-31: 5632000 USD Inspect Capital Expenditure Open source
2023 2023-01-01 – 2023-12-31	219788000	287765000 Derived	-67977000	-10511000 Derived	-57466000	-19247000 Derived	Source 2023-01-01 – 2023-12-31: 219788000 USD Inspect Revenue Open source 2023-01-01 – 2023-12-31: -67977000 USD Inspect Operating Income Open source 2023-01-01 – 2023-12-31: -57466000 USD Inspect Net Income Open source 2023-01-01 – 2023-12-31: -5626000 USD Inspect Operating Cash Flow Open source 2023-01-01 – 2023-12-31: 13621000 USD Inspect Capital Expenditure Open source
2024 2024-01-01 – 2024-12-31	332069000	323399000 Derived	8670000	-9575000 Derived	18245000	36540000 Derived	Source 2024-01-01 – 2024-12-31: 332069000 USD Inspect Revenue Open source 2024-01-01 – 2024-12-31: 8670000 USD Inspect Operating Income Open source 2024-01-01 – 2024-12-31: 18245000 USD Inspect Net Income Open source 2024-01-01 – 2024-12-31: 64866000 USD Inspect Operating Cash Flow Open source 2024-01-01 – 2024-12-31: 28326000 USD Inspect Capital Expenditure Open source
2025 2025-01-01 – 2025-12-31	344229000	387039000 Derived	-42810000	-18652000 Derived	-24158000	28326000 Derived	Source 2025-01-01 – 2025-12-31: 344229000 USD Inspect Revenue Open source 2025-01-01 – 2025-12-31: -42810000 USD Inspect Operating Income Open source 2025-01-01 – 2025-12-31: -24158000 USD Inspect Net Income Open source 2025-01-01 – 2025-12-31: 64347000 USD Inspect Operating Cash Flow Open source 2025-01-01 – 2025-12-31: 36021000 USD Inspect Capital Expenditure Open source

Amounts are exact, in USD.

Growth

Sales over time and how quickly they are changing.

Revenue

Revenue reported for each complete financial period.

USD 344.2M 2025

Values and sources

Revenue values and source evidence
Period	Series	Value(USD)	Source evidence
20182018-12-31	Revenue	22786000	Revenue: 22786000 Open source
20192019-12-31	Revenue	51865000	Revenue: 51865000 Open source
20202020-12-31	Revenue	62649000	Revenue: 62649000 Open source
20212021-12-31	Revenue	94085000	Revenue: 94085000 Open source
20222022-12-31	Revenue	137039000	Revenue: 137039000 Open source
20232023-12-31	Revenue	219788000	Revenue: 219788000 Open source
20242024-12-31	Revenue	332069000	Revenue: 332069000 Open source
20252025-12-31	Revenue	344229000	Revenue: 344229000 Open source

Revenue growth

Change in revenue from the same financial period one year earlier.

3.7% 2025

Values and sources

Revenue growth values and source evidence
Period	Series	Value	Source evidence
20182018-12-31	Year over year	No prior comparable period	Revenue: 22786000 Open source
20192019-12-31	Year over year	127.6%	Revenue: 51865000 Open source Revenue: 22786000 Open source
20202020-12-31	Year over year	20.8%	Revenue: 62649000 Open source Revenue: 51865000 Open source
20212021-12-31	Year over year	50.2%	Revenue: 94085000 Open source Revenue: 62649000 Open source
20222022-12-31	Year over year	45.7%	Revenue: 137039000 Open source Revenue: 94085000 Open source
20232023-12-31	Year over year	60.4%	Revenue: 219788000 Open source Revenue: 137039000 Open source
20242024-12-31	Year over year	51.1%	Revenue: 332069000 Open source Revenue: 219788000 Open source
20252025-12-31	Year over year	3.7%	Revenue: 344229000 Open source Revenue: 332069000 Open source

Profit and cash

How much revenue becomes profit, and how much cash operations generate.

Profit margins

Operating income, net income and free cash flow as a share of revenue.

Operating margin -12.4% 2025

Net margin -7% 2025

Free cash flow margin 8.2% 2025

Operating margin
Net margin
Free cash flow margin

Values and sources

Profit margins values and source evidence
Period	Series	Value	Source evidence
20182018-12-31	Operating margin	-16.8%	Operating Income: -3836000 Open source Revenue: 22786000 Open source
20192019-12-31	Operating margin	14.1%	Operating Income: 7328000 Open source Revenue: 51865000 Open source
20202020-12-31	Operating margin	-10.4%	Operating Income: -6542000 Open source Revenue: 62649000 Open source
20212021-12-31	Operating margin	-42.6%	Operating Income: -40079000 Open source Revenue: 94085000 Open source
20222022-12-31	Operating margin	-53.2%	Operating Income: -72855000 Open source Revenue: 137039000 Open source
20232023-12-31	Operating margin	-30.9%	Operating Income: -67977000 Open source Revenue: 219788000 Open source
20242024-12-31	Operating margin	2.6%	Operating Income: 8670000 Open source Revenue: 332069000 Open source
20252025-12-31	Operating margin	-12.4%	Operating Income: -42810000 Open source Revenue: 344229000 Open source
20182018-12-31	Net margin	-27.9%	Net Income: -6367000 Open source Revenue: 22786000 Open source
20192019-12-31	Net margin	10.2%	Net Income: 5277000 Open source Revenue: 51865000 Open source
20202020-12-31	Net margin	-16.4%	Net Income: -10284000 Open source Revenue: 62649000 Open source
20212021-12-31	Net margin	-33.3%	Net Income: -31292000 Open source Revenue: 94085000 Open source
20222022-12-31	Net margin	-49%	Net Income: -67138000 Open source Revenue: 137039000 Open source
20232023-12-31	Net margin	-26.1%	Net Income: -57466000 Open source Revenue: 219788000 Open source
20242024-12-31	Net margin	5.5%	Net Income: 18245000 Open source Revenue: 332069000 Open source
20252025-12-31	Net margin	-7%	Net Income: -24158000 Open source Revenue: 344229000 Open source
20182018-12-31	Free cash flow margin	-55.2%	Revenue: 22786000 Open source Operating Cash Flow: -12295000 Open source Capital Expenditure: 277000 Open source
20192019-12-31	Free cash flow margin	11.7%	Revenue: 51865000 Open source Operating Cash Flow: 7015000 Open source Capital Expenditure: 937000 Open source
20202020-12-31	Free cash flow margin	8.2%	Revenue: 62649000 Open source Operating Cash Flow: 9865000 Open source Capital Expenditure: 4751000 Open source
20212021-12-31	Free cash flow margin	-23.9%	Revenue: 94085000 Open source Operating Cash Flow: -18983000 Open source Capital Expenditure: 3483000 Open source
20222022-12-31	Free cash flow margin	-34.5%	Revenue: 137039000 Open source Operating Cash Flow: -41655000 Open source Capital Expenditure: 5632000 Open source
20232023-12-31	Free cash flow margin	-8.8%	Revenue: 219788000 Open source Operating Cash Flow: -5626000 Open source Capital Expenditure: 13621000 Open source
20242024-12-31	Free cash flow margin	11%	Revenue: 332069000 Open source Operating Cash Flow: 64866000 Open source Capital Expenditure: 28326000 Open source
20252025-12-31	Free cash flow margin	8.2%	Revenue: 344229000 Open source Operating Cash Flow: 64347000 Open source Capital Expenditure: 36021000 Open source

Operating cash flow

Cash generated by the company’s normal business operations.

USD 64.3M 2025

Values and sources

Operating cash flow values and source evidence
Period	Series	Value(USD)	Source evidence
20182018-12-31	Operating cash flow	-12295000	Operating Cash Flow: -12295000 Open source
20192019-12-31	Operating cash flow	7015000	Operating Cash Flow: 7015000 Open source
20202020-12-31	Operating cash flow	9865000	Operating Cash Flow: 9865000 Open source
20212021-12-31	Operating cash flow	-18983000	Operating Cash Flow: -18983000 Open source
20222022-12-31	Operating cash flow	-41655000	Operating Cash Flow: -41655000 Open source
20232023-12-31	Operating cash flow	-5626000	Operating Cash Flow: -5626000 Open source
20242024-12-31	Operating cash flow	64866000	Operating Cash Flow: 64866000 Open source
20252025-12-31	Operating cash flow	64347000	Operating Cash Flow: 64347000 Open source

Free cash flow

Operating cash flow minus capital expenditure for the same period and unit.

USD 28.3M 2025

Values and sources

Free cash flow values and source evidence
Period	Series	Value(USD)	Source evidence
20182018-12-31	Free cash flow	-12572000	Operating Cash Flow: -12295000 Open source Capital Expenditure: 277000 Open source
20192019-12-31	Free cash flow	6078000	Operating Cash Flow: 7015000 Open source Capital Expenditure: 937000 Open source
20202020-12-31	Free cash flow	5114000	Operating Cash Flow: 9865000 Open source Capital Expenditure: 4751000 Open source
20212021-12-31	Free cash flow	-22466000	Operating Cash Flow: -18983000 Open source Capital Expenditure: 3483000 Open source
20222022-12-31	Free cash flow	-47287000	Operating Cash Flow: -41655000 Open source Capital Expenditure: 5632000 Open source
20232023-12-31	Free cash flow	-19247000	Operating Cash Flow: -5626000 Open source Capital Expenditure: 13621000 Open source
20242024-12-31	Free cash flow	36540000	Operating Cash Flow: 64866000 Open source Capital Expenditure: 28326000 Open source
20252025-12-31	Free cash flow	28326000	Operating Cash Flow: 64347000 Open source Capital Expenditure: 36021000 Open source

Balance sheet

Liabilities and short-term ability to meet obligations at each period end.

Liabilities to assets

Total liabilities as a share of total assets.

18.6% 2025

Values and sources

Liabilities to assets values and source evidence
Period	Series	Value	Source evidence
20182018-12-31	Liabilities / assets	144.9%	Total Liabilities: 32475000 Open source Total Assets: 22405000 Open source
20192019-12-31	Liabilities / assets	28.9%	Total Liabilities: 34633000 Open source Total Assets: 119746000 Open source
20202020-12-31	Liabilities / assets	5.4%	Total Liabilities: 23637000 Open source Total Assets: 439328000 Open source
20212021-12-31	Liabilities / assets	11%	Total Liabilities: 50832000 Open source Total Assets: 462572000 Open source
20222022-12-31	Liabilities / assets	10.8%	Total Liabilities: 48179000 Open source Total Assets: 447329000 Open source
20232023-12-31	Liabilities / assets	13.7%	Total Liabilities: 62071000 Open source Total Assets: 453340000 Open source
20242024-12-31	Liabilities / assets	14.2%	Total Liabilities: 75400000 Open source Total Assets: 531235000 Open source
20252025-12-31	Liabilities / assets	18.6%	Total Liabilities: 107683000 Open source Total Assets: 578556000 Open source

Current assets to current liabilities

Current assets divided by current liabilities.

5.26× 2025

Values and sources

Current assets to current liabilities values and source evidence
Period	Series	Value	Source evidence
20182018-12-31	Current assets / current liabilities	2.69×	Current Assets: 18126000 Open source Current Liabilities: 6737000 Open source
20192019-12-31	Current assets / current liabilities	7.63×	Current Assets: 116681000 Open source Current Liabilities: 15289000 Open source
20202020-12-31	Current assets / current liabilities	20.58×	Current Assets: 429594000 Open source Current Liabilities: 20876000 Open source
20212021-12-31	Current assets / current liabilities	14.21×	Current Assets: 353743000 Open source Current Liabilities: 24886000 Open source
20222022-12-31	Current assets / current liabilities	8.09×	Current Assets: 292288000 Open source Current Liabilities: 36128000 Open source
20232023-12-31	Current assets / current liabilities	6.2×	Current Assets: 295635000 Open source Current Liabilities: 47667000 Open source
20242024-12-31	Current assets / current liabilities	7.29×	Current Assets: 360154000 Open source Current Liabilities: 49392000 Open source
20252025-12-31	Current assets / current liabilities	5.26×	Current Assets: 361097000 Open source Current Liabilities: 68677000 Open source

Cash generation

Compare reported profit with operating cash and capital spending. Free cash flow is calculated as operating cash flow minus capital expenditure when both exact, consolidated amounts match the same period and unit.

Cash generation by annual reporting period
Period	Net income	Operating cash flow	Capital expenditure	Free cash flow
2018 2018-01-01 – 2018-12-31	−USD 6.37 million Exact value Exact value: -6367000 USD 2018-01-01 – 2018-12-31: -6367000 USD Inspect Net Income Open source Share or cite Citation for Net Income · CASTLE BIOSCIENCES INC · 2018-12-31 CASTLE BIOSCIENCES INC (edgar:1447362) Net Income: -6367000 USD Concept: fundies:NetIncome Period: 2018-01-01 to 2018-12-31 Values: Latest reported Published: 2026-11-02T09:03:37Z Snapshot: 9a17317dee912e8875124083fd2d038bbe46b2c4e51ea170e014978a5745ff01 Dimensions: Consolidated View: https://fundies.io/companies/edgar/1447362/explain?concept=fundies%3ANetIncome&period=2018-12-31&surface=latest&period_type=duration&start=2018-01-01&unit=USD&dimensions= Input fundies:NetIncome: -6367000 USD (2018-01-01 to 2018-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000144736220000029/cstl-20191231.xml#322133 Filing: 000144736220000029 The citation records this snapshot. The page link may show a newer release later.	−USD 12.3 million Exact value Exact value: -12295000 USD 2018-01-01 – 2018-12-31: -12295000 USD Inspect Operating Cash Flow Open source Share or cite Citation for Operating Cash Flow · CASTLE BIOSCIENCES INC · 2018-12-31 CASTLE BIOSCIENCES INC (edgar:1447362) Operating Cash Flow: -12295000 USD Concept: fundies:OperatingCashFlow Period: 2018-01-01 to 2018-12-31 Values: Latest reported Published: 2026-11-02T09:03:37Z Snapshot: 9a17317dee912e8875124083fd2d038bbe46b2c4e51ea170e014978a5745ff01 Dimensions: Consolidated View: https://fundies.io/companies/edgar/1447362/explain?concept=fundies%3AOperatingCashFlow&period=2018-12-31&surface=latest&period_type=duration&start=2018-01-01&unit=USD&dimensions= Input fundies:OperatingCashFlow: -12295000 USD (2018-01-01 to 2018-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000144736220000029/cstl-20191231.xml#321100 Filing: 000144736220000029 The citation records this snapshot. The page link may show a newer release later.	USD 277,000 Exact value Exact value: 277000 USD 2018-01-01 – 2018-12-31: 277000 USD Inspect Capital Expenditure Open source Share or cite Citation for Capital Expenditure · CASTLE BIOSCIENCES INC · 2018-12-31 CASTLE BIOSCIENCES INC (edgar:1447362) Capital Expenditure: 277000 USD Concept: fundies:CapitalExpenditure Period: 2018-01-01 to 2018-12-31 Values: Latest reported Published: 2026-11-02T09:03:37Z Snapshot: 9a17317dee912e8875124083fd2d038bbe46b2c4e51ea170e014978a5745ff01 Dimensions: Consolidated View: https://fundies.io/companies/edgar/1447362/explain?concept=fundies%3ACapitalExpenditure&period=2018-12-31&surface=latest&period_type=duration&start=2018-01-01&unit=USD&dimensions= Input fundies:CapitalExpenditure: 277000 USD (2018-01-01 to 2018-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000144736220000029/cstl-20191231.xml#330923 Filing: 000144736220000029 The citation records this snapshot. The page link may show a newer release later.	−USD 12.57 million Calculation and evidence -12295000 − 277000 USD Exact free cash flow: -12572000 USD 2018-01-01 – 2018-12-31: -12295000 USD · Inspect Operating Cash Flow · Source 2018-01-01 – 2018-12-31: 277000 USD · Inspect Capital Expenditure · Source Share or cite Citation for Free cash flow · CASTLE BIOSCIENCES INC · 2018-12-31 CASTLE BIOSCIENCES INC (edgar:1447362) Free cash flow: -12572000 USD Concept: free-cash-flow Period: 2018-01-01 to 2018-12-31 Values: Latest reported Published: 2026-11-02T09:03:37Z Snapshot: 9a17317dee912e8875124083fd2d038bbe46b2c4e51ea170e014978a5745ff01 Dimensions: Consolidated View: https://fundies.io/companies/edgar/1447362?view=overview&cadence=annual&surface=latest#cash-generation-title Computed: Operating cash flow minus capital expenditure Input fundies:OperatingCashFlow: -12295000 USD (2018-01-01 to 2018-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000144736220000029/cstl-20191231.xml#321100 Filing: 000144736220000029 Input fundies:CapitalExpenditure: 277000 USD (2018-01-01 to 2018-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000144736220000029/cstl-20191231.xml#330923 Filing: 000144736220000029 The citation records this snapshot. The page link may show a newer release later.
2019 2019-01-01 – 2019-12-31	USD 5.28 million Exact value Exact value: 5277000 USD 2019-01-01 – 2019-12-31: 5277000 USD Inspect Net Income Open source Share or cite Citation for Net Income · CASTLE BIOSCIENCES INC · 2019-12-31 CASTLE BIOSCIENCES INC (edgar:1447362) Net Income: 5277000 USD Concept: fundies:NetIncome Period: 2019-01-01 to 2019-12-31 Values: Latest reported Published: 2026-11-02T09:03:37Z Snapshot: 9a17317dee912e8875124083fd2d038bbe46b2c4e51ea170e014978a5745ff01 Dimensions: Consolidated View: https://fundies.io/companies/edgar/1447362/explain?concept=fundies%3ANetIncome&period=2019-12-31&surface=latest&period_type=duration&start=2019-01-01&unit=USD&dimensions= Input fundies:NetIncome: 5277000 USD (2019-01-01 to 2019-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000144736221000047/cstl-20201231.htm#2360644 Filing: 000144736221000047 The citation records this snapshot. The page link may show a newer release later.	USD 7.02 million Exact value Exact value: 7015000 USD 2019-01-01 – 2019-12-31: 7015000 USD Inspect Operating Cash Flow Open source Share or cite Citation for Operating Cash Flow · CASTLE BIOSCIENCES INC · 2019-12-31 CASTLE BIOSCIENCES INC (edgar:1447362) Operating Cash Flow: 7015000 USD Concept: fundies:OperatingCashFlow Period: 2019-01-01 to 2019-12-31 Values: Latest reported Published: 2026-11-02T09:03:37Z Snapshot: 9a17317dee912e8875124083fd2d038bbe46b2c4e51ea170e014978a5745ff01 Dimensions: Consolidated View: https://fundies.io/companies/edgar/1447362/explain?concept=fundies%3AOperatingCashFlow&period=2019-12-31&surface=latest&period_type=duration&start=2019-01-01&unit=USD&dimensions= Input fundies:OperatingCashFlow: 7015000 USD (2019-01-01 to 2019-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000144736221000047/cstl-20201231.htm#1557673 Filing: 000144736221000047 The citation records this snapshot. The page link may show a newer release later.	USD 937,000 Exact value Exact value: 937000 USD 2019-01-01 – 2019-12-31: 937000 USD Inspect Capital Expenditure Open source Share or cite Citation for Capital Expenditure · CASTLE BIOSCIENCES INC · 2019-12-31 CASTLE BIOSCIENCES INC (edgar:1447362) Capital Expenditure: 937000 USD Concept: fundies:CapitalExpenditure Period: 2019-01-01 to 2019-12-31 Values: Latest reported Published: 2026-11-02T09:03:37Z Snapshot: 9a17317dee912e8875124083fd2d038bbe46b2c4e51ea170e014978a5745ff01 Dimensions: Consolidated View: https://fundies.io/companies/edgar/1447362/explain?concept=fundies%3ACapitalExpenditure&period=2019-12-31&surface=latest&period_type=duration&start=2019-01-01&unit=USD&dimensions= Input fundies:CapitalExpenditure: 937000 USD (2019-01-01 to 2019-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000144736221000047/cstl-20201231.htm#1560714 Filing: 000144736221000047 The citation records this snapshot. The page link may show a newer release later.	USD 6.08 million Calculation and evidence 7015000 − 937000 USD Exact free cash flow: 6078000 USD 2019-01-01 – 2019-12-31: 7015000 USD · Inspect Operating Cash Flow · Source 2019-01-01 – 2019-12-31: 937000 USD · Inspect Capital Expenditure · Source Share or cite Citation for Free cash flow · CASTLE BIOSCIENCES INC · 2019-12-31 CASTLE BIOSCIENCES INC (edgar:1447362) Free cash flow: 6078000 USD Concept: free-cash-flow Period: 2019-01-01 to 2019-12-31 Values: Latest reported Published: 2026-11-02T09:03:37Z Snapshot: 9a17317dee912e8875124083fd2d038bbe46b2c4e51ea170e014978a5745ff01 Dimensions: Consolidated View: https://fundies.io/companies/edgar/1447362?view=overview&cadence=annual&surface=latest#cash-generation-title Computed: Operating cash flow minus capital expenditure Input fundies:OperatingCashFlow: 7015000 USD (2019-01-01 to 2019-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000144736221000047/cstl-20201231.htm#1557673 Filing: 000144736221000047 Input fundies:CapitalExpenditure: 937000 USD (2019-01-01 to 2019-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000144736221000047/cstl-20201231.htm#1560714 Filing: 000144736221000047 The citation records this snapshot. The page link may show a newer release later.
2020 2020-01-01 – 2020-12-31	−USD 10.28 million Exact value Exact value: -10284000 USD 2020-01-01 – 2020-12-31: -10284000 USD Inspect Net Income Open source Share or cite Citation for Net Income · CASTLE BIOSCIENCES INC · 2020-12-31 CASTLE BIOSCIENCES INC (edgar:1447362) Net Income: -10284000 USD Concept: fundies:NetIncome Period: 2020-01-01 to 2020-12-31 Values: Latest reported Published: 2026-11-02T09:03:37Z Snapshot: 9a17317dee912e8875124083fd2d038bbe46b2c4e51ea170e014978a5745ff01 Dimensions: Consolidated View: https://fundies.io/companies/edgar/1447362/explain?concept=fundies%3ANetIncome&period=2020-12-31&surface=latest&period_type=duration&start=2020-01-01&unit=USD&dimensions= Input fundies:NetIncome: -10284000 USD (2020-01-01 to 2020-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000144736222000045/cstl-20211231.htm#1496011 Filing: 000144736222000045 The citation records this snapshot. The page link may show a newer release later.	USD 9.87 million Exact value Exact value: 9865000 USD 2020-01-01 – 2020-12-31: 9865000 USD Inspect Operating Cash Flow Open source Share or cite Citation for Operating Cash Flow · CASTLE BIOSCIENCES INC · 2020-12-31 CASTLE BIOSCIENCES INC (edgar:1447362) Operating Cash Flow: 9865000 USD Concept: fundies:OperatingCashFlow Period: 2020-01-01 to 2020-12-31 Values: Latest reported Published: 2026-11-02T09:03:37Z Snapshot: 9a17317dee912e8875124083fd2d038bbe46b2c4e51ea170e014978a5745ff01 Dimensions: Consolidated View: https://fundies.io/companies/edgar/1447362/explain?concept=fundies%3AOperatingCashFlow&period=2020-12-31&surface=latest&period_type=duration&start=2020-01-01&unit=USD&dimensions= Input fundies:OperatingCashFlow: 9865000 USD (2020-01-01 to 2020-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000144736222000045/cstl-20211231.htm#1536081 Filing: 000144736222000045 The citation records this snapshot. The page link may show a newer release later.	USD 4.75 million Exact value Exact value: 4751000 USD 2020-01-01 – 2020-12-31: 4751000 USD Inspect Capital Expenditure Open source Share or cite Citation for Capital Expenditure · CASTLE BIOSCIENCES INC · 2020-12-31 CASTLE BIOSCIENCES INC (edgar:1447362) Capital Expenditure: 4751000 USD Concept: fundies:CapitalExpenditure Period: 2020-01-01 to 2020-12-31 Values: Latest reported Published: 2026-11-02T09:03:37Z Snapshot: 9a17317dee912e8875124083fd2d038bbe46b2c4e51ea170e014978a5745ff01 Dimensions: Consolidated View: https://fundies.io/companies/edgar/1447362/explain?concept=fundies%3ACapitalExpenditure&period=2020-12-31&surface=latest&period_type=duration&start=2020-01-01&unit=USD&dimensions= Input fundies:CapitalExpenditure: 4751000 USD (2020-01-01 to 2020-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000144736222000045/cstl-20211231.htm#1539136 Filing: 000144736222000045 The citation records this snapshot. The page link may show a newer release later.	USD 5.11 million Calculation and evidence 9865000 − 4751000 USD Exact free cash flow: 5114000 USD 2020-01-01 – 2020-12-31: 9865000 USD · Inspect Operating Cash Flow · Source 2020-01-01 – 2020-12-31: 4751000 USD · Inspect Capital Expenditure · Source Share or cite Citation for Free cash flow · CASTLE BIOSCIENCES INC · 2020-12-31 CASTLE BIOSCIENCES INC (edgar:1447362) Free cash flow: 5114000 USD Concept: free-cash-flow Period: 2020-01-01 to 2020-12-31 Values: Latest reported Published: 2026-11-02T09:03:37Z Snapshot: 9a17317dee912e8875124083fd2d038bbe46b2c4e51ea170e014978a5745ff01 Dimensions: Consolidated View: https://fundies.io/companies/edgar/1447362?view=overview&cadence=annual&surface=latest#cash-generation-title Computed: Operating cash flow minus capital expenditure Input fundies:OperatingCashFlow: 9865000 USD (2020-01-01 to 2020-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000144736222000045/cstl-20211231.htm#1536081 Filing: 000144736222000045 Input fundies:CapitalExpenditure: 4751000 USD (2020-01-01 to 2020-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000144736222000045/cstl-20211231.htm#1539136 Filing: 000144736222000045 The citation records this snapshot. The page link may show a newer release later.
2021 2021-01-01 – 2021-12-31	−USD 31.29 million Exact value Exact value: -31292000 USD 2021-01-01 – 2021-12-31: -31292000 USD Inspect Net Income Open source Share or cite Citation for Net Income · CASTLE BIOSCIENCES INC · 2021-12-31 CASTLE BIOSCIENCES INC (edgar:1447362) Net Income: -31292000 USD Concept: fundies:NetIncome Period: 2021-01-01 to 2021-12-31 Values: Latest reported Published: 2026-11-02T09:03:37Z Snapshot: 9a17317dee912e8875124083fd2d038bbe46b2c4e51ea170e014978a5745ff01 Dimensions: Consolidated View: https://fundies.io/companies/edgar/1447362/explain?concept=fundies%3ANetIncome&period=2021-12-31&surface=latest&period_type=duration&start=2021-01-01&unit=USD&dimensions= Input fundies:NetIncome: -31292000 USD (2021-01-01 to 2021-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000144736223000038/cstl-20221231.htm#1600795 Filing: 000144736223000038 The citation records this snapshot. The page link may show a newer release later.	−USD 18.98 million Exact value Exact value: -18983000 USD 2021-01-01 – 2021-12-31: -18983000 USD Inspect Operating Cash Flow Open source Share or cite Citation for Operating Cash Flow · CASTLE BIOSCIENCES INC · 2021-12-31 CASTLE BIOSCIENCES INC (edgar:1447362) Operating Cash Flow: -18983000 USD Concept: fundies:OperatingCashFlow Period: 2021-01-01 to 2021-12-31 Values: Latest reported Published: 2026-11-02T09:03:37Z Snapshot: 9a17317dee912e8875124083fd2d038bbe46b2c4e51ea170e014978a5745ff01 Dimensions: Consolidated View: https://fundies.io/companies/edgar/1447362/explain?concept=fundies%3AOperatingCashFlow&period=2021-12-31&surface=latest&period_type=duration&start=2021-01-01&unit=USD&dimensions= Input fundies:OperatingCashFlow: -18983000 USD (2021-01-01 to 2021-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000144736223000038/cstl-20221231.htm#1640602 Filing: 000144736223000038 The citation records this snapshot. The page link may show a newer release later.	USD 3.48 million Exact value Exact value: 3483000 USD 2021-01-01 – 2021-12-31: 3483000 USD Inspect Capital Expenditure Open source Share or cite Citation for Capital Expenditure · CASTLE BIOSCIENCES INC · 2021-12-31 CASTLE BIOSCIENCES INC (edgar:1447362) Capital Expenditure: 3483000 USD Concept: fundies:CapitalExpenditure Period: 2021-01-01 to 2021-12-31 Values: Latest reported Published: 2026-11-02T09:03:37Z Snapshot: 9a17317dee912e8875124083fd2d038bbe46b2c4e51ea170e014978a5745ff01 Dimensions: Consolidated View: https://fundies.io/companies/edgar/1447362/explain?concept=fundies%3ACapitalExpenditure&period=2021-12-31&surface=latest&period_type=duration&start=2021-01-01&unit=USD&dimensions= Input fundies:CapitalExpenditure: 3483000 USD (2021-01-01 to 2021-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000144736223000038/cstl-20221231.htm#1643616 Filing: 000144736223000038 The citation records this snapshot. The page link may show a newer release later.	−USD 22.47 million Calculation and evidence -18983000 − 3483000 USD Exact free cash flow: -22466000 USD 2021-01-01 – 2021-12-31: -18983000 USD · Inspect Operating Cash Flow · Source 2021-01-01 – 2021-12-31: 3483000 USD · Inspect Capital Expenditure · Source Share or cite Citation for Free cash flow · CASTLE BIOSCIENCES INC · 2021-12-31 CASTLE BIOSCIENCES INC (edgar:1447362) Free cash flow: -22466000 USD Concept: free-cash-flow Period: 2021-01-01 to 2021-12-31 Values: Latest reported Published: 2026-11-02T09:03:37Z Snapshot: 9a17317dee912e8875124083fd2d038bbe46b2c4e51ea170e014978a5745ff01 Dimensions: Consolidated View: https://fundies.io/companies/edgar/1447362?view=overview&cadence=annual&surface=latest#cash-generation-title Computed: Operating cash flow minus capital expenditure Input fundies:OperatingCashFlow: -18983000 USD (2021-01-01 to 2021-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000144736223000038/cstl-20221231.htm#1640602 Filing: 000144736223000038 Input fundies:CapitalExpenditure: 3483000 USD (2021-01-01 to 2021-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000144736223000038/cstl-20221231.htm#1643616 Filing: 000144736223000038 The citation records this snapshot. The page link may show a newer release later.
2022 2022-01-01 – 2022-12-31	−USD 67.14 million Exact value Exact value: -67138000 USD 2022-01-01 – 2022-12-31: -67138000 USD Inspect Net Income Open source Share or cite Citation for Net Income · CASTLE BIOSCIENCES INC · 2022-12-31 CASTLE BIOSCIENCES INC (edgar:1447362) Net Income: -67138000 USD Concept: fundies:NetIncome Period: 2022-01-01 to 2022-12-31 Values: Latest reported Published: 2026-11-02T09:03:37Z Snapshot: 9a17317dee912e8875124083fd2d038bbe46b2c4e51ea170e014978a5745ff01 Dimensions: Consolidated View: https://fundies.io/companies/edgar/1447362/explain?concept=fundies%3ANetIncome&period=2022-12-31&surface=latest&period_type=duration&start=2022-01-01&unit=USD&dimensions= Input fundies:NetIncome: -67138000 USD (2022-01-01 to 2022-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000144736225000031/cstl-20241231.htm#1710069 Filing: 000144736225000031 The citation records this snapshot. The page link may show a newer release later.	−USD 41.66 million Exact value Exact value: -41655000 USD 2022-01-01 – 2022-12-31: -41655000 USD Inspect Operating Cash Flow Open source Share or cite Citation for Operating Cash Flow · CASTLE BIOSCIENCES INC · 2022-12-31 CASTLE BIOSCIENCES INC (edgar:1447362) Operating Cash Flow: -41655000 USD Concept: fundies:OperatingCashFlow Period: 2022-01-01 to 2022-12-31 Values: Latest reported Published: 2026-11-02T09:03:37Z Snapshot: 9a17317dee912e8875124083fd2d038bbe46b2c4e51ea170e014978a5745ff01 Dimensions: Consolidated View: https://fundies.io/companies/edgar/1447362/explain?concept=fundies%3AOperatingCashFlow&period=2022-12-31&surface=latest&period_type=duration&start=2022-01-01&unit=USD&dimensions= Input fundies:OperatingCashFlow: -41655000 USD (2022-01-01 to 2022-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000144736225000031/cstl-20241231.htm#1533927 Filing: 000144736225000031 The citation records this snapshot. The page link may show a newer release later.	USD 5.63 million Exact value Exact value: 5632000 USD 2022-01-01 – 2022-12-31: 5632000 USD Inspect Capital Expenditure Open source Share or cite Citation for Capital Expenditure · CASTLE BIOSCIENCES INC · 2022-12-31 CASTLE BIOSCIENCES INC (edgar:1447362) Capital Expenditure: 5632000 USD Concept: fundies:CapitalExpenditure Period: 2022-01-01 to 2022-12-31 Values: Latest reported Published: 2026-11-02T09:03:37Z Snapshot: 9a17317dee912e8875124083fd2d038bbe46b2c4e51ea170e014978a5745ff01 Dimensions: Consolidated View: https://fundies.io/companies/edgar/1447362/explain?concept=fundies%3ACapitalExpenditure&period=2022-12-31&surface=latest&period_type=duration&start=2022-01-01&unit=USD&dimensions= Input fundies:CapitalExpenditure: 5632000 USD (2022-01-01 to 2022-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000144736225000031/cstl-20241231.htm#1541027 Filing: 000144736225000031 The citation records this snapshot. The page link may show a newer release later.	−USD 47.29 million Calculation and evidence -41655000 − 5632000 USD Exact free cash flow: -47287000 USD 2022-01-01 – 2022-12-31: -41655000 USD · Inspect Operating Cash Flow · Source 2022-01-01 – 2022-12-31: 5632000 USD · Inspect Capital Expenditure · Source Share or cite Citation for Free cash flow · CASTLE BIOSCIENCES INC · 2022-12-31 CASTLE BIOSCIENCES INC (edgar:1447362) Free cash flow: -47287000 USD Concept: free-cash-flow Period: 2022-01-01 to 2022-12-31 Values: Latest reported Published: 2026-11-02T09:03:37Z Snapshot: 9a17317dee912e8875124083fd2d038bbe46b2c4e51ea170e014978a5745ff01 Dimensions: Consolidated View: https://fundies.io/companies/edgar/1447362?view=overview&cadence=annual&surface=latest#cash-generation-title Computed: Operating cash flow minus capital expenditure Input fundies:OperatingCashFlow: -41655000 USD (2022-01-01 to 2022-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000144736225000031/cstl-20241231.htm#1533927 Filing: 000144736225000031 Input fundies:CapitalExpenditure: 5632000 USD (2022-01-01 to 2022-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000144736225000031/cstl-20241231.htm#1541027 Filing: 000144736225000031 The citation records this snapshot. The page link may show a newer release later.
2023 2023-01-01 – 2023-12-31	−USD 57.47 million Exact value Exact value: -57466000 USD 2023-01-01 – 2023-12-31: -57466000 USD Inspect Net Income Open source Share or cite Citation for Net Income · CASTLE BIOSCIENCES INC · 2023-12-31 CASTLE BIOSCIENCES INC (edgar:1447362) Net Income: -57466000 USD Concept: fundies:NetIncome Period: 2023-01-01 to 2023-12-31 Values: Latest reported Published: 2026-11-02T09:03:37Z Snapshot: 9a17317dee912e8875124083fd2d038bbe46b2c4e51ea170e014978a5745ff01 Dimensions: Consolidated View: https://fundies.io/companies/edgar/1447362/explain?concept=fundies%3ANetIncome&period=2023-12-31&surface=latest&period_type=duration&start=2023-01-01&unit=USD&dimensions= Input fundies:NetIncome: -57466000 USD (2023-01-01 to 2023-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000162828026012272/cstl-20251231.htm#1728940 Filing: 000162828026012272 The citation records this snapshot. The page link may show a newer release later.	−USD 5.63 million Exact value Exact value: -5626000 USD 2023-01-01 – 2023-12-31: -5626000 USD Inspect Operating Cash Flow Open source Share or cite Citation for Operating Cash Flow · CASTLE BIOSCIENCES INC · 2023-12-31 CASTLE BIOSCIENCES INC (edgar:1447362) Operating Cash Flow: -5626000 USD Concept: fundies:OperatingCashFlow Period: 2023-01-01 to 2023-12-31 Values: Latest reported Published: 2026-11-02T09:03:37Z Snapshot: 9a17317dee912e8875124083fd2d038bbe46b2c4e51ea170e014978a5745ff01 Dimensions: Consolidated View: https://fundies.io/companies/edgar/1447362/explain?concept=fundies%3AOperatingCashFlow&period=2023-12-31&surface=latest&period_type=duration&start=2023-01-01&unit=USD&dimensions= Input fundies:OperatingCashFlow: -5626000 USD (2023-01-01 to 2023-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000162828026012272/cstl-20251231.htm#1540821 Filing: 000162828026012272 The citation records this snapshot. The page link may show a newer release later.	USD 13.62 million Exact value Exact value: 13621000 USD 2023-01-01 – 2023-12-31: 13621000 USD Inspect Capital Expenditure Open source Share or cite Citation for Capital Expenditure · CASTLE BIOSCIENCES INC · 2023-12-31 CASTLE BIOSCIENCES INC (edgar:1447362) Capital Expenditure: 13621000 USD Concept: fundies:CapitalExpenditure Period: 2023-01-01 to 2023-12-31 Values: Latest reported Published: 2026-11-02T09:03:37Z Snapshot: 9a17317dee912e8875124083fd2d038bbe46b2c4e51ea170e014978a5745ff01 Dimensions: Consolidated View: https://fundies.io/companies/edgar/1447362/explain?concept=fundies%3ACapitalExpenditure&period=2023-12-31&surface=latest&period_type=duration&start=2023-01-01&unit=USD&dimensions= Input fundies:CapitalExpenditure: 13621000 USD (2023-01-01 to 2023-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000162828026012272/cstl-20251231.htm#1555403 Filing: 000162828026012272 The citation records this snapshot. The page link may show a newer release later.	−USD 19.25 million Calculation and evidence -5626000 − 13621000 USD Exact free cash flow: -19247000 USD 2023-01-01 – 2023-12-31: -5626000 USD · Inspect Operating Cash Flow · Source 2023-01-01 – 2023-12-31: 13621000 USD · Inspect Capital Expenditure · Source Share or cite Citation for Free cash flow · CASTLE BIOSCIENCES INC · 2023-12-31 CASTLE BIOSCIENCES INC (edgar:1447362) Free cash flow: -19247000 USD Concept: free-cash-flow Period: 2023-01-01 to 2023-12-31 Values: Latest reported Published: 2026-11-02T09:03:37Z Snapshot: 9a17317dee912e8875124083fd2d038bbe46b2c4e51ea170e014978a5745ff01 Dimensions: Consolidated View: https://fundies.io/companies/edgar/1447362?view=overview&cadence=annual&surface=latest#cash-generation-title Computed: Operating cash flow minus capital expenditure Input fundies:OperatingCashFlow: -5626000 USD (2023-01-01 to 2023-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000162828026012272/cstl-20251231.htm#1540821 Filing: 000162828026012272 Input fundies:CapitalExpenditure: 13621000 USD (2023-01-01 to 2023-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000162828026012272/cstl-20251231.htm#1555403 Filing: 000162828026012272 The citation records this snapshot. The page link may show a newer release later.
2024 2024-01-01 – 2024-12-31	USD 18.25 million Exact value Exact value: 18245000 USD 2024-01-01 – 2024-12-31: 18245000 USD Inspect Net Income Open source Share or cite Citation for Net Income · CASTLE BIOSCIENCES INC · 2024-12-31 CASTLE BIOSCIENCES INC (edgar:1447362) Net Income: 18245000 USD Concept: fundies:NetIncome Period: 2024-01-01 to 2024-12-31 Values: Latest reported Published: 2026-11-02T09:03:37Z Snapshot: 9a17317dee912e8875124083fd2d038bbe46b2c4e51ea170e014978a5745ff01 Dimensions: Consolidated View: https://fundies.io/companies/edgar/1447362/explain?concept=fundies%3ANetIncome&period=2024-12-31&surface=latest&period_type=duration&start=2024-01-01&unit=USD&dimensions= Input fundies:NetIncome: 18245000 USD (2024-01-01 to 2024-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000162828026012272/cstl-20251231.htm#1728180 Filing: 000162828026012272 The citation records this snapshot. The page link may show a newer release later.	USD 64.87 million Exact value Exact value: 64866000 USD 2024-01-01 – 2024-12-31: 64866000 USD Inspect Operating Cash Flow Open source Share or cite Citation for Operating Cash Flow · CASTLE BIOSCIENCES INC · 2024-12-31 CASTLE BIOSCIENCES INC (edgar:1447362) Operating Cash Flow: 64866000 USD Concept: fundies:OperatingCashFlow Period: 2024-01-01 to 2024-12-31 Values: Latest reported Published: 2026-11-02T09:03:37Z Snapshot: 9a17317dee912e8875124083fd2d038bbe46b2c4e51ea170e014978a5745ff01 Dimensions: Consolidated View: https://fundies.io/companies/edgar/1447362/explain?concept=fundies%3AOperatingCashFlow&period=2024-12-31&surface=latest&period_type=duration&start=2024-01-01&unit=USD&dimensions= Input fundies:OperatingCashFlow: 64866000 USD (2024-01-01 to 2024-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000162828026012272/cstl-20251231.htm#1540178 Filing: 000162828026012272 The citation records this snapshot. The page link may show a newer release later.	USD 28.33 million Exact value Exact value: 28326000 USD 2024-01-01 – 2024-12-31: 28326000 USD Inspect Capital Expenditure Open source Share or cite Citation for Capital Expenditure · CASTLE BIOSCIENCES INC · 2024-12-31 CASTLE BIOSCIENCES INC (edgar:1447362) Capital Expenditure: 28326000 USD Concept: fundies:CapitalExpenditure Period: 2024-01-01 to 2024-12-31 Values: Latest reported Published: 2026-11-02T09:03:37Z Snapshot: 9a17317dee912e8875124083fd2d038bbe46b2c4e51ea170e014978a5745ff01 Dimensions: Consolidated View: https://fundies.io/companies/edgar/1447362/explain?concept=fundies%3ACapitalExpenditure&period=2024-12-31&surface=latest&period_type=duration&start=2024-01-01&unit=USD&dimensions= Input fundies:CapitalExpenditure: 28326000 USD (2024-01-01 to 2024-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000162828026012272/cstl-20251231.htm#1554817 Filing: 000162828026012272 The citation records this snapshot. The page link may show a newer release later.	USD 36.54 million Calculation and evidence 64866000 − 28326000 USD Exact free cash flow: 36540000 USD 2024-01-01 – 2024-12-31: 64866000 USD · Inspect Operating Cash Flow · Source 2024-01-01 – 2024-12-31: 28326000 USD · Inspect Capital Expenditure · Source Share or cite Citation for Free cash flow · CASTLE BIOSCIENCES INC · 2024-12-31 CASTLE BIOSCIENCES INC (edgar:1447362) Free cash flow: 36540000 USD Concept: free-cash-flow Period: 2024-01-01 to 2024-12-31 Values: Latest reported Published: 2026-11-02T09:03:37Z Snapshot: 9a17317dee912e8875124083fd2d038bbe46b2c4e51ea170e014978a5745ff01 Dimensions: Consolidated View: https://fundies.io/companies/edgar/1447362?view=overview&cadence=annual&surface=latest#cash-generation-title Computed: Operating cash flow minus capital expenditure Input fundies:OperatingCashFlow: 64866000 USD (2024-01-01 to 2024-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000162828026012272/cstl-20251231.htm#1540178 Filing: 000162828026012272 Input fundies:CapitalExpenditure: 28326000 USD (2024-01-01 to 2024-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000162828026012272/cstl-20251231.htm#1554817 Filing: 000162828026012272 The citation records this snapshot. The page link may show a newer release later.
2025 2025-01-01 – 2025-12-31	−USD 24.16 million Exact value Exact value: -24158000 USD 2025-01-01 – 2025-12-31: -24158000 USD Inspect Net Income Open source Share or cite Citation for Net Income · CASTLE BIOSCIENCES INC · 2025-12-31 CASTLE BIOSCIENCES INC (edgar:1447362) Net Income: -24158000 USD Concept: fundies:NetIncome Period: 2025-01-01 to 2025-12-31 Values: Latest reported Published: 2026-11-02T09:03:37Z Snapshot: 9a17317dee912e8875124083fd2d038bbe46b2c4e51ea170e014978a5745ff01 Dimensions: Consolidated View: https://fundies.io/companies/edgar/1447362/explain?concept=fundies%3ANetIncome&period=2025-12-31&surface=latest&period_type=duration&start=2025-01-01&unit=USD&dimensions= Input fundies:NetIncome: -24158000 USD (2025-01-01 to 2025-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000162828026012272/cstl-20251231.htm#1727418 Filing: 000162828026012272 The citation records this snapshot. The page link may show a newer release later.	USD 64.35 million Exact value Exact value: 64347000 USD 2025-01-01 – 2025-12-31: 64347000 USD Inspect Operating Cash Flow Open source Share or cite Citation for Operating Cash Flow · CASTLE BIOSCIENCES INC · 2025-12-31 CASTLE BIOSCIENCES INC (edgar:1447362) Operating Cash Flow: 64347000 USD Concept: fundies:OperatingCashFlow Period: 2025-01-01 to 2025-12-31 Values: Latest reported Published: 2026-11-02T09:03:37Z Snapshot: 9a17317dee912e8875124083fd2d038bbe46b2c4e51ea170e014978a5745ff01 Dimensions: Consolidated View: https://fundies.io/companies/edgar/1447362/explain?concept=fundies%3AOperatingCashFlow&period=2025-12-31&surface=latest&period_type=duration&start=2025-01-01&unit=USD&dimensions= Input fundies:OperatingCashFlow: 64347000 USD (2025-01-01 to 2025-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000162828026012272/cstl-20251231.htm#1539537 Filing: 000162828026012272 The citation records this snapshot. The page link may show a newer release later.	USD 36.02 million Exact value Exact value: 36021000 USD 2025-01-01 – 2025-12-31: 36021000 USD Inspect Capital Expenditure Open source Share or cite Citation for Capital Expenditure · CASTLE BIOSCIENCES INC · 2025-12-31 CASTLE BIOSCIENCES INC (edgar:1447362) Capital Expenditure: 36021000 USD Concept: fundies:CapitalExpenditure Period: 2025-01-01 to 2025-12-31 Values: Latest reported Published: 2026-11-02T09:03:37Z Snapshot: 9a17317dee912e8875124083fd2d038bbe46b2c4e51ea170e014978a5745ff01 Dimensions: Consolidated View: https://fundies.io/companies/edgar/1447362/explain?concept=fundies%3ACapitalExpenditure&period=2025-12-31&surface=latest&period_type=duration&start=2025-01-01&unit=USD&dimensions= Input fundies:CapitalExpenditure: 36021000 USD (2025-01-01 to 2025-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000162828026012272/cstl-20251231.htm#1554232 Filing: 000162828026012272 The citation records this snapshot. The page link may show a newer release later.	USD 28.33 million Calculation and evidence 64347000 − 36021000 USD Exact free cash flow: 28326000 USD 2025-01-01 – 2025-12-31: 64347000 USD · Inspect Operating Cash Flow · Source 2025-01-01 – 2025-12-31: 36021000 USD · Inspect Capital Expenditure · Source Share or cite Citation for Free cash flow · CASTLE BIOSCIENCES INC · 2025-12-31 CASTLE BIOSCIENCES INC (edgar:1447362) Free cash flow: 28326000 USD Concept: free-cash-flow Period: 2025-01-01 to 2025-12-31 Values: Latest reported Published: 2026-11-02T09:03:37Z Snapshot: 9a17317dee912e8875124083fd2d038bbe46b2c4e51ea170e014978a5745ff01 Dimensions: Consolidated View: https://fundies.io/companies/edgar/1447362?view=overview&cadence=annual&surface=latest#cash-generation-title Computed: Operating cash flow minus capital expenditure Input fundies:OperatingCashFlow: 64347000 USD (2025-01-01 to 2025-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000162828026012272/cstl-20251231.htm#1539537 Filing: 000162828026012272 Input fundies:CapitalExpenditure: 36021000 USD (2025-01-01 to 2025-12-31) Dimensions: Consolidated Source: https://www.sec.gov/Archives/edgar/data/1447362/000162828026012272/cstl-20251231.htm#1554232 Filing: 000162828026012272 The citation records this snapshot. The page link may show a newer release later.

Capital expenditure uses the canonical mapped positive-spending convention. A missing, ambiguous, incompatible, or negative-sign input is left blank. Values use the latest reported version.

Dataset coverage and company identifiers

Coverage reflects filings processed into this Fundies dataset; it does not imply every source filing is loaded.

34 filings · 2,511 latest values · 2,511 originally reported values

Dataset published 2026-11-02. Source filing dates and reporting periods are shown separately.

Identifiers: 0001447362, 1447362, CSTL, edgar:1447362

Also known as CASTLE BIOSCIENCES INC, CASTLE BIOSCIENCES, INC., Castle Biosciences, Inc.

CASTLE BIOSCIENCES INC

Latest quarter

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Operating margin

Operating cash flow

Free cash flow

Reported share-count change

Trailing twelve months

Revenue

Net income

Operating cash flow

Capital expenditure

Free cash flow

Company performance

What changed year over year

Revenue

Net income

Operating cash flow

Capital expenditure

Where revenue goes

2025 2025-01-01 – 2025-12-31

Cash

Share of revenue by period

Growth

Profit and cash

Balance sheet

Cash generation