What is Castle Biosciences's interest expense?

Castle Biosciences (CSTL) reported interest expense of $134K in Q1 2026.

How has Castle Biosciences's interest expense changed year-over-year?

Castle Biosciences's interest expense increased by 688.2% year-over-year, from $17K to $134K.

What is the long-term trend for Castle Biosciences's interest expense?

Over 4 years (2021 to 2025), Castle Biosciences's interest expense has grown at a 204.5% compound annual growth rate (CAGR), from $1K to $86K.

What does interest expense mean?

Cost of borrowing — interest paid or accrued on bonds, bank loans, credit facilities, finance leases, and other debt obligations.

Castle Biosciences CSTL Interest Expense

Interest Expense at other companies

Labcorp HoldingsLH

$55.1M-1.6%

Personalis, Inc.PSNL

$47K+67.9%

NeoGenomicsNEO

$598K-63.0%

Fulgent Genetics, Inc.FLGT

$17K+21.4%

Cogent Biosciences, Inc.COGT

$1.21M—

GeneDx HoldingsWGS

-$717K-12.0%

Segments

By segment

See full

Reportable Segment$134K+688%

Other financials

Income statement

See full

Revenue$83.7M-4.9%

Gross profit$63.1M-11.8%

Operating income-$18.4M+34.1%

Net income-$14.5M+43.8%

EPS (diluted)-$0.49+45.6%

Balance sheet

See full

Cash & equivalents$63.8M-28.9%

Total debt$36.7M+42.1%

Total equity$461.4M+4.8%

Total assets$547.8M+9.2%

Cash flow

See full

Operating cash flow-$22.1M-267%

CapEx$12.5M+163%

Free cash flow-$34.6M-221%

Valuation

See full

Market cap$694.86M+29.9%

Enterprise value$667.82M+41.8%

P/S2×+0.5×

Profitability

See full

Gross margin77.9%-4.1pp

Operating margin-9.8%-30.8pp

Net margin-3.8%-10.2pp

FCF margin1.3%-10.7pp

Returns & leverage

See full

Return on equity-2.8%-10.6pp

Debt / equity0.1×0.0×

Current ratio6.7×-2.6×

Where this comes from

Reported directly by Castle Biosciences in its filing.

Tagged under the XBRL concept us-gaap:InterestExpenseNonoperating.

The official record: Castle Biosciences’s 10-Q, filed May 6, 2026, on SEC EDGAR. View the filing →

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Questions, answered.

What is Castle Biosciences's interest expense?: Castle Biosciences (CSTL) reported interest expense of $134K in Q1 2026.
How has Castle Biosciences's interest expense changed year-over-year?: Castle Biosciences's interest expense increased by 688.2% year-over-year, from $17K to $134K.
What is the long-term trend for Castle Biosciences's interest expense?: Over 4 years (2021 to 2025), Castle Biosciences's interest expense has grown at a 204.5% compound annual growth rate (CAGR), from $1K to $86K.
What does interest expense mean?: Cost of borrowing — interest paid or accrued on bonds, bank loans, credit facilities, finance leases, and other debt obligations.