Company: CSTL
Filing Date: 2025-08-04
Form Type: 10-Q
Source: 0001447362-25-000097
Chunk: 192

Company: CASTLE BIOSCIENCES INC
Filing Date: 2025-08-04
Form: 10-Q
Item: Item 2
Chunk 192
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 due to higher personnel costs, higher lab services cost, and higher expenses for lab supplies. Increases in personnel costs reflect a higher headcount, due to additions made to support business growth in response to growing test report volumes, as well as merit and annual inflationary wage adjustment for existing employees. Higher expense for lab services and lab supplies also reflects higher test report volumes.

Due to the nature of our business, a significant portion of our cost of sales expenses represents fixed costs associated with our testing operations. Accordingly, our cost of sales expense will not necessarily increase or decrease commensurately with the change in net revenues from period to period. We expect our cost of sales expenses (exclusive of amortization of acquired intangible assets) to continue to increase in future periods as we hire additional laboratory personnel and related resources to support expected operational growth and higher test volumes.

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Gross Margin

Our gross margin percentage was 77.3% for the three months ended June 30, 2025, compared to 80.7% for the same period in 2024. The decrease was primarily due to lower ASP relating to our DecisionDx-SCC test and higher personnel costs and higher lab services expense.

Research and Development

Research and development expenses decreased by $1.3 million, or 9.5%, for the three months ended June 30, 2025, compared to the three months ended June 30, 2024, and primarily reflects lower expense for clinical trials and slightly lower personnel costs.

We expect to continue incurring research and development expenses through our continued investments in our ongoing pipeline initiatives and as we seek opportunities to build evidentiary support and new tests where commercial opportunities exist.

Selling, General and Administrative

The following table provides a breakdown of SG&A expenses (in thousands):

Three Months EndedJune 30,20252024Change(unaudited)Sales and marketing$35,123 $32,675 $2,448 General and administrative22,942 18,413 4,529 Total selling, general and administrative expense$58,065 $51,088 $6,977 

Sales and marketing expenses increased by $2.4 million, or 7.5%, for the three months ended June 30, 2025, compared to the three months ended June 30, 2024, primarily due to higher organizational and business development activities cost and higher sales related travel expense. Stock-based compensation expense included in sales and marketing was $3.