Company: CSTL
Filing Date: 2025-08-04
Form Type: 10-Q
Source: 0001447362-25-000097
Chunk: 124

Company: CASTLE BIOSCIENCES INC
Filing Date: 2025-08-04
Form: 10-Q
Item: Item 8
Chunk 124
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RemainingContractualTerm (Years)AggregateIntrinsicValue(in thousands)Balance as of December 31, 20242,989,763 $36.23 Granted— $— Exercised(16,995)$2.16 Forfeited/Cancelled(60,225)$43.98 Balance as of June 30, 20252,912,543 $36.27 5.1$7,583 Exercisable at June 30, 20252,834,588 $36.17 5.0$7,583 Restricted Stock UnitsThe following table summarizes our RSU activity for the six months ended June 30, 2025:Restricted Stock Units OutstandingWeighted-Average Grant Date Fair ValueBalance as of December 31, 20243,196,224 $23.52 Granted1,508,158 $21.18 Vested(1)(520,157)$22.74 Forfeited/Cancelled(159,905)$23.48 Balance as of June 30, 20254,024,320$22.75 (1)The aggregate number of shares withheld upon vesting for employee tax obligations was 142,637 for the six months ended June 30, 2025.

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Table of ContentsCASTLE BIOSCIENCES, INC.NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (Continued)(UNAUDITED)

Performance-Based Restricted Stock UnitsThe following table summarizes our PSU activity for the six months ended June 30, 2025:Performance-Based Restricted Stock Units OutstandingWeighted-Average Grant Date Fair ValueBalance as of December 31, 2024275,528 $21.94 Granted172,631 $22.23 Vested— $— Forfeited/Cancelled— $— Balance as of June 30, 2025448,159$22.05 Employee Stock Purchase PlanThe ESPP provides for certain automatic increases in the number of shares of common stock reserved for issuance, which resulted in an additional 284,831 shares becoming available under the ESPP effective January 1, 2025. During the six months ended June 30, 2025, we issued 103,441 shares of common stock pursuant to scheduled purchases under the ESPP. As of June 30, 2025, 1,228,070 shares remained available for issuance under