Company: CSTL
Filing Date: 2025-11-03
Form Type: 10-Q
Source: 0001628280-25-048254
Chunk: 4

Company: CASTLE BIOSCIENCES INC
Filing Date: 2025-11-03
Form: 10-Q
Item: Item 1
Chunk 4
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 — 1,737 — — 1,737 Net unrealized loss on marketable investment securities— — — — (99)(99)Net loss— — — (25,848)— (25,848)BALANCE, MARCH 31, 202528,844,937 $29 $666,120 $(225,974)$131 $440,306 Stock-based compensation expense— — 11,208 — — 11,208 Exercise of common stock options10,664 — 19 — — 19 Issuance of common stock from vested restricted stock units and payment of employees’ taxes125,550 — (588)— — (588)Net unrealized loss on marketable investment securities— — — — (92)(92)Net income— — — 4,523 — 4,523 BALANCE, JUNE 30, 202528,981,151 $29 $676,759 $(221,451)$39 $455,376 Stock-based compensation expense— — 12,100 — — 12,100 Exercise of common stock options4,000 — 77 — — 77 Issuance of common stock from vested restricted stock units, performance stock units and payment of employees’ taxes119,255 — (1,185)— — (1,185)Issuance of common stock under the employee stock purchase plan57,457 — 978 — — 978 Net unrealized gain on marketable investment securities— — — — 201 201 Net loss— — — (501)— (501)BALANCE, SEPTEMBER 30, 202529,161,863 $29 $688,729 $(221,952)$240 $467,046 

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.5

Table of ContentsCASTLE BIOSCIENCES, INC.CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS(UNAUDITED)(in thousands)

 Nine Months EndedSeptember 30, 20252024OPERATING ACTIVITIES  Net (loss) income$(21,826)$8,655 Adjustments to reconcile net (loss) income