Company: CSTL
Filing Date: 2025-08-04
Form Type: 10-Q
Source: 0001447362-25-000097
Chunk: 114

Company: CASTLE BIOSCIENCES INC
Filing Date: 2025-08-04
Form: 10-Q
Item: Item 8
Chunk 114
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 common shares outstanding, diluted29,545 28,738 28,763 28,542 Earnings (loss) per share:Basic$0.16 $0.32 $(0.74)$0.23 Diluted$0.15 $0.31 $(0.74)$0.22 Due to the Company reporting a net loss attributable to common stockholders for the six months ended June 30, 2025, all potentially dilutive securities are antidilutive and are excluded from the computations of diluted loss per share.The table below provides the weighted-average number of potential common shares associated with outstanding securities not included in our calculation of diluted earnings (loss) per share for the three and six months ended June 30, 2025 and 2024 because to do so would be antidilutive. With regard to the PSUs, we assume that the associated performance targets will be met at the target level of performance for purposes of calculating diluted earnings per common share until such time that it is probable that actual performance will be above or below target (in thousands): Three Months EndedJune 30,Six Months EndedJune 30,2025202420252024Stock options2,466 2,487 2,965 2,493 RSUs and PSUs2,958 892 4,053 877 ESPP123 216 150 233 Total5,547 3,595 7,168 3,603 

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

5. Marketable Investment Securities 

Marketable investment securities consisted of the following (in thousands):June 30, 2025December 31, 2024Current marketable investment securities:Trading securities$3,315 $3,555 Debt securities - AFS184,805 169,866 Debt securities - HTM(1)5,577 — Total current marketable investment securities$193,697 $173,421 (1)  We held no debt securities - HTM as of December 31, 2024.Trading securitiesWe recognized unrealized gains of $1.2 million and unrealized losses of $0.2 million in our trading securities for the three and six months ended June 30, 2025, respectively. No gains or losses were recognized for