Frank Stokes - Aug 8, 2025 Form 4 Insider Report for CASTLE BIOSCIENCES INC (CSTL)

Role
Chief Financial Officer
Signature
/s/ Frank Stokes, Attorney-in-fact
Stock symbol
CSTL
Transactions as of
Aug 8, 2025
Transactions value $
-$84,332
Form type
4
Date filed
8/12/2025, 04:31 PM
Previous filing
Jun 12, 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Stokes Frank Chief Financial Officer C/O CASTLE BIOSCIENCES, INC., 505 S. FRIENDSWOOD DRIVE, SUITE 401, FRIENDSWOOD /s/ Frank Stokes, Attorney-in-fact 2025-08-12 0001782815

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction CSTL Common Stock Options Exercise $0 +9.74K +22.49% $0.00 53.1K Aug 8, 2025 Direct
transaction CSTL Common Stock Tax liability -$84.3K -4.36K -8.21% $19.36 48.7K Aug 8, 2025 Direct

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction CSTL Performance-Based Stock Unit Options Exercise $0 -9.74K -100% $0.00 0 Aug 8, 2025 Common Stock 9.74K Direct F1
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Each Performance-Based Stock Unit ("PSU") represents the right to receive one share of the Issuer's Common Stock. These PSUs represent the remaining 50% of the PSUs granted on December 23, 2022, which were all subject to time-based vesting and vested in full on the one-year anniversary of August 9, 2024.