Frank Stokes - 08 Aug 2025 Form 4 Insider Report for CASTLE BIOSCIENCES INC (CSTL)

Reporting relationship: Chief Financial Officer
Issuer ticker: CSTL
Reported as of: 08 Aug 2025
Net transaction value: -$84,332
SEC form: 4
Accepted by SEC: 12 Aug 2025, 16:31:38 UTC
Prior SEC filing: 12 Jun 2025
Next SEC filing: 13 Nov 2025
Source filing: View source filing
Reporting owner signature: /s/ Frank Stokes, Attorney-in-fact

Key filing fact

Frank Stokes filed Form 4 for CASTLE BIOSCIENCES INC (CSTL) on 12 Aug 2025.

Key facts

This page summarizes Frank Stokes's Form 4 filing for CASTLE BIOSCIENCES INC (CSTL).
3 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 12 Aug 2025, 16:31.

Change

Previous filing in this sequence was filed on 12 Jun 2025.
Current net transaction value: -$84,332.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001782815 Primary reporting owner

Stokes Frank

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

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

CSTL transaction

Common Stock

Options Exercise

Transaction value: $0
Shares: +9,744
Change %: +22%
Price: $0.000000
Shares after: 53,072
Date: 08 Aug 2025
Ownership: Direct

CSTL transaction

Common Stock

Tax liability

Transaction value: $84,332
Shares: -4,356
Change %: -8.2%
Price: $19.36
Shares after: 48,716
Date: 08 Aug 2025
Ownership: Direct

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

CSTL transaction Derivative

Performance-Based Stock Unit

Options Exercise

Transaction value: $0
Shares: -9,744
Change %: -100%
Price: $0.000000
Shares after: 0
Date: 08 Aug 2025
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 9,744
Exercise price
Footnotes: F1

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 1 footnote

Footnote 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.