CASTLE BIOSCIENCES INC — Director's Dealing 2021

Dec 15, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: CASTLE BIOSCIENCES INC (CSTL)
CIK: 0001447362
Period of Report: 2021-12-10

Reporting Person: Stokes Frank (Chief Financial Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-12-10	Common Stock	M	2000	—	Acquired	8225	Direct
2021-12-10	Common Stock	F	895	$40.52	Disposed	7330	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-12-10	Stock option (right to buy)	$40.52	A	42550	Acquired	2031-12-09	Common Stock (42550.0)	Direct
2021-12-10	Restricted Stock Units	$	A	24679	Acquired		Common Stock (24679.0)	Direct
2021-12-10	Restricted Stock Units	$	M	2000	Disposed		Common Stock (2000.0)	Direct

Footnotes

F1: Each Restricted Stock Unit ("RSU") represents the right to receive one share of the Issuer's Common Stock.

F2: Includes 305 shares acquired on August 31, 2021, under the Issuer's employee stock purchase plan.

F3: 25% of the shares shall vest on December 10, 2022, and the remaining shares shall vest in 36 equal monthly installments thereafter.

F4: The RSUs vest in four equal annual installments beginning on December 10, 2022.

F5: On December 10, 2020, the Reporting Person was granted 8,000 RSUs, which vest in four equal annual installments beginning on December 10, 2021.