CASTLE BIOSCIENCES INC — Director's Dealing 2021

Nov 18, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: CASTLE BIOSCIENCES INC (CSTL)
CIK: 0001447362
Period of Report: 2021-11-15

Reporting Person: MAETZOLD DEREK J (Director, Pres. & Chief Exec. Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-11-15	Common Stock	M	16406	$2.36	Acquired	302424	Direct
2021-11-15	Common Stock	S	15394	$52.474	Disposed	287030	Direct
2021-11-15	Common Stock	S	1012	$53.042	Disposed	286018	Direct
2021-11-16	Common Stock	M	15409	$3.72	Acquired	301427	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-11-15	Stock option (right to buy)	$2.36	M	16406	Disposed	2022-07-20	Common Stock (16406.0)	Direct
2021-11-16	Stock option (right to buy)	$3.72	M	15409	Disposed	2024-03-26	Common Stock (15409.0)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	150567	Indirect
Common Stock	127728	Indirect
Common Stock	137965	Indirect

Footnotes

F1: This transaction was executed in multiple trades at prices ranging from $52.000 to $52.995, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

F2: This transaction was executed in multiple trades at prices ranging from $53.000 to $53.170, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

F3: Held by The Maetzold Descendants 2020 Trust of which the Reporting Person's spouse is the trustee and the Reporting Person's spouse and their children are beneficiaries.

F4: Held by DJM Grantor Retained Annuity Trust No. 1 of which the Reporting Person is the trustee and beneficiary.

F5: Held by Derek Maetzold 2020 Irrevocable Trust of which the Reporting Person is the trustee and his children are beneficiaries.

F6: The shares subject to the option are fully vested.