CASTLE BIOSCIENCES INC — Director's Dealing 2021

Sep 16, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: CASTLE BIOSCIENCES INC (CSTL)
CIK: 0001447362
Period of Report: 2021-09-14

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-09-14	Common Stock	S	781	$73.359	Disposed	161852	Indirect
2021-09-14	Common Stock	S	472	$74.647	Disposed	161380	Indirect
2021-09-14	Common Stock	S	227	$75.691	Disposed	161153	Indirect
2021-09-14	Common Stock	S	186	$76.425	Disposed	160967	Indirect
2021-09-14	Common Stock	S	781	$73.359	Disposed	149251	Indirect
2021-09-14	Common Stock	S	473	$74.647	Disposed	148778	Indirect
2021-09-14	Common Stock	S	227	$75.691	Disposed	148551	Indirect
2021-09-14	Common Stock	S	186	$76.425	Disposed	148365	Indirect

Footnotes

F1: These transactions were made pursuant to a Rule 10b5-1 plan adopted by DJM Grantor Retained Annuity Trust No. 1, The Maetzold Descendants 2020 Trust, and the Derek Maetzold 2020 Irrevocable Trust on June 15, 2021.

F2: This transaction was executed in multiple trades at prices ranging from $73.050 to $73.940, 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: These transactions are a continuation of the transactions reported on a Form 4 filed contemporaneously herewith.

F4: 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.

F5: This transaction was executed in multiple trades at prices ranging from $74.100 to $75.070, 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.

F6: This transaction was executed in multiple trades at prices ranging from $75.105 to $76.070, 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.

F7: This transaction was executed in multiple trades at prices ranging from $76.300 to $76.630, 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.

F8: Held by Derek Maetzold 2020 Irrevocable Trust of which the Reporting Person is the trustee and his children are beneficiaries.