CASTLE BIOSCIENCES INC — Director's Dealing 2021

Oct 21, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: CASTLE BIOSCIENCES INC (CSTL)
CIK: 0001447362
Period of Report: 2021-10-19

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-10-19	Common Stock	S	133	$66.132	Disposed	131328	Indirect
2021-10-19	Common Stock	S	300	$67.066	Disposed	131028	Indirect
2021-10-19	Common Stock	S	400	$67.804	Disposed	130628	Indirect
2021-10-19	Common Stock	S	133	$66.132	Disposed	154167	Indirect
2021-10-19	Common Stock	S	300	$67.066	Disposed	153867	Indirect
2021-10-19	Common Stock	S	400	$67.804	Disposed	153467	Indirect
2021-10-19	Common Stock	S	134	$66.132	Disposed	141565	Indirect
2021-10-19	Common Stock	S	300	$67.066	Disposed	141265	Indirect
2021-10-19	Common Stock	S	400	$67.804	Disposed	140865	Indirect
2021-10-20	Common Stock	S	700	$65.04	Disposed	129928	Indirect
2021-10-20	Common Stock	S	134	$66.051	Disposed	129794	Indirect
2021-10-20	Common Stock	S	700	$65.04	Disposed	152767	Indirect
2021-10-20	Common Stock	S	133	$66.051	Disposed	152634	Indirect
2021-10-20	Common Stock	S	700	$65.04	Disposed	140165	Indirect
2021-10-20	Common Stock	S	133	$66.051	Disposed	140032	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	286018	Direct

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 $65.530 to $66.480, 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 DJM Grantor Retained Annuity Trust No. 1 of which the Reporting Person is the trustee and beneficiary.

F4: This transaction was executed in multiple trades at prices ranging from $66.580 to $67.510, 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.

F5: This transaction was executed in multiple trades at prices ranging from $67.590 to $68.385, 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: 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.

F7: Held by Derek Maetzold 2020 Irrevocable Trust of which the Reporting Person is the trustee and his children are beneficiaries.

F8: This transaction was executed in multiple trades at prices ranging from $64.650 to $65.530, 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.

F9: This transaction was executed in multiple trades at prices ranging from $65.650 to $66.580, 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.