CASTLE BIOSCIENCES INC — Director's Dealing 2021

Oct 6, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: CASTLE BIOSCIENCES INC (CSTL)
CIK: 0001447362
Period of Report: 2021-10-04

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-10-04	Common Stock	S	496	$60.255	Disposed	133465	Indirect
2021-10-04	Common Stock	S	169	$60.875	Disposed	133296	Indirect
2021-10-04	Common Stock	S	101	$62.376	Disposed	133195	Indirect
2021-10-04	Common Stock	S	67	$62.89	Disposed	133128	Indirect
2021-10-04	Common Stock	S	497	$60.255	Disposed	156303	Indirect
2021-10-04	Common Stock	S	168	$60.875	Disposed	156135	Indirect
2021-10-04	Common Stock	S	102	$62.376	Disposed	156033	Indirect
2021-10-04	Common Stock	S	66	$62.89	Disposed	155967	Indirect
2021-10-04	Common Stock	S	497	$60.255	Disposed	143702	Indirect
2021-10-04	Common Stock	S	168	$60.875	Disposed	143534	Indirect
2021-10-04	Common Stock	S	102	$62.376	Disposed	143432	Indirect
2021-10-04	Common Stock	S	67	$62.89	Disposed	143365	Indirect
2021-10-05	Common Stock	S	300	$62.045	Disposed	132828	Indirect
2021-10-05	Common Stock	S	534	$62.809	Disposed	132294	Indirect
2021-10-05	Common Stock	S	300	$62.045	Disposed	155667	Indirect
2021-10-05	Common Stock	S	533	$62.809	Disposed	155134	Indirect
2021-10-05	Common Stock	S	300	$62.045	Disposed	143065	Indirect
2021-10-05	Common Stock	S	533	$62.809	Disposed	142532	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 $59.660 to $60.555, 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 $60.710 to $61.680, 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 $61.720 to $62.700, 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 $62.870 to $62.910, 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: 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.

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

F9: This transaction was executed in multiple trades at prices ranging from $61.440 to $62.430, 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.

F10: This transaction was executed in multiple trades at prices ranging from $62.500 to $63.145, 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.