CASTLE BIOSCIENCES INC — Director's Dealing 2021

Sep 2, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: CASTLE BIOSCIENCES INC (CSTL)
CIK: 0001447362
Period of Report: 2021-08-31

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-08-31	Common Stock	S	894	$73.977	Disposed	355124	Direct
2021-08-31	Common Stock	S	3139	$75.072	Disposed	351985	Direct
2021-08-31	Common Stock	S	5067	$76.196	Disposed	346918	Direct
2021-08-31	Common Stock	S	900	$76.86	Disposed	346018	Direct
2021-08-31	Common Stock	S	134	$74.054	Disposed	142994	Indirect
2021-08-31	Common Stock	S	500	$74.982	Disposed	142494	Indirect
2021-08-31	Common Stock	S	833	$76.199	Disposed	141661	Indirect
2021-08-31	Common Stock	S	200	$76.819	Disposed	141461	Indirect
2021-08-31	Common Stock	S	133	$74.054	Disposed	165834	Indirect
2021-08-31	Common Stock	S	500	$74.982	Disposed	165334	Indirect
2021-08-31	Common Stock	S	833	$76.199	Disposed	164501	Indirect
2021-08-31	Common Stock	S	201	$76.819	Disposed	164300	Indirect
2021-08-31	Common Stock	S	133	$74.054	Disposed	153232	Indirect
2021-08-31	Common Stock	S	500	$74.982	Disposed	152732	Indirect
2021-08-31	Common Stock	S	833	$76.199	Disposed	151899	Indirect
2021-08-31	Common Stock	S	200	$76.819	Disposed	151699	Indirect

Footnotes

F1: These transactions were made pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on December 11, 2020.

F2: This transaction was executed in multiple trades at prices ranging from $73.490 to $74.475, 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: This transaction was executed in multiple trades at prices ranging from $74.680 to $75.510, 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.

F4: This transaction was executed in multiple trades at prices ranging from $75.690 to $76.660, 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 $76.720 to $76.960, 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: 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.

F7: This transaction was executed in multiple trades at prices ranging from $73.540 to $74.475, 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 DJM Grantor Retained Annuity Trust No. 1 of which the Reporting Person is the trustee and beneficiary.

F9: This transaction was executed in multiple trades at prices ranging from $74.650 to $75.640, 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 $75.690 to $76.650, 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.

F11: This transaction was executed in multiple trades at prices ranging from $76.720 to $76.910, 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.

F12: 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.

F13: Held by Derek Maetzold 2020 Irrevocable Trust of which the Reporting Person is the trustee and his children are beneficiaries.