CASTLE BIOSCIENCES INC — Director's Dealing 2021

Aug 31, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: CASTLE BIOSCIENCES INC (CSTL)
CIK: 0001447362
Period of Report: 2021-08-27

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-08-27	Common Stock	S	1500	$73.621	Disposed	374518	Direct
2021-08-27	Common Stock	S	8100	$74.105	Disposed	366418	Direct
2021-08-27	Common Stock	S	400	$74.872	Disposed	366018	Direct
2021-08-27	Common Stock	S	1600	$73.995	Disposed	144861	Indirect
2021-08-27	Common Stock	S	66	$74.651	Disposed	144795	Indirect
2021-08-27	Common Stock	S	1600	$73.995	Disposed	167700	Indirect
2021-08-27	Common Stock	S	67	$74.651	Disposed	167633	Indirect
2021-08-27	Common Stock	S	1600	$73.995	Disposed	155099	Indirect
2021-08-27	Common Stock	S	67	$74.651	Disposed	155032	Indirect
2021-08-30	Common Stock	S	7000	$74.306	Disposed	359018	Direct
2021-08-30	Common Stock	S	2000	$75.19	Disposed	357018	Direct
2021-08-30	Common Stock	S	1000	$76.027	Disposed	356018	Direct
2021-08-30	Common Stock	S	1243	$74.273	Disposed	143552	Indirect
2021-08-30	Common Stock	S	291	$75.237	Disposed	143261	Indirect
2021-08-30	Common Stock	S	133	$76.101	Disposed	143128	Indirect
2021-08-30	Common Stock	S	1243	$74.273	Disposed	166390	Indirect
2021-08-30	Common Stock	S	290	$75.237	Disposed	166100	Indirect
2021-08-30	Common Stock	S	133	$76.101	Disposed	165967	Indirect
2021-08-30	Common Stock	S	1243	$74.273	Disposed	153789	Indirect
2021-08-30	Common Stock	S	290	$75.237	Disposed	153499	Indirect
2021-08-30	Common Stock	S	134	$76.101	Disposed	153365	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 $72.830 to $73.820, 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 $73.830 to $74.790, 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 $74.830 to $75.000, 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: 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.

F6: This transaction was executed in multiple trades at prices ranging from $73.620 to $74.460, 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 DJM Grantor Retained Annuity Trust No. 1 of which the Reporting Person is the trustee and beneficiary.

F8: This transaction was executed in multiple trades at prices ranging from $74.650 to $74.660, 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.

F9: 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.

F10: Held by Derek Maetzold 2020 Irrevocable Trust of which the Reporting Person is the trustee and his children are beneficiaries.

F11: This transaction was executed in multiple trades at prices ranging from $73.580 to $74.560, 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: This transaction was executed in multiple trades at prices ranging from $74.840 to $75.810, 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.

F13: This transaction was executed in multiple trades at prices ranging from $75.870 to $76.270, 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.

F14: This transaction was executed in multiple trades at prices ranging from $76.040 to $76.155, 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.