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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1447362	Castle Biosciences Inc	CSTL	()	4

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1236397	Daniel Bradbury	C/O Castle Biosciences, Inc. 505 S. Friendswood Drive, Suite 401 Friendswood TX 77546		Yes	No	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Disposition	2023-11-20	3,451	$20.04	97,854	No	4	S	Indirect	By LLC
Common Stock	Disposition	2023-11-20	1,152	$20.04	63,885	No	4	S	Indirect	By Daniel Bradbury Irrecovable Descendant's Trust
Common Stock	Disposition	2023-11-20	1,152	$20.04	63,910	No	4	S	Indirect	By Annette Bradbury Irrecovable Descendant's Trust
Common Stock	Disposition	2023-11-21	180	$20.00	97,674	No	4	S	Indirect	By LLC
Common Stock	Disposition	2023-11-21	60	$20.00	63,825	No	4	S	Indirect	By Daniel Bradbury Irrecovable Descendant's Trust
Common Stock	Disposition	2023-11-21	60	$20.00	63,850	No	4	S	Indirect	By Annette Bradbury Irrecovable Descendant's Trust

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Indirect	By LLC
No	4	S	Indirect	By Daniel Bradbury Irrecovable Descendant's Trust
No	4	S	Indirect	By Annette Bradbury Irrecovable Descendant's Trust
No	4	S	Indirect	By LLC
No	4	S	Indirect	By Daniel Bradbury Irrecovable Descendant's Trust
No	4	S	Indirect	By Annette Bradbury Irrecovable Descendant's Trust

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	4,655	Direct

Footnotes

The transaction on this Form 4 was made pursuant to a Rule 10b5-1 plan adopted by BioBrit, LLC, The Daniel M. Bradbury Irrevocable Descendants' Trust and The Annette E. Bradbury Irrevocable Descendants' Trust on November 23, 2022.
This transaction was executed in multiple trades at prices ranging from $20.00 to $20.11, 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.
Held by BioBrit, LLC, of which the Reporting Person is the managing member and has voting and investment power over the shares.
Held by Daniel Bradbury Irrecovable Descendant's Trust of which the reporting person and his spouse are trustees and their children are beneficiaries.
Held by Annette Bradbury Irrecovable Descendant's Trust of which the reporting person and his spouse are trustees and their children are beneficiaries.