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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1447362	Castle Biosciences Inc	CSTL	Pharmaceutical Preparations (2834)	CA

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1024008	S David Kabakoff	C/O Castle Biosciences, Inc. 820 S. Friendswood Drive, Suite 201 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	2021-03-19	10,000	$66.17	743,577	No	4	S	Indirect	By L.P.
Common Stock	Disposition	2021-03-22	10,000	$67.12	733,577	No	4	S	Indirect	By L.P.

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Indirect	By L.P.
No	4	S	Indirect	By L.P.

Footnotes

The transaction on this Form 4 was made pursuant to a Rule 10b5-1 plan adopted by Sofinnova HealthQuest Partners, L.P. on December 17, 2020.
Held by Sofinnova HealthQuest Partners, L.P., or HealthQuest Partners. HealthQuest Venture Management, L.L.C., or HealthQuest Management, is the general partner of HealthQuest Partners. David Kabakoff, Ph.D., the Reporting Person, is a partner of HealthQuest Management. Garheng Kong is the managing member of HealthQuest Management and has sole voting and investment power over the shares held by HealthQuest Partners. Each of HealthQuest Management, Mr. Kong and Dr. Kabakoff disclaims beneficial ownership over all shares held by HealthQuest Partners except to the extent of any pecuniary interest therein.