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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	Director	Officer	Large Shareholder	Other
1435183	Garheng Kong	C/O Healthquest 1301 Shoreway Road, Suite 350 Belmont CA 94002	No	No	Yes	No
1579382	Sofinnova Healthquest Partners, L.p.	C/O Healthquest 1301 Shoreway Road, Suite 350 Belmont CA 94002	No	No	Yes	No
1783696	Healthquest Venture Management, L.l.c.	C/O Healthquest 1301 Shoreway Road, Suite 350 Belmont CA 94002	No	No	Yes	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	2020-05-12	250,000	$34.50	1,433,577	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Direct

Footnotes

The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by Sofinnova Healthquest Partners, L.P. on December 17, 2019.
Represents the weighted-average sale price per share of a series of transactions, all of which were executed on May 12, 2020. The actual sale prices ranged from a low of $33.034 to a high of $35.665, inclusive. Each Reporting Person undertakes to provide upon request of the SEC Staff, Castle Biosciences, Inc. or a Castle Biosciences, Inc. security holder full information regarding the number of shares sold at each price within the range.
The shares are directly held by Sofinnova HealthQuest Partners, L.P. ("HealthQuest"). HealthQuest Venture Management, L.L.C. ("HQVM"), the general partner of HealthQuest, and Garheng Kong, the managing member of HQVM, may be deemed to have sole voting and dispositive power with respect to the shares held of record by HealthQuest. Mr. Kong and HQVM disclaim beneficial ownership over all shares owned by HealthQuest except to the extent of any pecuniary interest therein.