CASTLE BIOSCIENCES INC — Director's Dealing 2021

Jan 13, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: CASTLE BIOSCIENCES INC (CSTL)
CIK: 0001447362
Period of Report: 2021-01-11

Reporting Person: Stokes Frank (Chief Financial Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-01-11	Common Stock	M	7500	$2.39	Acquired	11386	Direct
2021-01-11	Common Stock	S	1300	$77.35	Disposed	10086	Direct
2021-01-11	Common Stock	S	6000	$78.17	Disposed	4086	Direct
2021-01-11	Common Stock	S	200	$79.258	Disposed	3886	Direct
2021-01-12	Common Stock	M	7500	$2.39	Acquired	11386	Direct
2021-01-12	Common Stock	S	1500	$77.024	Disposed	9886	Direct
2021-01-12	Common Stock	S	4900	$78.291	Disposed	4986	Direct
2021-01-12	Common Stock	S	1100	$78.984	Disposed	3886	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-01-11	Stock option (right to buy)	$2.39	M	7500	Disposed	2028-05-09	Common Stock (7500.0)	Direct
2021-01-12	Stock option (right to buy)	$2.39	M	7500	Disposed	2028-05-09	Common Stock (7500.0)	Direct

Footnotes

F1: These transactions were made pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on December 6, 2020.

F2: This transaction was executed in multiple trades at prices ranging from $76.950 to $77.790, 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.

F3: This transaction was executed in multiple trades at prices ranging from $78.000 to $78.600, 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 $79.255 to $79.260, 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 $76.625 to $77.310, 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: This transaction was executed in multiple trades at prices ranging from $77.770 to $78.730, 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: This transaction was executed in multiple trades at prices ranging from $78.850 to $79.155, 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.

F8: The option is exercisable immediately, in whole or in part, conditioned upon the Reporting Person entering into a restricted stock purchase agreement with respect to any unvested shares. 25% of the 133,137 shares originally subject to the option vested on December 4, 2018, and the remaining shares vest in 36 equal monthly installments thereafter.