Kristen M. Oelschlager - 17 Dec 2025 Form 4 Insider Report for CASTLE BIOSCIENCES INC (CSTL)

Role
Chief Operating Officer
Signature
/s/ Frank Stokes, Attorney-in-fact
Issuer symbol
CSTL
Transactions as of
17 Dec 2025
Net transactions value
-$585,292
Form type
4
Filing time
19 Dec 2025, 16:06:19 UTC
Previous filing
11 Dec 2025
Next filing
14 Jan 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Oelschlager Kristen M Chief Operating Officer C/O CASTLE BIOSCIENCES, INC., 505 S FRIENDSWOOD DRIVE, SUITE 401, FRIENDSWOOD /s/ Frank Stokes, Attorney-in-fact 19 Dec 2025 0001856565

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction CSTL Common Stock Sale $585,292 -14,888 -55% $39.31 12,323 17 Dec 2025 Direct F1
holding CSTL Common Stock 97,251 17 Dec 2025 The Fritz Shorter Trust F2
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 This transaction was executed in multiple trades at prices ranging from $39.055 to 39.830, 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.
F2 Held by the Fritz Shorter Trust of which the Reporting Person and her spouse are the trustees and beneficiaries.