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$CSTL All transactions

CASTLE BIOSCIENCES INC

M 10b5-1 Plan

$ Value

Shares

24,146

Price

Filed

Mar 5

Insider

Name

Stokes Frank

Title

Chief Financial Officer

CIK

0001782815

Roles

Officer

Transaction Details

Transaction Date

2026-03-04

Code

M

Table

Non-Derivative

Ownership

Direct

Equity Swap

No

Shares After

73,018

Footnotes

The transaction on this Form 4 was made pursuant to a Rule 10b5-1 plan adopted by Frank Stokes on November 13, 2025. | This transaction was executed in multiple trades at prices ranging from $26.70 to $27.67, 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. | Includes 1,033 shares acquired on February 27, 2026, under the Issuer's employee stock purchase plan. | This transaction was executed in multiple trades at prices ranging from $27.72 to $27.97, 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. | Reflects the withholding of shares of the Issuer's common stock to satisfy tax withholding obligations in connection with the delivery of vested performance stock units reported on January 12, 2026. | Each Restricted Stock Unit ("RSU") represents the right to receive one share of the Issuer's Common Stock. | The RSU's vest in four equal annual installments beginning on March 03, 2027. | On March 4, 2024, the Reporting Person was granted 48,744 RSUs which vest in four equal installments beginning on March 4, 2025. | On March 4, 2025, the Reporting Person was granted 47,838 RSUs which vest in four equal installments beginning on March 4, 2026. | The shares subject to the option are fully vested.

Filing Info

Accession No.

0001628280-26-015334

Form Type

4

Issuer CIK

0001447362

Stokes Frank's History

Date Ticker Type Value
2026-03-05 CSTL $168K
2026-03-04 CSTL M
2026-03-04 CSTL F $302K
2026-03-04 CSTL M $13K
2026-03-04 CSTL M $0
2026-03-04 CSTL M $0
2026-03-04 CSTL M $0
2026-03-03 CSTL $145K
2026-03-03 CSTL $47K
2026-03-03 CSTL F $100K

Other Insiders at CSTL (90d)

Insider Bought Sold Last
MAETZOLD DEREK J
Pres. & Chief Exec. Officer
$2.5M 2026-04-21
Cole G Bradley $211K 2026-03-05
Stokes Frank
Chief Financial Officer
$360K 2026-03-05
Juvenal Tobin W
Chief Commercial Officer
$527K 2026-03-12
Oelschlager Kristen M
Chief Operating Officer
2026-03-04
Cotton Rodney 2026-03-26