Oelschlager Kristen M 4

4 · CASTLE BIOSCIENCES INC · Filed Mar 5, 2026

Form 4

Period: 2026-03-03

Chief Operating Officer

Transactions

Tax Payment
Common Stock
[F1][F2]
2026-03-03$27.57/sh−2,427$66,912→ 20,068 total
Exercise/Conversion
Common Stock
[F3]
2026-03-04+25,771→ 45,839 total
Tax Payment
Common Stock
2026-03-04$28.17/sh−6,792$191,331→ 39,047 total
Award
Restricted Stock Units
[F3][F5]
2026-03-03+48,367→ 48,367 total
→ Common Stock (48,367 underlying)
Exercise/Conversion
Restricted Stock Units
[F3][F6]
2026-03-04−13,811→ 27,621 total
→ Common Stock (13,811 underlying)
Exercise/Conversion
Restricted Stock Units
[F3][F7]
2026-03-04−11,960→ 35,878 total
→ Common Stock (11,960 underlying)

Holdings

Footnotes (7)

[F1]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.
[F2]Includes 965 shares acquired on February 27, 2026, under the Issuer's employee stock purchase plan.
[F3]Each Restricted Stock Unit ("RSU") represents the right to receive one share of the Issuer's Common Stock.
[F4]Held by the Fritz Shorter Trust of which the Reporting Person and her spouse are the trustees and beneficiaries.
[F5]The RSU's vest in four equal annual installments beginning on March 03, 2027.
[F6]On March 4, 2024, the Reporting Person was granted 55,243 RSUs which vest in four equal installments beginning on March 4, 2025.
[F7]On March 4, 2025, the Reporting Person was granted 47,838 RSUs which vest in four equal installments beginning on March 4, 2026.

Signature

/s/ Frank Stokes, Attorney-in-fact|2025-03-05

Documents

1 file