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Juvenal Tobin W

Disclosed activity across 1 company

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360
SEC CIK
0001856542

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Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
CASTLE BIOSCIENCES INCCSTL · Entity 359Chief Commercial OfficerOctober 12, 2026October 14, 2026

Disclosed balances

About these balances

Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.

CASTLE BIOSCIENCES INC

Report date October 12, 2026 · Filed October 14, 2026

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect48,719 Reported balance After 2026-10-12 transaction · row 1
1 source row

Row 1 · 2026-10-12 · Sale · Disposed 3,288 · Balance 48,719

F1: This transaction was made pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on May 28, 2026.

F2: This transaction was executed in multiple trades at prices ranging from $33.52 to $34.03, 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.

Filing footnotes · ownership attribution and instrument terms

F1: This transaction was made pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on May 28, 2026.

F2: This transaction was executed in multiple trades at prices ranging from $33.52 to $34.03, 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.

Transaction history

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Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”

The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.

Transaction dateCompanyActivity / securityShares / unitsReported priceReported valueDetails
October 12, 2026 Filed Oct 14, 2026 20:06 UTC CASTLE BIOSCIENCES INC CSTL · Entity 359 SaleCommon Stock 3,288 $33.64 $110,608.32
Disclosure

SEC source: 0001628280-26-065870 · wk-form4_1792008382.xml · nonDerivative · entry 1

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 48,719

F1 · kind: This transaction was made pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on May 28, 2026.

F2 · price: This transaction was executed in multiple trades at prices ranging from $33.52 to $34.03, 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.

Read SEC document
September 30, 2026 Filed Oct 2, 2026 00:21 UTC CASTLE BIOSCIENCES INC CSTL · Entity 359 SaleCommon Stock 1,034 $34.20 $35,362.80
Disclosure

SEC source: 0001628280-26-064267 · wk-form4_1790886076.xml · nonDerivative · entry 2

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 52,007

F1 · kind: This transaction was made pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on May 28, 2026.

F3 · price: This transaction was executed in multiple trades at prices ranging from $34.090 to $34.525, 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.

Read SEC document
September 29, 2026 Filed Oct 2, 2026 00:21 UTC CASTLE BIOSCIENCES INC CSTL · Entity 359 SaleCommon Stock 5,543 $35.50 $196,765.41
Disclosure

SEC source: 0001628280-26-064267 · wk-form4_1790886076.xml · nonDerivative · entry 1

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 53,041

F1 · kind: This transaction was made pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on May 28, 2026.

F2 · price: This transaction was executed in multiple trades at prices ranging from $35.010 to $35.935, 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.

Read SEC document
September 15, 2026 Filed Sep 16, 2026 20:20 UTC CASTLE BIOSCIENCES INC CSTL · Entity 359 SaleCommon Stock 3,294 $35.14 $115,757.75
Disclosure

SEC source: 0001628280-26-062255 · wk-form4_1789590027.xml · nonDerivative · entry 2

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 58,584

F1 · kind: This transaction was made pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on May 28, 2026.

F3 · price: This transaction was executed in multiple trades at prices ranging from $35.000 to $35.380, 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.

Read SEC document
September 14, 2026 Filed Sep 16, 2026 20:20 UTC CASTLE BIOSCIENCES INC CSTL · Entity 359 SaleCommon Stock 3,306 $32.32 $106,863.14
Disclosure

SEC source: 0001628280-26-062255 · wk-form4_1789590027.xml · nonDerivative · entry 1

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 61,878

F1 · kind: This transaction was made pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on May 28, 2026.

F2 · price: This transaction was executed in multiple trades at prices ranging from $32.180 to $32.445, 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.

Read SEC document
August 31, 2026 Filed Sep 2, 2026 20:07 UTC CASTLE BIOSCIENCES INC CSTL · Entity 359 SaleCommon Stock 1,730 $32.81 $56,761.30
Disclosure

SEC source: 0001628280-26-060089 · wk-form4_1788379622.xml · nonDerivative · entry 1

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 65,184

F1 · kind: This transaction was made pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on December 10, 2025.

F2 · price: This transaction was executed in multiple trades at prices ranging from $32.39 to $33.17, 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.

Read SEC document
August 25, 2026 Filed Aug 27, 2026 20:38 UTC CASTLE BIOSCIENCES INC CSTL · Entity 359 SaleCommon Stock 9,050 $35.04 $317,112.00
Disclosure

SEC source: 0001628280-26-059272 · wk-form4_1787863108.xml · nonDerivative · entry 1

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 66,914

F1 · kind: This transaction was made pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on December 10, 2025.

F2 · price: This transaction was executed in multiple trades at prices ranging from $35.00 to $35.14, 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.

Read SEC document
August 17, 2026 Filed Aug 19, 2026 20:11 UTC CASTLE BIOSCIENCES INC CSTL · Entity 359 SaleCommon Stock 1,730 $29.59 $51,190.70
Disclosure

SEC source: 0001628280-26-057949 · wk-form4_1787170306.xml · nonDerivative · entry 1

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 75,964

F1 · kind: This transaction was made pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on December 10, 2025.

F2 · price: This transaction was executed in multiple trades at prices ranging from $29.21 to $30.01, 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.

Read SEC document
August 03, 2026 Filed Aug 4, 2026 20:36 UTC CASTLE BIOSCIENCES INC CSTL · Entity 359 SaleCommon Stock 1,730 $28.25 $48,872.50
Disclosure

SEC source: 0001628280-26-052648 · wk-form4_1785875769.xml · nonDerivative · entry 4

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 78,995

F1 · kind: This transaction was made pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on December 10, 2025.

F5 · price: This transaction was executed in multiple trades at prices ranging from $28.030 to $28.630, 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.

Read SEC document
July 31, 2026 Filed Aug 4, 2026 20:36 UTC CASTLE BIOSCIENCES INC CSTL · Entity 359 SaleCommon Stock 1,891 $30.26 $57,229.22
Disclosure

SEC source: 0001628280-26-052648 · wk-form4_1785875769.xml · nonDerivative · entry 3

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 80,725

F1 · kind: This transaction was made pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on December 10, 2025.

F4 · price: This transaction was executed in multiple trades at prices ranging from $30.150 to $30.645, 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.

Read SEC document
July 31, 2026 Filed Aug 4, 2026 20:36 UTC CASTLE BIOSCIENCES INC CSTL · Entity 359 SaleCommon Stock 7,270 $29.58 $215,039.33
Disclosure

SEC source: 0001628280-26-052648 · wk-form4_1785875769.xml · nonDerivative · entry 2

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 82,616

F1 · kind: This transaction was made pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on December 10, 2025.

F3 · price: This transaction was executed in multiple trades at prices ranging from $29.150 to $30.130, 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.

Read SEC document
July 31, 2026 Filed Aug 4, 2026 20:36 UTC CASTLE BIOSCIENCES INC CSTL · Entity 359 SaleCommon Stock 8,149 $28.84 $235,033.46
Disclosure

SEC source: 0001628280-26-052648 · wk-form4_1785875769.xml · nonDerivative · entry 1

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 89,886

F1 · kind: This transaction was made pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on December 10, 2025.

F2 · price: This transaction was executed in multiple trades at prices ranging from $28.150 to $29.140, 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.

Read SEC document
May 21, 2026 Filed May 26, 2026 20:06 UTC CASTLE BIOSCIENCES INC CSTL · Entity 359 Exercise / conversionStock option (right to buy) · Derivative 11,210 $0.00 Strike: $3.38 $0.00
Disclosure

SEC source: 0001628280-26-038072 · wk-form4_1779825996.xml · derivative · entry 2

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 11,210 shares

Expires 2029-03-12

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_date: The shares subject to the option are fully vested.

Read SEC document
May 21, 2026 Filed May 26, 2026 20:06 UTC CASTLE BIOSCIENCES INC CSTL · Entity 359 Exercise / conversionCommon Stock 11,210 $3.38 $37,889.80
Disclosure

SEC source: 0001628280-26-038072 · wk-form4_1779825996.xml · nonDerivative · entry 1

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 98,035

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
March 12, 2026 Filed Mar 16, 2026 20:07 UTC CASTLE BIOSCIENCES INC CSTL · Entity 359 SaleCommon Stock 20,863 $25.24 $526,582.12
Disclosure

SEC source: 0001628280-26-018156 · wk-form4_1773691674.xml · nonDerivative · entry 1

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 86,825

F1 · kind: This transaction was made pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on December 10, 2025.

F2 · price: This transaction was executed in multiple trades at prices ranging from $24.90 to $25.70, 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.

Read SEC document
March 04, 2026 Filed Mar 5, 2026 22:18 UTC CASTLE BIOSCIENCES INC CSTL · Entity 359 Exercise / conversionRestricted Stock Units · Derivative 11,960 $0.00 $0.00
Disclosure

SEC source: 0001628280-26-015355 · wk-form4_1772749118.xml · derivative · entry 6

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 35,878

Underlying: Common Stock · 11,960 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each Restricted Stock Unit ("RSU") represents the right to receive one share of the Issuer's Common Stock.

F5 · derivative.exercise_date: On March 4, 2025, the Reporting Person was granted 47,838 RSUs which vest in four equal installments beginning on March 4, 2026.

F5 · derivative.expiration_date: On March 4, 2025, the Reporting Person was granted 47,838 RSUs which vest in four equal installments beginning on March 4, 2026.

Read SEC document
March 04, 2026 Filed Mar 5, 2026 22:18 UTC CASTLE BIOSCIENCES INC CSTL · Entity 359 Exercise / conversionRestricted Stock Units · Derivative 13,811 $0.00 $0.00
Disclosure

SEC source: 0001628280-26-015355 · wk-form4_1772749118.xml · derivative · entry 5

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,621

Underlying: Common Stock · 13,811 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each Restricted Stock Unit ("RSU") represents the right to receive one share of the Issuer's Common Stock.

F4 · derivative.exercise_date: On March 4, 2024, the Reporting Person was granted 55,243 RSUs which vest in four equal installments beginning on March 4, 2025.

F4 · derivative.expiration_date: On March 4, 2024, the Reporting Person was granted 55,243 RSUs which vest in four equal installments beginning on March 4, 2025.

Read SEC document
March 04, 2026 Filed Mar 5, 2026 22:18 UTC CASTLE BIOSCIENCES INC CSTL · Entity 359 Tax withholdingCommon Stock 10,399 $28.17 $292,939.83
Disclosure

SEC source: 0001628280-26-015355 · wk-form4_1772749118.xml · nonDerivative · entry 3

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 107,688

Read SEC document
March 04, 2026 Filed Mar 5, 2026 22:18 UTC CASTLE BIOSCIENCES INC CSTL · Entity 359 Exercise / conversionCommon Stock 25,771 Not disclosed Not disclosed
Disclosure

SEC source: 0001628280-26-015355 · wk-form4_1772749118.xml · nonDerivative · entry 2

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 118,087

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · price: Each Restricted Stock Unit ("RSU") represents the right to receive one share of the Issuer's Common Stock.

Read SEC document
March 03, 2026 Filed Mar 5, 2026 22:18 UTC CASTLE BIOSCIENCES INC CSTL · Entity 359 GrantRestricted Stock Units · Derivative 48,367 $0.00 $0.00
Disclosure

SEC source: 0001628280-26-015355 · wk-form4_1772749118.xml · derivative · entry 4

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 48,367

Underlying: Common Stock · 48,367 shares

Expires not disclosed

F2 · derivative.exercise_price: Each Restricted Stock Unit ("RSU") represents the right to receive one share of the Issuer's Common Stock.

F3 · derivative.exercise_date: The RSU's vest in four equal annual installments beginning on March 03, 2027.

F3 · derivative.expiration_date: The RSU's vest in four equal annual installments beginning on March 03, 2027.

Read SEC document
March 03, 2026 Filed Mar 5, 2026 22:18 UTC CASTLE BIOSCIENCES INC CSTL · Entity 359 Tax withholdingCommon Stock 3,716 $27.57 $102,450.12
Disclosure

SEC source: 0001628280-26-015355 · wk-form4_1772749118.xml · nonDerivative · entry 1

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 92,316

F1 · shares: 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.

Read SEC document
January 12, 2026 Filed Jan 14, 2026 21:30 UTC CASTLE BIOSCIENCES INC CSTL · Entity 359 GrantPerformance-Based Stock Unit · Derivative 9,207 $0.00 $0.00
Disclosure

SEC source: 0001856542-26-000002 · form4-01142026_040104.xml · derivative · entry 2

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,207

Underlying: Common Stock · 9,207 shares

Expires not disclosed

F2 · derivative.exercise_price: Each PSU represents the right to receive one share of the Issuer's Common Stock. These PSUs represent the remaining 50% of the 2024 PSUs which will vest subject to the achievement of certain milestones.

F2 · derivative.exercise_date: Each PSU represents the right to receive one share of the Issuer's Common Stock. These PSUs represent the remaining 50% of the 2024 PSUs which will vest subject to the achievement of certain milestones.

F2 · derivative.expiration_date: Each PSU represents the right to receive one share of the Issuer's Common Stock. These PSUs represent the remaining 50% of the 2024 PSUs which will vest subject to the achievement of certain milestones.

Read SEC document
January 12, 2026 Filed Jan 14, 2026 21:30 UTC CASTLE BIOSCIENCES INC CSTL · Entity 359 GrantCommon Stock 9,207 $0.00 $0.00
Disclosure

SEC source: 0001856542-26-000002 · form4-01142026_040104.xml · nonDerivative · entry 1

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 96,032

F1 · shares: Represents 50% of the Performance-Based Stock Units ("PSUs") granted on March 4, 2024 ("2024 PSUs") that vested based on the satisfaction of certain performance criteria as certified by the board of directors of the Issuer on January 12, 2026.

Read SEC document
December 11, 2025 Filed Dec 15, 2025 21:09 UTC CASTLE BIOSCIENCES INC CSTL · Entity 359 SaleCommon Stock 13,200 $37.48 $494,736.00
Disclosure

SEC source: 0001628280-25-057016 · wk-form4_1765832977.xml · nonDerivative · entry 1

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 86,825

F1 · price: This transaction was executed in multiple trades at prices ranging from $37.31 to $37.72, 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.

Read SEC document
December 10, 2025 Filed Dec 11, 2025 23:44 UTC CASTLE BIOSCIENCES INC CSTL · Entity 359 Exercise / conversionRestricted Stock Units · Derivative 6,170 $0.00 $0.00
Disclosure

SEC source: 0001628280-25-056625 · wk-form4_1765496679.xml · derivative · entry 6

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 6,170 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each Restricted Stock Unit ("RSU") represents the right to receive one share of the Issuer's Common Stock.

F4 · derivative.exercise_date: On December 10, 2021, the Reporting Person was granted 24,679 RSUs which vest in four equal installments beginning on December 10, 2022.

F4 · derivative.expiration_date: On December 10, 2021, the Reporting Person was granted 24,679 RSUs which vest in four equal installments beginning on December 10, 2022.

Read SEC document
December 10, 2025 Filed Dec 11, 2025 23:44 UTC CASTLE BIOSCIENCES INC CSTL · Entity 359 Tax withholdingCommon Stock 2,490 $38.02 $94,669.80
Disclosure

SEC source: 0001628280-25-056625 · wk-form4_1765496679.xml · nonDerivative · entry 4

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 100,025

Read SEC document
December 10, 2025 Filed Dec 11, 2025 23:44 UTC CASTLE BIOSCIENCES INC CSTL · Entity 359 Exercise / conversionCommon Stock 6,170 Not disclosed Not disclosed
Disclosure

SEC source: 0001628280-25-056625 · wk-form4_1765496679.xml · nonDerivative · entry 3

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 102,515

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each Restricted Stock Unit ("RSU") represents the right to receive one share of the Issuer's Common Stock.

Read SEC document
December 09, 2025 Filed Dec 11, 2025 23:44 UTC CASTLE BIOSCIENCES INC CSTL · Entity 359 Exercise / conversionRestricted Stock Units · Derivative 15,961 $0.00 $0.00
Disclosure

SEC source: 0001628280-25-056625 · wk-form4_1765496679.xml · derivative · entry 5

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,961

Underlying: Common Stock · 15,961 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each Restricted Stock Unit ("RSU") represents the right to receive one share of the Issuer's Common Stock.

F3 · derivative.exercise_date: On December 9, 2022, the Reporting Person was granted 63,844 RSUs which vest in four equal installments beginning on December 9, 2023.

F3 · derivative.expiration_date: On December 9, 2022, the Reporting Person was granted 63,844 RSUs which vest in four equal installments beginning on December 9, 2023.

Read SEC document
December 09, 2025 Filed Dec 11, 2025 23:44 UTC CASTLE BIOSCIENCES INC CSTL · Entity 359 Tax withholdingCommon Stock 6,441 $38.25 $246,368.25
Disclosure

SEC source: 0001628280-25-056625 · wk-form4_1765496679.xml · nonDerivative · entry 2

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 96,345

Read SEC document
December 09, 2025 Filed Dec 11, 2025 23:44 UTC CASTLE BIOSCIENCES INC CSTL · Entity 359 Exercise / conversionCommon Stock 15,961 Not disclosed Not disclosed
Disclosure

SEC source: 0001628280-25-056625 · wk-form4_1765496679.xml · nonDerivative · entry 1

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 102,786

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each Restricted Stock Unit ("RSU") represents the right to receive one share of the Issuer's Common Stock.

F2 · balance_after: The amount includes 2,230 shares previously held by the Tobin W and Susan M Juvenal Family Revocable Trust, which were distributed to the Reporting Person on February 5, 2025, and are now owned directly.

Read SEC document
November 24, 2025 Filed Aug 6, 2026 20:14 UTC CASTLE BIOSCIENCES INC CSTL · Entity 359 SaleCommon Stock 1,301 $38.39 $49,945.39
Disclosure

SEC source: 0001628280-26-054338 · wk-form4_1786047286.xml · nonDerivative · entry 1

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 77,694

F1 · kind: This transaction was made pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on September 11, 2024.

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November 20, 2025 Filed Nov 24, 2025 21:24 UTC CASTLE BIOSCIENCES INC CSTL · Entity 359 Exercise / conversionStock option (right to buy) · Derivative 4,693 $0.00 Strike: $3.38 $0.00
Disclosure

SEC source: 0001628280-25-053812 · wk-form4_1764019447.xml · derivative · entry 4

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 11,210

Underlying: Common Stock · 4,693 shares

Expires 2029-03-12

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: This transaction was made pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on September 11, 2024.

F5 · derivative.exercise_date: The shares subject to the option are fully vested.

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November 20, 2025 Filed Nov 24, 2025 21:24 UTC CASTLE BIOSCIENCES INC CSTL · Entity 359 SaleCommon Stock 4,693 $35.58 $166,976.94
Disclosure

SEC source: 0001628280-25-053812 · wk-form4_1764019447.xml · nonDerivative · entry 2

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 84,595

F1 · kind: This transaction was made pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on September 11, 2024.

F3 · price: This transaction was executed in multiple trades at prices ranging from $35.40 to $35.85, 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 · balance_after: Reflects an adjustment of 68 shares to the number of shares beneficially owned following a reconciliation of the Reporting Person's records.

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November 20, 2025 Filed Nov 24, 2025 21:24 UTC CASTLE BIOSCIENCES INC CSTL · Entity 359 Exercise / conversionCommon Stock 4,693 $3.38 $15,862.34
Disclosure

SEC source: 0001628280-25-053812 · wk-form4_1764019447.xml · nonDerivative · entry 1

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 89,288

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: This transaction was made pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on September 11, 2024.

F2 · balance_after: Reflects an adjustment of 68 shares to the number of shares beneficially owned following a reconciliation of the Reporting Person's records.

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November 12, 2025 Filed Nov 13, 2025 21:08 UTC CASTLE BIOSCIENCES INC CSTL · Entity 359 SaleCommon Stock 200 $35.40 $7,080.00
Disclosure

SEC source: 0001628280-25-052019 · wk-form4_1763068093.xml · nonDerivative · entry 2

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 83,827

F1 · kind: This transaction was made pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on September 11, 2024.

F3 · price: This transaction was executed at a price of $35.40. 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.

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November 12, 2025 Filed Nov 14, 2025 21:09 UTC Amendment CASTLE BIOSCIENCES INC CSTL · Entity 359 Exercise / conversionStock option (right to buy) · Derivative 200 $0.00 Strike: $3.38 $0.00
Disclosure

SEC source: 0001628280-25-052350 · wk-form4a_1763154587.xml · derivative · entry 7

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 15,903

Underlying: Common Stock · 200 shares

Expires 2029-03-12

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: This transaction was made pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on September 11, 2024.

F5 · kind: The exercise of the options was inadvertently omitted from the original Form 4 filing and is now being reported in this Amendment.

F6 · derivative.exercise_date: The shares subject to the option are fully vested.

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November 12, 2025 Filed Nov 14, 2025 21:09 UTC Amendment CASTLE BIOSCIENCES INC CSTL · Entity 359 SaleCommon Stock 200 $35.40 $7,080.00
Disclosure

SEC source: 0001628280-25-052350 · wk-form4a_1763154587.xml · nonDerivative · entry 4

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 84,527

F1 · kind: This transaction was made pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on September 11, 2024.

F3 · price: This transaction was executed at a price of $35.40. 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.

Read SEC document
November 12, 2025 Filed Nov 14, 2025 21:09 UTC Amendment CASTLE BIOSCIENCES INC CSTL · Entity 359 Exercise / conversionCommon Stock 200 $3.38 $676.00
Disclosure

SEC source: 0001628280-25-052350 · wk-form4a_1763154587.xml · nonDerivative · entry 3

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 84,727

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: This transaction was made pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on September 11, 2024.

Read SEC document
November 11, 2025 Filed Nov 13, 2025 21:08 UTC CASTLE BIOSCIENCES INC CSTL · Entity 359 SaleCommon Stock 500 $35.39 $17,695.00
Disclosure

SEC source: 0001628280-25-052019 · wk-form4_1763068093.xml · nonDerivative · entry 1

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 84,027

F1 · kind: This transaction was made pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on September 11, 2024.

F2 · price: This transaction was executed in multiple trades at prices ranging from $35.38 to $35.40, 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.

Read SEC document
November 11, 2025 Filed Nov 14, 2025 21:09 UTC Amendment CASTLE BIOSCIENCES INC CSTL · Entity 359 Exercise / conversionStock option (right to buy) · Derivative 500 $0.00 Strike: $3.38 $0.00
Disclosure

SEC source: 0001628280-25-052350 · wk-form4a_1763154587.xml · derivative · entry 6

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 16,103

Underlying: Common Stock · 500 shares

Expires 2029-03-12

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: This transaction was made pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on September 11, 2024.

F5 · kind: The exercise of the options was inadvertently omitted from the original Form 4 filing and is now being reported in this Amendment.

F6 · derivative.exercise_date: The shares subject to the option are fully vested.

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November 11, 2025 Filed Nov 14, 2025 21:09 UTC Amendment CASTLE BIOSCIENCES INC CSTL · Entity 359 SaleCommon Stock 500 $35.39 $17,695.00
Disclosure

SEC source: 0001628280-25-052350 · wk-form4a_1763154587.xml · nonDerivative · entry 2

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 84,527

F1 · kind: This transaction was made pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on September 11, 2024.

F2 · price: This transaction was executed in multiple trades at prices ranging from $35.38 to $35.40, 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.

Read SEC document
November 11, 2025 Filed Nov 14, 2025 21:09 UTC Amendment CASTLE BIOSCIENCES INC CSTL · Entity 359 Exercise / conversionCommon Stock 500 $3.38 $1,690.00
Disclosure

SEC source: 0001628280-25-052350 · wk-form4a_1763154587.xml · nonDerivative · entry 1

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 85,027

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: This transaction was made pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on September 11, 2024.

Read SEC document
August 08, 2025 Filed Aug 12, 2025 20:30 UTC CASTLE BIOSCIENCES INC CSTL · Entity 359 Exercise / conversionPerformance-Based Stock Unit · Derivative 10,640 $0.00 $0.00
Disclosure

SEC source: 0001856542-25-000003 · wk-form4_1755030624.xml · derivative · entry 4

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 10,640 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each Performance-Based Stock Unit ("PSU") represents the right to receive one share of the Issuer's Common Stock. These PSUs represent the remaining 50% of the PSUs granted on December 23, 2022, which were all subject to time-based vesting and vested in full on the one-year anniversary of August 9, 2024.

F2 · derivative.exercise_date: Each Performance-Based Stock Unit ("PSU") represents the right to receive one share of the Issuer's Common Stock. These PSUs represent the remaining 50% of the PSUs granted on December 23, 2022, which were all subject to time-based vesting and vested in full on the one-year anniversary of August 9, 2024.

F2 · derivative.expiration_date: Each Performance-Based Stock Unit ("PSU") represents the right to receive one share of the Issuer's Common Stock. These PSUs represent the remaining 50% of the PSUs granted on December 23, 2022, which were all subject to time-based vesting and vested in full on the one-year anniversary of August 9, 2024.

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August 08, 2025 Filed Aug 12, 2025 20:30 UTC CASTLE BIOSCIENCES INC CSTL · Entity 359 Tax withholdingCommon Stock 4,294 $19.36 $83,131.84
Disclosure

SEC source: 0001856542-25-000003 · wk-form4_1755030624.xml · nonDerivative · entry 2

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 84,527

Read SEC document
August 08, 2025 Filed Aug 12, 2025 20:30 UTC CASTLE BIOSCIENCES INC CSTL · Entity 359 Exercise / conversionCommon Stock 10,640 $0.00 $0.00
Disclosure

SEC source: 0001856542-25-000003 · wk-form4_1755030624.xml · nonDerivative · entry 1

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 88,821

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
March 04, 2025 Filed Mar 6, 2025 21:14 UTC CASTLE BIOSCIENCES INC CSTL · Entity 359 Exercise / conversionRestricted Stock Units · Derivative 13,811 $0.00 $0.00
Disclosure

SEC source: 0001447362-25-000036 · wk-form4_1741295669.xml · derivative · entry 5

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 41,432

Underlying: Common Stock · 13,811 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each Restricted Stock Unit ("RSU") represents the right to receive one share of the Issuer's Common Stock.

F4 · derivative.exercise_date: On March 4, 2024, the Reporting Person was granted 55,243 RSUs which vest in four equal installments beginning on March 4, 2025.

F4 · derivative.expiration_date: On March 4, 2024, the Reporting Person was granted 55,243 RSUs which vest in four equal installments beginning on March 4, 2025.

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March 04, 2025 Filed Mar 6, 2025 21:14 UTC CASTLE BIOSCIENCES INC CSTL · Entity 359 GrantRestricted Stock Units · Derivative 47,838 $0.00 $0.00
Disclosure

SEC source: 0001447362-25-000036 · wk-form4_1741295669.xml · derivative · entry 4

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 47,838

Underlying: Common Stock · 47,838 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Restricted Stock Unit ("RSU") represents the right to receive one share of the Issuer's Common Stock.

F3 · derivative.exercise_date: The RSU's vest in four equal annual installments beginning on March 04, 2026.

F3 · derivative.expiration_date: The RSU's vest in four equal annual installments beginning on March 04, 2026.

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March 04, 2025 Filed Mar 6, 2025 21:14 UTC CASTLE BIOSCIENCES INC CSTL · Entity 359 Tax withholdingCommon Stock 5,573 $22.23 $123,887.79
Disclosure

SEC source: 0001447362-25-000036 · wk-form4_1741295669.xml · nonDerivative · entry 2

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 78,181

Read SEC document
March 04, 2025 Filed Mar 6, 2025 21:14 UTC CASTLE BIOSCIENCES INC CSTL · Entity 359 Exercise / conversionCommon Stock 13,811 Not disclosed Not disclosed
Disclosure

SEC source: 0001447362-25-000036 · wk-form4_1741295669.xml · nonDerivative · entry 1

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 83,754

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each Restricted Stock Unit ("RSU") represents the right to receive one share of the Issuer's Common Stock.

Read SEC document
January 06, 2025 Filed Jan 8, 2025 23:17 UTC CASTLE BIOSCIENCES INC CSTL · Entity 359 SaleCommon Stock 2,230 $30.00 $66,900.00
Disclosure

SEC source: 0001447362-25-000004 · wk-form4_1736378220.xml · nonDerivative · entry 1

Juvenal Tobin W · CIK 0001856542 · Chief Commercial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 69,943

F1 · kind: This transaction was made pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on September 11, 2024.

Read SEC document

Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.