Form 4 Tracker
CASTLE BIOSCIENCES INC
CSTL

60 insider filings · Latest: Oct 12, 2026

Common Stock Transactions
Txn DateAcceptedInsiderTypeSharesAvg PriceValueShares OwnedFiling
Oct 12, 2026Oct 14 8:06 PMTobin W JuvenalChief Commercial Officer
Sale
3,288$33.64$110.6K48,719(D)

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Oct 12, 2026Oct 13 12:52 PMTobin Juvenal
Proposed Sale
13,154$32.76$430.9K—

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Oct 5, 2026Oct 7 8:10 PMDerek J MaetzoldDirector, Pres. & Chief Exec. Officer
Sale
14,496$35.57$515.6K6,832(I)

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Oct 5, 2026Oct 5 10:24 PMDerek Maetzold
Proposed Sale
28,992$36.65$1.1M—

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Oct 1, 2026Oct 5 8:07 PMKristen M OelschlagerChief Operating Officer
Sale
4,153$35.95$149.3K13,356(D)

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Oct 1, 2026Oct 1 8:24 PMKRISTEN OELSCHLAGER
Proposed Sale
4,153$35.53$147.6K—

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Sep 30, 2026Oct 1 8:21 PMTobin W JuvenalChief Commercial Officer
Sale
1,034$34.20$35.4K52,007(D)

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Sep 29, 2026Oct 1 8:21 PMTobin W JuvenalChief Commercial Officer
Sale
5,543$35.50$196.8K53,041(D)

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Sep 21, 2026Sep 23 8:27 PMDerek J MaetzoldDirector, Pres. & Chief Exec. Officer
Sale
14,496$35.33$512.2K9,550(I)

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Sep 15, 2026Sep 16 8:20 PMTobin W JuvenalChief Commercial Officer
Sale
3,294$35.14$115.8K58,584(D)

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Sep 14, 2026Sep 16 8:20 PMTobin W JuvenalChief Commercial Officer
Sale
3,306$32.32$106.9K61,878(D)

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Sep 11, 2026Sep 15 8:08 PMDerek J MaetzoldDirector, Pres. & Chief Exec. Officer
Sale
14,518$32.02$464.9K12,268(I)

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Sep 14, 2026Sep 14 10:00 PMTobin Juvenal
Proposed Sale
13,177$33.44$440.6K—

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Sep 11, 2026Sep 11 10:53 PMDerek Maetzold
Proposed Sale
29,014$32.33$938.0K—

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Sep 1, 2026Sep 3 8:07 PMKristen M OelschlagerChief Operating Officer
Sale
4,152$33.39$138.6K13,356(D)

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Aug 31, 2026Sep 2 8:07 PMTobin W JuvenalChief Commercial Officer
Sale
1,730$32.81$56.8K65,184(D)

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Aug 28, 2026Sep 1 8:12 PMDerek J MaetzoldDirector, Pres. & Chief Exec. Officer
Sale
18,560$33.20$616.1K11,256(I)

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Aug 25, 2026Aug 27 8:38 PMTobin W JuvenalChief Commercial Officer
Sale
9,050$35.04$317.1K66,914(D)

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Aug 25, 2026Aug 26 8:16 PMKristen M OelschlagerChief Operating Officer
Sale
12,384$34.42$426.3K72,649(I)

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Aug 24, 2026Aug 26 8:16 PMKristen M OelschlagerChief Operating Officer
Sale
12,218$33.69$411.6K85,033(I)

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Page 1 of 6

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Stock Options & Derivatives
Txn DateAcceptedInsiderTypeSharesExercise PriceShares OwnedFiling
May 28, 2026Jun 1 8:47 PMKim CapleDirector
Grant/Award
11,766—11,766(D)

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May 28, 2026Jun 1 8:44 PMDaniel BradburyDirector
Grant/Award
11,766—11,766(D)

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May 28, 2026Jun 1 8:43 PMBradley G ColeDirector
Grant/Award
11,766—11,766(D)

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May 22, 2026May 27 8:20 PMBradley G ColeDirector
Option Exercise
13,667—0(D)

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May 22, 2026May 27 8:18 PMDaniel BradburyDirector
Option Exercise
13,667—0(D)

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May 22, 2026May 27 8:18 PMMiles HarrisonDirector
Option Exercise
13,667—0(D)

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May 22, 2026May 27 8:17 PMTiffany OlsonDirector
Option Exercise
13,667—0(D)

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May 22, 2026May 27 8:17 PMEllen GoldbergDirector
Option Exercise
13,667—0(D)

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May 22, 2026May 27 8:16 PMKim CapleDirector
Option Exercise
13,667—0(D)

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May 22, 2026May 27 8:16 PMRodney CottonDirector
Option Exercise
13,667—0(D)

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May 21, 2026May 26 8:06 PMTobin W JuvenalChief Commercial Officer
Option Exercise
11,210$3.380(D)

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May 21, 2026May 22 8:12 PMDerek J MaetzoldDirector, Pres. & Chief Exec. Officer
Option Exercise
420$2.39204(D)

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May 20, 2026May 22 8:12 PMDerek J MaetzoldDirector, Pres. & Chief Exec. Officer
Option Exercise
130$2.39624(D)

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May 7, 2026May 11 8:06 PMDerek J MaetzoldDirector, Pres. & Chief Exec. Officer
Option Exercise
6,214$2.39754(D)

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Apr 21, 2026Apr 23 8:16 PMDerek J MaetzoldDirector, Pres. & Chief Exec. Officer
Option Exercise
550$2.396,968(D)

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Apr 6, 2026Apr 8 8:34 PMDerek J MaetzoldDirector, Pres. & Chief Exec. Officer
Option Exercise
6,214$2.397,518(D)

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Mar 26, 2026Mar 30 10:29 PMDerek J MaetzoldDirector, Pres. & Chief Exec. Officer
Option Exercise
550$2.3913,732(D)

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Mar 26, 2026Mar 30 10:27 PMRodney CottonDirector
Option Exercise
5,329—5,330(D)

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Mar 11, 2026Mar 13 8:10 PMDerek J MaetzoldDirector, Pres. & Chief Exec. Officer
Option Exercise
6,226$2.3914,282(D)

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Mar 5, 2026Mar 9 8:12 PMBradley G ColeDirector
Option Exercise
4,748$3.3820,000(D)

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