Tobin W. Juvenal

CIK: 0001856542

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)24 (48.0%)

Position reduction

Option Exercises (M)14 (28.0%)

Derivative conversions

Awards (A)3 (6.0%)

Compensation grants

Other (G, F, J, C, D, …)9 (18.0%)

Gifts, tax withholding, conversions, dispositions to the issuer and other codes

Companies & Roles (1)

CSTL

CASTLE BIOSCIENCES INC

Officer

Discretionary Trading P&L

Holdings

Transaction History (50 total)

CSTL
CASTLE BIOSCIENCES INC
Oct 28, 2026
Sale(S)
Direct
5.3K shares at avg. $36.62$196K
CSTL
CASTLE BIOSCIENCES INC
Oct 28, 2026
Sale(S)
Direct
1.2K shares at avg. $35.58$44K
CSTL
CASTLE BIOSCIENCES INC
Oct 26, 2026
Sale(S)
Direct
3.3K shares at avg. $33.08$109K
CSTL
CASTLE BIOSCIENCES INC
Oct 12, 2026
Sale(S)
Direct
3.3K shares at avg. $33.64$111K
CSTL
CASTLE BIOSCIENCES INC
Sep 30, 2026
Sale(S)
Direct
1K shares at avg. $34.20$35K
CSTL
CASTLE BIOSCIENCES INC
Sep 29, 2026
Sale(S)
Direct
5.5K shares at avg. $35.50$197K
CSTL
CASTLE BIOSCIENCES INC
Sep 15, 2026
Sale(S)
Direct
3.3K shares at avg. $35.14$116K
CSTL
CASTLE BIOSCIENCES INC
Sep 14, 2026
Sale(S)
Direct
3.3K shares at avg. $32.32$107K
CSTL
CASTLE BIOSCIENCES INC
Aug 31, 2026
Sale(S)
Direct
1.7K shares at avg. $32.81$57K
CSTL
CASTLE BIOSCIENCES INC
Aug 25, 2026
Sale(S)
Direct
9.1K shares at avg. $35.04$317K
CSTL
CASTLE BIOSCIENCES INC
Aug 17, 2026
Sale(S)
Direct
1.7K shares at avg. $29.59$51K
CSTL
CASTLE BIOSCIENCES INC
Aug 3, 2026
Sale(S)
Direct
1.7K shares at avg. $28.25$49K
CSTL
CASTLE BIOSCIENCES INC
Jul 31, 2026
Sale(S)
Direct
1.9K shares at avg. $30.26$57K
CSTL
CASTLE BIOSCIENCES INC
Jul 31, 2026
Sale(S)
Direct
7.3K shares at avg. $29.58$215K
CSTL
CASTLE BIOSCIENCES INC
Jul 31, 2026
Sale(S)
Direct
8.1K shares at avg. $28.84$235K
CSTL
CASTLE BIOSCIENCES INC
May 21, 2026
Exercise(M)
Direct
11.2K shares at avg. $3.38$38K
CSTL
CASTLE BIOSCIENCES INC
Mar 12, 2026
Sale(S)
Direct
20.9K shares at avg. $25.24$527K
CSTL
CASTLE BIOSCIENCES INC
Mar 4, 2026
Exercise(M)
Direct
25.8K shares-
CSTL
CASTLE BIOSCIENCES INC
Mar 4, 2026
Tax Payment(F)
Direct
10.4K shares at avg. $28.17$293K
CSTL
CASTLE BIOSCIENCES INC
Mar 3, 2026
Award(A)
Restricted Stock Units
Direct
48.4K shares-
CSTL
CASTLE BIOSCIENCES INC
Mar 3, 2026
Tax Payment(F)
Direct
3.7K shares at avg. $27.57$102K
CSTL
CASTLE BIOSCIENCES INC
Jan 12, 2026
Award(A)
Direct
9.2K shares-
CSTL
CASTLE BIOSCIENCES INC
Dec 11, 2025
Sale(S)
Direct
13.2K shares at avg. $37.48$495K
CSTL
CASTLE BIOSCIENCES INC
Dec 10, 2025
Exercise(M)
Direct
6.2K shares-
CSTL
CASTLE BIOSCIENCES INC
Dec 10, 2025
Tax Payment(F)
Direct
2.5K shares at avg. $38.02$95K

		Type	Shares	Price		Ownership
Oct 28, 2026	CSTL CASTLE BIOSCIENCES INC	Sale(S)	5,341	$36.62	$195,582	Direct
Oct 28, 2026	CSTL CASTLE BIOSCIENCES INC	Sale(S)	1,237	$35.58	$44,009	Direct
Oct 26, 2026	CSTL CASTLE BIOSCIENCES INC	Sale(S)	3,288	$33.08	$108,767	Direct
Oct 12, 2026	CSTL CASTLE BIOSCIENCES INC	Sale(S)	3,288	$33.64	$110,608	Direct
Sep 30, 2026	CSTL CASTLE BIOSCIENCES INC	Sale(S)	1,034	$34.20	$35,363	Direct
Sep 29, 2026	CSTL CASTLE BIOSCIENCES INC	Sale(S)	5,543	$35.50	$196,765	Direct
Sep 15, 2026	CSTL CASTLE BIOSCIENCES INC	Sale(S)	3,294	$35.14	$115,758	Direct
Sep 14, 2026	CSTL CASTLE BIOSCIENCES INC	Sale(S)	3,306	$32.32	$106,863	Direct
Aug 31, 2026	CSTL CASTLE BIOSCIENCES INC	Sale(S)	1,730	$32.81	$56,761	Direct
Aug 25, 2026	CSTL CASTLE BIOSCIENCES INC	Sale(S)	9,050	$35.04	$317,112	Direct
Aug 17, 2026	CSTL CASTLE BIOSCIENCES INC	Sale(S)	1,730	$29.59	$51,191	Direct
Aug 3, 2026	CSTL CASTLE BIOSCIENCES INC	Sale(S)	1,730	$28.25	$48,873	Direct
Jul 31, 2026	CSTL CASTLE BIOSCIENCES INC	Sale(S)	1,891	$30.26	$57,229	Direct
Jul 31, 2026	CSTL CASTLE BIOSCIENCES INC	Sale(S)	7,270	$29.58	$215,039	Direct
Jul 31, 2026	CSTL CASTLE BIOSCIENCES INC	Sale(S)	8,149	$28.84	$235,033	Direct
May 21, 2026	CSTL CASTLE BIOSCIENCES INC	Exercise(M)	11,210	$3.38	$37,890	Direct
Mar 12, 2026	CSTL CASTLE BIOSCIENCES INC	Sale(S)	20,863	$25.24	$526,582	Direct
Mar 4, 2026	CSTL CASTLE BIOSCIENCES INC	Exercise(M)	25,771	-	$0	Direct
Mar 4, 2026	CSTL CASTLE BIOSCIENCES INC	Tax Payment(F)	10,399	$28.17	$292,940	Direct
Mar 3, 2026	CSTL CASTLE BIOSCIENCES INC	Award(A) Restricted Stock Units	48,367	-	-	Direct
Mar 3, 2026	CSTL CASTLE BIOSCIENCES INC	Tax Payment(F)	3,716	$27.57	$102,450	Direct
Jan 12, 2026	CSTL CASTLE BIOSCIENCES INC	Award(A)	9,207	-	$0	Direct
Dec 11, 2025	CSTL CASTLE BIOSCIENCES INC	Sale(S)	13,200	$37.48	$494,736	Direct
Dec 10, 2025	CSTL CASTLE BIOSCIENCES INC	Exercise(M)	6,170	-	-	Direct
Dec 10, 2025	CSTL CASTLE BIOSCIENCES INC	Tax Payment(F)	2,490	$38.02	$94,670	Direct

1-25 of 50 transactions

About Juvenal Tobin W

Juvenal Tobin W (SEC CIK 0001856542) files insider reports with the SEC as Chief Commercial Officer of CASTLE BIOSCIENCES INC (CSTL).

Signal8 holds 25 ownership filings by Juvenal Tobin W, all Form 4s, filed between Nov 5, 2024 and Oct 30, 2026. Those filings report 50 transactions, from Nov 1, 2024 to Oct 28, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Juvenal Tobin W's filings is in FRIENDSWOOD, TX.

Recent filings by Juvenal Tobin W

Oct 28, 2026: Open-market sales of CSTL shares (2 lines, Form 4, code S).
Oct 26, 2026: Open-market sale of CSTL shares (Form 4, code S).
Oct 12, 2026: Open-market sale of CSTL shares (Form 4, code S).
Sep 30, 2026: Open-market sale of CSTL shares (Form 4, code S).
Sep 29, 2026: Open-market sale of CSTL shares (Form 4, code S).

Other insiders filing for CASTLE BIOSCIENCES INC (CSTL)

MAETZOLD DEREK J, Pres. & Chief Exec. Officer
Oelschlager Kristen M, Chief Operating Officer
Stokes Frank, Chief Financial Officer
Olson Tiffany, Director
Goldberg Ellen, Director
Harrison Miles, Director

How to read Form 4 transaction codes