Casi DeYoung

CIK: 0001652066

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)0 (0.0%)

Position reduction

Option Exercises (M)0 (0.0%)

Derivative conversions

Awards (A)2 (33.3%)

Compensation grants

Other (G, F, J, C, D, …)4 (66.7%)

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

Companies & Roles (1)

STTK

Shattuck Labs, Inc.

Officer

Discretionary Trading P&L

Holdings

Transaction History (6 total)

STTK
Shattuck Labs, Inc.
Jan 25, 2026
Tax Payment(F)
Direct
2.3K shares at avg. $4.15$9K
STTK
Shattuck Labs, Inc.
Jan 10, 2026
Tax Payment(F)
Direct
5.7K shares at avg. $4.75$27K
STTK
Shattuck Labs, Inc.
Jan 10, 2026
Award(A)
Common Stock
Direct
381.6K shares-
STTK
Shattuck Labs, Inc.
Jan 28, 2025
Award(A)
Common Stock
Direct
194.3K shares-
STTK
Shattuck Labs, Inc.
Jan 25, 2025
Tax Payment(F)
Direct
2.3K shares at avg. $1.16$3K
STTK
Shattuck Labs, Inc.
Jan 10, 2025
Tax Payment(F)
Direct
5.7K shares at avg. $1.19$7K

		Type	Shares	Price		Ownership
Jan 25, 2026	STTK Shattuck Labs, Inc.	Tax Payment(F)	2,286	$4.15	$9,487	Direct
Jan 10, 2026	STTK Shattuck Labs, Inc.	Tax Payment(F)	5,699	$4.75	$27,070	Direct
Jan 10, 2026	STTK Shattuck Labs, Inc.	Award(A) Common Stock	381,600	-	-	Direct
Jan 28, 2025	STTK Shattuck Labs, Inc.	Award(A) Common Stock	194,300	-	-	Direct
Jan 25, 2025	STTK Shattuck Labs, Inc.	Tax Payment(F)	2,297	$1.16	$2,665	Direct
Jan 10, 2025	STTK Shattuck Labs, Inc.	Tax Payment(F)	5,727	$1.19	$6,815	Direct

1-6 of 6 transactions

About DeYoung Casi

DeYoung Casi (SEC CIK 0001652066) files insider reports with the SEC as Chief Business Officer of Shattuck Labs, Inc. (STTK).

Signal8 holds 4 ownership filings by DeYoung Casi, all Form 4s, filed between Jan 13, 2025 and Jan 27, 2026. Those filings report 6 transactions, from Jan 10, 2025 to Jan 25, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on DeYoung Casi's filings is in AUSTIN, TX.

Recent filings by DeYoung Casi

Jan 25, 2026: Tax withholding of STTK shares (Form 4, code F).
Jan 10, 2026: Tax withholding of STTK shares (Form 4, code F).
Jan 10, 2026: Grant or award of STTK derivative securities (Form 4, code A).
Jan 28, 2025: Grant or award of STTK derivative securities (Form 4, code A).
Jan 25, 2025: Tax withholding of STTK shares (Form 4, code F).

Other insiders filing for Shattuck Labs, Inc. (STTK)

Shukla Abhinav A., Chief Technical Officer
Pandite Arundathy N., Chief Medical Officer
Ashiya Mona, Director
ORBIMED ADVISORS LLC, Director
SIEGALL CLAY B, Director
Baker Daniel G., Director

How to read Form 4 transaction codes