Donald H. Picker

CIK: 0001266800

Transaction Breakdown

Open Market Buys (P)1 (5.9%)

High conviction signal

Open Market Sales (S)0 (0.0%)

Position reduction

Option Exercises (M)5 (29.4%)

Derivative conversions

Awards (A)6 (35.3%)

Compensation grants

Other (G, F, J, C, D, …)5 (29.4%)

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

Companies & Roles (1)

MBRX

Moleculin Biotech, Inc.

Officer

Discretionary Trading P&L

Holdings

Transaction History (17 total)

MBRX
Moleculin Biotech, Inc.
Oct 15, 2026
Award(A)
Stock Options (right to buy)
Direct
250K shares-
MBRX
Moleculin Biotech, Inc.
Aug 3, 2026
Purchase(P)
Direct
173.3K shares-
MBRX
Moleculin Biotech, Inc.
Jun 22, 2026
Tax Payment(F)
Direct
21 shares at avg. $3.12$65.52
MBRX
Moleculin Biotech, Inc.
Jun 22, 2026
Exercise(M)
Direct
71 shares-
MBRX
Moleculin Biotech, Inc.
Jun 20, 2026
Tax Payment(F)
Direct
13 shares at avg. $2.88$37.44
MBRX
Moleculin Biotech, Inc.
Jun 20, 2026
Exercise(M)
Direct
44 shares-
MBRX
Moleculin Biotech, Inc.
Nov 12, 2025
Award(A)
Performance Based Restricted Stock Units
Direct
200K shares-
MBRX
Moleculin Biotech, Inc.
Nov 12, 2025
Award(A)
Stock option (right to buy)
Direct
200K shares-
MBRX
Moleculin Biotech, Inc.
Nov 4, 2025
Exercise(M)
Direct
8.8K shares-
MBRX
Moleculin Biotech, Inc.
Nov 4, 2025
Tax Payment(F)
Direct
2.1K shares at avg. $0.50$1K
MBRX
Moleculin Biotech, Inc.
Jun 22, 2025
Tax Payment(F)
Direct
430 shares at avg. $0.27$114.81
MBRX
Moleculin Biotech, Inc.
Jun 22, 2025
Exercise(M)
Direct
1.8K shares-
MBRX
Moleculin Biotech, Inc.
Jun 20, 2025
Tax Payment(F)
Direct
263 shares at avg. $0.27$70.221
MBRX
Moleculin Biotech, Inc.
Jun 20, 2025
Exercise(M)
Direct
1.1K shares-
MBRX
Moleculin Biotech, Inc.
Nov 4, 2024
Award(A)
Stock option (right to buy)
Direct
40K shares-
MBRX
Moleculin Biotech, Inc.
Nov 4, 2024
Award(A)
Restricted Stock Units
Direct
35K shares-
MBRX
Moleculin Biotech, Inc.
Oct 25, 2024
Award(A)
Performance Based Restricted Stock Units
Direct
5.7K shares-

		Type	Shares	Price		Ownership
Oct 15, 2026	MBRX Moleculin Biotech, Inc.	Award(A) Stock Options (right to buy)	250,000	-	-	Direct
Aug 3, 2026	MBRX Moleculin Biotech, Inc.	Purchase(P)	173,333	-	$0	Direct
Jun 22, 2026	MBRX Moleculin Biotech, Inc.	Tax Payment(F)	21	$3.12	$66	Direct
Jun 22, 2026	MBRX Moleculin Biotech, Inc.	Exercise(M)	71	-	$0	Direct
Jun 20, 2026	MBRX Moleculin Biotech, Inc.	Tax Payment(F)	13	$2.88	$37	Direct
Jun 20, 2026	MBRX Moleculin Biotech, Inc.	Exercise(M)	44	-	$0	Direct
Nov 12, 2025	MBRX Moleculin Biotech, Inc.	Award(A) Performance Based Restricted Stock Units	200,000	-	-	Direct
Nov 12, 2025	MBRX Moleculin Biotech, Inc.	Award(A) Stock option (right to buy)	200,000	-	-	Direct
Nov 4, 2025	MBRX Moleculin Biotech, Inc.	Exercise(M)	8,750	-	-	Direct
Nov 4, 2025	MBRX Moleculin Biotech, Inc.	Tax Payment(F)	2,131	$0.50	$1,059	Direct
Jun 22, 2025	MBRX Moleculin Biotech, Inc.	Tax Payment(F)	430	$0.27	$115	Direct
Jun 22, 2025	MBRX Moleculin Biotech, Inc.	Exercise(M)	1,766	-	-	Direct
Jun 20, 2025	MBRX Moleculin Biotech, Inc.	Tax Payment(F)	263	$0.27	$70	Direct
Jun 20, 2025	MBRX Moleculin Biotech, Inc.	Exercise(M)	1,078	-	-	Direct
Nov 4, 2024	MBRX Moleculin Biotech, Inc.	Award(A) Stock option (right to buy)	40,000	-	-	Direct
Nov 4, 2024	MBRX Moleculin Biotech, Inc.	Award(A) Restricted Stock Units	35,000	-	-	Direct
Oct 25, 2024	MBRX Moleculin Biotech, Inc.	Award(A) Performance Based Restricted Stock Units	5,744	-	-	Direct

1-17 of 17 transactions

About PICKER DONALD H

PICKER DONALD H (SEC CIK 0001266800) files insider reports with the SEC as Chief Science Officer of Moleculin Biotech, Inc. (MBRX).

Signal8 holds 7 ownership filings by PICKER DONALD H, all Form 4s, filed between Nov 6, 2024 and Oct 16, 2026. Those filings report 17 transactions, from Oct 25, 2024 to Oct 15, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on PICKER DONALD H's filings is in HOUSTON, TX.

Recent filings by PICKER DONALD H

Oct 15, 2026: Grant or award of MBRX derivative securities (Form 4, code A).
Aug 3, 2026: Open-market purchase of MBRX shares (Form 4, code P).
Jun 22, 2026: Tax withholding of MBRX shares (Form 4, code F).
Jun 22, 2026: Option exercise of MBRX shares (Form 4, code M).
Jun 20, 2026: Tax withholding of MBRX shares (Form 4, code F).

Other insiders filing for Moleculin Biotech, Inc. (MBRX)

KLEMP WALTER V, CEO and President
Foster Jonathan P., Chief Financial Officer
Yan Joy, Director
Cermak Elizabeth, Director
CANNON MICHAEL D, Director
Climaco John M, Director

How to read Form 4 transaction codes