Donald H. Picker - 20 Jun 2025 Form 4 Insider Report for Moleculin Biotech, Inc. (MBRX)

Role
Chief Science Officer
Signature
/s/ Jonathan P. Foster
Issuer symbol
MBRX
Transactions as of
20 Jun 2025
Net transactions value
-$185
Form type
4
Filing time
23 Jun 2025, 16:34:52 UTC
Previous filing
06 Nov 2024
Next filing
06 Nov 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
PICKER DONALD H Chief Science Officer C/O MOLECULIN BIOTECH, INC., 5300 MEMORIAL DR., SUITE 950, HOUSTON /s/ Jonathan P. Foster 23 Jun 2025 0001266800

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction MBRX Common Stock Options Exercise +1,078 +13% 9,079 20 Jun 2025 Direct F1
transaction MBRX Common Stock Tax liability $70.22 -263 -2.9% $0.2670 8,816 20 Jun 2025 Direct F2
transaction MBRX Common Stock Options Exercise +1,766 +20% 10,582 22 Jun 2025 Direct F1
transaction MBRX Common Stock Tax liability $115 -430 -4.1% $0.2670 10,152 22 Jun 2025 Direct F2

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction MBRX Restricted Stock Units Options Exercise $0 -1,078 -1% $0.000000 106,024 20 Jun 2025 Common Stock 1,078 Direct F1, F3
transaction MBRX Restricted Stock Units Options Exercise $0 -1,766 -1.7% $0.000000 104,258 22 Jun 2025 Common Stock 1,766 Direct F1, F4
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Restricted stock units convert into common stock on a one-for-one basis.
F2 Shares withheld for payment of taxes upon vesting of restricted stock unit awards.
F3 On June 20, 2022, the reporting person was granted 4,312 restricted stock units, vesting in four equal annual installments beginning on the first anniversary of the grant date.
F4 On June 22, 2023, the reporting person was granted 7,063 restricted stock units, vesting in four equal annual installments beginning on the first anniversary of the grant date.