WALTER KLEMP V. - 16 Jun 2022 Form 4 Insider Report for Moleculin Biotech, Inc. (MBRX)

Role: CEO and President, Director
Signature: /s/ Walter V. Klemp
Issuer symbol: MBRX
Transactions as of: 16 Jun 2022
Net transactions value: -$8,097
Form type: 4
Filing time: 21 Jun 2022, 20:08:20 UTC
Previous filing: 17 Dec 2021
Next filing: 15 Jul 2022
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	MBRX	Common Stock	Options Exercise		+25,000	+13%		217,401	16 Jun 2022	Direct	F1
transaction	MBRX	Common Stock	Tax liability	$8,097	-6,088	-2.8%	$1.33	211,313	16 Jun 2022	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	-25,000	-3.6%	$0.000000	675,862	16 Jun 2022	Common Stock	25,000		Direct	F1, F3

* 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 16, 2021, the reporting person was granted 100,000 restricted stock units, vesting in four equal annual installments beginning on the first anniversary of the grant date.