FOSTER JONATHAN P. (Exec. Vice President and CFO) purchased 1560.7% of their position (270.27K shares) of MOLECULIN BIOTECH, INC. on the open market

Open‑market purchase worth $100.0K — a major conviction buy. The strongest form of insider conviction signal.

P · 1 purchase

FOSTER JONATHAN P.

Filed: 6/23/2025ACC: 0001437749-25-021051

InsiderFOSTER JONATHAN P.CIK 1545414

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IssuerMOLECULIN BIOTECH, INC.CIK 1659617

Officer· Exec. Vice President and CFO

Since Jul 2019

-542.25K

Net shares

Net seller

$457.91

Total sold

Open market trades

1B · 0S

Total transactions

277.31K acquired · 819.56K disposed

Non-Derivative Transactions5

Common Stock

Direct

M · Option Exercise

+2.71K

Price / share

—

Trade value

—

% of position

22.6%

6/20/2025

11.99K→14.70K

Common Stock

Direct

F · Tax Withholding

−661.00

Price / share

$0.27

Trade value

$176.49

% of position

4.5%

6/20/2025

14.70K→14.04K

Common Stock

Direct

M · Option Exercise

+4.33K

Price / share

—

Trade value

—

% of position

30.8%

6/22/2025

14.04K→18.37K

Common Stock

Direct

F · Tax Withholding

−1.05K

Price / share

$0.27

Trade value

$281.42

% of position

5.7%

6/22/2025

18.37K→17.32K

Common Stock

Direct

P · Purchase

+270.27K

Price / share

$0.37

Trade value

$100K

% of position

1560.7%

6/23/2025

17.32K→287.59K

Total

Net shares

+275.59K

Net value

$99.54K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	6/20/2025	M · Option Exercise	+2.71K	—	—	22.6%	11.99K	14.70K
Common Stock Direct	6/20/2025	F · Tax Withholding	−661.00	$0.27	$176.49	4.5%	14.70K	14.04K
Common Stock Direct	6/22/2025	M · Option Exercise	+4.33K	—	—	30.8%	14.04K	18.37K
Common Stock Direct	6/22/2025	F · Tax Withholding	−1.05K	$0.27	$281.42	5.7%	18.37K	17.32K
Common Stock Direct	6/23/2025	P · Purchase	+270.27K	$0.37	$100K	1560.7%	17.32K	287.59K
Total			+275.59K		$99.54K

Derivative Transactions3

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Common Stock

2.71K shares

−2.71K

Strike price

Held after

231.84K

Exercisable

—

6/20/2025

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Common Stock

4.33K shares

−4.33K

Strike price

Held after

227.51K

Exercisable

—

6/22/2025

Series E Warrants

Direct

P · Purchase

Converts to

Common Stock

810.81K shares

−810.81K

Strike price

0.37

Held after

1.04M

Exercisable

—

6/23/2025

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Restricted Stock Units Direct	Common Stock2.71K shares	6/20/2025	M · Option Exercise	−2.71K		—	231.84K
Restricted Stock Units Direct	Common Stock4.33K shares	6/22/2025	M · Option Exercise	−4.33K		—	227.51K
Series E Warrants Direct	Common Stock810.81K shares	6/23/2025	P · Purchase	−810.81K	0.37	—	1.04M