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Moleculin Biotech, Inc.

MBRX Net buying
CIK 0001659617 #5204 in the set updated 18 Sep 2026
Bought (120 mo)
$721.49K
out of their own pocket, the only kind of buying there is
Sold (120 mo)
$340.60K
$0.00 on a plan · $0.00 straight out of an exercise
Sold at will
$340.60K
2 of 2 sales
Net
+$380.89K
+$380.89K against sales at will

By person

6 insiders · 18 transactions
0.3×

Walter V. Klemp holds only 0.3 times base salary in stock. $208.81K of shares against $565.00K in salary for 2025.

Salary from the company's own proxy. The shares are what Walter V. Klemp last reported holding, valued at $0.37, the price Common Stock was last bought or sold at on the open market here, on 23 Jun 2025.

Insider
Role
Bought
Sold
Net
Holding
Worth
Change
KLEMP WALTER V
CEO and President
$581.09K (8)
$170.30K (1)
+$410.79K
564,340
$208.81K
Priebe Waldemar
10% owner
$170.30K (1)
−$170.30K
2,781,573
$1.03M
−3.5%
Foster Jonathan P.
Chief Financial Officer
$128.65K (4)
+$128.65K
305,673
$113.10K
George Robert E.
Director
$10.94K (2)
+$10.94K
14,660
$5.42K
Northcut Jacqueline
Director
$820.00 (1)
+$820.00
1,000
$370.00
PICKER DONALD H
Chief Science Officer
(1)
$0.00
174,086
$64.41K

No percentages here. This company's share count has moved by a factor of 17.0 over the window, from 3,001,895 to 50,910,476 shares. A split, a merger or a large issue changes what the company is, and a holding measured at one point in that run is not a fraction of it at another.

Insider
Date
Role
Action
Shares
Price
Amount
PICKER DONALD H
3 Aug 2026
Chief Science Officer
Buy
173,333
no price
KLEMP WALTER V
3 Aug 2026
CEO and President
Buy
533,333
no price
Foster Jonathan P.
3 Aug 2026
Chief Financial Officer
Buy
293,333
no price
KLEMP WALTER V
23 Jun 2025
CEO and President
Buy
675,675
$0.37
$250.00K
Foster Jonathan P.
23 Jun 2025
Chief Financial Officer
Buy
270,270
$0.37
$100.00K
KLEMP WALTER V
26 Dec 2023
CEO and President
Buy
188,404
$0.69
$130.00K
George Robert E.
26 Dec 2023
Director
Buy
14,493
$0.69
$10.00K
Foster Jonathan P.
26 Dec 2023
Chief Financial Officer
Buy
28,986
$0.69
$20.00K
KLEMP WALTER V
25 Nov 2022
CEO and President
Buy
45,000
$1.28
$57.63K
KLEMP WALTER V
21 Nov 2022
CEO and President
Buy
22,500
$1.15
$25.87K
KLEMP WALTER V
17 Nov 2022
CEO and President
Buy
24,742
$1.02
$25.26K
KLEMP WALTER V
16 Nov 2022
CEO and President
Buy
85,213
$0.97
$82.61K
Priebe Waldemar
16 Aug 2017
10% owner
Sell
100,000
$1.70
$170.30K
KLEMP WALTER V
16 Aug 2017
Chief Executive Officer
Sell
100,000
$1.70
$170.30K
KLEMP WALTER V
11 May 2017
Chief Executive Officer
Buy
12,000
$0.81
$9.72K
Northcut Jacqueline
5 May 2017
Director
Buy
1,000
$0.82
$820.00
George Robert E.
28 Apr 2017
Director
Buy
1,000
$0.94
$938.40
Foster Jonathan P.
25 Apr 2017
Exec. Vice President & CFO
Buy
10,000
$0.86
$8.65K

What was left out

Form 4 filings counted 121
Amendments (4/A) skipped 4
Filings about a different issuer 0
Unreadable filings 0
Joint filings 0
Sales on a Rule 10b5-1 plan 0
Sales straight out of an exercise 0
Sales at will 2
Transactions with no price 3
Shares from compensation/vesting 573,920
Sales filed before the plan box existed 2
History held since 27 Sep 2016