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CIK 0001659617 · Non-accelerated filer<br>Smaller reporting company

Moleculin Biotech, Inc.

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Ticker
MBRX
Exchange
Nasdaq
Industry
Pharmaceutical Preparations
FY end
Dec 31
Incorporated
DE
Entity type
operating
EIN
474671997
Phone
713-300-5160
Business address
5300 MEMORIAL DRIVE, SUITE 950, HOUSTON, TX, 77007
Open-market buys, last 90 days
$0
in 0 filings
Open-market sales, last 90 days
$0
in 0 filings

Shares bought or sold at a price by officers, directors and 10% owners (Form 4 codes P and S). Grants, option exercises and tax withholding aren't counted.

Reading 32 more Form 4s from the SEC; this list fills in as they're read.

Date Insider Transaction Shares Price Value Owned after
2026-06-20 KLEMP WALTER V CEO and President Option exercise · Restricted Stock Units −150 326,696
2026-06-20 Foster Jonathan P. Chief Financial Officer Option exercise +109 12,238
2026-06-20 Foster Jonathan P. Chief Financial Officer Shares withheld for taxes −31 $2.88 $89 12,207
2026-06-20 Foster Jonathan P. Chief Financial Officer Option exercise · Restricted Stock Units −109 147,892
2025-11-12 PICKER DONALD H CSO Grant or award · Stock option (right to buy) +200,000 295,508
2025-11-12 PICKER DONALD H CSO Grant or award · Performance Based Restricted Stock Units +200,000 495,508
2025-11-12 Foster Jonathan P. EVP & CFO Grant or award · Stock option (right to buy) +600,000 1,617,695
2025-11-12 Foster Jonathan P. EVP & CFO Grant or award · Performance Based Restricted Stock Units +400,000 2,017,695
2025-11-12 KLEMP WALTER V CEO and President Grant or award · Stock option (right to buy) +830,000 3,210,731
2025-11-12 KLEMP WALTER V CEO and President Grant or award · Performance Based Restricted Stock Units +750,000 3,960,731
2025-11-12 Yan Joy Director Grant or award · Stock Options (right to buy) +150,000 164,001
2025-11-12 Cermak Elizabeth Director Grant or award · Stock Options (right to buy) +150,000 164,668
2025-11-12 CANNON MICHAEL D Director Grant or award · Stock Options (right to buy) +150,000 165,336
2025-11-12 Climaco John M Director Grant or award · Stock Options (right to buy) +150,000 165,169
2025-11-12 George Robert E. Director Grant or award · Stock Options (right to buy) +150,000 165,336
2025-11-04 PICKER DONALD H Chief Science Officer Option exercise +8,750 18,902
2025-11-04 PICKER DONALD H Chief Science Officer Shares withheld for taxes −2,131 $0.50 $1K 16,771
2025-11-04 PICKER DONALD H Chief Science Officer Option exercise · Restricted Stock Units −8,750 95,508
2025-11-04 KLEMP WALTER V CEO and President Option exercise +28,750 772,357
2025-11-04 KLEMP WALTER V CEO and President Shares withheld for taxes −7,001 $0.50 $3K 765,356

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