Form4insider filings, from the source

Company · CIK 0001659617 · SIC 2834 — Pharmaceutical Preparations · Nasdaq

Moleculin Biotech, Inc. · MBRX

Insider activity reported against this company. All insider holders · On EDGAR ↗

1M3M6M1Y2YAll datashares as filed — not split-adjusted
Open-market buys & salesbuys $20k · 4sales $341k · 2net −$320k
$10k$10k$100k$100k$1M$1MbuyssalesApr 24May 13Jun 1Jun 20Jul 9Jul 28Aug 17

Reported at this company — common stock

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Aug 3, 2026 PForm 4 →Aug 5, 4:16 pm EDTJonathan P. FosterChief Financial Officer293,333——305,673—
Aug 3, 2026 PForm 4 →Aug 5, 4:16 pm EDTWalter V KlempCEO and President, Director533,333——564,340—
Aug 3, 2026 PForm 4 →Aug 5, 4:15 pm EDTDonald H PickerChief Science Officer173,333——174,086—
Jun 20, 2026 FMForm 4 →Jun 24, 9:01 pm EDTDonald H PickerChief Science Officer149$3.03$103753— late
Jun 20, 2026 FMForm 4 →Jun 24, 9:00 pm EDTWalter V KlempCEO and President, Director635$3.05$38131,007— late
Jun 20, 2026 FMForm 4 →Jun 24, 9:00 pm EDTJonathan P. FosterChief Financial Officer355$3.02$21712,340— late
Aug 16, 2017 SForm 4 →Aug 18, 6:01 pm EDTWalter V KlempChief Executive Officer, Director, 10% Owner100,000$1.70$170,300967,724−9.37% plan?
Aug 16, 2017 SForm 4 →Aug 18, 6:00 pm EDTWaldemar Priebe10% Owner100,000$1.70$170,3002,781,573−3.47% plan?
May 11, 2017 PForm 4 →May 12, 5:19 pm EDTWalter V KlempChief Executive Officer, Director, 10% Owner12,000$0.81$9,7201,067,724+1.14% plan?
May 5, 2017 PForm 4 →May 5, 4:30 pm EDTJacqueline NorthcutDirector1,000$0.82$8201,000— plan?
Apr 28, 2017 PForm 4 →Apr 28, 4:31 pm EDTRobert E. GeorgeDirector1,000$0.9384$9381,000— plan?
Apr 25, 2017 PForm 4 →Apr 26, 4:30 pm EDTJonathan P. FosterExec. Vice President & CFO10,000$0.8649$8,64910,000— plan?

Reported at this company — derivatives (options, RSUs, warrants)

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Aug 3, 2026 PForm 4 →Aug 5, 4:16 pm EDTJonathan P. FosterChief Financial Officer879,999——1,027,717—
Aug 3, 2026 AForm 4 →Aug 5, 4:16 pm EDTWalter V KlempCEO and President, Director1,599,999——1,926,335—
Aug 3, 2026 PForm 4 →Aug 5, 4:15 pm EDTDonald H PickerChief Science Officer519,999——539,595—
Jun 20, 2026 MForm 4 →Jun 24, 9:01 pm EDTDonald H PickerChief Science Officer115——19,596— late
Jun 20, 2026 MForm 4 →Jun 24, 9:00 pm EDTWalter V KlempCEO and President, Director510——326,336— late
Jun 20, 2026 MForm 4 →Jun 24, 9:00 pm EDTJonathan P. FosterChief Financial Officer283——147,718— late
Jun 6, 2018 AForm 4 →Jun 8, 5:27 pm EDTMichael D CannonDirector35,000——70,000—
Jun 6, 2018 AForm 4 →Jun 8, 5:27 pm EDTJohn M ClimacoDirector35,000——55,000—
Jun 6, 2018 AForm 4 →Jun 8, 5:25 pm EDTDonald H PickerChief Science Officer75,000——135,000—
Jun 6, 2018 AForm 4 →Jun 8, 5:25 pm EDTRobert E. GeorgeDirector35,000——70,000—
Jun 6, 2018 AForm 4 →Jun 8, 5:24 pm EDTJonathan P. FosterChief Financial Officer301,000——846,000—
Jun 6, 2018 AForm 4 →Jun 8, 5:24 pm EDTWalter V KlempCEO and President, Director603,000——943,000—
Oct 3, 2017 AForm 4 →Oct 5, 6:04 pm EDTDonald H PickerChief Science Officer60,000——60,000—
Oct 3, 2017 AForm 4 →Oct 5, 6:02 pm EDTJonathan P. FosterChief Financial Officer145,000——545,000—
Oct 3, 2017 AForm 4 →Oct 5, 5:59 pm EDTWalter V KlempCEO, Director, 10% Owner340,000——340,000—
Jul 24, 2017 AForm 4 →Jul 26, 9:10 pm EDTMichael D CannonDirector15,000——35,000—
Jul 24, 2017 AForm 4 →Jul 26, 9:08 pm EDTRobert E. GeorgeDirector15,000——35,000—
Jul 24, 2017 AForm 4 →Jul 26, 9:06 pm EDTJohn M ClimacoDirector20,000——20,000—
Sep 23, 2016 AForm 4 →Sep 27, 8:58 pm EDTMichael D CannonDirector20,000——20,000—
Sep 23, 2016 AForm 4 →Sep 27, 8:58 pm EDTJacqueline NorthcutDirector20,000——20,000—
Sep 23, 2016 AForm 4 →Sep 27, 8:58 pm EDTRobert E. GeorgeDirector20,000——20,000—
Aug 19, 2016 AForm 4 →Aug 23, 4:46 pm EDTJonathan P. FosterExec. Vice President & CFO400,000——400,000—