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

Moleculin Biotech, Inc. · MBRX

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

Period1M 3M 6M 1Y 2Y All datashares as filed — not split-adjusted

Reported at this company — common stock

Trade	Reported (ET)	Insider	Shares	Avg price	Total	Owned after	Δ stake	Flags
Aug 3, 2026 PForm 4 →	Aug 5, 4:16 pm EDT	Jonathan P. FosterChief Financial Officer	293,333	—	—	305,673	—
Aug 3, 2026 PForm 4 →	Aug 5, 4:16 pm EDT	Walter V KlempCEO and President, Director	533,333	—	—	564,340	—
Aug 3, 2026 PForm 4 →	Aug 5, 4:15 pm EDT	Donald H PickerChief Science Officer	173,333	—	—	174,086	—
Jun 20, 2026 FMForm 4 →	Jun 24, 9:01 pm EDT	Donald H PickerChief Science Officer	149	$3.03	$103	753	—	late
Jun 20, 2026 FMForm 4 →	Jun 24, 9:00 pm EDT	Walter V KlempCEO and President, Director	635	$3.05	$381	31,007	—	late
Jun 20, 2026 FMForm 4 →	Jun 24, 9:00 pm EDT	Jonathan P. FosterChief Financial Officer	355	$3.02	$217	12,340	—	late

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

Trade	Reported (ET)	Insider	Shares	Avg price	Total	Owned after	Δ stake	Flags
Aug 3, 2026 PForm 4 →	Aug 5, 4:16 pm EDT	Jonathan P. FosterChief Financial Officer	879,999	—	—	1,027,717	—
Aug 3, 2026 AForm 4 →	Aug 5, 4:16 pm EDT	Walter V KlempCEO and President, Director	1,599,999	—	—	1,926,335	—
Aug 3, 2026 PForm 4 →	Aug 5, 4:15 pm EDT	Donald H PickerChief Science Officer	519,999	—	—	539,595	—
Jun 20, 2026 MForm 4 →	Jun 24, 9:01 pm EDT	Donald H PickerChief Science Officer	115	—	—	19,596	—	late
Jun 20, 2026 MForm 4 →	Jun 24, 9:00 pm EDT	Walter V KlempCEO and President, Director	510	—	—	326,336	—	late
Jun 20, 2026 MForm 4 →	Jun 24, 9:00 pm EDT	Jonathan P. FosterChief Financial Officer	283	—	—	147,718	—	late