Skip to main content
Signal8
Launch Terminal

Moleculin Biotech, Inc. (MBRX)

Moleculin Biotech, Inc. (MBRX) Insider Trading

Directors, officers and holders of more than 10% of MBRX report their trades in its stock on SEC Form 4, within two business days. Each row below is one Form 4 transaction line. The one-letter code says what kind of transaction it was: only P (purchase) and S (sale) are open-market or private trades; awards, option exercises, tax withholding and gifts carry other codes.

Recent Form 4 transactions

The 50 most recent of 97 transactions on file: 5 with code P, 0 with code S and 45 with other codes.

DateInsiderCodeShares
Oct 15, 2026Foster Jonathan P.M Exercise130,000
Oct 15, 2026Foster Jonathan P.A Award260,000
Oct 15, 2026KLEMP WALTER VM Exercise10,375
Oct 15, 2026KLEMP WALTER VF Tax Payment2,433
Oct 15, 2026Foster Jonathan P.M Exercise6,500
Oct 15, 2026Foster Jonathan P.F Tax Payment1,524
Oct 15, 2026KLEMP WALTER VM Exercise207,500
Oct 15, 2026Foster Jonathan P.A Award260,000
Oct 15, 2026PICKER DONALD HA Award250,000
Oct 15, 2026KLEMP WALTER VA Award415,000
Oct 15, 2026KLEMP WALTER VA Award415,000
Aug 3, 2026KLEMP WALTER VP Purchase26,667
Aug 3, 2026PICKER DONALD HP Purchase8,667
Aug 3, 2026PICKER DONALD HP Purchase519,999
Aug 3, 2026Foster Jonathan P.P Purchase14,667
Aug 3, 2026KLEMP WALTER VA Award1,599,999
Aug 3, 2026Foster Jonathan P.P Purchase879,999
Jun 22, 2026PICKER DONALD HM Exercise4
Jun 22, 2026KLEMP WALTER VM Exercise18
Jun 22, 2026KLEMP WALTER VF Tax Payment4
Jun 22, 2026Foster Jonathan P.M Exercise9
Jun 22, 2026Foster Jonathan P.F Tax Payment2
Jun 22, 2026Foster Jonathan P.M Exercise174
Jun 22, 2026KLEMP WALTER VM Exercise360
Jun 22, 2026PICKER DONALD HM Exercise71
Jun 22, 2026PICKER DONALD HF Tax Payment1
Jun 20, 2026KLEMP WALTER VF Tax Payment2
Jun 20, 2026Foster Jonathan P.M Exercise109
Jun 20, 2026KLEMP WALTER VM Exercise150
Jun 20, 2026PICKER DONALD HM Exercise44
Jun 20, 2026PICKER DONALD HM Exercise2
Jun 20, 2026PICKER DONALD HF Tax Payment1
Jun 20, 2026KLEMP WALTER VM Exercise8
Jun 20, 2026Foster Jonathan P.M Exercise5
Jun 20, 2026Foster Jonathan P.F Tax Payment2
Nov 12, 2025Foster Jonathan P.A Award400,000
Nov 12, 2025KLEMP WALTER VA Award830,000
Nov 12, 2025KLEMP WALTER VA Award750,000
Nov 12, 2025George Robert E.A Award150,000
Nov 12, 2025Climaco John MA Award150,000
Nov 12, 2025CANNON MICHAEL DA Award150,000
Nov 12, 2025Cermak ElizabethA Award150,000
Nov 12, 2025Yan JoyA Award150,000
Nov 12, 2025PICKER DONALD HA Award200,000
Nov 12, 2025PICKER DONALD HA Award200,000
Nov 12, 2025Foster Jonathan P.A Award600,000
Nov 4, 2025PICKER DONALD HM Exercise18
Nov 4, 2025PICKER DONALD HF Tax Payment4
Nov 4, 2025KLEMP WALTER VM Exercise58
Nov 4, 2025KLEMP WALTER VF Tax Payment14

The full Form 4 history is on the MBRX company page (Insider Trades card, View all).

Questions about this data

Which insider transactions are open-market trades?

Code P (open market or private purchase) and code S (open market or private sale). Code F is shares withheld to pay tax on vesting stock, A is an award from the company, M and X are option exercises and G is a gift. None of those is the insider choosing to buy or sell in the market.

How quickly are insider trades reported?

A Form 4 is due before the end of the second business day after the trade. The date shown is the transaction date from the form.

Who has to file Form 4?

Officers, directors and beneficial owners of more than 10% of a class of the company’s registered equity, under Section 16 of the Securities Exchange Act.

Look up any code in the Form 4 transaction code reference, or read Form 4 codes explained.