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Moleculin Biotech, Inc. (MBRX) XNAS PHARMACEUTICAL PREPARATIONS Net insider buying (90d)
Latest MBRX Insider Trades
About Moleculin Biotech, Inc. (MBRX) Moleculin Biotech Inc is a late-stage pharmaceutical development company currently evaluating Annamycin, also known as L-Annamycin and by its generic name naxtarubicin. The company has two additional portfolios of technologies for hard-to-treat cancers and viruses with clinical and preclinical research funded by investigators at academic institutions. The Company operates in one reportable segment, which is the development and commercialization of drug products.
Headquarters HOUSTON, TX
Employees 17
Listed 2016
Exchange XNAS https://www.moleculin.com SEC filings for MBRX on EDGAR
90-Day SEC Filing Activity Form 4 transaction type Transactions Shares Total value Open-market purchase 5 2,399,997 - Grant or award 1 1,599,999 Option exercise 12 1,816
MBRX Insider Transactions (Form 4) 64 26 Form 4 filings on record, the earliest from Nov 6, 2024, newest first.
Date Insider Transaction Security Shares Price Value Aug 3, 2026 JF Jonathan P. Foster - Officer Open-market purchase Common Stock 293,333
Recent MBRX Form 8-K Filings 5
MBRX Insider Trading - FAQ
What is the latest insider trade for MBRX? Moleculin Biotech, Inc. (MBRX) had 6 insider filings in the last 90 days, with the most recent on 2026-08-05. The full record for MBRX runs to 26 Form 4 filings, the earliest from 2024-11-06. InsiderAlpha tracks every Form 4, Form 144, and 8-K filing in real time.
How many insiders are buying MBRX stock? 5 insider purchases of MBRX were filed in the last 90 days.
How many insiders are selling MBRX stock? No insider sales of MBRX were filed in the last 90 days.
Where can I see MBRX SEC filings (Form 4, 10-K, 10-Q, 8-K)? This page tracks MBRX Form 4 insider transactions, Form 144 sale notices, and 8-K material event disclosures in one timeline. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
How can I follow MBRX insider buys? Create a free InsiderAlpha account and press Watch on this page to add MBRX to your watchlist. A free account also opens the full scored daily plan with every past day and 3 months of price history. No card is required. Sign up at https://insideralpha.ai/register.
More Health Care Companies with Insider Activity Every Form 4 below links to the original document on SEC EDGAR, so the numbers on this page can be checked against the filing they came from.
Related Companies - Recent Insider Activity What is SEC Form 4? The filing insiders must submit within two business days of a trade, and how to read its transaction codes. Track MBRX insider activity as it files Real-time Form 4 alerts, AI-scored daily trade ideas and 10b5-1 plan flags.
Sign up free 533,333 sh
Market cap $15.19M
P/E ratio -
Dividend yield -
Average volume 1.28M
52 week high $15.75
52 week low $0.16
Today's high -
Today's low -
Open -
Volume -
Previous close $0.78
Shares outstanding 19.48M Market cap
$15.19M
17 employees
MBRX Insider Sentiment - Last 90 Days Share of open-market insider dollar volume that was buying versus selling, from SEC Form 4 filings.
100% Buying 0% Selling
5 insider purchases against 0 sales. No open-market dollar volume was reported, so the split is by trade count.
Most-Active MBRX Insiders - Last 90 Days 8 Tax withholding / forfeiture 6 231
Dollar totals are shown for open-market purchases and sales only. Grants, option exercises, gifts and tax withholding are reported by share count because they are not trades at a market price.
Aug 3, 2026 WK Walter V. Klemp - Officer Open-market purchase Common Stock 533,333 - -
Aug 3, 2026 WK Walter V. Klemp - Officer Grant or award Series I Warrants 1,599,999 - -
Aug 3, 2026 DP Donald H. Picker - Officer Open-market purchase Common Stock 173,333 - -
Aug 3, 2026 DP Donald H. Picker - Officer Open-market purchase Series I Warrants 519,999 - -
Jun 22, 2026 DP Donald H. Picker - Officer Tax withholding / forfeiture Common Stock 21 $3.12 $66
Jun 20, 2026 DP Donald H. Picker - Officer Option exercise Restricted Stock Units 44 $0.00 -
Jun 22, 2026 DP Donald H. Picker - Officer Option exercise Restricted Stock Units 71 $0.00 -
Jun 20, 2026 DP Donald H. Picker - Officer Tax withholding / forfeiture Common Stock 13 $2.88 $37
Jun 20, 2026 WK Walter V. Klemp - Officer Tax withholding / forfeiture Common Stock 37 $2.88 $107
Jun 22, 2026 WK Walter V. Klemp - Officer Tax withholding / forfeiture Common Stock 88 $3.12 $275
Jun 20, 2026 WK Walter V. Klemp - Officer Option exercise Restricted Stock Units 150 $0.00 -
Jun 22, 2026 WK Walter V. Klemp - Officer Option exercise Restricted Stock Units 360 $0.00 -
Jun 20, 2026 JF Jonathan P. Foster - Officer Tax withholding / forfeiture Common Stock 31 $2.88 $89
Jun 22, 2026 JF Jonathan P. Foster - Officer Tax withholding / forfeiture Common Stock 41 $3.12 $128
Nov 12, 2025 MC Michael D. Cannon - Director Grant or award Stock Options (right to buy) 150,000 - -
Nov 12, 2025 JY Joy Yan - Director Grant or award Stock Options (right to buy) 150,000 - -
Nov 12, 2025 RG Robert E. George - Director Grant or award Stock Options (right to buy) 150,000 - -
Nov 12, 2025 JC John M. Climaco - Director Grant or award Stock Options (right to buy) 150,000 - -
Nov 12, 2025 JF Jonathan P. Foster - Officer Grant or award Stock option (right to buy) 600,000 - -
Nov 12, 2025 JF Jonathan P. Foster - Officer Grant or award Performance Based Restricted Stock Units 400,000 - -
Nov 12, 2025 EC Elizabeth Cermak - Director Grant or award Stock Options (right to buy) 150,000 - -
Nov 12, 2025 WK Walter V. Klemp - Officer Grant or award Stock option (right to buy) 830,000 - -
Nov 12, 2025 WK Walter V. Klemp - Officer Grant or award Performance Based Restricted Stock Units 750,000 - -
Nov 12, 2025 DP Donald H. Picker - Officer Grant or award Stock option (right to buy) 200,000 - -
Nov 12, 2025 DP Donald H. Picker - Officer Grant or award Performance Based Restricted Stock Units 200,000 - -
Nov 4, 2025 JF Jonathan P. Foster - Officer Option exercise Restricted Stock Units 20,625 $0.00 -
Nov 4, 2025 WK Walter V. Klemp - Officer Tax withholding / forfeiture Common Stock 7,001 $12.42 $3K
Nov 4, 2025 WK Walter V. Klemp - Officer Option exercise Restricted Stock Units 28,750 $0.00 -
Nov 4, 2025 DP Donald H. Picker - Officer Tax withholding / forfeiture Common Stock 2,131 $12.42 $1K
Nov 4, 2025 DP Donald H. Picker - Officer Option exercise Restricted Stock Units 8,750 $0.00 -
Jun 20, 2025 DP Donald H. Picker - Officer Tax withholding / forfeiture Common Stock 263 $6.68 $70
Jun 22, 2025 DP Donald H. Picker - Officer Tax withholding / forfeiture Common Stock 430 $6.68 $115
Jun 20, 2025 DP Donald H. Picker - Officer Option exercise Restricted Stock Units 1,078 $0.00 -
Jun 22, 2025 DP Donald H. Picker - Officer Option exercise Restricted Stock Units 1,766 $0.00 -
Nov 4, 2024 WK Walter V. Klemp - Officer Grant or award Stock option (right to buy) 100,000 - -
Nov 4, 2024 WK Walter V. Klemp - Officer Grant or award Restricted Stock Units 115,000 - -
Oct 25, 2024 WK Walter V. Klemp - Officer Grant or award Performance Based Restricted Stock Units 43,590 - -
Nov 4, 2024 RG Robert E. George - Director Grant or award Stock option (right to buy) 10,000 - -
Nov 4, 2024 JY Joy Yan - Director Grant or award Stock option (right to buy) 10,000 - -
Nov 4, 2024 DP Donald H. Picker - Officer Grant or award Stock option (right to buy) 40,000 - -
Nov 4, 2024 DP Donald H. Picker - Officer Grant or award Restricted Stock Units 35,000 - -
Oct 25, 2024 DP Donald H. Picker - Officer Grant or award Performance Based Restricted Stock Units 5,744 - -
Nov 4, 2024 MC Michael D. Cannon - Director Grant or award Stock option (right to buy) 10,000 - -
Nov 4, 2024 EC Elizabeth Cermak - Director Grant or award Stock option (right to buy) 10,000 - -
Nov 4, 2024 JF Jonathan P. Foster - Officer Grant or award Stock option (right to buy) 65,000 - -
Oct 25, 2024 JF Jonathan P. Foster - Officer Grant or award Performance Based Restricted Stock Units 19,180 - -
Nov 4, 2024 JC John M. Climaco - Director Grant or award Stock option (right to buy) 10,000 - -
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