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Moleculin Biotech, Inc. (MBRX)
NASDAQ: MBRX · Real-Time Price · USD
Healthcare · Biotechnology
6.99+0.49 (+7.54%)
Insider Score
––Not scored
MBRX Insider Score
Insiders here have filed 4 Form 4s in the last 90 days, but all of them are share awards, grants or other non-market transactions. Those are compensation, not a decision to buy, so they are not scored.
MBRX Stock Insider Trading Activity
MBRX stock’s insider trading shows no open-market insider trades by company insiders over the last 6 months.
Not enough price history.
Insider Trading Activity (Form 4 Filings)
An insider trade occurs when an individual that has non-public information about a company buys or sells shares of that company’s stock. Examples of insiders include a company’s executive officers (CEO, CFO, COO), its board of directors, and its major shareholders. Insiders are required to submit their trading activity to the SEC through Form 4 filings.
| Insider | Action | Shares | Avg Cost | Total | Δ Holdings | Held After | Date | Grade | Form 4 |
|---|---|---|---|---|---|---|---|---|---|
| KLEMP WALTER V CEO | Option exercise | 207,500 | — | — | 36.8% | 771,840 | Oct 15, 2026 | — | Form 4 |
| KLEMP WALTER V CEO | Tax withheld | 48,659 | $0.37 | $18.01K | 6.3% | 723,181 | Oct 15, 2026 | — | Form 4 |
| Foster Jonathan P. CFO | Option exercise | 130,000 | — | — | 42.5% | 435,673 | Oct 15, 2026 | — | Form 4 |
| Foster Jonathan P. CFO | Tax withheld | 30,485 | $0.37 | $11.28K | 7.0% | 405,188 | Oct 15, 2026 | — | Form 4 |
| KLEMP WALTER V CEO | Tax withheld | 88 | $3.12 | $274.56 | 0.3% | 31,007 | Jun 22, 2026 | — | Form 4 |
| PICKER DONALD H Other | Option exercise | 71 | — | — | 10.1% | 774 | Jun 22, 2026 | — | Form 4 |
| PICKER DONALD H Other | Tax withheld | 21 | $3.12 | $65.52 | 2.7% | 753 | Jun 22, 2026 | — | Form 4 |
| KLEMP WALTER V CEO | Option exercise | 360 | — | — | 1.2% | 31,088 | Jun 22, 2026 | — | Form 4 |
| Foster Jonathan P. CFO | Option exercise | 174 | — | — | 1.4% | 12,381 | Jun 22, 2026 | — | Form 4 |
| Foster Jonathan P. CFO | Tax withheld | 41 | $3.12 | $127.92 | 0.3% | 12,340 | Jun 22, 2026 | — | Form 4 |
| Foster Jonathan P. CFO | Tax withheld | 31 | $2.88 | $89.28 | 0.3% | 12,207 | Jun 20, 2026 | — | Form 4 |
| PICKER DONALD H Other | Tax withheld | 13 | $2.88 | $37.44 | 1.8% | 703 | Jun 20, 2026 | — | Form 4 |
| PICKER DONALD H Other | Option exercise | 44 | — | — | 6.5% | 716 | Jun 20, 2026 | — | Form 4 |
| Foster Jonathan P. CFO | Option exercise | 109 | — | — | 0.9% | 12,238 | Jun 20, 2026 | — | Form 4 |
| KLEMP WALTER V CEO | Option exercise | 150 | — | — | 0.5% | 30,765 | Jun 20, 2026 | — | Form 4 |
| KLEMP WALTER V CEO | Tax withheld | 37 | $2.88 | $106.56 | 0.1% | 30,728 | Jun 20, 2026 | — | Form 4 |
| PICKER DONALD H Other | Option exercise | 8,750 | — | — | 86.2% | 18,902 | Nov 4, 2025 | — | Form 4 |
| Foster Jonathan P. CFO | Option exercise | 20,625 | — | — | 7.2% | 308,212 | Nov 4, 2025 | — | Form 4 |
| Foster Jonathan P. CFO | Option exercise | 5,023 | $0.50 | $2.50K | 1.6% | 303,189 | Nov 4, 2025 | — | Form 4 |
| KLEMP WALTER V CEO | Tax withheld | 7,001 | $0.50 | $3.48K | 0.9% | 765,356 | Nov 4, 2025 | — | Form 4 |
| PICKER DONALD H Other | Tax withheld | 2,131 | $0.50 | $1.06K | 11.3% | 16,771 | Nov 4, 2025 | — | Form 4 |
| KLEMP WALTER V CEO | Option exercise | 28,750 | — | — | 3.9% | 772,357 | Nov 4, 2025 | — | Form 4 |
What these mean— the action is the SEC’s own Form 4 transaction code. Only a buy or a sell is an open-market trade; the rest are transfers, awards and exercises, which is why they carry no price.
- Tax withheld (F) — Shares withheld to pay tax or an exercise price
- Option exercise (M) — Exercise or conversion of an exempt derivative
Disclaimer — Informational only — not investment advice. Insider transaction data is sourced from SEC Form 4 filings; market data from public feeds and may be delayed. The Insider Score is a proprietary score for research purposes and does not predict future performance. Always do your own research.