As of the latest Form 4 filed Jun 24, 2026.
What Moleculin Biotech Inc insiders — officers, directors and 10% owners — have bought and sold in their own stock, straight from their SEC Form 4 filings. Values are shares × the reported transaction price where both are disclosed.
Newest filing first — the 12 most recent filings for MBRX.
| Filed | Trade date | Insider | Transaction | Shares | Price | Value | 10b5-1 | Filing |
|---|---|---|---|---|---|---|---|---|
| 2026-06-24 | 2026-06-22 | PICKER DONALD H Chief Science Officer | FTax | −21.00 | $3.12 | $65.52 | No | Form 4 ↗ |
| 2026-06-24 | 2026-06-22 | PICKER DONALD H, Chief Science Officer | MExercise | +71.00 | — | — | No | Form 4 ↗ |
| 2026-06-24 | 2026-06-22 | KLEMP WALTER V CEO and President | FTax | −88.00 | $3.12 | $274.56 | No | Form 4 ↗ |
| 2026-06-24 | 2026-06-22 | KLEMP WALTER V, CEO and President | MExercise | +360.00 | — | — | No | Form 4 ↗ |
| 2026-06-24 | 2026-06-22 | Foster Jonathan P. Chief Financial Officer | FTax | −41.00 | $3.12 | $127.92 | No | Form 4 ↗ |
| 2026-06-24 | 2026-06-22 | Foster Jonathan P., Chief Financial Officer | MExercise | +174.00 | — | — | No | Form 4 ↗ |
| 2026-06-24 | 2026-06-20 | PICKER DONALD H Chief Science Officer | FTax | −13.00 | $2.88 | $37.44 | No | Form 4 ↗ |
| 2026-06-24 | 2026-06-20 | PICKER DONALD H, Chief Science Officer | MExercise | +44.00 | — | — | No | Form 4 ↗ |
| 2026-06-24 | 2026-06-20 | KLEMP WALTER V CEO and President | FTax | −37.00 | $2.88 | $106.56 | No | Form 4 ↗ |
| 2026-06-24 | 2026-06-20 | KLEMP WALTER V, CEO and President | MExercise | +150.00 | — | — | No | Form 4 ↗ |
| 2026-06-24 | 2026-06-20 | Foster Jonathan P. Chief Financial Officer | FTax | −31.00 | $2.88 | $89.28 | No | Form 4 ↗ |
| 2026-06-24 | 2026-06-20 | Foster Jonathan P., Chief Financial Officer | MExercise | +109.00 | — | — | No | Form 4 ↗ |
Insiders — a company’s officers, directors and holders of more than 10% of its stock — must report any trade in that stock to the SEC on a Form 4 within two business days. Each row here is one transaction from those filings.
The transaction code tells you what happened: Purchase (P) and Sale (S) are open-market trades — the ones markets watch most; Award (A) is a granted stock or unit, Option exercise (M) converts options into shares, and Gift (G) is a transfer for no consideration. Awards, exercises and gifts are largely compensation or administrative, not a directional bet.
One caveat on sales: many are made under a Rule 10b5-1 plan scheduled months in advance, so a sale is not automatically a bearish signal. Insider activity is a noisy input — read it alongside the filings, not on its own.
See also MBRX’s full analysis or the market-wide insider trading feed. The tabs above jump to MBRX’s other SEC data.
Source: SEC Form 4 filings for MBRX, parsed from EDGAR. Transaction prices are as reported in the filing — SEC public-domain data, not market quotes. Values are shares × reported price where both are disclosed; grants and gifts often carry no price. A delayed record of what insiders reported, not a live position or a recommendation.
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