Filings under MBRX by Metabasis Therapeutics Inc (CIK 0001053221) from Jan 23, 2006 to Jan 27, 2010 belong to a different issuer and are not shown.
The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.
| Date | Insider | Role | Action | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Aug 3, 2026 | Foster Jonathan P. | Chief Financial Officer | Buy(P) | 293K | — | — |
| Aug 3, 2026 | Foster Jonathan P. | Chief Financial Officer | Buy(P) | 880K | — | — |
| Aug 3, 2026 | Klemp Walter V | CEO and President, Director | Buy(P) | 533K | — | — |
| Aug 3, 2026 | Klemp Walter V | CEO and President, Director | Grant(A) | 1.6M | — | — |
| Aug 3, 2026 | Picker Donald H | Chief Science Officer | Buy(P) | 173K | — | — |
| Aug 3, 2026 | Picker Donald H | Chief Science Officer | Buy(P) | 520K | — | — |
| Jun 22, 2026 | Picker Donald H | Chief Science Officer | Option exercise(M) | 71 | — | — |
| Jun 22, 2026 | Picker Donald H | Chief Science Officer | Tax withholding(F) | 21 | $3.12 | $66 |
| Jun 22, 2026 | Picker Donald H | Chief Science Officer | Option exercise(M) | 71 | — | $0 |
| Jun 22, 2026 | Foster Jonathan P. | Chief Financial Officer | Option exercise(M) | 174 | — | — |
| Jun 22, 2026 | Foster Jonathan P. | Chief Financial Officer | Tax withholding(F) | 41 | $3.12 | $128 |
| Jun 22, 2026 | Foster Jonathan P. | Chief Financial Officer | Option exercise(M) | 174 | — | $0 |
| Jun 22, 2026 | Klemp Walter V | CEO and President, Director | Option exercise(M) | 360 | — | — |
| Jun 22, 2026 | Klemp Walter V | CEO and President, Director | Tax withholding(F) | 88 | $3.12 | $275 |
| Jun 22, 2026 | Klemp Walter V | CEO and President, Director | Option exercise(M) | 360 | — | $0 |
| Jun 20, 2026 | Picker Donald H | Chief Science Officer | Option exercise(M) | 44 | — | — |
| Jun 20, 2026 | Picker Donald H | Chief Science Officer | Tax withholding(F) | 13 | $2.88 | $37 |
| Jun 20, 2026 | Picker Donald H | Chief Science Officer | Option exercise(M) | 44 | — | $0 |
| Jun 20, 2026 | Foster Jonathan P. | Chief Financial Officer | Option exercise(M) | 109 | — | — |
| Jun 20, 2026 | Foster Jonathan P. | Chief Financial Officer | Tax withholding(F) | 31 | $2.88 | $89 |
| Jun 20, 2026 | Foster Jonathan P. | Chief Financial Officer | Option exercise(M) | 109 | — | $0 |
| Jun 20, 2026 | Klemp Walter V | CEO and President, Director | Option exercise(M) | 150 | — | — |
| Jun 20, 2026 | Klemp Walter V | CEO and President, Director | Tax withholding(F) | 37 | $2.88 | $107 |
| Jun 20, 2026 | Klemp Walter V | CEO and President, Director | Option exercise(M) | 150 | — | $0 |
| Nov 12, 2025 | George Robert E. | Director | Grant(A) | 150K | — | — |
| Nov 12, 2025 | Climaco John M | Director | Grant(A) | 150K | — | — |
| Nov 12, 2025 | Cannon Michael D | Director | Grant(A) | 150K | — | — |
| Nov 12, 2025 | Cermak Elizabeth | Director | Grant(A) | 150K | — | — |
| Nov 12, 2025 | Yan Joy | Director | Grant(A) | 150K | — | — |
| Nov 12, 2025 | Klemp Walter V | CEO and President, Director | Grant(A) | 830K | — | — |
| Nov 12, 2025 | Klemp Walter V | CEO and President, Director | Grant(A) | 750K | — | — |
| Nov 12, 2025 | Foster Jonathan P. | EVP & CFO | Grant(A) | 600K | — | — |
| Nov 12, 2025 | Foster Jonathan P. | EVP & CFO | Grant(A) | 400K | — | — |
| Nov 12, 2025 | Picker Donald H | CSO | Grant(A) | 200K | — | — |
| Nov 12, 2025 | Picker Donald H | CSO | Grant(A) | 200K | — | — |
| Nov 4, 2025 | Foster Jonathan P. | Chief Financial Officer | Option exercise(M) | 21K | — | — |
| Nov 4, 2025 | Foster Jonathan P. | Chief Financial Officer | Option exercise(M) | 5K | $0.50 | $3K |
| Nov 4, 2025 | Foster Jonathan P. | Chief Financial Officer | Option exercise(M) | 21K | — | $0 |
| Nov 4, 2025 | Klemp Walter V | CEO and President, Director | Option exercise(M) | 29K | — | — |
| Nov 4, 2025 | Klemp Walter V | CEO and President, Director | Tax withholding(F) | 7K | $0.50 | $4K |
| Nov 4, 2025 | Klemp Walter V | CEO and President, Director | Option exercise(M) | 29K | — | $0 |
| Nov 4, 2025 | Picker Donald H | Chief Science Officer | Tax withholding(F) | 2K | $0.50 | $1K |
| Nov 4, 2025 | Picker Donald H | Chief Science Officer | Option exercise(M) | 9K | — | — |
| Nov 4, 2025 | Picker Donald H | Chief Science Officer | Option exercise(M) | 9K | — | $0 |
| Jun 23, 2025 | Klemp Walter V | CEO and President, Director | Buy(P) | 676K | $0.37 | $250K |
| Jun 23, 2025 | Klemp Walter V | CEO and President, Director | Buy(P) | 2.0M | — | — |
| Jun 23, 2025 | Foster Jonathan P. | Chief Financial Officer | Buy(P) | 270K | $0.37 | $100K |
| Jun 23, 2025 | Foster Jonathan P. | Chief Financial Officer | Buy(P) | 811K | — | — |
| Jun 22, 2025 | Picker Donald H | Chief Science Officer | Tax withholding(F) | 430 | $0.27 | $116 |
| Jun 22, 2025 | Picker Donald H | Chief Science Officer | Option exercise(M) | 2K | — | — |
| Jun 22, 2025 | Picker Donald H | Chief Science Officer | Option exercise(M) | 2K | — | $0 |
| Jun 22, 2025 | Klemp Walter V | CEO and President, Director | Tax withholding(F) | 2K | $0.27 | $591 |
| Jun 22, 2025 | Klemp Walter V | CEO and President, Director | Option exercise(M) | 9K | — | — |
| Jun 22, 2025 | Klemp Walter V | CEO and President, Director | Option exercise(M) | 9K | — | $0 |
| Jun 22, 2025 | Foster Jonathan P. | Chief Financial Officer | Tax withholding(F) | 1K | $0.27 | $285 |
| Jun 22, 2025 | Foster Jonathan P. | Chief Financial Officer | Option exercise(M) | 4K | — | — |
| Jun 22, 2025 | Foster Jonathan P. | Chief Financial Officer | Option exercise(M) | 4K | — | $0 |
| Jun 20, 2025 | Picker Donald H | Chief Science Officer | Option exercise(M) | 1K | — | — |
| Jun 20, 2025 | Picker Donald H | Chief Science Officer | Tax withholding(F) | 263 | $0.27 | $71 |
| Jun 20, 2025 | Picker Donald H | Chief Science Officer | Option exercise(M) | 1K | — | $0 |
| Jun 20, 2025 | Klemp Walter V | CEO and President, Director | Option exercise(M) | 4K | — | — |
| Jun 20, 2025 | Klemp Walter V | CEO and President, Director | Tax withholding(F) | 914 | $0.27 | $247 |
| Jun 20, 2025 | Klemp Walter V | CEO and President, Director | Option exercise(M) | 4K | — | $0 |
| Jun 20, 2025 | Foster Jonathan P. | Chief Financial Officer | Option exercise(M) | 3K | — | — |
| Jun 20, 2025 | Foster Jonathan P. | Chief Financial Officer | Tax withholding(F) | 661 | $0.27 | $178 |
| Jun 20, 2025 | Foster Jonathan P. | Chief Financial Officer | Option exercise(M) | 3K | — | $0 |
| Jun 16, 2025 | Klemp Walter V | CEO and President, Director | Option exercise(M) | 2K | — | — |
| Jun 16, 2025 | Klemp Walter V | CEO and President, Director | Tax withholding(F) | 406 | $0.69 | $280 |
| Jun 16, 2025 | Klemp Walter V | CEO and President, Director | Option exercise(M) | 2K | — | $0 |
| Jun 16, 2025 | Foster Jonathan P. | Chief Financial Officer | Tax withholding(F) | 203 | $0.69 | $140 |
| Jun 16, 2025 | Foster Jonathan P. | Chief Financial Officer | Option exercise(M) | 833 | — | — |
| Jun 16, 2025 | Foster Jonathan P. | Chief Financial Officer | Option exercise(M) | 833 | — | $0 |
| Nov 4, 2024 | Klemp Walter V | CEO and President, Director | Grant(A) | 100K | — | — |
| Nov 4, 2024 | Klemp Walter V | CEO and President, Director | Grant(A) | 115K | — | — |
| Nov 4, 2024 | Foster Jonathan P. | Chief Financial Officer | Grant(A) | 83K | — | — |
| Nov 4, 2024 | Foster Jonathan P. | Chief Financial Officer | Grant(A) | 65K | — | — |
| Nov 4, 2024 | Picker Donald H | Chief Science Officer | Grant(A) | 40K | — | — |
| Nov 4, 2024 | Picker Donald H | Chief Science Officer | Grant(A) | 35K | — | — |
| Nov 4, 2024 | Cannon Michael D | Director | Grant(A) | 10K | — | — |
| Nov 4, 2024 | George Robert E. | Director | Grant(A) | 10K | — | — |
| Nov 4, 2024 | Climaco John M | Director | Grant(A) | 10K | — | — |
| Nov 4, 2024 | Cermak Elizabeth | Director | Grant(A) | 10K | — | — |
| Nov 4, 2024 | Yan Joy | Director | Grant(A) | 10K | — | — |
| Oct 25, 2024 | Klemp Walter V | CEO and President, Director | Grant(A) | 44K | — | — |
| Oct 25, 2024 | Foster Jonathan P. | Chief Financial Officer | Grant(A) | 19K | — | — |
| Oct 25, 2024 | Picker Donald H | Chief Science Officer | Grant(A) | 6K | — | — |
| Jul 2, 2024 | Klemp Walter V | CEO and President, Director | Tax withholding(F) | 240 | $3.57 | $857 |
| Jul 2, 2024 | Klemp Walter V | CEO and President, Director | Option exercise(M) | 982 | — | — |
| Jul 2, 2024 | Klemp Walter V | CEO and President, Director | Option exercise(M) | 982 | — | $0 |
| Jun 22, 2024 | Klemp Walter V | CEO and President, Director | Tax withholding(F) | 2K | $3.74 | $8K |
| Jun 22, 2024 | Klemp Walter V | CEO and President, Director | Option exercise(M) | 9K | — | — |
| Jun 22, 2024 | Klemp Walter V | CEO and President, Director | Option exercise(M) | 9K | — | $0 |
| Jun 22, 2024 | Foster Jonathan P. | Chief Financial Officer | Tax withholding(F) | 1K | $3.74 | $4K |
| Jun 22, 2024 | Foster Jonathan P. | Chief Financial Officer | Option exercise(M) | 4K | — | — |
| Jun 22, 2024 | Foster Jonathan P. | Chief Financial Officer | Option exercise(M) | 4K | — | $0 |
| Jun 22, 2024 | Picker Donald H | Chief Science Officer | Option exercise(M) | 2K | — | — |
| Jun 22, 2024 | Picker Donald H | Chief Science Officer | Tax withholding(F) | 524 | $3.74 | $2K |
| Jun 22, 2024 | Picker Donald H | Chief Science Officer | Option exercise(M) | 2K | — | $0 |
| Jun 20, 2024 | Klemp Walter V | CEO and President, Director | Option exercise(M) | 4K | — | — |
| Jun 20, 2024 | Klemp Walter V | CEO and President, Director | Tax withholding(F) | 914 | $3.78 | $3K |
Insider transactions sourced from SEC EDGAR Form 4 filings, normalized within minutes of acceptance. "Buy"/"Sell" mark open-market transactions (codes P/S), the tradeable signal. Awards, option exercises and tax-withholding are shown with their raw code. All data is public domain.
Issuer: Moleculin Biotech, Inc., SEC CIK 0001659617. The symbol on a Form 4 is typed by the filer, so this page follows the issuer with the newest filing under MBRX and shows every filing by that issuer. Earlier filings under the same symbol by another issuer are left out.
Coverage: Form 4 filings indexed 2006-01-02 → 2026-09-12. Earlier history is backfilling; this window widens as it deepens.
Programmatic access via the Arkolith API & MCP server (insider.transactions, insider.company).
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