In the last 12 months, insiders at Moleculin Biotech, Inc. ($MBRX) filed 89 transactions with the SEC: 4 open-market purchases totaling $350,000 and 0 sales totaling $0. Net insider sentiment: net buying.
Moleculin Biotech, Inc. operates in the Pharmaceutical preparations industry (Life sciences sector).
Most Active Insiders
- KLEMP WALTER V (CEO and President) — 31 transactions totaling $268,769
- Foster Jonathan P. (Chief Financial Officer) — 26 transactions totaling $110,247
- PICKER DONALD H (Chief Science Officer) — 18 transactions totaling $4,414
- George Robert E. (Director) — 2 transactions totaling $0
- Cermak Elizabeth (Director) — 2 transactions totaling $0
View all SEC Filings for Moleculin Biotech, Inc. (MBRX).
Set Up your own filters →Recent Insider Transactions
| Transaction Date | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|
| Nov. 12, 2025 | George Robert E. | Director | A | Stock Options (right to buy) | 150000 | $0.00 | 165,336.0000 | 50,910,476 | 978.09% | 0.29% |
| Nov. 12, 2025 | Climaco John M | Director | A | Stock Options (right to buy) | 150000 | $0.00 | 165,169.0000 | 50,910,476 | 988.86% | 0.29% |
| Nov. 12, 2025 | CANNON MICHAEL D | Director | A | Stock Options (right to buy) | 150000 | $0.00 | 165,336.0000 | 50,910,476 | 978.09% | 0.29% |
| Nov. 12, 2025 | Cermak Elizabeth | Director | A | Stock Options (right to buy) | 150000 | $0.00 | 164,668.0000 | 50,910,476 | 1022.63% | 0.29% |
| Nov. 12, 2025 | Yan Joy | Director | A | Stock Options (right to buy) | 150000 | $0.00 | 164,001.0000 | 50,910,476 | 1071.35% | 0.29% |
| Nov. 12, 2025 | KLEMP WALTER V | CEO and President | A | Performance Based Restricted Stock Units | 750000 | $0.00 | 3,960,731.0000 | 50,910,476 | 23.36% | 1.47% |
| Nov. 12, 2025 | KLEMP WALTER V | CEO and President | A | Stock option (right to buy) | 830000 | $0.00 | 3,210,731.0000 | 50,910,476 | 34.86% | 1.63% |
| Nov. 12, 2025 | Foster Jonathan P. | EVP & CFO | A | Performance Based Restricted Stock Units | 400000 | $0.00 | 2,017,695.0000 | 50,910,476 | 24.73% | 0.79% |
| Nov. 12, 2025 | Foster Jonathan P. | EVP & CFO | A | Stock option (right to buy) | 600000 | $0.00 | 1,617,695.0000 | 50,910,476 | 58.96% | 1.18% |
| Nov. 12, 2025 | PICKER DONALD H | CSO | A | Performance Based Restricted Stock Units | 200000 | $0.00 | 495,508.0000 | 50,910,476 | 67.68% | 0.39% |
| Nov. 12, 2025 | PICKER DONALD H | CSO | A | Stock option (right to buy) | 200000 | $0.00 | 295,508.0000 | 50,910,476 | 209.41% | 0.39% |
| Nov. 4, 2025 | Foster Jonathan P. | Chief Financial Officer | M | Restricted Stock Units | 20625 | $0.00 | 1,017,695.0000 | 14,000,494 | 1.99% | 0.15% |
| Nov. 4, 2025 | Foster Jonathan P. | Chief Financial Officer | M | Common Stock | 5023 | $0.50 | 303,189.0000 | 14,000,494 | 1.63% | 0.04% |
| Nov. 4, 2025 | Foster Jonathan P. | Chief Financial Officer | M | Common Stock | 20625 | $0.00 | 308,212.0000 | 14,000,494 | 7.17% | 0.15% |
| Nov. 4, 2025 | KLEMP WALTER V | CEO and President | M | Restricted Stock Units | 28750 | $0.00 | 2,380,731.0000 | 14,000,494 | 1.19% | 0.21% |
| Nov. 4, 2025 | KLEMP WALTER V | CEO and President | F | Common Stock | 7001 | $0.50 | 765,356.0000 | 14,000,494 | 0.91% | 0.05% |
| Nov. 4, 2025 | KLEMP WALTER V | CEO and President | M | Common Stock | 28750 | $0.00 | 772,357.0000 | 14,000,494 | 3.87% | 0.21% |
| Nov. 4, 2025 | PICKER DONALD H | Chief Science Officer | M | Restricted Stock Units | 8750 | $0.00 | 95,508.0000 | 14,000,494 | 8.39% | 0.06% |
| Nov. 4, 2025 | PICKER DONALD H | Chief Science Officer | F | Common Stock | 2131 | $0.50 | 16,771.0000 | 14,000,494 | 11.27% | 0.02% |
| Nov. 4, 2025 | PICKER DONALD H | Chief Science Officer | M | Common Stock | 8750 | $0.00 | 18,902.0000 | 14,000,494 | 86.19% | 0.06% |
| June 20, 2025 | PICKER DONALD H | Chief Science Officer | M | Restricted Stock Units | 1078 | $0.00 | 106,024.0000 | 14,000,494 | 1.01% | 0.01% |
| June 22, 2025 | PICKER DONALD H | Chief Science Officer | M | Restricted Stock Units | 1766 | $0.00 | 104,258.0000 | 14,000,494 | 1.67% | 0.01% |
| June 20, 2025 | Foster Jonathan P. | Chief Financial Officer | M | Common Stock | 2711 | $0.00 | 14,704.0000 | 14,000,494 | 22.60% | 0.02% |
| June 20, 2025 | Foster Jonathan P. | Chief Financial Officer | F | Common Stock | 661 | $0.27 | 14,043.0000 | 14,000,494 | 4.50% | 0.00% |
| June 22, 2025 | Foster Jonathan P. | Chief Financial Officer | M | Common Stock | 4328 | $0.00 | 18,371.0000 | 14,000,494 | 30.82% | 0.03% |
| June 22, 2025 | Foster Jonathan P. | Chief Financial Officer | F | Common Stock | 1054 | $0.27 | 17,317.0000 | 14,000,494 | 5.74% | 0.01% |
| June 23, 2025 | Foster Jonathan P. | Chief Financial Officer | P | Common Stock | 270270 | $0.37 | 287,587.0000 | 14,000,494 | 1560.72% | 1.93% |
| June 20, 2025 | Foster Jonathan P. | Chief Financial Officer | M | Restricted Stock Units | 2711 | $0.00 | 231,838.0000 | 14,000,494 | 1.16% | 0.02% |
| June 22, 2025 | Foster Jonathan P. | Chief Financial Officer | M | Restricted Stock Units | 4328 | $0.00 | 227,510.0000 | 14,000,494 | 1.87% | 0.03% |
| June 23, 2025 | Foster Jonathan P. | Chief Financial Officer | P | Series E Warrants | 810810 | $0.00 | 1,038,320.0000 | 14,000,494 | 43.85% | 5.79% |
| June 20, 2025 | KLEMP WALTER V | CEO and President | M | Common Stock | 3750 | $0.00 | 62,046.0000 | 14,000,494 | 6.43% | 0.03% |
| June 20, 2025 | KLEMP WALTER V | CEO and President | F | Common Stock | 914 | $0.27 | 61,132.0000 | 14,000,494 | 1.47% | 0.01% |
| June 22, 2025 | KLEMP WALTER V | CEO and President | M | Common Stock | 8990 | $0.00 | 70,122.0000 | 14,000,494 | 14.71% | 0.06% |
| June 22, 2025 | KLEMP WALTER V | CEO and President | F | Common Stock | 2190 | $0.27 | 67,932.0000 | 14,000,494 | 3.12% | 0.02% |
| June 23, 2025 | KLEMP WALTER V | CEO and President | P | Common Stock | 675675 | $0.37 | 743,607.0000 | 14,000,494 | 994.63% | 4.83% |
| June 20, 2025 | KLEMP WALTER V | CEO and President | M | Restricted Stock Units | 3750 | $0.00 | 391,446.0000 | 14,000,494 | 0.95% | 0.03% |
| June 22, 2025 | KLEMP WALTER V | CEO and President | M | Restricted Stock Units | 8990 | $0.00 | 382,456.0000 | 14,000,494 | 2.30% | 0.06% |
| June 23, 2025 | KLEMP WALTER V | CEO and President | P | Series E Warrants | 2027025 | $0.00 | 2,409,481.0000 | 14,000,494 | 45.69% | 14.48% |
| June 20, 2025 | PICKER DONALD H | Chief Science Officer | M | Common Stock | 1078 | $0.00 | 9,079.0000 | 14,000,494 | 13.47% | 0.01% |
| June 20, 2025 | PICKER DONALD H | Chief Science Officer | F | Common Stock | 263 | $0.27 | 8,816.0000 | 14,000,494 | 2.90% | 0.00% |
| June 22, 2025 | PICKER DONALD H | Chief Science Officer | M | Common Stock | 1766 | $0.00 | 10,582.0000 | 14,000,494 | 20.03% | 0.01% |
| June 22, 2025 | PICKER DONALD H | Chief Science Officer | F | Common Stock | 430 | $0.27 | 10,152.0000 | 14,000,494 | 4.06% | 0.00% |
| June 16, 2025 | KLEMP WALTER V | CEO and President | M | Restricted Stock Units | 1667 | $0.00 | 370,075.0000 | 14,000,494 | 0.45% | 0.01% |
| June 16, 2025 | KLEMP WALTER V | CEO and President | F | Common Stock | 406 | $0.69 | 58,296.0000 | 14,000,494 | 0.69% | 0.00% |
| June 16, 2025 | KLEMP WALTER V | CEO and President | M | Common Stock | 1667 | $0.00 | 58,702.0000 | 14,000,494 | 2.92% | 0.01% |
| June 16, 2025 | Foster Jonathan P. | Chief Financial Officer | M | Common Stock | 833 | $0.00 | 12,196.0000 | 14,000,494 | 7.33% | 0.01% |
| June 16, 2025 | Foster Jonathan P. | Chief Financial Officer | F | Common Stock | 203 | $0.69 | 11,993.0000 | 14,000,494 | 1.66% | 0.00% |
| June 16, 2025 | Foster Jonathan P. | Chief Financial Officer | M | Restricted Stock Units | 833 | $0.00 | 230,684.0000 | 14,000,494 | 0.36% | 0.01% |
| Oct. 25, 2024 | Foster Jonathan P. | Chief Financial Officer | A | Performance Based Restricted Stock Units | 19180 | $0.00 | 231,517.0000 | 0 | 9.03% | 0.00% |
| Nov. 4, 2024 | Foster Jonathan P. | Chief Financial Officer | A | Restricted Stock Units | 82500 | $0.00 | 212,337.0000 | 0 | 63.54% | 0.00% |
| Nov. 4, 2024 | Foster Jonathan P. | Chief Financial Officer | A | Stock option (right to buy) | 65000 | $0.00 | 129,837.0000 | 0 | 100.25% | 0.00% |
| Oct. 25, 2024 | KLEMP WALTER V | CEO and President | A | Performance Based Restricted Stock Units | 43590 | $0.00 | 371,742.0000 | 0 | 13.28% | 0.00% |
| Nov. 4, 2024 | CANNON MICHAEL D | Director | A | Stock option (right to buy) | 10000 | $0.00 | 15,336.0000 | 0 | 187.41% | 0.00% |
| Nov. 4, 2024 | PICKER DONALD H | Chief Science Officer | A | Stock option (right to buy) | 40000 | $0.00 | 66,358.0000 | 0 | 151.76% | 0.00% |
| Nov. 4, 2024 | PICKER DONALD H | Chief Science Officer | A | Restricted Stock Units | 35000 | $0.00 | 101,358.0000 | 0 | 52.74% | 0.00% |
| Oct. 25, 2024 | PICKER DONALD H | Chief Science Officer | A | Performance Based Restricted Stock Units | 5744 | $0.00 | 107,102.0000 | 0 | 5.67% | 0.00% |
| Nov. 4, 2024 | KLEMP WALTER V | CEO and President | A | Restricted Stock Units | 115000 | $0.00 | 328,152.0000 | 0 | 53.95% | 0.00% |
| Nov. 4, 2024 | KLEMP WALTER V | CEO and President | A | Stock option (right to buy) | 100000 | $0.00 | 213,152.0000 | 0 | 88.38% | 0.00% |
| Nov. 4, 2024 | Cermak Elizabeth | Director | A | Stock option (right to buy) | 10000 | $0.00 | 14,668.0000 | 0 | 214.22% | 0.00% |
| Nov. 4, 2024 | Climaco John M | Director | A | Stock option (right to buy) | 10000 | $0.00 | 15,169.0000 | 0 | 193.46% | 0.00% |
| Nov. 4, 2024 | George Robert E. | Director | A | Stock option (right to buy) | 10000 | $0.00 | 15,336.0000 | 0 | 187.41% | 0.00% |
| Nov. 4, 2024 | Yan Joy | Director | A | Stock option (right to buy) | 10000 | $0.00 | 14,001.0000 | 0 | 249.94% | 0.00% |
| July 2, 2024 | KLEMP WALTER V | CEO and President | F | Common Stock | 240 | $3.57 | 57,035.0000 | 0 | 0.42% | 0.00% |
| July 2, 2024 | KLEMP WALTER V | CEO and President | M | Common Stock | 982 | $0.00 | 57,275.0000 | 0 | 1.74% | 0.00% |
| July 2, 2024 | KLEMP WALTER V | CEO and President | M | Restricted Stock Units | 982 | $0.00 | 113,152.0000 | 0 | 0.86% | 0.00% |
| June 22, 2024 | KLEMP WALTER V | CEO and President | M | Common Stock | 8990 | $0.00 | 58,483.0000 | 0 | 18.16% | 0.00% |
| June 22, 2024 | PICKER DONALD H | Chief Science Officer | M | Common Stock | 1766 | $0.00 | 8,525.0000 | 0 | 26.13% | 0.00% |
| June 22, 2024 | PICKER DONALD H | Chief Science Officer | F | Common Stock | 524 | $3.74 | 8,001.0000 | 0 | 7.01% | 0.00% |
| June 22, 2024 | PICKER DONALD H | Chief Science Officer | M | Restricted Stock Units | 1766 | $0.00 | 26,358.0000 | 0 | 6.28% | 0.00% |
| June 22, 2024 | Foster Jonathan P. | Chief Financial Officer | M | Common Stock | 4329 | $0.00 | 12,416.0000 | 0 | 53.53% | 0.00% |
| June 22, 2024 | Foster Jonathan P. | Chief Financial Officer | F | Common Stock | 1053 | $3.74 | 11,363.0000 | 0 | 8.48% | 0.00% |
| June 22, 2024 | Foster Jonathan P. | Chief Financial Officer | M | Restricted Stock Units | 4329 | $0.00 | 64,837.0000 | 0 | 6.26% | 0.00% |
| June 22, 2024 | KLEMP WALTER V | CEO and President | F | Common Stock | 2190 | $3.74 | 56,293.0000 | 0 | 3.74% | 0.00% |
| June 22, 2024 | KLEMP WALTER V | CEO and President | M | Restricted Stock Units | 8990 | $0.00 | 114,134.0000 | 0 | 7.30% | 0.00% |
| June 20, 2024 | PICKER DONALD H | Chief Science Officer | M | Common Stock | 1078 | $0.00 | 7,079.0000 | 0 | 17.96% | 0.00% |
| June 20, 2024 | Foster Jonathan P. | Chief Financial Officer | M | Restricted Stock Units | 2712 | $0.00 | 69,166.0000 | 0 | 3.77% | 0.00% |
| June 20, 2024 | Foster Jonathan P. | Chief Financial Officer | F | Common Stock | 636 | $3.78 | 8,087.0000 | 0 | 7.29% | 0.00% |
| June 20, 2024 | Foster Jonathan P. | Chief Financial Officer | M | Common Stock | 2712 | $0.00 | 8,723.0000 | 0 | 45.12% | 0.00% |
| June 20, 2024 | PICKER DONALD H | Chief Science Officer | M | Restricted Stock Units | 1078 | $0.00 | 28,124.0000 | 0 | 3.69% | 0.00% |
| June 20, 2024 | PICKER DONALD H | Chief Science Officer | F | Common Stock | 320 | $3.78 | 6,759.0000 | 0 | 4.52% | 0.00% |
| June 20, 2024 | KLEMP WALTER V | CEO and President | F | Common Stock | 914 | $3.78 | 49,493.0000 | 0 | 1.81% | 0.00% |
| June 20, 2024 | KLEMP WALTER V | CEO and President | M | Restricted Stock Units | 3750 | $0.00 | 123,124.0000 | 0 | 2.96% | 0.00% |
| June 20, 2024 | KLEMP WALTER V | CEO and President | M | Common Stock | 3750 | $0.00 | 50,407.0000 | 0 | 8.04% | 0.00% |
| June 16, 2024 | KLEMP WALTER V | CEO and President | M | Restricted Stock Units | 1667 | $0.00 | 126,874.0000 | 0 | 1.30% | 0.00% |
| June 16, 2024 | KLEMP WALTER V | CEO and President | F | Common Stock | 406 | $4.14 | 46,657.0000 | 0 | 0.86% | 0.00% |
| June 16, 2024 | KLEMP WALTER V | CEO and President | M | Common Stock | 1667 | $0.00 | 47,063.0000 | 0 | 3.67% | 0.00% |
| June 16, 2024 | Foster Jonathan P. | Chief Financial Officer | M | Restricted Stock Units | 834 | $0.00 | 71,878.0000 | 0 | 1.15% | 0.00% |
| June 16, 2024 | Foster Jonathan P. | Chief Financial Officer | F | Common Stock | 196 | $4.14 | 6,011.0000 | 0 | 3.16% | 0.00% |
| June 16, 2024 | Foster Jonathan P. | Chief Financial Officer | M | Common Stock | 834 | $0.00 | 6,207.0000 | 0 | 15.52% | 0.00% |