SEC Insider Transactions from KLEMP WALTER V.

Last updated: 2026-03-14 11:11 UTC | Total transactions: 33

Walter V. Klemp, CEO and President of Moleculin Biotech ($MBRX), bought shares on the open market once in the last year, totaling $250,000, with his most recent purchase on June 23, 2025. This ranks 1,344th among nearly 5,000 insiders by purchase value, below the average of $1.5 million across about 3.3 transactions. He reported no open market sales.

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Transaction Date Company Ticker Insider Name Title Transaction Type Security Shares Price Shares Owned Following Total Shares Outstanding % of Owned % of Outstanding
Nov. 12, 2025 Moleculin Biotech, Inc. $MBRX 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 Moleculin Biotech, Inc. $MBRX 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. 4, 2025 Moleculin Biotech, Inc. $MBRX 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 Moleculin Biotech, Inc. $MBRX 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 Moleculin Biotech, Inc. $MBRX KLEMP WALTER V CEO and President F Common Stock 7001 $0.50 765,356.0000 14,000,494 0.91% 0.05%
Aug. 11, 2025 Autonomix Medical, Inc. $AMIX KLEMP WALTER V Director D Option (Right to buy) 8773 $0.00 1,250.0000 1,766,425 87.53% 0.50%
June 23, 2025 Moleculin Biotech, Inc. $MBRX KLEMP WALTER V CEO and President P Common Stock 675675 $0.37 743,607.0000 14,000,494 994.63% 4.83%
June 22, 2025 Moleculin Biotech, Inc. $MBRX 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 Moleculin Biotech, Inc. $MBRX 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 Moleculin Biotech, Inc. $MBRX 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 Moleculin Biotech, Inc. $MBRX 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 Moleculin Biotech, Inc. $MBRX 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 Moleculin Biotech, Inc. $MBRX KLEMP WALTER V CEO and President M Restricted Stock Units 8990 $0.00 382,456.0000 14,000,494 2.30% 0.06%
June 20, 2025 Moleculin Biotech, Inc. $MBRX KLEMP WALTER V CEO and President F Common Stock 914 $0.27 61,132.0000 14,000,494 1.47% 0.01%
June 16, 2025 Moleculin Biotech, Inc. $MBRX 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 Moleculin Biotech, Inc. $MBRX 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 Moleculin Biotech, Inc. $MBRX KLEMP WALTER V CEO and President M Restricted Stock Units 1667 $0.00 370,075.0000 14,000,494 0.45% 0.01%
Nov. 4, 2024 Moleculin Biotech, Inc. $MBRX 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 Moleculin Biotech, Inc. $MBRX KLEMP WALTER V CEO and President A Restricted Stock Units 115000 $0.00 328,152.0000 0 53.95% 0.00%
Oct. 25, 2024 Moleculin Biotech, Inc. $MBRX KLEMP WALTER V CEO and President A Performance Based Restricted Stock Units 43590 $0.00 371,742.0000 0 13.28% 0.00%
July 2, 2024 Moleculin Biotech, Inc. $MBRX KLEMP WALTER V CEO and President M Restricted Stock Units 982 $0.00 113,152.0000 0 0.86% 0.00%
July 2, 2024 Moleculin Biotech, Inc. $MBRX KLEMP WALTER V CEO and President M Common Stock 982 $0.00 57,275.0000 0 1.74% 0.00%
July 2, 2024 Moleculin Biotech, Inc. $MBRX KLEMP WALTER V CEO and President F Common Stock 240 $3.57 57,035.0000 0 0.42% 0.00%
June 22, 2024 Moleculin Biotech, Inc. $MBRX KLEMP WALTER V CEO and President M Restricted Stock Units 8990 $0.00 114,134.0000 0 7.30% 0.00%
June 22, 2024 Moleculin Biotech, Inc. $MBRX KLEMP WALTER V CEO and President M Common Stock 8990 $0.00 58,483.0000 0 18.16% 0.00%
June 22, 2024 Moleculin Biotech, Inc. $MBRX KLEMP WALTER V CEO and President F Common Stock 2190 $3.74 56,293.0000 0 3.74% 0.00%
June 21, 2024 Autonomix Medical, Inc. $AMIX KLEMP WALTER V Director A Option (Right to buy) 175452 $0.00 200,452.0000 14,626,282 701.81% 1.20%
June 20, 2024 Moleculin Biotech, Inc. $MBRX KLEMP WALTER V CEO and President M Restricted Stock Units 3750 $0.00 123,124.0000 0 2.96% 0.00%
June 20, 2024 Moleculin Biotech, Inc. $MBRX KLEMP WALTER V CEO and President F Common Stock 914 $3.78 49,493.0000 0 1.81% 0.00%
June 20, 2024 Moleculin Biotech, Inc. $MBRX KLEMP WALTER V CEO and President M Common Stock 3750 $0.00 50,407.0000 0 8.04% 0.00%
June 16, 2024 Moleculin Biotech, Inc. $MBRX KLEMP WALTER V CEO and President M Restricted Stock Units 1667 $0.00 126,874.0000 0 1.30% 0.00%
June 16, 2024 Moleculin Biotech, Inc. $MBRX KLEMP WALTER V CEO and President F Common Stock 406 $4.14 46,657.0000 0 0.86% 0.00%
June 16, 2024 Moleculin Biotech, Inc. $MBRX KLEMP WALTER V CEO and President M Common Stock 1667 $0.00 47,063.0000 0 3.67% 0.00%