Leonard Braden Michael actively traded Adverum Biotechnologies ($ADVM) shares on the open market over the past year, buying 13 times for $2.2 million with his latest purchase on April 23, 2025. These buys rank 292nd among 4,983 insiders, surpassing the average of $1.5 million across 3.29 transactions. He sold $ADVM four times for $4.6 million, most recently on December 4, 2025 (2051st rank); AN2 Therapeutics ($ANTX) five times for $3.1 million, latest on May 30, 2025 (2661st); and ASTROTECH ($ASTC) twice for $1.6 million, latest on October 3, 2025 (3884th). His sales trail the average of $8.6 million over 6.37 trades among 11,678 insiders.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dec. 4, 2025 | Adverum Biotechnologies, Inc. | $ADVM | Leonard Braden Michael | Not found | S | Common Stock | 524560 | $4.19 | 2,149,880.0000 | 23,487,000 | 19.61% | 2.23% |
| Dec. 1, 2025 | Adverum Biotechnologies, Inc. | $ADVM | Leonard Braden Michael | Not found | S | Common Stock | 300000 | $4.20 | 2,949,326.0000 | 23,487,000 | 9.23% | 1.28% |
| Dec. 2, 2025 | Adverum Biotechnologies, Inc. | $ADVM | Leonard Braden Michael | Not found | S | Common Stock | 51961 | $4.20 | 2,897,365.0000 | 23,487,000 | 1.76% | 0.22% |
| Dec. 3, 2025 | Adverum Biotechnologies, Inc. | $ADVM | Leonard Braden Michael | Not found | S | Common Stock | 222925 | $4.17 | 2,620,440.0000 | 23,487,000 | 7.84% | 0.95% |
| Oct. 3, 2025 | ASTROTECH Corp | $ASTC | Leonard Braden Michael | Not found | S | Common Stock | 9166 | $5.83 | 0.0000 | 1,758,953 | 100.00% | 0.52% |
| Oct. 3, 2025 | ASTROTECH Corp | $ASTC | Leonard Braden Michael | Not found | S | Common Stock | 220410 | $7.13 | 0.0000 | 1,758,953 | 100.00% | 12.53% |
| May 28, 2025 | AN2 Therapeutics, Inc. | $ANTX | Leonard Braden Michael | Not found | S | Common Stock | 200000 | $1.09 | 3,017,432.0000 | 29,828,227 | 6.22% | 0.67% |
| May 30, 2025 | AN2 Therapeutics, Inc. | $ANTX | Leonard Braden Michael | Not found | S | Common Stock | 7000 | $1.03 | 3,217,432.0000 | 29,828,227 | 0.22% | 0.02% |
| May 30, 2025 | AN2 Therapeutics, Inc. | $ANTX | Leonard Braden Michael | Not found | S | Common Stock | 425000 | $1.01 | 3,224,432.0000 | 29,828,227 | 11.65% | 1.42% |
| May 28, 2025 | AN2 Therapeutics, Inc. | $ANTX | Leonard Braden Michael | Not found | S | Common Stock | 100000 | $1.16 | 3,649,432.0000 | 29,828,227 | 2.67% | 0.34% |
| May 28, 2025 | AN2 Therapeutics, Inc. | $ANTX | Leonard Braden Michael | Not found | S | Common Stock | 2000000 | $1.16 | 3,749,432.0000 | 29,828,227 | 34.79% | 6.71% |
| March 26, 2025 | Adverum Biotechnologies, Inc. | $ADVM | Leonard Braden Michael | Not found | P | Common Stock | 20407 | $5.04 | 2,847,968.0000 | 19,782,000 | 0.72% | 0.10% |
| March 27, 2025 | Adverum Biotechnologies, Inc. | $ADVM | Leonard Braden Michael | Not found | P | Common Stock | 16593 | $5.19 | 2,864,561.0000 | 19,782,000 | 0.58% | 0.08% |
| March 26, 2025 | Adverum Biotechnologies, Inc. | $ADVM | Leonard Braden Michael | Not found | P | Common Stock | 20407 | $5.04 | 2,847,968.0000 | 19,782,000 | 0.72% | 0.10% |
| March 27, 2025 | Adverum Biotechnologies, Inc. | $ADVM | Leonard Braden Michael | Not found | P | Common Stock | 16593 | $5.19 | 2,864,561.0000 | 19,782,000 | 0.58% | 0.08% |
| April 23, 2025 | Adverum Biotechnologies, Inc. | $ADVM | Leonard Braden Michael | Not found | P | Common Stock | 50000 | $2.98 | 3,249,326.0000 | 19,782,000 | 1.56% | 0.25% |
| April 22, 2025 | Adverum Biotechnologies, Inc. | $ADVM | Leonard Braden Michael | Not found | P | Common Stock | 300000 | $3.00 | 3,249,326.0000 | 19,782,000 | 10.17% | 1.52% |
| March 31, 2025 | Adverum Biotechnologies, Inc. | $ADVM | Leonard Braden Michael | Not found | P | Common Stock | 19566 | $4.38 | 5,641,643.0000 | 19,782,000 | 0.35% | 0.10% |
| April 2, 2025 | Adverum Biotechnologies, Inc. | $ADVM | Leonard Braden Michael | Not found | P | Common Stock | 15209 | $4.04 | 5,641,643.0000 | 19,782,000 | 0.27% | 0.08% |
| March 26, 2025 | Adverum Biotechnologies, Inc. | $ADVM | Leonard Braden Michael | Not found | P | Common Stock | 20407 | $5.04 | 2,847,968.0000 | 19,782,000 | 0.72% | 0.10% |
| March 27, 2025 | Adverum Biotechnologies, Inc. | $ADVM | Leonard Braden Michael | Not found | P | Common Stock | 16593 | $5.19 | 2,864,561.0000 | 19,782,000 | 0.58% | 0.08% |
| March 18, 2025 | Adverum Biotechnologies, Inc. | $ADVM | Leonard Braden Michael | Not found | P | Common Stock | 18000 | $4.60 | 2,727,620.0000 | 19,782,000 | 0.66% | 0.09% |
| March 18, 2025 | Adverum Biotechnologies, Inc. | $ADVM | Leonard Braden Michael | Not found | P | Common Stock | 44341 | $4.73 | 2,771,961.0000 | 19,782,000 | 1.63% | 0.22% |
| March 20, 2025 | Adverum Biotechnologies, Inc. | $ADVM | Leonard Braden Michael | Not found | P | Common Stovk | 30600 | $5.61 | 2,722,761.0000 | 19,782,000 | 1.14% | 0.15% |
| March 19, 2025 | Adverum Biotechnologies, Inc. | $ADVM | Leonard Braden Michael | Not found | P | Common Stock | 25000 | $4.94 | 2,796,961.0000 | 19,782,000 | 0.90% | 0.13% |
| Feb. 26, 2025 | Adverum Biotechnologies, Inc. | $ADVM | Leonard Braden Michael | Not found | P | Common Stock | 164886 | $4.01 | 2,537,750.0000 | 19,782,000 | 6.95% | 0.83% |
| Feb. 28, 2025 | Adverum Biotechnologies, Inc. | $ADVM | Leonard Braden Michael | Not found | P | Common Stock | 85068 | $4.60 | 2,709,620.0000 | 19,782,000 | 3.24% | 0.43% |
| Feb. 27, 2025 | Adverum Biotechnologies, Inc. | $ADVM | Leonard Braden Michael | Not found | P | Common Stock | 86802 | $4.46 | 2,624,552.0000 | 19,782,000 | 3.42% | 0.44% |
| Oct. 7, 2024 | OnKure Therapeutics, Inc. | $OKUR | Leonard Braden Michael | Not found | J | Common Stock | 345739 | $0.00 | 447,815.0000 | 316,142 | 338.71% | 100.00% |
| Oct. 7, 2024 | OnKure Therapeutics, Inc. | $OKUR | Leonard Braden Michael | Not found | J | Common Stock | 102076 | $0.00 | 447,815.0000 | 316,142 | 29.52% | 32.29% |
| Sept. 24, 2024 | OnKure Therapeutics, Inc. | $OKUR | Leonard Braden Michael | Not found | P | Common Stock | 29600 | $1.41 | 4,409,418.0000 | 283,817 | 0.68% | 10.43% |
| Sept. 25, 2024 | OnKure Therapeutics, Inc. | $OKUR | Leonard Braden Michael | Not found | P | Common Stock | 68746 | $1.50 | 4,478,164.0000 | 283,817 | 1.56% | 24.22% |
| Sept. 17, 2024 | OnKure Therapeutics, Inc. | $OKUR | Leonard Braden Michael | Not found | P | Common Stock | 55300 | $1.36 | 4,379,012.0000 | 283,817 | 1.28% | 19.48% |
| Sept. 18, 2024 | OnKure Therapeutics, Inc. | $OKUR | Leonard Braden Michael | Not found | P | Common Stock | 806 | $1.40 | 4,379,818.0000 | 283,817 | 0.02% | 0.28% |
| Sept. 16, 2024 | OnKure Therapeutics, Inc. | $OKUR | Leonard Braden Michael | Not found | P | Common Stock | 172747 | $1.37 | 4,323,712.0000 | 283,817 | 4.16% | 60.87% |
| Sept. 12, 2024 | OnKure Therapeutics, Inc. | $OKUR | Leonard Braden Michael | Not found | P | Common Stock | 36176 | $1.40 | 4,000,965.0000 | 283,817 | 0.91% | 12.75% |
| Sept. 13, 2024 | OnKure Therapeutics, Inc. | $OKUR | Leonard Braden Michael | Not found | P | Common Stock | 150000 | $1.31 | 4,150,965.0000 | 283,817 | 3.75% | 52.85% |
| Sept. 6, 2024 | Talis Biomedical Corp | $TLIS | Leonard Braden Michael | Not found | P | Common Stock | 25000 | $1.48 | 248,702.0000 | 31,686,494 | 11.18% | 0.08% |
| Sept. 5, 2024 | Talis Biomedical Corp | $TLIS | Leonard Braden Michael | Not found | P | Common Stock | 5100 | $1.40 | 223,702.0000 | 31,686,494 | 2.33% | 0.02% |
| Sept. 3, 2024 | Talis Biomedical Corp | $TLIS | Leonard Braden Michael | Not found | P | Common Stock | 500 | $4.00 | 218,602.0000 | 31,686,494 | 0.23% | 0.00% |
| Aug. 30, 2024 | Talis Biomedical Corp | $TLIS | Leonard Braden Michael | Not found | P | Common Stock | 151 | $4.25 | 218,602.0000 | 31,686,494 | 0.07% | 0.00% |
| Aug. 26, 2024 | Talis Biomedical Corp | $TLIS | Leonard Braden Michael | Not found | P | Common Stock | 13167 | $3.90 | 216,736.0000 | 31,686,494 | 6.47% | 0.04% |
| Aug. 28, 2024 | Talis Biomedical Corp | $TLIS | Leonard Braden Michael | Not found | P | Common Stock | 1215 | $3.96 | 217,951.0000 | 31,686,494 | 0.56% | 0.00% |
| Aug. 13, 2024 | OnKure Therapeutics, Inc. | $OKUR | Leonard Braden Michael | Not found | P | Common Stock | 171339 | $1.39 | 3,864,302.0000 | 283,817 | 4.64% | 60.37% |
| Aug. 14, 2024 | AN2 Therapeutics, Inc. | $ANTX | Leonard Braden Michael | Not found | P | Common Stock | 1500000 | $1.04 | 5,749,432.0000 | 23,600,107 | 35.30% | 6.36% |
| Aug. 14, 2024 | OnKure Therapeutics, Inc. | $OKUR | Leonard Braden Michael | Not found | P | Common Stock | 100487 | $1.41 | 3,964,789.0000 | 283,817 | 2.60% | 35.41% |
| Aug. 2, 2024 | Aclaris Therapeutics, Inc. | $ACRS | Leonard Braden Michael | Not found | P | Common Stock | 167544 | $1.29 | 28,293,975.0000 | 71,291,400 | 0.60% | 0.24% |
| Aug. 5, 2024 | Aclaris Therapeutics, Inc. | $ACRS | Leonard Braden Michael | Not found | P | Common Stock | 206025 | $1.24 | 28,293,975.0000 | 71,291,400 | 0.73% | 0.29% |
| July 30, 2024 | Adverum Biotechnologies, Inc. | $ADVM | Leonard Braden Michael | Not found | P | Common Stock | 85800 | $7.15 | 2,372,864.0000 | 20,852,000 | 3.75% | 0.41% |
| July 30, 2024 | Aclaris Therapeutics, Inc. | $ACRS | Leonard Braden Michael | Not found | P | Common Stock | 173730 | $1.30 | 27,652,842.0000 | 71,291,400 | 0.63% | 0.24% |
| July 31, 2024 | Aclaris Therapeutics, Inc. | $ACRS | Leonard Braden Michael | Not found | P | Common Stock | 100000 | $1.33 | 27,652,842.0000 | 71,291,400 | 0.36% | 0.14% |
| July 22, 2024 | Aclaris Therapeutics, Inc. | $ACRS | Leonard Braden Michael | Not found | P | Common Stock | 17716 | $1.33 | 27,180,977.0000 | 71,291,400 | 0.07% | 0.02% |
| July 19, 2024 | Aclaris Therapeutics, Inc. | $ACRS | Leonard Braden Michael | Not found | P | Common Stock | 6689 | $1.30 | 27,163,261.0000 | 71,291,400 | 0.02% | 0.01% |
| July 18, 2024 | Aclaris Therapeutics, Inc. | $ACRS | Leonard Braden Michael | Not found | P | Common Stock | 130317 | $1.30 | 27,180,977.0000 | 71,291,400 | 0.48% | 0.18% |
| July 17, 2024 | Adverum Biotechnologies, Inc. | $ADVM | Leonard Braden Michael | Not found | P | Common Stock | 135546 | $7.75 | 2,206,346.0000 | 20,852,000 | 6.55% | 0.65% |
| July 18, 2024 | Adverum Biotechnologies, Inc. | $ADVM | Leonard Braden Michael | Not found | P | Common Stock | 80718 | $9.11 | 2,287,064.0000 | 20,852,000 | 3.66% | 0.39% |
| July 2, 2024 | Aclaris Therapeutics, Inc. | $ACRS | Leonard Braden Michael | Not found | P | Common Stock | 86092 | $1.14 | 26,629,633.0000 | 71,291,400 | 0.32% | 0.12% |
| July 5, 2024 | Aclaris Therapeutics, Inc. | $ACRS | Leonard Braden Michael | Not found | P | Common Stock | 123017 | $1.15 | 26,629,633.0000 | 71,291,400 | 0.46% | 0.17% |
| July 3, 2024 | Aclaris Therapeutics, Inc. | $ACRS | Leonard Braden Michael | Not found | P | Common Stock | 143288 | $1.16 | 26,506,616.0000 | 71,291,400 | 0.54% | 0.20% |
| June 28, 2024 | Aclaris Therapeutics, Inc. | $ACRS | Leonard Braden Michael | Not found | P | Common Stock | 801000 | $1.12 | 24,375,268.0000 | 71,074,858 | 3.40% | 1.13% |
| June 27, 2024 | Aclaris Therapeutics, Inc. | $ACRS | Leonard Braden Michael | Not found | P | Common Stock | 235000 | $1.15 | 24,882,706.0000 | 71,074,858 | 0.95% | 0.33% |
| July 1, 2024 | Aclaris Therapeutics, Inc. | $ACRS | Leonard Braden Michael | Not found | P | Common Stock | 107434 | $1.14 | 24,882,706.0000 | 71,291,400 | 0.43% | 0.15% |
| June 28, 2024 | Aclaris Therapeutics, Inc. | $ACRS | Leonard Braden Michael | Not found | P | Common Stock | 400000 | $1.13 | 24,775,268.0000 | 71,074,858 | 1.64% | 0.56% |
| June 20, 2024 | Tectonic Therapeutic, Inc. | $TECX | Leonard Braden Michael | Not found | J | Common Stock | 33333 | $0.00 | 433,688.0000 | 0 | 8.33% | 0.00% |
| June 20, 2024 | Tectonic Therapeutic, Inc. | $TECX | Leonard Braden Michael | Not found | J | Common Stock | 400355 | $0.00 | 433,688.0000 | 0 | 1201.08% | 0.00% |
| June 18, 2024 | Aclaris Therapeutics, Inc. | $ACRS | Leonard Braden Michael | Not found | P | Common Stock | 50000 | $1.13 | 22,904,268.0000 | 71,074,858 | 0.22% | 0.07% |
| June 17, 2024 | Aclaris Therapeutics, Inc. | $ACRS | Leonard Braden Michael | Not found | P | Common Stock | 150000 | $1.13 | 22,854,268.0000 | 71,074,858 | 0.66% | 0.21% |
| June 14, 2024 | Aclaris Therapeutics, Inc. | $ACRS | Leonard Braden Michael | Not found | P | Common Stock | 345000 | $1.17 | 22,904,268.0000 | 71,074,858 | 1.53% | 0.49% |
| June 13, 2024 | Aclaris Therapeutics, Inc. | $ACRS | Leonard Braden Michael | Not found | P | Common Stock | 28621 | $1.14 | 10,507,134.0000 | 71,074,858 | 0.27% | 0.04% |
| June 12, 2024 | Aclaris Therapeutics, Inc. | $ACRS | Leonard Braden Michael | Not found | P | Common Stock | 82579 | $1.14 | 10,478,513.0000 | 71,074,858 | 0.79% | 0.12% |
| June 11, 2024 | Aclaris Therapeutics, Inc. | $ACRS | Leonard Braden Michael | Not found | P | Common Stock | 1000000 | $1.08 | 10,395,934.0000 | 71,074,858 | 10.64% | 1.41% |
| June 13, 2024 | Aclaris Therapeutics, Inc. | $ACRS | Leonard Braden Michael | Not found | P | Common Stock | 500000 | $1.15 | 11,007,134.0000 | 71,074,858 | 4.76% | 0.70% |
| May 14, 2024 | OnKure Therapeutics, Inc. | $OKUR | Leonard Braden Michael | Not found | P | Common Stock | 335000 | $1.54 | 3,692,963.0000 | 283,817 | 9.98% | 100.00% |
| May 14, 2024 | OnKure Therapeutics, Inc. | $OKUR | Leonard Braden Michael | Not found | P | Common Stock | 79281 | $1.56 | 3,357,963.0000 | 283,817 | 2.42% | 27.93% |
| May 14, 2024 | Tectonic Therapeutic, Inc. | $TECX | Leonard Braden Michael | Not found | P | Common Stock | 296882 | $1.30 | 5,168,262.0000 | 0 | 6.09% | 0.00% |
| May 13, 2024 | Tectonic Therapeutic, Inc. | $TECX | Leonard Braden Michael | Not found | P | Common Stock | 216053 | $1.26 | 4,871,380.0000 | 0 | 4.64% | 0.00% |
| May 13, 2024 | Tectonic Therapeutic, Inc. | $TECX | Leonard Braden Michael | Not found | P | Common Stock | 253700 | $1.24 | 4,655,327.0000 | 0 | 5.76% | 0.00% |
| Jan. 3, 2023 | Enliven Therapeutics, Inc. | $ELVN | Leonard Braden Michael | TenPercentOwner | S | Common Stock | 1250000 | $4.00 | 1,997,774.0000 | 0 | 38.49% | 0.00% |
| Jan. 4, 2023 | Enliven Therapeutics, Inc. | $ELVN | Leonard Braden Michael | TenPercentOwner | S | Common Stock | 1250000 | $4.00 | 1,997,774.0000 | 0 | 38.49% | 0.00% |