Huber Martin H. Jr., President and CEO, made one open market purchase of Syndax Pharmaceuticals ($SNDX) shares worth $45,000 in the last year, most recently on May 19, 2025. This ranks 3,152nd among 4,983 insiders, well below the average buy of $1.5 million across 3.29 transactions. He also sold Mersana Therapeutics ($MRSN) shares once for $14,700 on September 12, 2025, ranking 11,171st out of 11,678 insiders versus an average sale of $8.6 million over 6.37 transactions.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feb. 4, 2026 | Syndax Pharmaceuticals Inc | $SNDX | Huber Martin H. Jr. | Not found | A | Common Stock | 24000 | $0.00 | 103,000.0000 | 86,914,838 | 30.38% | 0.03% |
| Jan. 6, 2026 | Mersana Therapeutics, Inc. | $MRSN | Huber Martin H. Jr. | President, CEO | D | Stock Option (right to buy) | 5938 | $0.00 | 0.0000 | 4,998,750 | 100.00% | 0.12% |
| Jan. 6, 2026 | Mersana Therapeutics, Inc. | $MRSN | Huber Martin H. Jr. | President, CEO | D | Stock Option (right to buy) | 26713 | $0.00 | 0.0000 | 4,998,750 | 100.00% | 0.53% |
| Jan. 6, 2026 | Mersana Therapeutics, Inc. | $MRSN | Huber Martin H. Jr. | President, CEO | D | Stock Option (right to buy) | 1923 | $0.00 | 0.0000 | 4,998,750 | 100.00% | 0.04% |
| Jan. 6, 2026 | Mersana Therapeutics, Inc. | $MRSN | Huber Martin H. Jr. | President, CEO | D | Stock Option (right to buy) | 99 | $0.00 | 0.0000 | 4,998,750 | 100.00% | 0.00% |
| Jan. 6, 2026 | Mersana Therapeutics, Inc. | $MRSN | Huber Martin H. Jr. | President, CEO | D | Stock Option (right to buy) | 1002 | $0.00 | 0.0000 | 4,998,750 | 100.00% | 0.02% |
| Jan. 6, 2026 | Mersana Therapeutics, Inc. | $MRSN | Huber Martin H. Jr. | President, CEO | D | Stock Option (right to buy) | 407 | $0.00 | 0.0000 | 4,998,750 | 100.00% | 0.01% |
| Jan. 6, 2026 | Mersana Therapeutics, Inc. | $MRSN | Huber Martin H. Jr. | President, CEO | D | Stock Option (right to buy) | 1800 | $0.00 | 0.0000 | 4,998,750 | 100.00% | 0.04% |
| Jan. 6, 2026 | Mersana Therapeutics, Inc. | $MRSN | Huber Martin H. Jr. | President, CEO | D | Stock Option (right to buy) | 135 | $0.00 | 0.0000 | 4,998,750 | 100.00% | 0.00% |
| Jan. 6, 2026 | Mersana Therapeutics, Inc. | $MRSN | Huber Martin H. Jr. | President, CEO | D | Stock Option (right to buy) | 734 | $0.00 | 0.0000 | 4,998,750 | 100.00% | 0.01% |
| Jan. 6, 2026 | Mersana Therapeutics, Inc. | $MRSN | Huber Martin H. Jr. | President, CEO | D | Stock Option (right to buy) | 179 | $0.00 | 0.0000 | 4,998,750 | 100.00% | 0.00% |
| Jan. 6, 2026 | Mersana Therapeutics, Inc. | $MRSN | Huber Martin H. Jr. | President, CEO | D | Stock Option (right to buy) | 12121 | $0.00 | 0.0000 | 4,998,750 | 100.00% | 0.24% |
| Jan. 6, 2026 | Mersana Therapeutics, Inc. | $MRSN | Huber Martin H. Jr. | President, CEO | D | Stock Option (right to buy) | 27878 | $0.00 | 0.0000 | 4,998,750 | 100.00% | 0.56% |
| Jan. 6, 2026 | Mersana Therapeutics, Inc. | $MRSN | Huber Martin H. Jr. | President, CEO | D | Stock Option (right to buy) | 364 | $0.00 | 0.0000 | 4,998,750 | 100.00% | 0.01% |
| Jan. 6, 2026 | Mersana Therapeutics, Inc. | $MRSN | Huber Martin H. Jr. | President, CEO | D | Stock Option (right to buy) | 497 | $0.00 | 0.0000 | 4,998,750 | 100.00% | 0.01% |
| Jan. 6, 2026 | Mersana Therapeutics, Inc. | $MRSN | Huber Martin H. Jr. | President, CEO | D | Stock Option (right to buy) | 7467 | $0.00 | 0.0000 | 4,998,750 | 100.00% | 0.15% |
| Jan. 6, 2026 | Mersana Therapeutics, Inc. | $MRSN | Huber Martin H. Jr. | President, CEO | D | Restricted Stock Units | 13340 | $0.00 | 0.0000 | 4,998,750 | 100.00% | 0.27% |
| Jan. 6, 2026 | Mersana Therapeutics, Inc. | $MRSN | Huber Martin H. Jr. | President, CEO | D | Restricted Stock Units | 1328 | $0.00 | 0.0000 | 4,998,750 | 100.00% | 0.03% |
| Jan. 6, 2026 | Mersana Therapeutics, Inc. | $MRSN | Huber Martin H. Jr. | President, CEO | D | Restricted Stock Units | 7256 | $0.00 | 0.0000 | 4,998,750 | 100.00% | 0.15% |
| Jan. 6, 2026 | Mersana Therapeutics, Inc. | $MRSN | Huber Martin H. Jr. | President, CEO | U | Common Stock | 9573 | $0.00 | 0.0000 | 4,998,750 | 100.00% | 0.19% |
| Sept. 11, 2025 | Mersana Therapeutics, Inc. | $MRSN | Huber Martin H. Jr. | President, CEO | M | Common Stock | 6670 | $0.00 | 11,584.0000 | 124,631,339 | 135.73% | 0.01% |
| Sept. 11, 2025 | Mersana Therapeutics, Inc. | $MRSN | Huber Martin H. Jr. | President, CEO | M | Restricted Stock Unit | 6670 | $0.00 | 13,340.0000 | 124,631,339 | 33.33% | 0.01% |
| Sept. 12, 2025 | Mersana Therapeutics, Inc. | $MRSN | Huber Martin H. Jr. | President, CEO | S | Common Stock | 2012 | $7.31 | 9,572.0000 | 124,631,339 | 17.37% | 0.00% |
| May 19, 2025 | Syndax Pharmaceuticals Inc | $SNDX | Huber Martin H. Jr. | Not found | P | Common Stock | 5000 | $8.99 | 79,000.0000 | 86,024,394 | 6.76% | 0.01% |
| Feb. 5, 2025 | Syndax Pharmaceuticals Inc | $SNDX | Huber Martin H. Jr. | Not found | A | Common Stock | 25000 | $0.00 | 74,000.0000 | 0 | 51.02% | 0.00% |
| Jan. 15, 2025 | Mersana Therapeutics, Inc. | $MRSN | Huber Martin H. Jr. | President, CEO | M | Common Stock | 11062 | $0.00 | 127,389.0000 | 0 | 9.51% | 0.00% |
| Jan. 15, 2025 | Mersana Therapeutics, Inc. | $MRSN | Huber Martin H. Jr. | President, CEO | A | Stock Option (Right to Buy) | 816300 | $0.00 | 816,300.0000 | 0 | 9999.99% | 0.00% |
| Jan. 15, 2025 | Mersana Therapeutics, Inc. | $MRSN | Huber Martin H. Jr. | President, CEO | A | Restricted Stock Unit | 181400 | $0.00 | 181,400.0000 | 0 | 9999.99% | 0.00% |
| Jan. 16, 2025 | Mersana Therapeutics, Inc. | $MRSN | Huber Martin H. Jr. | President, CEO | S | Common Stock | 4514 | $0.58 | 122,875.0000 | 0 | 3.54% | 0.00% |
| Jan. 15, 2025 | Mersana Therapeutics, Inc. | $MRSN | Huber Martin H. Jr. | President, CEO | M | Restricted Stock Unit | 11062 | $0.00 | 33,188.0000 | 0 | 25.00% | 0.00% |
| Sept. 11, 2024 | Mersana Therapeutics, Inc. | $MRSN | Huber Martin H. Jr. | President, CEO | M | Common Stock | 166750 | $0.00 | 166,750.0000 | 0 | 9999.99% | 0.00% |
| Sept. 11, 2024 | Mersana Therapeutics, Inc. | $MRSN | Huber Martin H. Jr. | President, CEO | M | Restricted Stock Unit | 166750 | $0.00 | 500,250.0000 | 0 | 25.00% | 0.00% |
| Sept. 12, 2024 | Mersana Therapeutics, Inc. | $MRSN | Huber Martin H. Jr. | President, CEO | S | Common Stock | 50423 | $1.76 | 116,327.0000 | 0 | 30.24% | 0.00% |
| Feb. 7, 2024 | Syndax Pharmaceuticals Inc | $SNDX | Huber Martin H. Jr. | Not found | A | Common Stock | 17000 | $0.00 | 49,000.0000 | 0 | 53.13% | 0.00% |
| Jan. 15, 2024 | Mersana Therapeutics, Inc. | $MRSN | Huber Martin H. Jr. | President, CEO | A | Restricted Stock Unit | 44250 | $0.00 | 44,250.0000 | 0 | 9999.99% | 0.00% |
| Jan. 15, 2024 | Mersana Therapeutics, Inc. | $MRSN | Huber Martin H. Jr. | President, CEO | A | Stock Option (Right to Buy) | 199125 | $0.00 | 199,125.0000 | 0 | 9999.99% | 0.00% |
| Feb. 2, 2023 | Syndax Pharmaceuticals Inc | $SNDX | Huber Martin H. Jr. | Not found | A | Common Stock | 16000 | $0.00 | 32,000.0000 | 0 | 100.00% | 0.00% |