Lowinger Timothy B has filed 50 insider transactions across 1 company since January 2024.
Most recent transaction: a disposition of 419 shares of Mersana Therapeutics, Inc. ($MRSN) on January 06, 2026.
Activity breakdown: 0 open-market purchases and 6 sales.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan. 6, 2026 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | D | Stock Option (right to buy) | 419 | $0.00 | 0.0000 | 4,998,750 | 100.00% | 0.01% |
| Jan. 6, 2026 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | D | Stock Option (right to buy) | 713 | $0.00 | 0.0000 | 4,998,750 | 100.00% | 0.01% |
| Jan. 6, 2026 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | D | Stock Option (right to buy) | 1578 | $0.00 | 0.0000 | 4,998,750 | 100.00% | 0.03% |
| Jan. 6, 2026 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | D | Stock Option (right to buy) | 696 | $0.00 | 0.0000 | 4,998,750 | 100.00% | 0.01% |
| Jan. 6, 2026 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | D | Stock Option (right to buy) | 6702 | $0.00 | 0.0000 | 4,998,750 | 100.00% | 0.13% |
| Jan. 6, 2026 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | D | Stock Option (right to buy) | 3047 | $0.00 | 0.0000 | 4,998,750 | 100.00% | 0.06% |
| Jan. 6, 2026 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | U | Common Stock | 10466 | $0.00 | 0.0000 | 4,998,750 | 100.00% | 0.21% |
| Jan. 6, 2026 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | D | Restricted Stock Units | 2166 | $0.00 | 0.0000 | 4,998,750 | 100.00% | 0.04% |
| Jan. 6, 2026 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | D | Restricted Stock Units | 1500 | $0.00 | 0.0000 | 4,998,750 | 100.00% | 0.03% |
| Jan. 6, 2026 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | D | Restricted Stock Units | 750 | $0.00 | 0.0000 | 4,998,750 | 100.00% | 0.02% |
| Jan. 6, 2026 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | D | Restricted Stock Units | 192 | $0.00 | 0.0000 | 4,998,750 | 100.00% | 0.00% |
| Jan. 6, 2026 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | D | Stock Option (right to buy) | 1834 | $0.00 | 0.0000 | 4,998,750 | 100.00% | 0.04% |
| Jan. 6, 2026 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | D | Stock Option (right to buy) | 7959 | $0.00 | 0.0000 | 4,998,750 | 100.00% | 0.16% |
| Jan. 6, 2026 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | D | Stock Option (right to buy) | 1040 | $0.00 | 0.0000 | 4,998,750 | 100.00% | 0.02% |
| Jan. 6, 2026 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | D | Stock Option (right to buy) | 5891 | $0.00 | 0.0000 | 4,998,750 | 100.00% | 0.12% |
| Jan. 6, 2026 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | D | Stock Option (right to buy) | 858 | $0.00 | 0.0000 | 4,998,750 | 100.00% | 0.02% |
| Jan. 6, 2026 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | D | Stock Option (right to buy) | 3234 | $0.00 | 0.0000 | 4,998,750 | 100.00% | 0.06% |
| Jan. 6, 2026 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | D | Stock Option (right to buy) | 215 | $0.00 | 0.0000 | 4,998,750 | 100.00% | 0.00% |
| Jan. 6, 2026 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | D | Stock Option (right to buy) | 4974 | $0.00 | 0.0000 | 4,998,750 | 100.00% | 0.10% |
| Jan. 6, 2026 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | D | Stock Option (right to buy) | 275 | $0.00 | 0.0000 | 4,998,750 | 100.00% | 0.01% |
| Jan. 6, 2026 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | D | Stock Option (right to buy) | 3090 | $0.00 | 0.0000 | 4,998,750 | 100.00% | 0.06% |
| Jan. 6, 2026 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | D | Stock Option (right to buy) | 920 | $0.00 | 0.0000 | 4,998,750 | 100.00% | 0.02% |
| Jan. 15, 2025 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | M | Common Stock | 7291 | $0.00 | 253,221.0000 | 0 | 2.96% | 0.00% |
| Jan. 15, 2025 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | M | Common Stock | 12500 | $0.00 | 265,721.0000 | 0 | 4.94% | 0.00% |
| Jan. 16, 2025 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | S | Common Stock | 8048 | $0.58 | 257,673.0000 | 0 | 3.03% | 0.00% |
| Jan. 15, 2025 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | M | Restricted Stock Unit | 7291 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| Jan. 15, 2025 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | M | Restricted Stock Unit | 12500 | $0.00 | 37,500.0000 | 0 | 25.00% | 0.00% |
| Jan. 15, 2025 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | A | Stock Option (Right to Buy) | 243750 | $0.00 | 243,750.0000 | 0 | 9999.99% | 0.00% |
| Jan. 15, 2025 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | A | Restricted Stock Unit | 54167 | $0.00 | 54,167.0000 | 0 | 9999.99% | 0.00% |
| Jan. 14, 2025 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | M | Restricted Stock Unit | 4792 | $0.00 | 4,791.0000 | 0 | 50.01% | 0.00% |
| Jan. 14, 2025 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | M | Common Stock | 4792 | $0.00 | 247,724.0000 | 0 | 1.97% | 0.00% |
| Jan. 15, 2025 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | S | Common Stock | 1794 | $0.63 | 245,930.0000 | 0 | 0.72% | 0.00% |
| Jan. 14, 2025 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | S | Common Stock | 3483 | $0.66 | 242,932.0000 | 0 | 1.41% | 0.00% |
| Jan. 13, 2025 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | M | Restricted Stock Unit | 9375 | $0.00 | 18,750.0000 | 0 | 33.33% | 0.00% |
| Jan. 13, 2025 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | M | Common Stock | 9375 | $0.00 | 246,415.0000 | 0 | 3.96% | 0.00% |
| Oct. 3, 2024 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | S | Common Stock | 5598 | $1.96 | 235,642.0000 | 0 | 2.32% | 0.00% |
| Oct. 1, 2024 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | M | Common Stock | 50000 | $0.00 | 249,329.0000 | 0 | 25.08% | 0.00% |
| Oct. 2, 2024 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | S | Common Stock | 8089 | $2.00 | 241,240.0000 | 0 | 3.24% | 0.00% |
| Oct. 1, 2024 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | M | Restricted Stock Unit | 50000 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| Jan. 15, 2024 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | A | Restricted Stock Unit | 50000 | $0.00 | 50,000.0000 | 0 | 9999.99% | 0.00% |
| Jan. 13, 2024 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | M | Common Stock | 9375 | $0.00 | 189,738.0000 | 0 | 5.20% | 0.00% |
| Jan. 15, 2024 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | A | Stock Option (Right to Buy) | 225000 | $0.00 | 225,000.0000 | 0 | 9999.99% | 0.00% |
| Jan. 15, 2024 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | M | Restricted Stock Unit | 7916 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| Jan. 15, 2024 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | M | Restricted Stock Unit | 7292 | $0.00 | 7,291.0000 | 0 | 50.00% | 0.00% |
| Jan. 14, 2024 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | M | Restricted Stock Unit | 4792 | $0.00 | 9,583.0000 | 0 | 33.34% | 0.00% |
| Jan. 13, 2024 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | M | Restricted Stock Unit | 9375 | $0.00 | 28,125.0000 | 0 | 25.00% | 0.00% |
| Jan. 16, 2024 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | S | Common Stock | 10409 | $2.71 | 199,329.0000 | 0 | 4.96% | 0.00% |
| Jan. 15, 2024 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | M | Common Stock | 7916 | $0.00 | 209,738.0000 | 0 | 3.92% | 0.00% |
| Jan. 15, 2024 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | M | Common Stock | 7292 | $0.00 | 201,822.0000 | 0 | 3.75% | 0.00% |
| Jan. 14, 2024 | Mersana Therapeutics, Inc. | $MRSN | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | M | Common Stock | 4792 | $0.00 | 194,530.0000 | 0 | 2.53% | 0.00% |