SEC Insider Transactions from Alleva Lawrence M.

Last updated: 2026-03-14 11:43 UTC | Total transactions: 37

Alleva Lawrence M has filed 37 insider transactions across 4 companies since June 2023.

Most recent transaction: a disposition of 500 shares of Mersana Therapeutics, Inc. ($MRSN) on January 06, 2026.

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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
Jan. 6, 2026 Mersana Therapeutics, Inc. $MRSN Alleva Lawrence M Director D Stock Option (right to buy) 500 $0.00 0.0000 4,998,750 100.00% 0.01%
Jan. 6, 2026 Mersana Therapeutics, Inc. $MRSN Alleva Lawrence M Director D Stock Option (right to buy) 133 $0.00 0.0000 4,998,750 100.00% 0.00%
Jan. 6, 2026 Mersana Therapeutics, Inc. $MRSN Alleva Lawrence M Director 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 Alleva Lawrence M Director D Stock Option (right to buy) 546 $0.00 0.0000 4,998,750 100.00% 0.01%
Jan. 6, 2026 Mersana Therapeutics, Inc. $MRSN Alleva Lawrence M Director 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 Alleva Lawrence M Director D Stock Option (right to buy) 181 $0.00 0.0000 4,998,750 100.00% 0.00%
Jan. 6, 2026 Mersana Therapeutics, Inc. $MRSN Alleva Lawrence M Director 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 Alleva Lawrence M Director 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 Alleva Lawrence M Director D Stock Option (right to buy) 561 $0.00 0.0000 4,998,750 100.00% 0.01%
Jan. 6, 2026 Mersana Therapeutics, Inc. $MRSN Alleva Lawrence M Director D Stock Option (right to buy) 310 $0.00 0.0000 4,998,750 100.00% 0.01%
Jan. 6, 2026 Mersana Therapeutics, Inc. $MRSN Alleva Lawrence M Director D Stock Option (right to buy) 159 $0.00 0.0000 4,998,750 100.00% 0.00%
Jan. 6, 2026 Mersana Therapeutics, Inc. $MRSN Alleva Lawrence M Director D Stock Option (right to buy) 2200 $0.00 0.0000 4,998,750 100.00% 0.04%
Jan. 6, 2026 Mersana Therapeutics, Inc. $MRSN Alleva Lawrence M Director D Stock Option (right to buy) 358 $0.00 0.0000 4,998,750 100.00% 0.01%
Jan. 6, 2026 Mersana Therapeutics, Inc. $MRSN Alleva Lawrence M Director D Stock Option (right to buy) 384 $0.00 0.0000 4,998,750 100.00% 0.01%
Jan. 6, 2026 Mersana Therapeutics, Inc. $MRSN Alleva Lawrence M Director U Common Stock 578 $0.00 0.0000 4,998,750 100.00% 0.01%
Jan. 6, 2026 Mersana Therapeutics, Inc. $MRSN Alleva Lawrence M Director U Common Stock 84 $0.00 0.0000 4,998,750 100.00% 0.00%
Jan. 6, 2026 Mersana Therapeutics, Inc. $MRSN Alleva Lawrence M Director D Stock Option (right to buy) 2460 $0.00 0.0000 4,998,750 100.00% 0.05%
Jan. 6, 2026 Mersana Therapeutics, Inc. $MRSN Alleva Lawrence M Director D Stock Option (right to buy) 800 $0.00 0.0000 4,998,750 100.00% 0.02%
Jan. 6, 2026 Mersana Therapeutics, Inc. $MRSN Alleva Lawrence M Director D Stock Option (right to buy) 142 $0.00 0.0000 4,998,750 100.00% 0.00%
Jan. 6, 2026 Mersana Therapeutics, Inc. $MRSN Alleva Lawrence M Director D Stock Option (right to buy) 400 $0.00 0.0000 4,998,750 100.00% 0.01%
Jan. 6, 2026 Mersana Therapeutics, Inc. $MRSN Alleva Lawrence M Director D Stock Option (right to buy) 544 $0.00 0.0000 4,998,750 100.00% 0.01%
Jan. 6, 2026 Mersana Therapeutics, Inc. $MRSN Alleva Lawrence M Director D Stock Option (right to buy) 1000 $0.00 0.0000 4,998,750 100.00% 0.02%
Jan. 6, 2026 Mersana Therapeutics, Inc. $MRSN Alleva Lawrence M Director D Stock Option (right to buy) 450 $0.00 0.0000 4,998,750 100.00% 0.01%
Jan. 6, 2026 Mersana Therapeutics, Inc. $MRSN Alleva Lawrence M Director D Stock Option (right to buy) 368 $0.00 0.0000 4,998,750 100.00% 0.01%
June 12, 2025 Mersana Therapeutics, Inc. $MRSN Alleva Lawrence M Director A Stock Option (right to buy) 61500 $0.00 61,500.0000 124,631,339 9999.99% 0.05%
June 3, 2025 BRIGHT HORIZONS FAMILY SOLUTIONS INC. $BFAM Alleva Lawrence M Not found A Common Stock 976 $0.00 11,240.0000 58,471,566 9.51% 0.00%
Feb. 24, 2025 Galera Therapeutics, Inc. $GRTX Alleva Lawrence M Not found A Stock Option (Right to Buy) 48000 $0.00 48,000.0000 54,633,215 9999.99% 0.09%
Jan. 2, 2025 Mersana Therapeutics, Inc. $MRSN Alleva Lawrence M Director A Stock Option (right to buy) 12521 $0.00 12,521.0000 0 9999.99% 0.00%
Oct. 1, 2024 Mersana Therapeutics, Inc. $MRSN Alleva Lawrence M Director A Stock Option (right to buy) 9615 $0.00 9,615.0000 0 9999.99% 0.00%
July 1, 2024 Mersana Therapeutics, Inc. $MRSN Alleva Lawrence M Director A Stock Option (right to buy) 8972 $0.00 8,972.0000 0 9999.99% 0.00%
July 1, 2024 Adaptimmune Therapeutics PLC $ADAPY Alleva Lawrence M Director A Option to purchase Ordinary Shares 1213926 $0.00 1,213,926.0000 1,559,183,774 9999.99% 0.08%
June 11, 2024 Mersana Therapeutics, Inc. $MRSN Alleva Lawrence M Director A Stock Option (right to buy) 55000 $0.00 55,000.0000 0 9999.99% 0.00%
June 5, 2024 BRIGHT HORIZONS FAMILY SOLUTIONS INC. $BFAM Alleva Lawrence M Not found A Common Stock 902 $0.00 10,264.0000 57,932,574 9.63% 0.00%
April 1, 2024 Mersana Therapeutics, Inc. $MRSN Alleva Lawrence M Director A Stock Option (right to buy) 3996 $0.00 3,996.0000 0 9999.99% 0.00%
Jan. 2, 2024 Mersana Therapeutics, Inc. $MRSN Alleva Lawrence M Director A Stock Option (right to buy) 7763 $0.00 7,763.0000 0 9999.99% 0.00%
July 1, 2023 Galera Therapeutics, Inc. $GRTX Alleva Lawrence M Not found A Stock Option (Right to Buy) 22762 $0.00 22,762.0000 0 9999.99% 0.00%
June 14, 2023 Galera Therapeutics, Inc. $GRTX Alleva Lawrence M Director A Stock Option (Right to Buy) 48000 $0.00 48,000.0000 0 9999.99% 0.00%