SEC Insider Transactions from Hack Andrew A. F..

Last updated: 2026-03-14 11:43 UTC | Total transactions: 21

Hack Andrew A. F. has filed 21 insider transactions across 2 companies since June 2023.

Most recent transaction: a disposition of 2200 shares of Mersana Therapeutics, Inc. ($MRSN) on January 06, 2026.

Activity breakdown: 0 open-market purchases and 3 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
Jan. 6, 2026 Mersana Therapeutics, Inc. $MRSN Hack Andrew A. F. Not found 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 Hack Andrew A. F. Not found 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 Hack Andrew A. F. Not found 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 Hack Andrew A. F. Not found D Stock Option (right to buy) 368 $0.00 0.0000 4,998,750 100.00% 0.01%
Jan. 6, 2026 Mersana Therapeutics, Inc. $MRSN Hack Andrew A. F. Not found D Stock Option (right to buy) 118 $0.00 0.0000 4,998,750 100.00% 0.00%
Jan. 6, 2026 Mersana Therapeutics, Inc. $MRSN Hack Andrew A. F. Not found 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 Hack Andrew A. F. Not found D Stock Option (right to buy) 439 $0.00 0.0000 4,998,750 100.00% 0.01%
Jan. 6, 2026 Mersana Therapeutics, Inc. $MRSN Hack Andrew A. F. Not found 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 Hack Andrew A. F. Not found 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 Hack Andrew A. F. Not found U Common Stock 578 $0.00 0.0000 4,998,750 100.00% 0.01%
Jan. 6, 2026 Mersana Therapeutics, Inc. $MRSN Hack Andrew A. F. Not found U Common Stock 346545 $0.00 0.0000 4,998,750 100.00% 6.93%
Jan. 6, 2026 Mersana Therapeutics, Inc. $MRSN Hack Andrew A. F. Not found 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 Hack Andrew A. F. Not found D Stock Option (right to buy) 2088 $0.00 0.0000 4,998,750 100.00% 0.04%
June 12, 2025 Mersana Therapeutics, Inc. $MRSN Hack Andrew A. F. Not found A Stock Option (right to buy) 61500 $0.00 61,500.0000 124,631,339 9999.99% 0.05%
Dec. 11, 2024 Nuvalent, Inc. $NUVL Hack Andrew A. F. Not found S Class A Common Stock 1250000 $88.00 1,449,766.0000 65,678,693 46.30% 1.90%
June 12, 2024 Nuvalent, Inc. $NUVL Hack Andrew A. F. Not found A Class A Common Stock 2499 $0.00 2,699,766.0000 58,223,339 0.09% 0.00%
June 12, 2024 Nuvalent, Inc. $NUVL Hack Andrew A. F. Not found A Stock Option (right to buy) 3789 $0.00 3,789.0000 58,223,339 9999.99% 0.01%
June 11, 2024 Mersana Therapeutics, Inc. $MRSN Hack Andrew A. F. Not found A Stock Option (right to buy) 55000 $0.00 55,000.0000 0 9999.99% 0.00%
March 27, 2024 Nuvalent, Inc. $NUVL Hack Andrew A. F. Not found S Class A Common Stock 791795 $72.31 2,697,267.0000 58,223,339 22.69% 1.36%
March 27, 2024 Nuvalent, Inc. $NUVL Hack Andrew A. F. Not found S Class A Common Stock 88205 $76.88 3,489,062.0000 58,223,339 2.47% 0.15%
June 15, 2023 Nuvalent, Inc. $NUVL Hack Andrew A. F. Not found A Stock Option (Right to Buy) 15000 $0.00 15,000.0000 49,668,864 9999.99% 0.03%