SEC Insider Transactions from Bala Mohan.

Last updated: 2026-03-14 11:43 UTC | Total transactions: 35

Bala Mohan, SVP and Chief Development Officer at Mersana Therapeutics ($MRSN), made one open market sale of company shares in the last year, totaling $762.30. His most recent transaction occurred on October 27, 2025. Among 11,678 insiders with sales, Bala Mohan's activity ranks 11,559th by value, well below the average of $8.6 million across 6.37 transactions per insider. He reported no open market purchases.

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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 Bala Mohan SVP, Chief Development D Stock Option (right to buy) 7734 $0.00 0.0000 4,998,750 100.00% 0.15%
Jan. 6, 2026 Mersana Therapeutics, Inc. $MRSN Bala Mohan SVP, Chief Development U Common Stock 2927 $0.00 0.0000 4,998,750 100.00% 0.06%
Jan. 6, 2026 Mersana Therapeutics, Inc. $MRSN Bala Mohan SVP, Chief Development D Stock Option (right to buy) 2646 $0.00 0.0000 4,998,750 100.00% 0.05%
Jan. 6, 2026 Mersana Therapeutics, Inc. $MRSN Bala Mohan SVP, Chief Development D Stock Option (right to buy) 1853 $0.00 0.0000 4,998,750 100.00% 0.04%
Jan. 6, 2026 Mersana Therapeutics, Inc. $MRSN Bala Mohan SVP, Chief Development D Stock Option (right to buy) 3515 $0.00 0.0000 4,998,750 100.00% 0.07%
Jan. 6, 2026 Mersana Therapeutics, Inc. $MRSN Bala Mohan SVP, Chief Development D Restricted Stock Units 2500 $0.00 0.0000 4,998,750 100.00% 0.05%
Jan. 6, 2026 Mersana Therapeutics, Inc. $MRSN Bala Mohan SVP, Chief Development D Restricted Stock Units 1750 $0.00 0.0000 4,998,750 100.00% 0.04%
Jan. 6, 2026 Mersana Therapeutics, Inc. $MRSN Bala Mohan SVP, Chief Development D Restricted Stock Units 700 $0.00 0.0000 4,998,750 100.00% 0.01%
Jan. 6, 2026 Mersana Therapeutics, Inc. $MRSN Bala Mohan SVP, Chief Development D Stock Option (right to buy) 9309 $0.00 0.0000 4,998,750 100.00% 0.19%
Jan. 6, 2026 Mersana Therapeutics, Inc. $MRSN Bala Mohan SVP, Chief Development D Stock Option (right to buy) 1190 $0.00 0.0000 4,998,750 100.00% 0.02%
Jan. 6, 2026 Mersana Therapeutics, Inc. $MRSN Bala Mohan SVP, Chief Development D Stock Option (right to buy) 5246 $0.00 0.0000 4,998,750 100.00% 0.10%
Jan. 6, 2026 Mersana Therapeutics, Inc. $MRSN Bala Mohan SVP, Chief Development D Stock Option (right to buy) 1053 $0.00 0.0000 4,998,750 100.00% 0.02%
Oct. 25, 2025 Mersana Therapeutics, Inc. $MRSN Bala Mohan SVP, Chief Development Officer M Restricted Stock Unit 250 $0.00 0.0000 124,631,339 100.00% 0.00%
Oct. 27, 2025 Mersana Therapeutics, Inc. $MRSN Bala Mohan SVP, Chief Development Officer S Common Stock 77 $9.90 2,922.0000 124,631,339 2.57% 0.00%
Oct. 25, 2025 Mersana Therapeutics, Inc. $MRSN Bala Mohan SVP, Chief Development Officer M Common Stock 250 $0.00 2,999.0000 124,631,339 9.09% 0.00%
Jan. 15, 2025 Mersana Therapeutics, Inc. $MRSN Bala Mohan SVP, Chief Development Officer M Common Stock 14583 $0.00 74,811.0000 0 24.21% 0.00%
Jan. 16, 2025 Mersana Therapeutics, Inc. $MRSN Bala Mohan SVP, Chief Development Officer S Common Stock 5939 $0.58 68,872.0000 0 7.94% 0.00%
Jan. 15, 2025 Mersana Therapeutics, Inc. $MRSN Bala Mohan SVP, Chief Development Officer M Restricted Stock Unit 14583 $0.00 43,750.0000 0 25.00% 0.00%
Jan. 15, 2025 Mersana Therapeutics, Inc. $MRSN Bala Mohan SVP, Chief Development Officer A Stock Option (Right to Buy) 281250 $0.00 281,250.0000 0 9999.99% 0.00%
Jan. 15, 2025 Mersana Therapeutics, Inc. $MRSN Bala Mohan SVP, Chief Development Officer A Restricted Stock Unit 62500 $0.00 62,500.0000 0 9999.99% 0.00%
Jan. 14, 2025 Mersana Therapeutics, Inc. $MRSN Bala Mohan SVP, Chief Development Officer S Common Stock 3253 $0.66 60,228.0000 0 5.12% 0.00%
Jan. 13, 2025 Mersana Therapeutics, Inc. $MRSN Bala Mohan SVP, Chief Development Officer M Restricted Stock Unit 8750 $0.00 17,500.0000 0 33.33% 0.00%
Jan. 13, 2025 Mersana Therapeutics, Inc. $MRSN Bala Mohan SVP, Chief Development Officer M Common Stock 8750 $0.00 63,481.0000 0 15.99% 0.00%
Oct. 28, 2024 Mersana Therapeutics, Inc. $MRSN Bala Mohan SVP, Chief Development Officer S Common Stock 1884 $1.90 54,731.0000 0 3.33% 0.00%
Oct. 25, 2024 Mersana Therapeutics, Inc. $MRSN Bala Mohan SVP, Chief Development Officer M Restricted Stock Unit 6250 $0.00 6,250.0000 0 50.00% 0.00%
Oct. 25, 2024 Mersana Therapeutics, Inc. $MRSN Bala Mohan SVP, Chief Development Officer M Common Stock 6250 $0.00 56,615.0000 0 12.41% 0.00%
Oct. 2, 2024 Mersana Therapeutics, Inc. $MRSN Bala Mohan SVP, Chief Development Officer S Common Stock 8089 $2.00 55,963.0000 0 12.63% 0.00%
Oct. 1, 2024 Mersana Therapeutics, Inc. $MRSN Bala Mohan SVP, Chief Development Officer M Restricted Stock Unit 50000 $0.00 0.0000 0 100.00% 0.00%
Oct. 3, 2024 Mersana Therapeutics, Inc. $MRSN Bala Mohan SVP, Chief Development Officer S Common Stock 5598 $1.96 50,365.0000 0 10.00% 0.00%
Oct. 1, 2024 Mersana Therapeutics, Inc. $MRSN Bala Mohan SVP, Chief Development Officer M Common Stock 50000 $0.00 64,052.0000 0 355.82% 0.00%
Jan. 15, 2024 Mersana Therapeutics, Inc. $MRSN Bala Mohan SVP, Chief Development Officer A Restricted Stock Unit 58333 $0.00 58,333.0000 0 9999.99% 0.00%
Jan. 13, 2024 Mersana Therapeutics, Inc. $MRSN Bala Mohan SVP, Chief Development Officer M Common Stock 8750 $0.00 17,483.0000 0 100.19% 0.00%
Jan. 16, 2024 Mersana Therapeutics, Inc. $MRSN Bala Mohan SVP, Chief Development Officer S Common Stock 3431 $2.71 14,052.0000 0 19.62% 0.00%
Jan. 13, 2024 Mersana Therapeutics, Inc. $MRSN Bala Mohan SVP, Chief Development Officer M Restricted Stock Unit 8750 $0.00 26,250.0000 0 25.00% 0.00%
Jan. 15, 2024 Mersana Therapeutics, Inc. $MRSN Bala Mohan SVP, Chief Development Officer A Stock Option (Right to Buy) 262500 $0.00 262,500.0000 0 9999.99% 0.00%