SEC Insider Transactions from Hesslein Robert W..

Last updated: 2026-03-14 11:14 UTC | Total transactions: 8

Hesslein Robert W. has filed 8 insider transactions across 2 companies since January 2023.

Most recent transaction: a grant/award of 757 shares of ALNYLAM PHARMACEUTICALS, INC. ($ALNY) on March 03, 2025.

Activity breakdown: 0 open-market purchases and 5 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
March 3, 2025 ALNYLAM PHARMACEUTICALS, INC. $ALNY Hesslein Robert W. EVP, CLO and Secretary A Common Stock 757 $0.00 8,002.0000 127,651,000 10.45% 0.00%
March 3, 2025 ALNYLAM PHARMACEUTICALS, INC. $ALNY Hesslein Robert W. EVP, CLO and Secretary A Stock Option (right to buy) 1529 $0.00 1,529.0000 127,651,000 9999.99% 0.00%
Oct. 1, 2024 ALNYLAM PHARMACEUTICALS, INC. $ALNY Hesslein Robert W. EVP, CLO and Secretary A Common Stock 7245 $0.00 7,245.0000 128,590,000 9999.99% 0.01%
March 20, 2023 Voyager Therapeutics, Inc. $VYGR Hesslein Robert W. Senior VP & General Counsel S Common Stock 4410 $7.76 102,200.0000 38,356,810 4.14% 0.01%
Feb. 17, 2023 Voyager Therapeutics, Inc. $VYGR Hesslein Robert W. Senior VP & General Counsel S Common Stock 3297 $7.45 106,610.0000 38,356,810 3.00% 0.01%
Feb. 13, 2023 Voyager Therapeutics, Inc. $VYGR Hesslein Robert W. Senior VP & General Counsel S Common Stock 2868 $7.67 109,907.0000 38,356,810 2.54% 0.01%
Jan. 17, 2023 Voyager Therapeutics, Inc. $VYGR Hesslein Robert W. Senior VP & General Counsel S Common Stock 1396 $9.57 113,567.0000 38,356,810 1.21% 0.00%
Jan. 17, 2023 Voyager Therapeutics, Inc. $VYGR Hesslein Robert W. Senior VP & General Counsel S Common Stock 792 $10.34 112,775.0000 38,356,810 0.70% 0.00%