Robert W. Hesslein - Net Worth and Insider Trading
Robert W. Hesslein Net Worth
The estimated net worth of Robert W. Hesslein is at least $15 Million dollars as of 2025-05-09. Robert W. Hesslein is the SVP and General Counsel of Foundation Medicine Inc and owns about 105,203 shares of Foundation Medicine Inc (FMI) stock worth over $14 Million. Robert W. Hesslein is also the Senior VP & General Counsel of Voyager Therapeutics Inc and owns about 102,200 shares of Voyager Therapeutics Inc (VYGR) stock worth over $323,974. Details can be seen in Robert W. Hesslein's Latest Holdings Summary section.
Disclaimer: The insider information is derived from SEC filings. The estimated net worth is based on the final shares held after open market or private purchases and sales of common stock with a transaction code of "P" or "S" on Form 4, assuming that Robert W. Hesslein has not made any transactions after 2023-03-20 and currently still holds the listed stock(s). Please note that this estimate may not reflect the actual net worth.

Transaction Summary of Robert W. Hesslein
Robert W. Hesslein Insider Ownership Reports
Based on ownership reports from SEC filings, as the reporting owner, Robert W. Hesslein owns 2 companies in total, including Voyager Therapeutics Inc (VYGR) , and Foundation Medicine Inc (FMI) .
Click here to see the complete history of Robert W. Hesslein’s form 4 insider trades.
Insider Ownership Summary of Robert W. Hesslein
Ticker | Company | Transaction Date | Type of Owner |
---|---|---|---|
VYGR | Voyager Therapeutics Inc | 2023-03-20 | Senior VP & General Counsel |
FMI | Foundation Medicine Inc | 2018-07-31 | SVP and General Counsel |
Robert W. Hesslein Latest Holdings Summary
Robert W. Hesslein currently owns a total of 2 stocks. Among these stocks, Robert W. Hesslein owns 105,203 shares of Foundation Medicine Inc (FMI) as of July 2, 2018, with a value of $14 Million and a weighting of 97.8%. Robert W. Hesslein also owns 102,200 shares of Voyager Therapeutics Inc (VYGR) as of March 20, 2023, with a value of $323,974 and a weighting of 2.2%.
Latest Holdings of Robert W. Hesslein
Ticker | Company | Latest Transaction Date | Shares Owned | Current Price ($) | Current Value ($) |
---|---|---|---|---|---|
FMI | Foundation Medicine Inc | 2018-07-02 | 105,203 | 137.00 | 14,412,811 |
VYGR | Voyager Therapeutics Inc | 2023-03-20 | 102,200 | 3.17 | 323,974 |
Holding Weightings of Robert W. Hesslein
Robert W. Hesslein Form 4 Trading Tracker
According to the SEC Form 4 filings, Robert W. Hesslein has made a total of 0 transactions in Foundation Medicine Inc (FMI) over the past 5 years. The most-recent trade in Foundation Medicine Inc is the sale of 2,520 shares on July 2, 2018, which brought Robert W. Hesslein around $344,383.
According to the SEC Form 4 filings, Robert W. Hesslein has made a total of 10 transactions in Voyager Therapeutics Inc (VYGR) over the past 5 years, including 0 buys and 10 sells. The most-recent trade in Voyager Therapeutics Inc is the sale of 4,410 shares on March 20, 2023, which brought Robert W. Hesslein around $34,222.
Insider Trading History of Robert W. Hesslein
- 1
Robert W. Hesslein Trading Performance
Robert W. Hesslein Ownership Network
Ownership Network List of Robert W. Hesslein
Ownership Network Relation of Robert W. Hesslein

Robert W. Hesslein Owned Company Details
What does Voyager Therapeutics Inc do?
Who are the key executives at Voyager Therapeutics Inc?
Robert W. Hesslein is the Senior VP & General Counsel of Voyager Therapeutics Inc. Other key executives at Voyager Therapeutics Inc include Chief Scientific Officer Todd Alfred Carter , Chief Operating Officer Robin Swartz , and Chief Legal Officer Sandell Jacquelyn Fahey .
Voyager Therapeutics Inc (VYGR) Insider Trades Summary
Over the past 18 months, Robert W. Hesslein made no insider transaction in Voyager Therapeutics Inc (VYGR). Other recent insider transactions involving Voyager Therapeutics Inc (VYGR) include a net sale of 28,297 shares made by Robin Swartz , a net sale of 64,379 shares made by Alfred Sandrock , and a net sale of 15,142 shares made by Todd Alfred Carter .
In summary, during the past 3 months, insiders sold 73,237 shares of Voyager Therapeutics Inc (VYGR) in total and bought 0 shares, with a net sale of 73,237 shares. During the past 18 months, 132,025 shares of Voyager Therapeutics Inc (VYGR) were sold and 0 shares were bought by its insiders, resulting in a net sale of 132,025 shares.
Voyager Therapeutics Inc (VYGR)'s detailed insider trading history can be found in Insider Trading Tracker table.
Voyager Therapeutics Inc Insider Transactions
Robert W. Hesslein Mailing Address
Above is the net worth, insider trading, and ownership report for Robert W. Hesslein. Based on the public information released on the U.S. Securities and Exchange Commission (SEC) website, Robert W. Hesslein's mailing address is: Cambridge Ma 02139.