Bruce Booth - Net Worth and Insider Trading
Bruce Booth Net Worth
The estimated net worth of Bruce Booth is at least $442 Million dollars as of 2026-08-13. Bruce Booth is the Director of Kymera Therapeutics Inc and owns about 2,847,541 shares of Kymera Therapeutics Inc (KYMR) stock worth over $325 Million. Bruce Booth is the Director of Vigil Neuroscience Inc and owns about 5,836,874 shares of Vigil Neuroscience Inc (VIGL) stock worth over $47 Million. Bruce Booth is also the Director of Cogent Biosciences Inc and owns about 840,384 shares of Cogent Biosciences Inc (COGT) stock worth over $33 Million. Besides these, Bruce Booth also holds Sionna Therapeutics Inc (SION) , Avrobio Inc (AVRO) , Viridian Therapeutics Inc (VRDN) , Magenta Therapeutics Inc (MGTA) . Details can be seen in Bruce Booth'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 Bruce Booth has not made any transactions after 2026-06-29 and currently still holds the listed stock(s). Please note that this estimate may not reflect the actual net worth.
Transaction Summary of Bruce Booth
Bruce Booth Insider Ownership Reports
Based on ownership reports from SEC filings, as the reporting owner, Bruce Booth owns 10 companies in total, including Kymera Therapeutics Inc (KYMR) , Cogent Biosciences Inc (COGT) , and Magenta Therapeutics Inc (MGTA) among others .
Click here to see the complete history of Bruce Booth’s form 4 insider trades.
Insider Ownership Summary of Bruce Booth
| Ticker | Company | Transaction Date | Type of Owner |
|---|---|---|---|
| KYMR | Kymera Therapeutics Inc | 2026-06-29 | director |
| COGT | Cogent Biosciences Inc | 2018-04-03 | director |
| MGTA | Magenta Therapeutics Inc | 2020-06-29 | director |
 | | 2019-07-19 | director |
| | 2018-02-13 | director |
| | 2015-07-13 | director & 10 percent owner |
| | 2022-01-11 | director |
| | 2018-06-20 | director |
| | 2018-06-20 | director |
| | 2025-10-21 | director |
Bruce Booth Latest Holdings Summary
Bruce Booth currently owns a total of 7 stocks. Among these stocks, Bruce Booth owns 2,847,541 shares of Kymera Therapeutics Inc (KYMR) as of June 29, 2026, with a value of $325 Million and a weighting of 73.54%. Bruce Booth owns 5,836,874 shares of Vigil Neuroscience Inc (VIGL) as of January 11, 2022, with a value of $47 Million and a weighting of 10.64%. Bruce Booth also owns 840,384 shares of Cogent Biosciences Inc (COGT) as of April 3, 2018, with a value of $33 Million and a weighting of 7.42%. The other 4 stocks Sionna Therapeutics Inc (SION) , Avrobio Inc (AVRO) , Viridian Therapeutics Inc (VRDN) , Magenta Therapeutics Inc (MGTA) have a combined weighting of 8.4% among all his current holdings.
Latest Holdings of Bruce Booth
| Ticker | Company | Latest Transaction Date | Shares Owned | Current Price ($) | Current Value ($) |
|---|---|---|---|---|---|
| KYMR | Kymera Therapeutics Inc | 2026-06-29 | 2,847,541 | 114.10 | 324,904,428 |
| VIGL | Vigil Neuroscience Inc | 2022-01-11 | 5,836,874 | 8.05 | 46,986,836 |
| COGT | Cogent Biosciences Inc | 2018-04-03 | 840,384 | 38.98 | 32,758,168 |
| SION | Sionna Therapeutics Inc | 2025-10-21 | 2,995,602 | 6.25 | 18,722,513 |
| AVRO | Avrobio Inc | 2019-07-19 | 463,941 | 16.80 | 7,794,209 |
| VRDN | Viridian Therapeutics Inc | 2018-02-13 | 299,579 | 22.89 | 6,857,363 |
| MGTA | Magenta Therapeutics Inc | 2020-06-29 | 5,367,125 | 0.70 | 3,754,841 |
Holding Weightings of Bruce Booth
Bruce Booth Form 4 Trading Tracker
According to the SEC Form 4 filings, Bruce Booth has made a total of 18 transactions in Kymera Therapeutics Inc (KYMR) over the past 5 years, including 0 buys and 18 sells. The most-recent trade in Kymera Therapeutics Inc is the sale of 31,283 shares on June 29, 2026, which brought Bruce Booth around $3 Million.
According to the SEC Form 4 filings, Bruce Booth has made a total of 1 transactions in Vigil Neuroscience Inc (VIGL) over the past 5 years, including 1 buys and 0 sells. The most-recent trade in Vigil Neuroscience Inc is the acquisition of 535,000 shares on January 11, 2022, which cost Bruce Booth around $7 Million.
According to the SEC Form 4 filings, Bruce Booth has made a total of 0 transactions in Cogent Biosciences Inc (COGT) over the past 5 years. The most-recent trade in Cogent Biosciences Inc is the acquisition of 23,513 shares on April 3, 2018, which cost Bruce Booth around $1 Million.
More details on Bruce Booth's insider transactions can be found in the Insider Trading History of Bruce Booth table.Insider Trading History of Bruce Booth
* The information on this page (including Insider Trading Shares, Share Changes, Cost, etc.) is sourced exclusively from Form 4 filings and does not incorporate any data from 13F or 13D/G filings. As a result, it may differ from the values shown on the Guru page.
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Bruce Booth Trading Performance
GuruFocus tracks the stock performance after each of Bruce Booth's buying transactions within different timeframes. To be detailed, the average return of stocks after 3 months bought by Bruce Booth is -9.77%. GuruFocus also compares Bruce Booth's trading performance to market benchmark return within the same time period. The performance of stocks bought by Bruce Booth within 3 months outperforms 2 times out of 6 transactions in total compared to the return of S&P 500 within the same period.
You can select different timeframes to see how Bruce Booth's insider trading performs compared to the benchmark.
Performance of Bruce Booth
Average Return
Outperforming Transactions
| 1 Month | 3 Months | 6 Months | 1 Year | 2 Years | 3 Years | |
|---|---|---|---|---|---|---|
| Return(%) | 1.92 | | | | | |
| Relative Return to S&P 500(%) | 2.65 | | | | | |
Bruce Booth Ownership Network
Ownership Network List of Bruce Booth
Ownership Network Relation of Bruce Booth
Bruce Booth Owned Company Details
What does Kymera Therapeutics Inc do?
Who are the key executives at Kymera Therapeutics Inc?
Bruce Booth is the director of Kymera Therapeutics Inc. Other key executives at Kymera Therapeutics Inc include director & President and CEO Nello Mainolfi , Chief Business Officer Noah Goodman , and Chief Financial Officer Bruce N. Jacobs .
Kymera Therapeutics Inc (KYMR) Insider Trades Summary
Over the past 18 months, Bruce Booth made 10 insider transaction in Kymera Therapeutics Inc (KYMR) with a net sale of 2,072,921. Other recent insider transactions involving Kymera Therapeutics Inc (KYMR) include a net sale of 410,000 shares made by Nello Mainolfi , a net sale of 197,926 shares made by Jeremy G Chadwick , and a net sale of 128,245 shares made by Jared Gollob .
In summary, during the past 3 months, insiders sold 3,604,813 shares of Kymera Therapeutics Inc (KYMR) in total and bought 0 shares, with a net sale of 3,604,813 shares. During the past 18 months, 4,731,238 shares of Kymera Therapeutics Inc (KYMR) were sold and 2,978,480 shares were bought by its insiders, resulting in a net sale of 1,752,758 shares.
Kymera Therapeutics Inc (KYMR)'s detailed insider trading history can be found in Insider Trading Tracker table.
Kymera Therapeutics Inc Insider Transactions
Bruce Booth Mailing Address
Above is the net worth, insider trading, and ownership report for Bruce Booth. Based on the public information released on the U.S. Securities and Exchange Commission (SEC) website, Bruce Booth's mailing address is: Waltham Ma 02451.
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