Peter W. Sonsini - Net Worth and Insider Trading
Peter W. Sonsini Net Worth
The estimated net worth of Peter W. Sonsini is at least $502 Million dollars as of 2025-05-03. Peter W. Sonsini is the 10% Owner of Mirum Pharmaceuticals Inc and owns about 4,186,243 shares of Mirum Pharmaceuticals Inc (MIRM) stock worth over $183 Million. Peter W. Sonsini is the 10% Owner of Trevi Therapeutics Inc and owns about 11,370,376 shares of Trevi Therapeutics Inc (TRVI) stock worth over $79 Million. Peter W. Sonsini is also the 10% Owner of AVEO Pharmaceuticals Inc and owns about 3,952,958 shares of AVEO Pharmaceuticals Inc (AVEO) stock worth over $59 Million. Besides these, Peter W. Sonsini also holds Akouos Inc (AKUS) , Monte Rosa Therapeutics Inc (GLUE) , Adaptimmune Therapeutics PLC (ADAP) , Ardelyx Inc (ARDX) , NeueHealth Inc (NEUE) , Regulus Therapeutics Inc (RGLS) , Inozyme Pharma Inc (INZY) , Surface Oncology Inc (SURF) , Mersana Therapeutics Inc (MRSN) , Marker Therapeutics Inc (MRKR) , Eargo Inc (EAR) , Interleukin Genetics Inc (ILIU) , Achaogen Inc (AKAOQ) , Metacrine Inc (MTCR) , TRACON Pharmaceuticals Inc (TCON) , ARCA biopharma Inc (ABIO) , Genocea Biosciences Inc (GNCAQ) , Appian Corp (APPN) . Details can be seen in Peter W. Sonsini'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 Peter W. Sonsini has not made any transactions after 2022-05-25 and currently still holds the listed stock(s). Please note that this estimate may not reflect the actual net worth.

Transaction Summary of Peter W. Sonsini
Peter W. Sonsini Insider Ownership Reports
Based on ownership reports from SEC filings, as the reporting owner, Peter W. Sonsini owns 53 companies in total, including Eargo Inc (EAR) , Metacrine Inc (MTCR) , and Mersana Therapeutics Inc (MRSN) among others .
Click here to see the complete history of Peter W. Sonsini’s form 4 insider trades.
Insider Ownership Summary of Peter W. Sonsini
Ticker | Company | Transaction Date | Type of Owner |
---|---|---|---|
EAR | Eargo Inc | 2020-10-20 | 10 percent owner |
MTCR | Metacrine Inc | 2021-12-22 | 10 percent owner |
MRSN | Mersana Therapeutics Inc | 2017-07-03 | 10 percent owner |
![]() | ![]() | 2020-07-28 | 10 percent owner |
![]() | ![]() | 2022-05-25 | 10 percent owner |
![]() | ![]() | 2020-07-23 | 10 percent owner |
![]() | ![]() | 2020-07-09 | 10 percent owner |
![]() | ![]() | 2020-06-30 | 10 percent owner |
![]() | ![]() | 2020-06-19 | 10 percent owner |
![]() | ![]() | 2018-04-23 | 10 percent owner |
![]() | ![]() | 2022-04-11 | 10 percent owner |
![]() | ![]() | 2020-03-11 | 10 percent owner |
![]() | ![]() | 2015-03-11 | 10 percent owner |
![]() | ![]() | 2020-02-06 | 10 percent owner |
![]() | ![]() | 2020-01-29 | 10 percent owner |
![]() | ![]() | 2020-01-24 | 10 percent owner |
![]() | ![]() | 2020-12-04 | 10 percent owner |
![]() | ![]() | 2016-07-18 | 10 percent owner |
![]() | ![]() | 2019-11-06 | 10 percent owner |
![]() | ![]() | 2019-10-30 | 10 percent owner |
![]() | ![]() | 2019-07-22 | 10 percent owner |
![]() | ![]() | 2019-06-07 | 10 percent owner |
![]() | ![]() | 2018-12-07 | 10 percent owner |
![]() | ![]() | 2021-03-16 | 10 percent owner |
![]() | ![]() | 2018-05-01 | 10 percent owner |
![]() | ![]() | 2018-03-27 | 10 percent owner |
![]() | ![]() | 2018-03-09 | 10 percent owner |
![]() | ![]() | 2018-02-26 | 10 percent owner |
![]() | ![]() | 2017-11-27 | 10 percent owner |
![]() | ![]() | 2015-09-30 | 10 percent owner |
![]() | ![]() | 2018-01-01 | 10 percent owner |
![]() | ![]() | 2017-11-20 | 10 percent owner |
![]() | ![]() | 2017-06-29 | director |
![]() | ![]() | 2016-12-19 | 10 percent owner |
![]() | ![]() | 2016-07-29 | 10 percent owner |
![]() | ![]() | 2015-10-14 | 10 percent owner |
![]() | ![]() | 2014-08-06 | 10 percent owner |
![]() | ![]() | 2021-03-15 | 10 percent owner |
![]() | ![]() | 2018-12-07 | 10 percent owner |
![]() | ![]() | 2021-04-08 | 10 percent owner |
![]() | ![]() | 2021-01-01 | 10 percent owner |
![]() | ![]() | 2021-06-28 | 10 percent owner |
![]() | ![]() | 2020-12-09 | 10 percent owner |
![]() | ![]() | 2021-07-29 | director & 10 percent owner |
![]() | ![]() | 2022-02-03 | 10 percent owner |
![]() | ![]() | 2021-07-21 | 10 percent owner |
![]() | ![]() | 2021-09-30 | 10 percent owner |
![]() | ![]() | 2021-06-28 | 10 percent owner |
![]() | ![]() | 2022-06-08 | 10 percent owner |
![]() | ![]() | 2022-08-03 | 10 percent owner |
![]() | ![]() | 2020-03-11 | 10 percent owner |
![]() | ![]() | 2018-01-19 | 10 percent owner |
![]() | ![]() | 2021-07-21 | 10 percent owner |
Peter W. Sonsini Latest Holdings Summary
Peter W. Sonsini currently owns a total of 21 stocks. Among these stocks, Peter W. Sonsini owns 4,186,243 shares of Mirum Pharmaceuticals Inc (MIRM) as of July 22, 2019, with a value of $183 Million and a weighting of 36.43%. Peter W. Sonsini owns 11,370,376 shares of Trevi Therapeutics Inc (TRVI) as of April 11, 2022, with a value of $79 Million and a weighting of 15.83%. Peter W. Sonsini also owns 3,952,958 shares of AVEO Pharmaceuticals Inc (AVEO) as of June 19, 2020, with a value of $59 Million and a weighting of 11.81%. The other 18 stocks Akouos Inc (AKUS) , Monte Rosa Therapeutics Inc (GLUE) , Adaptimmune Therapeutics PLC (ADAP) , Ardelyx Inc (ARDX) , NeueHealth Inc (NEUE) , Regulus Therapeutics Inc (RGLS) , Inozyme Pharma Inc (INZY) , Surface Oncology Inc (SURF) , Mersana Therapeutics Inc (MRSN) , Marker Therapeutics Inc (MRKR) , Eargo Inc (EAR) , Interleukin Genetics Inc (ILIU) , Achaogen Inc (AKAOQ) , Metacrine Inc (MTCR) , TRACON Pharmaceuticals Inc (TCON) , ARCA biopharma Inc (ABIO) , Genocea Biosciences Inc (GNCAQ) , Appian Corp (APPN) have a combined weighting of 35.93% among all his current holdings.
Latest Holdings of Peter W. Sonsini
Ticker | Company | Latest Transaction Date | Shares Owned | Current Price ($) | Current Value ($) |
---|---|---|---|---|---|
MIRM | Mirum Pharmaceuticals Inc | 2019-07-22 | 4,186,243 | 43.69 | 182,896,957 |
TRVI | Trevi Therapeutics Inc | 2022-04-11 | 11,370,376 | 6.99 | 79,478,928 |
AVEO | AVEO Pharmaceuticals Inc | 2020-06-19 | 3,952,958 | 15.00 | 59,294,370 |
AKUS | Akouos Inc | 2020-06-30 | 4,294,207 | 13.29 | 57,070,011 |
GLUE | Monte Rosa Therapeutics Inc | 2021-06-28 | 7,692,298 | 4.97 | 38,230,721 |
ADAP | Adaptimmune Therapeutics PLC | 2020-01-24 | 102,478,668 | 0.29 | 29,298,651 |
ARDX | Ardelyx Inc | 2016-07-18 | 5,331,039 | 4.13 | 22,017,191 |
NEUE | NeueHealth Inc | 2021-06-28 | 2,280,554 | 6.77 | 15,439,351 |
RGLS | Regulus Therapeutics Inc | 2020-12-04 | 645,106 | 7.85 | 5,064,082 |
INZY | Inozyme Pharma Inc | 2020-07-28 | 2,437,689 | 1.62 | 3,949,056 |
SURF | Surface Oncology Inc | 2018-04-23 | 3,312,877 | 1.07 | 3,544,778 |
MRSN | Mersana Therapeutics Inc | 2017-07-03 | 8,140,138 | 0.40 | 3,237,333 |
MRKR | Marker Therapeutics Inc | 2021-03-16 | 1,071,429 | 1.25 | 1,339,286 |
EAR | Eargo Inc | 2020-10-20 | 326,001 | 2.57 | 837,823 |
ILIU | Interleukin Genetics Inc | 2016-07-29 | 55,418,811 | 0.00 | 249,385 |
AKAOQ | Achaogen Inc | 2016-12-19 | 5,215,128 | 0.03 | 130,378 |
MTCR | Metacrine Inc | 2021-12-22 | 2,563,257 | 0.00 | 3,589 |
TCON | TRACON Pharmaceuticals Inc | 2018-03-27 | 17,330 | 0.03 | 558 |
ABIO | ARCA biopharma Inc | 2018-02-26 | 0 | 25.50 | 0 |
GNCAQ | Genocea Biosciences Inc | 2022-05-25 | 0 | 0.00 | 0 |
APPN | Appian Corp | 2017-11-27 | 0 | 31.27 | 0 |
Holding Weightings of Peter W. Sonsini
Peter W. Sonsini Form 4 Trading Tracker
According to the SEC Form 4 filings, Peter W. Sonsini has made a total of 0 transactions in Mirum Pharmaceuticals Inc (MIRM) over the past 5 years. The most-recent trade in Mirum Pharmaceuticals Inc is the acquisition of 450,000 shares on July 22, 2019, which cost Peter W. Sonsini around $7 Million.
According to the SEC Form 4 filings, Peter W. Sonsini has made a total of 1 transactions in Trevi Therapeutics Inc (TRVI) over the past 5 years, including 1 buys and 0 sells. The most-recent trade in Trevi Therapeutics Inc is the acquisition of 3,580,526 shares on April 11, 2022, which cost Peter W. Sonsini around $7 Million.
According to the SEC Form 4 filings, Peter W. Sonsini has made a total of 1 transactions in AVEO Pharmaceuticals Inc (AVEO) over the past 5 years, including 1 buys and 0 sells. The most-recent trade in AVEO Pharmaceuticals Inc is the acquisition of 1,428,571 shares on June 19, 2020, which cost Peter W. Sonsini around $8 Million.
More details on Peter W. Sonsini's insider transactions can be found in the Insider Trading History of Peter W. Sonsini table.Insider Trading History of Peter W. Sonsini
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Peter W. Sonsini Trading Performance
GuruFocus tracks the stock performance after each of Peter W. Sonsini's buying transactions within different timeframes. To be detailed, the average return of stocks after 3 months bought by Peter W. Sonsini is 5.15%. GuruFocus also compares Peter W. Sonsini's trading performance to market benchmark return within the same time period. The performance of stocks bought by Peter W. Sonsini within 3 months outperforms 24 times out of 45 transactions in total compared to the return of S&P 500 within the same period.
You can select different timeframes to see how Peter W. Sonsini's insider trading performs compared to the benchmark.
Performance of Peter W. Sonsini
Peter W. Sonsini Ownership Network
Ownership Network List of Peter W. Sonsini
Ownership Network Relation of Peter W. Sonsini

Peter W. Sonsini Owned Company Details
What does Eargo Inc do?
Who are the key executives at Eargo Inc?
Peter W. Sonsini is the 10 percent owner of Eargo Inc. Other key executives at Eargo Inc include Chief Accounting Officer Mark Thorpe , Chief Operating Officer William Brownie , and Chief Financial Officer Adam Laponis .
Eargo Inc (EAR) Insider Trades Summary
In summary, during the past 3 months, insiders sold 0 shares of Eargo Inc (EAR) in total and bought 0 shares, with a net sale of 0 shares. During the past 18 months, 0 shares of Eargo Inc (EAR) were sold and 0 shares were bought by its insiders, resulting in a net sale of 0 shares.
Eargo Inc (EAR)'s detailed insider trading history can be found in Insider Trading Tracker table.
Eargo Inc Insider Transactions
Peter W. Sonsini Mailing Address
Above is the net worth, insider trading, and ownership report for Peter W. Sonsini. Based on the public information released on the U.S. Securities and Exchange Commission (SEC) website, Peter W. Sonsini's mailing address is: Menlo Park Ca 94025.