Stephen A Sherwin - Net Worth and Insider Trading

Stephen A Sherwin Net Worth

The estimated net worth of Stephen A Sherwin is at least $3 Million dollars as of 2025-07-12. Stephen A Sherwin is the Director of Biogen Inc and owns about 11,318 shares of Biogen Inc (BIIB) stock worth over $2 Million. Stephen A Sherwin is the Director of Neurocrine Biosciences Inc and owns about 10,673 shares of Neurocrine Biosciences Inc (NBIX) stock worth over $1 Million. Stephen A Sherwin is also the Director of Fresh Tracks Therapeutics Inc and owns about 2 shares of Fresh Tracks Therapeutics Inc (FRTX) stock worth over $2. Details can be seen in Stephen A Sherwin'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 Stephen A Sherwin has not made any transactions after 2025-03-07 and currently still holds the listed stock(s). Please note that this estimate may not reflect the actual net worth.

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Transaction Summary of Stephen A Sherwin

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Stephen A Sherwin Insider Ownership Reports

Based on ownership reports from SEC filings, as the reporting owner, Stephen A Sherwin owns 12 companies in total, including Biogen Inc (BIIB) , Neurocrine Biosciences Inc (NBIX) , and Neon Therapeutics Inc (NTGN) among others .

Click here to see the complete history of Stephen A Sherwin’s form 4 insider trades.

Insider Ownership Summary of Stephen A Sherwin

Ticker Company Transaction Date Type of Owner
BIIB Biogen Inc 2025-03-07 director
NBIX Neurocrine Biosciences Inc 2025-02-13 director
NTGN Neon Therapeutics Inc 2020-05-06 director
LIMIT LIMIT 2020-05-05 director
LIMIT LIMIT 2003-07-28 director
LIMIT LIMIT 2013-03-05 director
LIMIT LIMIT 2013-05-23 director
LIMIT LIMIT 2009-10-14 director
LIMIT LIMIT 2018-06-06 director
LIMIT LIMIT 2021-12-02 director
LIMIT LIMIT 2022-09-16 director
LIMIT LIMIT 2022-09-16 director

Stephen A Sherwin Latest Holdings Summary

Stephen A Sherwin currently owns a total of 3 stocks. Among these stocks, Stephen A Sherwin owns 11,318 shares of Biogen Inc (BIIB) as of March 7, 2025, with a value of $2 Million and a weighting of 51.61%. Stephen A Sherwin owns 10,673 shares of Neurocrine Biosciences Inc (NBIX) as of February 13, 2025, with a value of $1 Million and a weighting of 48.39%. Stephen A Sherwin also owns 2 shares of Fresh Tracks Therapeutics Inc (FRTX) as of May 23, 2013, with a value of $2 and a weighting of 0%.

Latest Holdings of Stephen A Sherwin

Ticker Company Latest Transaction Date Shares Owned Current Price ($) Current Value ($)
BIIB Biogen Inc 2025-03-07 11,318 134.21 1,518,989
NBIX Neurocrine Biosciences Inc 2025-02-13 10,673 133.46 1,424,419
FRTX Fresh Tracks Therapeutics Inc 2013-05-23 2 0.94 2

Holding Weightings of Stephen A Sherwin


Stephen A Sherwin Form 4 Trading Tracker

According to the SEC Form 4 filings, Stephen A Sherwin has made a total of 1 transactions in Biogen Inc (BIIB) over the past 5 years, including 0 buys and 1 sells. The most-recent trade in Biogen Inc is the sale of 8,760 shares on March 7, 2025, which brought Stephen A Sherwin around $1 Million.

According to the SEC Form 4 filings, Stephen A Sherwin has made a total of 4 transactions in Neurocrine Biosciences Inc (NBIX) over the past 5 years, including 0 buys and 4 sells. The most-recent trade in Neurocrine Biosciences Inc is the sale of 13,831 shares on February 13, 2025, which brought Stephen A Sherwin around $2 Million.

According to the SEC Form 4 filings, Stephen A Sherwin has made a total of 0 transactions in Fresh Tracks Therapeutics Inc (FRTX) over the past 5 years. The most-recent trade in Fresh Tracks Therapeutics Inc is the acquisition of 2 shares on May 23, 2013, which cost Stephen A Sherwin around $70.

Insider Trading History of Stephen A Sherwin

No transactions are available. GuruFocus only tracks and displays the purchase and sale of non-derivative security in open market or private transactions from SEC filings with the transaction code of P or S.
Total 0
  • 1
Only the transactions in Open Market or Private Sale at the market prices are included. Other transactions such as conversion of derivative security or exercise of options are not included. Insiders are limited to only officers and/or directors of the company.

Stephen A Sherwin Trading Performance

GuruFocus tracks the stock performance after each of Stephen A Sherwin's buying transactions within different timeframes. To be detailed, the average return of stocks after 3 months bought by Stephen A Sherwin is -62.29%. GuruFocus also compares Stephen A Sherwin's trading performance to market benchmark return within the same time period. The performance of stocks bought by Stephen A Sherwin within 3 months outperforms 0 times out of 1 transactions in total compared to the return of S&P 500 within the same period.

You can select different timeframes to see how Stephen A Sherwin's insider trading performs compared to the benchmark.

Please note GuruFocus will not track the insiders’ transaction performance if he/she does not have buying transactions.

Performance of Stephen A Sherwin

Average Return

LIMIT
Average return per transaction

Outperforming Transactions

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0 out of 1 outperforming transactions.
Each transaction is measured over a period and compared to .
1 Month 3 Months 6 Months 1 Year 2 Years 3 Years
Return(%) -16.76 LIMIT LIMIT LIMIT LIMIT LIMIT
Relative Return to S&P 500(%) -13.24 LIMIT LIMIT LIMIT LIMIT LIMIT

Stephen A Sherwin Ownership Network

Ownership Network List of Stephen A Sherwin

No Data

Ownership Network Relation of Stephen A Sherwin

Insider Network Chart


Stephen A Sherwin Owned Company Details

What does Biogen Inc do?

Who are the key executives at Biogen Inc?

Stephen A Sherwin is the director of Biogen Inc. Other key executives at Biogen Inc include Head of Development Priya Singhal , Head of Research Jane Grogan , and EVP & Human Resources Ginger Gregory .

Biogen Inc (BIIB) Insider Trades Summary

Over the past 18 months, Stephen A Sherwin made 1 insider transaction in Biogen Inc (BIIB) with a net sale of 8,760. Other recent insider transactions involving Biogen Inc (BIIB) include a net sale of 5,863 shares made by Priya Singhal , a net purchase of 1,235 shares made by Caroline Dorsa , and a net purchase of 455 shares made by Eric K Rowinsky .

In summary, during the past 3 months, insiders sold 3,806 shares of Biogen Inc (BIIB) in total and bought 1,235 shares, with a net sale of 2,571 shares. During the past 18 months, 14,623 shares of Biogen Inc (BIIB) were sold and 1,690 shares were bought by its insiders, resulting in a net sale of 12,933 shares.

Biogen Inc (BIIB)'s detailed insider trading history can be found in Insider Trading Tracker table.

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Biogen Inc Insider Transactions

No Available Data

Stephen A Sherwin Mailing Address

Above is the net worth, insider trading, and ownership report for Stephen A Sherwin. Based on the public information released on the U.S. Securities and Exchange Commission (SEC) website, Stephen A Sherwin's mailing address is: South San Francisco Ca 94080.