Beth C Seidenberg - Net Worth and Insider Trading

Beth C Seidenberg Net Worth

The estimated net worth of Beth C Seidenberg is at least $460 Million dollars as of 2025-03-03. Beth C Seidenberg is the Director of Tesaro Inc and owns about 2,934,321 shares of Tesaro Inc (TSRO) stock worth over $220 Million. Beth C Seidenberg is the Director of Progyny Inc and owns about 8,984,120 shares of Progyny Inc (PGNY) stock worth over $202 Million. Beth C Seidenberg is also the Director, 10% Owner of Acelyrin Inc and owns about 9,850,729 shares of Acelyrin Inc (SLRN) stock worth over $26 Million. Besides these, Beth C Seidenberg also holds Sagimet Biosciences Inc (SGMT) , Vera Therapeutics Inc (VERA) , BioCryst Pharmaceuticals Inc (BCRX) , Atara Biotherapeutics Inc (ATRA) . Details can be seen in Beth C Seidenberg'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 Beth C Seidenberg has not made any transactions after 2024-10-28 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 Beth C Seidenberg

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Beth C Seidenberg Insider Ownership Reports

Based on ownership reports from SEC filings, as the reporting owner, Beth C Seidenberg owns 10 companies in total, including Progyny Inc (PGNY) , Atara Biotherapeutics Inc (ATRA) , and Epizyme Inc (EPZM) among others .

Click here to see the complete history of Beth C Seidenberg’s form 4 insider trades.

Insider Ownership Summary of Beth C Seidenberg

Ticker Comapny Transaction Date Type of Owner
PGNY Progyny Inc 2021-11-17 director
ATRA Atara Biotherapeutics Inc 2021-06-08 director
EPZM Epizyme Inc 2019-03-31 director
LIMIT LIMIT 2019-01-22 director
LIMIT LIMIT 2018-06-22 director
LIMIT LIMIT 2006-05-03 director
LIMIT LIMIT 2003-07-01 Sr VP Development
LIMIT LIMIT 2024-10-28 director
LIMIT LIMIT 2023-05-09 director & 10 percent owner
LIMIT LIMIT 2023-07-18 director

Beth C Seidenberg Latest Holdings Summary

Beth C Seidenberg currently owns a total of 7 stocks. Among these stocks, Beth C Seidenberg owns 2,934,321 shares of Tesaro Inc (TSRO) as of March 18, 2016, with a value of $220 Million and a weighting of 47.76%. Beth C Seidenberg owns 8,984,120 shares of Progyny Inc (PGNY) as of April 15, 2021, with a value of $202 Million and a weighting of 43.96%. Beth C Seidenberg also owns 9,850,729 shares of Acelyrin Inc (SLRN) as of May 9, 2023, with a value of $26 Million and a weighting of 5.75%. The other 4 stocks Sagimet Biosciences Inc (SGMT) , Vera Therapeutics Inc (VERA) , BioCryst Pharmaceuticals Inc (BCRX) , Atara Biotherapeutics Inc (ATRA) have a combined weighting of 2.53% among all his current holdings.

Latest Holdings of Beth C Seidenberg

Ticker Comapny Latest Transaction Date Shares Owned Current Price ($) Current Value ($)
TSRO Tesaro Inc 2016-03-18 2,934,321 74.96 219,956,702
PGNY Progyny Inc 2021-04-15 8,984,120 22.53 202,412,224
SLRN Acelyrin Inc 2023-05-09 9,850,729 2.69 26,498,461
SGMT Sagimet Biosciences Inc 2023-07-18 2,031,118 3.72 7,545,603
VERA Vera Therapeutics Inc 2024-10-28 135,565 29.90 4,053,394
BCRX BioCryst Pharmaceuticals Inc 2006-05-03 3,000 8.60 25,800
ATRA Atara Biotherapeutics Inc 2014-10-15 892 6.92 6,173

Holding Weightings of Beth C Seidenberg


Beth C Seidenberg Form 4 Trading Tracker

According to the SEC Form 4 filings, Beth C Seidenberg has made a total of 0 transactions in Tesaro Inc (TSRO) over the past 5 years. The most-recent trade in Tesaro Inc is the acquisition of 1,420,858 shares on March 18, 2016, which cost Beth C Seidenberg around $50 Million.

According to the SEC Form 4 filings, Beth C Seidenberg has made a total of 4 transactions in Progyny Inc (PGNY) over the past 5 years, including 0 buys and 4 sells. The most-recent trade in Progyny Inc is the sale of 18,127 shares on April 15, 2021, which brought Beth C Seidenberg around $912,151.

According to the SEC Form 4 filings, Beth C Seidenberg has made a total of 1 transactions in Acelyrin Inc (SLRN) over the past 5 years, including 1 buys and 0 sells. The most-recent trade in Acelyrin Inc is the acquisition of 1,310,000 shares on May 9, 2023, which cost Beth C Seidenberg around $24 Million.

More details on Beth C Seidenberg's insider transactions can be found in the Insider Trading History of Beth C Seidenberg table.

Insider Trading History of Beth C Seidenberg

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.

Beth C Seidenberg Trading Performance

GuruFocus tracks the stock performance after each of Beth C Seidenberg's buying transactions within different timeframes. To be detailed, the average return of stocks after 3 months bought by Beth C Seidenberg is 36.09%. GuruFocus also compares Beth C Seidenberg's trading performance to market benchmark return within the same time period. The performance of stocks bought by Beth C Seidenberg within 3 months outperforms 11 times out of 15 transactions in total compared to the return of S&P 500 within the same period.

You can select different timeframes to see how Beth C Seidenberg'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 Beth C Seidenberg

Average Return

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Average return per transaction

Outperforming Transactions

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12 out of 15 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(%) -2.21 LIMIT LIMIT LIMIT LIMIT LIMIT
Relative Return to S&P 500(%) -2.78 LIMIT LIMIT LIMIT LIMIT LIMIT

Beth C Seidenberg Ownership Network

Ownership Network List of Beth C Seidenberg

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Ownership Network Relation of Beth C Seidenberg

Insider Network Chart

Beth C Seidenberg Owned Company Details

What does Progyny Inc do?

Who are the key executives at Progyny Inc?

Beth C Seidenberg is the director of Progyny Inc. Other key executives at Progyny Inc include director & Executive Chairman David J Schlanger , Chief Executive Officer Peter Anevski , and President Michael E Sturmer .

Progyny Inc (PGNY) Insider Trades Summary

Over the past 18 months, Beth C Seidenberg made no insider transaction in Progyny Inc (PGNY). Other recent insider transactions involving Progyny Inc (PGNY) include a net sale of 411,000 shares made by David J Schlanger , a net sale of 47,686 shares made by Michael E Sturmer , and a net sale of 73,881 shares made by Mark S. Livingston .

In summary, during the past 3 months, insiders sold 0 shares of Progyny Inc (PGNY) in total and bought 359,500 shares, with a net purchase of 359,500 shares. During the past 18 months, 686,529 shares of Progyny Inc (PGNY) were sold and 359,500 shares were bought by its insiders, resulting in a net sale of 327,029 shares.

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

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Progyny Inc Insider Transactions

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Beth C Seidenberg Mailing Address

Above is the net worth, insider trading, and ownership report for Beth C Seidenberg. Currently GuruFocus does not have mailing address information for Beth C Seidenberg.