John Joseph Byrne - Net Worth and Insider Trading

John Joseph Byrne Net Worth

The estimated net worth of John Joseph Byrne is at least $1.3 Billion dollars as of 2024-05-06. John Joseph Byrne is the Director of White Mountains Insurance Group Ltd and owns about 720,370 shares of White Mountains Insurance Group Ltd (WTM) stock worth over $1.3 Billion. John Joseph Byrne is also the Director of Beyond Inc and owns about 867,090 shares of Beyond Inc (BYON) stock worth over $19 Million. Details can be seen in John Joseph Byrne's Latest Holdings Summary section.

Disclaimer: The insider information is derived from SEC filings. The estimated net worth is based on the assumption that John Joseph Byrne has not made any transactions after 2005-09-08 and currently still holds the listed stock(s).

Transaction Summary of John Joseph Byrne

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John Joseph Byrne Insider Ownership Reports

Based on ownership reports from SEC filings, as the reporting owner, John Joseph Byrne owns 2 companies in total, including White Mountains Insurance Group Ltd (WTM) , and Beyond Inc (BYON) .

Click here to see the complete history of John Joseph Byrne’s form 4 insider trades.

Insider Ownership Summary of John Joseph Byrne

Ticker Comapny Transaction Date Type of Owner
WTM White Mountains Insurance Group Ltd 2005-09-08 director & 10 percent owner
BYON Beyond Inc 2005-08-31 director

John Joseph Byrne Latest Holdings Summary

John Joseph Byrne currently owns a total of 2 stocks. Among these stocks, John Joseph Byrne owns 720,370 shares of White Mountains Insurance Group Ltd (WTM) as of September 8, 2005, with a value of $1.3 Billion and a weighting of 98.53%. John Joseph Byrne also owns 867,090 shares of Beyond Inc (BYON) as of August 31, 2005, with a value of $19 Million and a weighting of 1.47%.

Latest Holdings of John Joseph Byrne

Ticker Comapny Latest Transaction Date Shares Owned Current Price ($) Current Value ($)
WTM White Mountains Insurance Group Ltd 2005-09-08 720,370 1,802.57 1,298,517,351
BYON Beyond Inc 2005-08-31 867,090 22.28 19,318,765

Holding Weightings of John Joseph Byrne


John Joseph Byrne Form 4 Trading Tracker

According to the SEC Form 4 filings, John Joseph Byrne has made a total of 0 transactions in White Mountains Insurance Group Ltd (WTM) over the past 5 years. The most-recent trade in White Mountains Insurance Group Ltd is the sale of 100,000 shares on September 8, 2005, which brought John Joseph Byrne around $66 Million.

According to the SEC Form 4 filings, John Joseph Byrne has made a total of 0 transactions in Beyond Inc (BYON) over the past 5 years. The most-recent trade in Beyond Inc is the acquisition of 85,456 shares on August 31, 2005, which cost John Joseph Byrne around $3 Million.

Insider Trading History of John Joseph Byrne

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.

John Joseph Byrne Trading Performance

GuruFocus tracks the stock performance after each of John Joseph Byrne's buying transactions within different timeframes. To be detailed, the average return of stocks after 3 months bought by John Joseph Byrne is -6.5%. GuruFocus also compares John Joseph Byrne's trading performance to market benchmark return within the same time period. The performance of stocks bought by John Joseph Byrne within 3 months outperforms 1 times out of 5 transactions in total compared to the return of S&P 500 within the same period.

You can select different timeframes to see how John Joseph Byrne'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 John Joseph Byrne

Average Return

Average return per transaction

Outperforming Transactions

1 out of 5 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(%) -1.34
Relative Return to S&P 500(%) -2.67

John Joseph Byrne Ownership Network

Ownership Network List of John Joseph Byrne

No Data

Ownership Network Relation of John Joseph Byrne


John Joseph Byrne Owned Company Details

What does White Mountains Insurance Group Ltd do?

Who are the key executives at White Mountains Insurance Group Ltd?

John Joseph Byrne is the director & 10 percent owner of White Mountains Insurance Group Ltd. Other key executives at White Mountains Insurance Group Ltd include Chief Accounting Officer Michaela Hildreth , EVP & Chief Financial Officer Liam P Caffrey , and EVP & General Counsel Robert Lawrence Seelig .

White Mountains Insurance Group Ltd (WTM) Insider Trades Summary

Over the past 18 months, John Joseph Byrne made no insider transaction in White Mountains Insurance Group Ltd (WTM). Other recent insider transactions involving White Mountains Insurance Group Ltd (WTM) include a net purchase of 2,000 shares made by Weston M Hicks , and a net sale of 100 shares made by Michaela Hildreth .

In summary, during the past 3 months, insiders sold 0 shares of White Mountains Insurance Group Ltd (WTM) in total and bought 0 shares, with a net sale of 0 shares. During the past 18 months, 100 shares of White Mountains Insurance Group Ltd (WTM) were sold and 2,000 shares were bought by its insiders, resulting in a net purchase of 1,900 shares.

White Mountains Insurance Group Ltd (WTM)'s detailed insider trading history can be found in Insider Trading Tracker table.

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White Mountains Insurance Group Ltd Insider Transactions

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John Joseph Byrne Mailing Address

Above is the net worth, insider trading, and ownership report for John Joseph Byrne. Currently GuruFocus does not have mailing address information for John Joseph Byrne.

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