John Joseph Byrne serves as Executive at WHITE MOUNTAINS INSURANCE GROUP LTD, where they oversee executive responsibilities. Since joining the company, John Joseph Byrne has executed 6 insider transactions totaling $0, demonstrating a balanced approach to their equity position. Their most recent transaction on Jul 11, 2012 involved selling 50,000 shares valued at $26.4M.
John Joseph Byrne currently holds 635,896 shares of WHITE MOUNTAINS INSURANCE GROUP LTD (WTM), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, John Joseph Byrne has been a net neutral trader of WTM stock. They have purchased $0 and sold $0 worth of shares.
John Joseph Byrne's most recent insider trade was on Jul 11, 2012, when they sold 50,000 shares at $528.45 per share.
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| 2,500 |
| $13.92 |
| Discretionary |
| Aug 15, 2006 | WTM | $0 | Gift | 1,220 | $N/A | Discretionary |
| May 17, 2006 | WTM | $0 | Purchase | 4,325 | $N/A | Discretionary |
| Jan 19, 2006 | WTM | $0 | Gift | 553 | $N/A | Discretionary |
| Dec 27, 2005 | WTM | $0 | Gift | 10,490 | $N/A | Discretionary |