Insider Trading History of White Mountains Insurance Group Ltd

The following table details the insider trading activities (stock purchases, stock sales, and stock option exercises) of White Mountains Insurance Group Ltd since 2006. This trader's CIK number is 776867. At the time of last reporting, White Mountains Insurance Group Ltd was the 10% Owner of Mediaalpha, Inc.. (stock ticker symbol MAX). Also see all insider trading activities at Mediaalpha, Inc..

Note that in the past WHITE MOUNTAINS INSURANCE GROUP LTD also reported insider trading activities as an insider of the following companies:

Yearly summary of insider trading at Montpelier Re Holdings Ltd (MRH) by White Mountains Insurance Group Ltd

Insider Buying Insider Sales Option Exercises
Year Symbol Shares Value Shares Value Shares Value
2006 MRH 0 $0 5,370,150 $104,180,909 0 $0

Yearly summary of insider trading at Onebeacon Insurance Group, Ltd. (OB) by White Mountains Insurance Group Ltd

Insider Buying Insider Sales Option Exercises
Year Symbol Shares Value Shares Value Shares Value
2007 OB 0 $0 645,262 $16,680,022 0 $0
2006 OB 0 $0 27,600,000 $650,311,200 0 $0

Yearly summary of insider trading at Mediaalpha, Inc. (MAX) by White Mountains Insurance Group Ltd

Insider Buying Insider Sales Option Exercises
Year Symbol Shares Value Shares Value Shares Value
2021 MAX 0 $0 3,592,204 $165,241,384 0 $0
2020 MAX 0 $0 3,609,894 $68,587,986 0 $0


Insider trading activities at 3 companies by White Mountains Insurance Group Ltd:

1. Montpelier Re Holdings Ltd (MRH)

2. Onebeacon Insurance Group, Ltd. (OB)

3. Mediaalpha, Inc. (MAX)

Table 1. Insider trading of Montpelier Re Holdings Ltd (MRH) by White Mountains Insurance Group Ltd

Trade Date Symbol Trade Type Shares Price ($) Value ($)
2006-09-27 MRH Sale 5,370,150 19.40 104,180,909

Table 2. Insider trading of Onebeacon Insurance Group, Ltd. (OB) by White Mountains Insurance Group Ltd

Trade Date Symbol Trade Type Shares Price ($) Value ($)
2007-03-15 OB Sale 645,262 25.85 16,680,022
2006-11-14 OB Sale 27,600,000 23.56 650,311,200

Table 3. Insider trading of Mediaalpha, Inc. (MAX) by White Mountains Insurance Group Ltd

Trade Date Symbol Trade Type Shares Price ($) Value ($)
2021-03-23 MAX Sale 3,592,204 46.00 165,241,384
2020-10-30 MAX Sale 3,609,894 19.00 68,587,986

Insider trading activities including stock purchases, stock sales, and option exercises listed in the above table cannot be completely guaranteed as to their accuracy. For more information regarding the trades made by White Mountains Insurance Group Ltd (10% Owner of Mediaalpha, Inc. at the time of this reporting) see the Securities and Exchange Commission (SEC) website.



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