<PAGE>
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
-------------
FORM 8-K
CURRENT REPORT
Pursuant to Section 13 or 15(d) of the Securities
Exchange Act of 1934
JUNE 8, 1999
Date of Report (Date of earliest event reported)
WHITE MOUNTAINS INSURANCE GROUP, INC.
(Exact name of registrant as specified in its charter)
DELAWARE 1-8993 94-2708455
(State or other jurisdiction of (Commission (I.R.S. Employer
incorporation or organization) file number) Identification No.)
80 SOUTH MAIN STREET, HANOVER, NH 03755
(Address of principal executive offices)
(603) 643-1567
(Registrant's telephone number, including area code)
<PAGE>
ITEM 5. OTHER INFORMATION
On June 8, 1999, the Registrant repurchased 450,000 shares of its common stock,
par value $1.00, ("Shares") in a private transaction with an unaffiliated party
for a total of $67.5 million (the "Repurchase"). The Repurchase involves
approximately 8% of the Registrant's Shares currently outstanding. The
Repurchase will be funded with cash on hand and the Registrant intends to hold
the Shares acquired in its treasury.
<PAGE>
SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.
White Mountains Insurance Group, Inc.
Dated: June 9, 1999 By: /s/
--------------------------------------------
Michael S. Paquette
Senior Vice President and
Controller