White Mountains spin-off OneBeacon Insurance prices 24mm shares at $25

OneBeacon, a provider of property and casualty insurance coverage to small and medium-sized companies and a spin-off of White Mountains, priced 24 million shares (4 million shares more than expected) at $25, the mid-point of its $24-$26 range. Lehman Brothers acted as the lead manager for the IPO, and the stock is expected to commence trading on the NYSE under the ticker symbol "OB" on Thursday.