In a bid to strengthen its mobile business, Googleannounced on Monday that it would acquire Motorola Mobility Holdings, the cellphone business that was split from Motorola, for $40 a share in cash, or $12.5 billion.

The offer — by far Google’s largest ever for an acquisition — is 63 percent above the closing price of Motorola Mobility shares on Friday. Motorola manufactures phones that run on Google’s Android software.

http://dealbook.nytimes.com/2011/08/15/google-to-buy-motorola-mobility/?hp