Dealbook: Berkshire Hathaway To Buy Lubrizol For $9 Billion

According to internal documents obtained by the website TechCrunch, Microsoft has offered $1 billion for the digital assets of Nook Media, Barnes & Noble's digital book venture.According to internal documents obtained by the website TechCrunch, Microsoft has offered $1 billion for the digital assets of Nook Media, Barnes & Noble's digital book venture. The deal would give Microsoft Barnes & Noble's e-books, homegrown games and of course its Nook e-readers and tablets. But perhaps not for long: Nook plans to discontinue its Android-based tablet business by the end of 2014, according to the documents. Instead, the company will transition to having Nook content available solely on third-party devices, perhaps ones made by Microsoft, if the purchase goes through.

Germany drug company Bayer AG says it intends to buy California-based Conceptus to expand its birth control offerings. Bayer said Monday it would launch a public offer to pay $31.00 per share for all the stock in Conceptus, Inc. That means Bayer would pay $1.1 billion. Conceptus makes Essure, an irreversible birth control method in which metal and polyester coils are inserted to block a woman's fallopian tubes. The procedure can be done in 10 minutes a doctor's office. Conceptus CEO D. Keith Grossman was quoted in a Bayer statement as saying Essure "will benefit in new markets from Bayer's global presence." The deal is subject to approval by antitrust authorities and could be completed by midyear. Conceptus is based in Mountain View, California and employs about 300 people.

Disclosure: I was an early employee at Pulse, but left six months prior to the acquisition.

(Reuters) - Dish Network Corp, the No. 2 U.S. satellite television provider, on Monday offered to buy wireless service provider Sprint Nextel Corp for $25.5 billion in cash and stock, a move that could inspire other telecommunications or video companies to consider their own prospects of combining.

Dish Network is offering to buy Sprint Nextel Corp. in a cash-and-stock deal it values at $25.5 billion, saying its bid is superior to that of Japanese phone company SoftBank.