Mergers and Acquisitions

St. Jude Medical agreed to buy Endosense for up to $230 million, providing it with catheter technologies that can be used during heart surgeries.

Onyx Pharmaceuticals has reportedly been approached by a slew of drug giants, including Pfizer and Novartis. 

Shares of Onyx Pharmaceuticals surged 51% after the drug giant turned down a buyout offer from Amgen and said it was actively pursuing bids.

Novartis agreed to sell its blood transfusion testing unit to Spain's Grifols for $1.68 billion.

Community Health Systems said it will scoop up smaller rival Health Management Associates  for $3.9 billion to strengthen its base amid tumult in the health-care industry.

Nestle agreed to sell most of its Jenny Craig diet business to the private equity firm as the world’s largest food group looks to slim down.

Aetna Inc. said Friday that it had agreed to buy Humana Inc. for $34.1 billion in cash and stock, following weeks of frenzied merger talks among the largest health insurers.

Health insurer Aetna's proposed acquisition of smaller rival Humana Inc was approved by the shareholders of both companies.

The Chemours Co. is closing its Delaware titanium dioxide production facility, which employs about 200 workers, the former performance chemicals business spun off from the DuPont Co. said Thursday.

A little-used gas-fired power plant built by the Southern Montana Electricity Generation and Transmission Cooperative and at least partly blamed for the wholesale electricity supplier's 2011 bankruptcy will be taken apart and resold for its parts.

European Union regulators on Tuesday approved Pfizer's $15.23 billion purchase of injectable drug and infusion device maker Hospira.

McGraw Hill Financial, owner of ratings agency Standard & Poor's, is buying SNL Financial for about $2.23 billion.

Japanese media reports say automaker Mitsubishi Motors has decided to end production in the U.S. to focus on Asian markets.

A Michigan union pledged to try to stop a three-year, $158 million prison food contract approved Tuesday, questioning the lack of a new bid and saying state employees should again be doing the work instead.

Michigan is terminating a three-year $145 million contract with the company that feeds state prisoners.

GlobalFoundries announced Wednesday it had completed its purchase of IBM's microchip plants in Vermont and New York, giving a new lease on life to a big employer in Vermont and New York's Duchess County.

Martha Stewart Living is being acquired in a cash-and-stock deal valued at about $353 million.

Here are milestones for Martha Stewart Living Omnimedia Inc.

Here are milestones for Martha Stewart Living Omnimedia Inc.

Stocks that moved substantially or traded heavily Monday on the New York Stock Exchange and the Nasdaq Stock Market: NYSE United Technologies Corp., down $2.99 to $114.61 The conglomerate is shedding helicopter maker Sikorsky and will focus on high-technology products for the aerospace industry.