Switzerland's Roche to buy InterMune, US-based developer of lung disease drugs, in $8.3B deal

Swiss pharmaceutical company Roche says it will buy a California-based developer of treatments for lung diseases, InterMune Inc., in a deal worth $8.3 billion.

Roche said Sunday the companies have reached an agreement under which Roche will acquire InterMune in an all-cash transaction, paying $74.00 per InterMune share. That's a premium of 38 percent over InterMune's closing price on Friday.

The Swiss firm says the acquisition the biotechnology company, based in Brisbane, California, "will allow Roche to broaden and strengthen its respiratory portfolio globally."