Actavis agreed to acquire Warner Chilcott for about $5 billion in an all-stock deal aimed at enlarging Actavis's portfolio of specialty pharmaceutical brands and shrinking its tax burden.

Yahoo's $1.1 billion deal for Tumblr is a fairy-tale ending for the blogging site, which fetched a rich price despite its meager revenue. Many other highflying Web startups may not be as lucky.

GrubHub and Seamless, two tech startups that make it easier to order takeout food from restaurants, are merging, although they will remain separate brands.

Mark Hayes was a Washington policy wonk on a long and steady ascent. A series of emails to a client was all it took to put that carefully crafted career on hold.

Martin Essex discovers who is making waves as a top stock picker in this first Europe's Best Analysts survey?

For all the talk that "Wall Street is back" from the ravages of the 2008-2009 crisis, there are signs that the financial industry is undergoing a profound transformation, writes Francesco Guerrera.

Caterpillar announced a plan to resume talks with the United Steelworkers union at a plant in South Milwaukee, Wis.

Online design retailer Fab is in advanced talks to raise $250 million to $300 million in venture capital in a deal that would value the fast-growing but unprofitable company at $1 billion not including the new capital.

Thomson Reuters and Markit, rival data providers, have teamed up with investment banks to build a new messaging service to challenge competitor Bloomberg LLP.

Shipping giant China Cosco's 43%-owned Cosco Pacific said it will sell its entire stake in a container company for $1.22 billion.