WeWork , an office developer, believes it can be as transformational to its industry as upstarts like Airbnb and Uber are in travel and transportation. The four-year-old company, which divvies up rented office space and sublets mostly to startups, said on Monday it closed a $355 million funding round. The deal values the company at about $5 billion, said people close to the matter. The valuation puts the small New York-based company in the same league as social bookmarking site operator Pinterest Inc. and media and Internet company IAC/InterActiveCorp.