IAC/InterActiveCorp launched a hostile bid to buy Angie's List, a move that could combine two of the sites used by consumers to find contractors and other service providers.
The bid was $512 million in cash, representing a 10 percent premium above the company's market value at the closing of trade yesterday.
Shares climbed as much as 17 percent after hours on the news.
Angie's List counts some 3 million customers nationwide, which use the service to find providers in 720 categories, ranging from home improvement to health care.
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