Check out the companies making headlines after the bell Wednesday:Â
Shares of Facebook were boosted after the social media company reported more active users and posted quarterly earnings that were well above analyst estimates. The company reported adjusted first-quarter earnings of 77 cents per share on revenue of about $5.38 billion. Analysts had expected Facebook to report earnings of about 62 cents per share on $5.26 billion in revenue, according to a consensus estimate from Thomson Reuters.
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Facebook also reported Wednesday that monthly active users, a key metric for the company also known as MAUs, were 1.65 billion at the end of the first quarter. Wall Street had only expected 1.63 billion, according to StreetAccount. The earnings announcement included a proposal that would create new class C shares, a move that could allow Facebook CEO Mark Zuckerberg to liquidate some of his shares while maintaining control in the company.Â
PayPal shares popped after the payment technology firm reported better-than-anticipated quarterly results, thanks to the addition of new merchants like Air France, Crate and Barrel, Fresh Direct, Panera Bread, Sephora, and Woolworths in Australia. Earnings hit 37 cents per share, excluding items, the company said, more than the 35 cents predicted by analysts. Sales were $2.54 billion in the first quarter, above the $2.5 billion expected.Â
Marriott International edged higher after its quarterly results topped Wall Street's estimates as the company added rooms and established new brands. The hotelier earned 87 cents per share, excluding items, on $3.77 billion in sales. Estimates were for 84 cents per share on $3.69 billion in revenues. The company is on the cusp of a merger with fellow hospitality company Starwood after winning a high-profile bidding war.Â

Car parts retailer O'Reilly's stock fell after it gave investors guidance for the second quarter that missed estimates. The company now expects diluted earnings per share of $2.54 to $2.64 in the second quarter, below the $2.77 Wall Street was expecting. Still, O'Reilly reported first-quarter earnings of $2.59 per share on revenues of $2.1 billion, better than the $2.49 per share on revenues of $2.06 billion expected by analysts.Â
Shares of First Solar sank after the bell after the solar power plant company announced its CEO would be replaced. Mark Widmar, now chief financial officer, will replace James Hughes as CEO in July, the company said in a statement. Hughes will remain on the board.Â
First Solar also reported earnings that beat expectations, although its revenues fell short because of timing issues. It posted earnings of $1.66 per share, more than the 93 cents per share expected. But revenues were $848 million, below the $967 million expected.Â
— CNBC's Alex Crippen and Everett Rosenfeld contributed to this report.Â