The Federal Trade Commission today gave Facebook approval to move forward with its pricey cash and stock purchase of photo-sharing phenom Instagram.

“The Federal Trade Commission has closed its nonpublic investigation of Facebook’s proposed acquisition of Instagram, Inc., without taking any action,” the FTC said in a bulletin. “Accordingly, the deal may now proceed as proposed.”

The social network agreed to purchase Instagram in early April for $300 million in cash with an additional 23 million shares of common stock. The FTC started its relatively routine probe a month later. The Commission was in search of any antitrust violations, and it pinged rivals Google and Twitter in the process.

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Unfortunately for Instagram, the FTC’s due diligence has cost photo app makers Kevin Systrom, Mike Krieger, and co. a pretty penny — well actually it’s 25 billion pennies. The Facebook-Instagram deal, valued at $1 billion at the time of the original announcement, is now worth roughly $750 million. Facebook’s stock has fallen 50 percent since opening at $38 a share in May. The company’s shares closed at $19.44 Wednesday.

“We are pleased that the Federal Trade Commission has cleared the transaction after its careful and thorough review,” a Facebook spokesperson said in a statement to VentureBeat.

The deal is still pending final close.

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