After-hours buzz: Mattress Firm, FleetCor, Gulfport & more

Check out the companies making headlines after the bell Tuesday:

Mattress Firm - The bedding retailer said its operation in the Chicago market during earlier this year affected quarterly results as it "worked to convert the stores," leading to a loss of 7 cents per diluted share, excluding acquisition-related costs. The stock fell as much as 1 percent after hours.

Prudential Financial - The insurance and investment management provider said its board approved a buyback of up to $1 billion of common stock. Prudential shares edged higher after hours.

Sears - The retailer reported a narrower-than-expected loss Tuesday morning and said it plans to launch a REIT rights offering. Shares jumped nearly 7 percent in extended trading after closing the regular session 6 percent lower.

FleetCor - The gas payments processor said it secured a deal with Uber to supply the Partner Fuel Card, a universal card program for Uber's U.S. drivers. FleetCor shares rose about 3 percent after hours.

Gulfport Energy - The oil and gas producer launched an offering of 10 million shares of common stock after the bell. Shares fell more than 5 percent in light volume, before recovering.