Check out which companies are making headlines after the bell Monday:
H&R Block - The tax solutions company reported a second-quarter adjusted loss of 45 cents per share on revenue $135 million, missing estimates for a loss of 42 cents per share. Revenue beat Street estimates at $142 million. Shares declined more than 4 percent on the report.
Verizon - The telecom giant said it saw strong wireless user growth during the fourth quarter. However, it expects promotional offers will put short-term pressure on wireless sector margins and earnings. Shares fell about 1 percent after the report.
Diamond Foods - The snack maker said fiscal first-quarter sales rose 5 percent from a year ago and reaffirmed its full-year 2015 earnings guidance, sending shares up more than 1 percent in after-hours trading.
United Continental - The stock edged lower after the airliner said consolidated capacity for November declined modestly, while load factor was virtually unchanged from October.
T-Mobile - Shares fell some 4 percent in light trading volume after the telecom giant announced a public offering of 17.4 million shares of a mandatory convertible preferred stock—basically a hybrid security between a stock and a bond—with a liquidation preference of $50 per share.
Amazon - Shares of the online retailer remained flat in extended trade after the Wall Street Journal reported that the online retailer plans to use bike messengers to offer one-hour deliveries in New York City. Amazon shares shed about 2 percent during the regular session.
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