Take a look at some of Tuesday's after-hours buzz:
Apple climbed more than 1.5 percent after an initial dip in extended-hours trade following expectations. The company said it did not see any slowdown in China during the quarter, but overall, iPhone and iPad sales fell slightly short of expectations, according to StreetAccount.
Twitter plunged in extended-hours trade after giving weaker-than-expected fourth-quarter revenue guidance of $695 million to $710 million, versus the $740 million consensus forecast. However, third-quarter earnings soundly topped expectations on both the top and bottom line.
Akamai Technologies plunged more than 10 percent in after-hours trade after giving fourth-quarter revenue guidance below FactSet expectations. The firm posted third-quarter results that slightly beat expectations for both earnings and revenue.
Gilead Sciences held about 1 percent lower after bouncing a bit in extended-hours trade, despite a beat on both the top and bottom line.
Express Scripts fell 1.5 percent in extended-hours trade after posting earnings per share of $1.45, slightly beating estimates, on revenue of $25.22 billion, which just missed expectations.
TransUnion jumped 3 percent in after-hours trade following third-quarter earnings that showed a 15 percent increase in revenue from the same quarter last year. The credit reporting agency and information solutions provider also raised its full-year guidance.
Northrop Grumman spiked more than 3.5 percent in extended-hours trade after winning a major contract with the U.S. Department of Defense for the Long Range Strike Bomber. Shares of Boeing and Lockheed Martin declined more than 1.5 percent and 3.5 percent, respectively, in after-hours trade.
Walgreens Boots Alliance jumped more than 1 percent in after-hours trade on the official announcement it would buy Rite Aid for $9 a share. Rite Aid shares fell more than 6 percent in extended-hours trade following a 42.6 percent gain in Tuesday's session.