Check out which companies are making headlines after the bell Wednesday:
Facebook — The social-networking company fluctuated, lately lower, in after-hours trading after posting quarterly earnings and revenue that surpassed expectations.
Las Vegas Sands — The casino operator gained in after-hours trading after it hiked its dividend.
Tractor Supply — The operator of farm-and-ranch stores declined after releasing quarterly results.
Qualcomm — The technology provider fell in after-hours trading after it cut its chip guidance for the second half of 2015.
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