After-hours buzz: EBay, Synacor, Yahoo & more

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Scott Mlyn | CNBC

Check out which companies are making headlines after the bell Tuesday:

Tekmira Pharmaceuticals - The Canadian biotech that developed a promising drug to treat Ebola surged in after-hours trading after the Centers for Disease Control and Prevention confirmed the first case of the disease had been diagnosed in the United States.

Read MoreEbola stocks surge after first US case diagnosed

American Science & Engineering - The developer of X-ray inspection and other detection products fell in after-hours trading after it said it would cut its workforce by about 10 percent as it anticipates a net loss in the second quarter of fiscal 2015.

D.R. Horton - The builder edged lower after saying CEO Donald Tomnitz would retire, effective Wednesday, and be replaced by Chief Operating Officer David Auld.

EBay - The online-auction site extended gains in after-hours trading after saying it would split from PayPal, its payments unit, early in 2015.

Synacor - The supplier of cloud-based devices for cable and other companies rallied in after-hours trading on news it plans to cut 70 positions, about 20 percent of its workforce.

Yahoo - The search engine edged higher after saying it received $9.4 billion in net proceeds from the Alibaba IPO.

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