Check out the companies making headlines after the bell Wednesday:
Shares of Viacom got a boost after Sumner Redstone's physicians publicly attested that he is mentally capable, says William Schwartz, chairman of Viacom's governance and nominating committee. Schwartz addressed the topic in an email to Reuters Wednesday afternoon.
American Eagle Outfitters moved higher on positive news about its holiday sales. The teen apparel retailer said the season is off to a "solid start" and named interim CEO Jay Schottenstein as its permanent CEO.
Shares of Avon Products inched up after hours on unsubstantiated chatter about the possibility of Oprah Winfrey taking a stake in the cosmetics retailer. Avon declined to comment on the rumors; a spokesperson for Oprah Winfrey denied that the media mogul was taking a stake.
After closing down more than 60 percent, shares of Zafgen were slightly higher in extended trade. Earlier in the session, the biotechnology company reported a second patient death in a late-stage clinical trial of its lead drug candidate, beloranib.