Check out which companies are making headlines after the bell Wednesday:
Alcoa - Credit ratings agency Moody's downgraded the steelmaker's credit rating to "Ba1" from "Baa3," pushing its recommendation to junk status with a "stable" outlook. Shares slipped in extended-hours trading.
Avago Technologies - The Singaporean semiconductor company posted earnings of 61 cents a share, excluding one-time items, on sales of $562 million. That topped analysts' expectations of 52 cents a share on revenue of $557 million. In addition, the company said it expects to see sequential revenue growth of between 6 percent and 9 percent. Shares rose in extended-hours trading.
(Read More: Stocks End Off Lows, but Fed Worries Weigh)