Check out which companies are making headlines after the bell Wednesday:
Vera Bradley - The maker of patterned bags and accessories posted earnings of 37 cents a share on sales of $130 million, versus expectations for 33 cents a share on sales of $129 million. But the company handed in current-quarter and 2014 guidance that missed expectations. Shares tumbled after being temporarily halted in extended-hours trading.
(Read more: Stocks end near lows after budget deal, S&P below 1800)
AthenaHealth - The health care technology company handed in 2014 guidance that was weaker than expectations, pushing shares lower in extended-hours trading.
Nordson - The maker of industrial adhesives and coatings posted earnings of 93 cents a share, excluding one-time items, on sales of $411 million, versus estimates for 95 cents a share on revenue of $404 million. But the company handed in lighter-than-expected current-quarter earnings, sending shares lower in extended-hours trading.
Micron - The semiconductor company was upgraded to "buy" from "neutral" at Nomura Securities. Shares were mostly flat in extended-hours trading.
UNS Energy - Diversified electric utility holding company Fortis announced that it has entered into an agreement and plan of merger to acquire UNS for $60.25 per share in cash, valuing the deal at nearly $4.3 billion. UNS shares skyrocketed in extended-hours trading.
Big Lots - The retailer disclosed that it received a subpoena from the District Attorney for the County of Alameda, Calif. in October, seeking information concerning the company's handling of hazardous materials and hazardous waste in California. Shares slipped slightly in extended-hours trading.
KapStone Paper and Packaging - The pulp and paper company announced a 2-for-1 stock split.The stock split will be structured in the form of a stock dividend. Shares were unchanged in extended-hours trading.
MFA Financial - The real estate investment trust cut its quarterly dividend to 20 cents a share from 22 cents a share. The company also increased its stock buyback program by 6 million shares. Shares slid in extended-hours trading.
—By CNBC's JeeYeon Park (Follow JeeYeon on Twitter: @JeeYeonParkCNBC)
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