Check out the companies making headlines after the bell Wednesday:
Shares of First Solar tanked after the company announced 2016 financial guidance that disappointed investors on the revenue end. The company is expecting revenue of $3.9 billion to $4.1 billion, compared to consensus estimates of $4.10 billion, according to Thomson Reuters. Guidance for earnings per share came in at a range of $4 to $4.50, beating estimates for $3.98.
Solar power systems company, SunPower, was down on hopes it can raise $350 million through a private offering of convertible debentures.
Avon moved down on a Wall Street Journal report that two of the company's top executives will leave the troubled cosmetics company.
Shares of both Dow Chemical and DuPont moved in after-hours trading on earlier news that the companies are expected to announce a mega-merger by Thursday. Sources told CNBC that a potential tie-up between the storied chemicals behemoths would be structured as a merger of equals.
Pipeline operator Kinder Morgan inched up after it cut its quarterly dividend by 75 percent, saying it would help fund expansion and maintain its credit rating.
Shares of SunEdison fell after the solar energy company cut the cash portion of its offer for Vivint Solar and boosted the deal's stock component.
J.C. Penney shares were slightly higher despite earlier news that the U.S. government is suing the department store operator over claims of false advertising on textile fiber products.
— The AP contributed to this report.