UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): June 22, 2016 (June 17, 2016)

AXIALL CORPORATION

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code: (770) 395-4500

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

The following items of business were acted upon at the 2016 annual meeting of stockholders of Axiall Corporation (the “Company”) held on June 17, 2016: (1) the election of nine directors to serve until the next annual meeting of stockholders and until their successors are duly elected and qualified; (2) the approval, on an advisory basis, of the compensation of the Company’s named executive officers, as disclosed in the annual meeting proxy statement; (3) the approval of the material terms for qualified performance-based compensation under the 2011 Equity and Performance Incentive Plan, as amended; (4) the approval of the material terms for qualified performance-based compensation under the Company’s Annual Incentive Compensation Plan; and (5) the ratification of the appointment of Ernst & Young LLP to serve as the Company’s independent registered public accounting firm for the year ending December 31, 2016.

The results of voting on the election of directors were as follows:

The results of voting on the approval, on an advisory basis, of the compensation of the Company’s named executive officers as disclosed in the annual meeting proxy statement were as follows:

The results of voting on the approval of the material terms for qualified performance-based compensation under the 2011 Equity and Performance Incentive Plan, as amended, were as follows:

The results of voting on the approval of the material terms for qualified performance-based compensation under the Company’s Annual Incentive Compensation Plan were as follows:

The results of voting on the ratification of the appointment of Ernst & Young LLP to serve as the Company’s independent registered public accounting firm for the year ending December 31, 2016 were as follows:

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: June 22, 2016