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): May 26, 2016

AXIALL CORPORATION

(Exact name of registrant as specified in its charter)

Delaware |  | 1-09753 |  | 58-1563799
(State or other jurisdiction of incorporation) |  | (Commission File Number) |  | (IRS Employer Identification No.)
1000 Abernathy Road, Suite 1200, Atlanta, GA |  | 30328
(Address of principal executive offices) |  | (Zip Code)

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:

¨ | Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨ | Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨ | Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2 (b))

¨ | Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4 (c))

Item 7.01 | Regulation FD Disclosure.

Axiall Corporation (the “Company”) has prepared a presentation that it expects it may use in connection with meetings with certain of the Company’s investors beginning on May 26, 2016, a copy of which is furnished as Exhibit 99.1 hereto and incorporated herein by reference. On May 26, 2016, the Company issued a press release regarding the investor presentation, a copy of which is furnished as Exhibit 99.2 and incorporated herein by reference.

This information shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934 (the “Exchange Act”), or incorporated by reference in any filing under the Securities Act of 1933 or the Exchange Act, except as shall be expressly set forth by specific reference in such a filing.

Item 9.01 | Financial Statements and Exhibits.

(d) Exhibits

Exhibit Number |  | Description
99.1 |  | Investor Presentation, dated May 26, 2016.
99.2 |  | Press Release, dated May 26, 2016.

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.

|  | AXIALL CORPORATION
|  | By: |  | /s/ Daniel S. Fishbein
|  | Name: |  | Daniel S. Fishbein
|  | Title: |  | Vice President & General Counsel

Date: May 26, 2016

EXHIBIT INDEX

Exhibit Number |  | Description
99.1 |  | Investor Presentation, dated May 26, 2016.
99.2 |  | Press Release, dated May 26, 2016.