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) August 2, 2012

CHART INDUSTRIES, INC.

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code: (440) 753-1490

(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 (see General Instruction A.2. below):

On August 2, 2012, Chart Industries, Inc. (the “Company”) issued a news release announcing the Company’s financial results for the second quarter ended June 30, 2012. A copy of the news release is furnished with this Current Report on Form 8-K as Exhibit 99.1. All information in the news release is furnished and shall not be deemed “filed” with the Securities and Exchange Commission for purposes of Section 18 of the Exchange Act, or otherwise be subject to the liability of that Section, and shall not be deemed to be incorporated by reference into any filing under the Securities Act or the Exchange Act, except to the extent the Company specifically incorporated it by reference.

The news release furnished with this Current Report on Form 8-K as Exhibit 99.1 includes an adjusted earnings per share amount that excludes acquisition related earn-out adjustments and other acquisition and refinancing related charges recorded in the quarter. Also included for purposes of period-to-period comparison is an adjusted earnings per share amount for the second quarter of 2011 which excludes certain acquisition-related restructuring costs that were recognized in that quarter. These adjusted earnings per share measures are not recognized under generally accepted accounting principles (“GAAP”) and are referred to as “non-GAAP financial measures” in Regulation G under the Securities Act. The Company believes these adjusted earnings per share amounts are of interest to investors and facilitate useful period-to-period comparisons of the Company’s financial results, and this information is used by the Company in evaluating internal performance. The adjusted earnings per share amounts are reconciled to earnings per share in a table at the end of the news release.

(d) Exhibits.

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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.

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EXHIBIT INDEX

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