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 24, 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):

¨ 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))

On May 24, 2012, Chart Industries, Inc. (the “Company”) held its annual meeting of stockholders. At the annual meeting, the Company’s stockholders approved the Chart Industries, Inc. Amended and Restated 2009 Omnibus Equity Plan (the “Amended and Restated Omnibus Equity Plan”). As described in the Company’s definitive proxy statement for the annual meeting, the Company’s directors, officers and employees (including its principal executive officer, principal financial officer and other “named executive officers”) are eligible to be granted awards under the Amended and Restated Omnibus Equity Plan. It is anticipated that awards will be granted to the Company’s officers and directors in the future as may be determined by the Compensation Committee of the Company’s Board of Directors from time to time consistent with terms of the Amended and Restated Omnibus Equity Plan. A more detailed description of the Amended and Restated Omnibus Equity Plan can be found in the Company’s definitive proxy statement for the annual meeting which was filed with the Securities and Exchange Commission (the “SEC”) on April 10, 2012 under “Approval and Adoption of the Chart Industries, Inc. Amended and Restated 2009 Omnibus Equity Plan” and is incorporated herein by reference. A copy of the Omnibus Equity Plan was also attached as Appendix A to the Company’s definitive proxy statement and is included as Exhibit 10.1 and incorporated herein by reference.

At the Company’s annual meeting of stockholders held on May 24, 2012 the following matters were submitted to a vote:

As of the record date of March 27, 2012, there were 29,899,189 shares of common stock outstanding and entitled to vote at the meeting. The holders of 28,027,650 shares were represented in person or by proxy at the meeting, constituting a quorum.

At the annual meeting, all of the proposals were approved as recommended to stockholders in the proxy statement for the meeting. All the directors were elected, the selection of Ernst & Young LLP as the Company’s independent registered public accounting firm for 2012 was ratified, the compensation of the Company’s named executive officers as disclosed in the proxy statement was approved on an advisory basis and stockholders approved and adopted the Amended and Restated Omnibus Equity Plan.

The vote with respect to the election of directors was as follows:

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The vote with respect to the ratification of the selection of Ernst & Young LLP as the Company’s independent registered public accounting firm was as follows:

The advisory vote with respect to the approval of the compensation of the Company’s named executive officers was as follows:

The vote with respect to the approval and adoption of the Amended and Restated Omnibus Equity Plan was as follows:

Consistent with the advisory vote on the frequency of future votes on executive compensation held in 2011, the Company plans to hold an annual advisory vote on executive compensation.

For information on how the votes for the above matters were tabulated, see the Company’s definitive proxy statement used in connection with the annual meeting of stockholders held on May 24, 2012.

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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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