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, 2016

Graham Corporation

(Exact name of Registrant as specified in its charter)

Registrant’s telephone number, including area code: (585) 343-2216

N/A

(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:

Fiscal 2017 Annual Stock-Based Long-Term Incentive Award Plan for Senior Executives. On May 24, 2016, the Compensation Committee of the Board of Directors (the “Compensation Committee”) of Graham Corporation (the “Company”) renewed and amended its Annual Stock-Based Long-Term Incentive Award Plan for Senior Executives (the “Restricted Stock Bonus Program”) for the fiscal year ending March 31, 2017 (“Fiscal 2017”) and approved grants of time-vested restricted stock and performance-vested restricted stock thereunder in the amounts set forth below to the Company’s named executive officers. All grants were made under the Amended and Restated 2000 Graham Corporation Incentive Plan to Increase Shareholder Value (the “Plan”).

Time-vested restricted stock awards are designed to encourage the Company’s named executive officers to remain employed by the Company. The time-vested restricted stock granted to the Company’s named executive officers vests 33 1/3% per year over three years and the time-vested restricted stock granted to the Company’s Directors, as described below, vests on the first anniversary of the date of grant

Performance-vested restricted stock awards are designed to incent the Company’s named executive officers to focus on Company growth, align their compensation with the Company’s business strategy and to create stockholder value. Awards of performance-vested restricted stock vests: (i) 50% based upon the Company’s achievement over a three year period of Total Shareholder Return compared to the Russell 2000 Capital Goods and Energy Composite Ranking (using a 20 day price average at the start and end of the three year period commencing April 1, 2016 and ending March 31, 2019) (“Relative TSR”); and (i) 50% based on the EBITDA margin of Company for the fiscal year ending March 31, 2019 (“Fiscal 2019”) compared to the Baird Industrial Company Composite as of December 2018 (“Relative EBITDA”). The threshold, target and maximum payout matrixes for the performance-vested restricted stock are set forth below:

Relative TSR⁽¹⁾

⁽¹⁾ If the Company’s TSR is negative, maximum payout is Target.

Relative EBITDA

The number of shares of time-vested restricted stock and performance-vested restricted stock awarded to the Company’s named executive officers under the Restricted Stock Bonus Program were determined using a Long-Term Incentive Percentage (the “L-T Percentage”) for each such officer. On May 24, 2016, the Compensation Committee set the L-T Percentage for each of the Company’s named executive officers as follows: Mr. Lines – 90%; Mr. Glajch – 65%; Mr. Smith – 65%; and Ms. Condame – 45%. The number of shares of time-vested restricted stock awarded were determined by multiplying 50% of each named executive officer’s base salary in effect on the date of grant by such officer’s L-T Percentage, and then dividing the product by the closing price of the Company’s Common Stock on the NYSE on the date of grant. The number of shares of performance-vested restricted stock was determined by multiplying 50% of each named executive officer’s base salary in effect on the date of grant by such officer’s L-T Percentage, and then dividing the product by the closing price of the Company’s Common Stock on the NYSE on the date of grant. The number of shares of restricted stock awarded to each of the Company’s Directors was determined by dividing $25,000 by the closing price of the Company’s Common Stock on the NYSE on the date of grant. The closing price of the Company’s Common Stock on the NYSE on May 24, 2016 was $18.50.

Annual Stock-Based Grant to Non-Employee Directors. Also on May 24, 2016, the Compensation Committee approved the grant of time-vested restricted stock under the Plan in the amounts set forth below to the Company’s non-employee Directors.

The Restricted Stock Bonus Program in effect for Fiscal 2017 is attached to this Current Report on Form 8-K as Exhibit 99.1 and the above summary of the Restricted Stock Bonus Program is qualified in its entirety by reference to such Exhibit.

Fiscal 2017 Annual Executive Cash Bonus Program. On May 24, 2016, the Compensation Committee renewed and amended the Company’s Annual Executive Cash Bonus Program (the “Cash Bonus Program”) for Fiscal 2017. The objective of the Cash Bonus Program is to motivate the Company’s named executive officers to attain short-term objectives through an annual cash bonus related both to Company and personal performance. On May 24, 2016, the Compensation Committee set target bonus levels under the Cash Bonus Program for Fiscal 2017 at 100% attainment of both Company and personal objectives, as follows: Mr. Lines — 70% of base salary; Mr. Glajch — 50% of base salary; Mr. Smith — 50% of base salary; and Ms. Condame — 35% of base salary. Each named executive officer will be eligible to receive anywhere from 0% to 200% of his or her target bonus level depending on the attainment of such objectives. A summary of the performance goal weightings for the Company’s named executive officers for Fiscal 2017 is as follows:

The Cash Bonus Program in effect for Fiscal 2017 is attached to this Current Report on Form 8-K as Exhibit 99.2 and the above summary of the Cash Bonus Program is qualified in its entirety by reference to such Exhibit.

Fiscal 2016 Named Executive Officer Bonuses. On May 24, 2016, the Compensation Committee approved the payment of cash bonuses to the Company’s named executive officers, as set forth below. Such bonuses were approved in accordance with the Company’s Annual Executive Cash Bonus Program in effect for the fiscal year ending March 31, 2016 (“Fiscal 2016”) and were based on the Company’s achievement during Fiscal 2016 of net income and contribution dollars of executable backlog as well as the achievement of personal objectives by each named executive officer during such year.

Amendment to Supplemental Executive Retirement Plan. Also on May 24, 2016, the Compensation Committee approved an amendment and restatement of Exhibit B to the Graham Corporation Supplemental Executive Retirement Plan (the “SERP”). The amendment and restatement of Exhibit B was adopted in order provide through December 31, 2020 that the Plan benefit calculation for James R. Lines will be based on an average of Mr. Lines’ compensation following his base salary increase in effect as of April 1, 2016 (instead of using the prior five-year base salary average) and that commencing January 1, 2021 the SERP will again use a five-year average of Mr. Lines’ compensation to calculate his SERP benefits. A copy of amended and restated Exhibit B to the SERP is attached to this Current Report on Form 8-K as Exhibit 99.3 and the above summary of the amendment and restatement of Exhibit B to the SERP is qualified in its entirety by reference to such Exhibit.

(d) Exhibits.

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.