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):

November 15, 2017

(Exact name of registrant as specified in its charter)

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))

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company                    ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act  ☐

On November 15, 2017, the Board of Directors (the "Board") of Cabot Microelectronics Corporation (the "Corporation") and the Compensation Committee of the Board approved the performance goals for the Corporation, upon which cash bonus awards that may be paid to the Corporation's executive officers and other employees under the Corporation's Short Term Incentive Program ("STIP"), which operates pursuant to the Cabot Microelectronics Corporation 2012 Omnibus Incentive Plan ("OIP"), for the fiscal year ending September 30, 2018 ("Fiscal 2018"), are intended to be based.  The performance goals for Fiscal 2018 are financial goals that include revenue, gross profit, expressed as a percentage of revenue, and operating income, expressed as a percentage of revenue.  Any cash bonus award amounts pursuant to the STIP and OIP will be determined for each participant based on levels of attainment of the indicated goals by the Corporation, as well as the attainment of individual performance objectives, as assessed by the Compensation Committee of the Board using its discretion.  Such assessment may include consideration of macroeconomic and other factors, whether or not able to be generally foreseen, that may impact the Corporation's performance during Fiscal 2018.

SIGNATURE

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.