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):

September 1, 2015

(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))

On September 1, 2015, Cabot Microelectronics Corporation (the "Company") issued a press release entitled "Geoffrey Wild Elected to Cabot Microelectronics' Board of Directors", a copy of which is attached hereto as Exhibit 99.1 and incorporated herein by reference, announcing that Geoffrey Wild has been elected to the Company's Board of Directors effective September 1, 2015.  Mr. Wild was elected as a Class II director with an initial term to expire at the Annual Meeting of Stockholders in 2017.  Mr. Wild has been appointed to serve on each of the Compensation Committee and the Nominating and Corporate Governance Committee of the Board.  The Board of Directors has determined that Mr. Wild is an independent director as defined by relevant regulations.

Mr. Wild's compensation and terms for his services as a director will be consistent with those of the Company's other non-employee directors, as described in Exhibit 10.46 of the Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on February 8, 2011.  Other than these, no arrangement or understanding exists between Mr. Wild and the Company, or to the Company's knowledge, any other person or persons pursuant to which Mr. Wild was selected as a director.  Mr. Wild is not a party to any transaction with the Company that would require disclosure under Item 404(a) of Regulation S-K.

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.

INDEX TO EXHIBITS