FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person *   Hui Richard 2. Date of Event Requiring Statement (Month/Day/Year) 01/05/2015 3. Issuer Name and Ticker or Trading Symbol CABOT MICROELECTRONICS CORP [CCMP] (Last) (First) (Middle) C/O CABOT MICROELECTRONICS CORPORATION, 870 N. COMMONS DRIVE 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) VP, Global Sales 5. If Amendment, Date Original Filed(Month/Day/Year) (Street) AURORA, IL 60504 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Beneficially Owned

1.Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.			SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Phantom Stock	12/03/2015	12/03/2018(1)	Common Stock	1,688	$ 46.65	D	Â
Phantom Stock	12/03/2015	12/03/2018(2)	Common Stock	624	$ 0	D	Â
Phantom Stock	12/03/2014	12/03/2017(3)	Common Stock	1,074	$ 44.1	D	Â
Phantom Stock	12/03/2014	12/03/2017(4)	Common Stock	396	$ 0	D	Â
Phantom Stock	12/03/2013	12/03/2016(5)	Common Stock	606	$ 32.64	D	Â
Phantom Stock	12/03/2013	12/03/2016(6)	Common Stock	202	$ 0	D	Â
Phantom Stock	12/01/2012	12/01/2015(7)	Common Stock	230	$ 27.94	D	Â
Phantom Stock	12/01/2013	12/01/2016(8)	Common Stock	77	$ 0	D	Â

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Hui Richard C/O CABOT MICROELECTRONICS CORPORATION 870 N. COMMONS DRIVE AURORA, IL 60504	Â	Â	  VP, Global Sales	Â

Signatures

H. Carol Bernstein (Power of Attorney)		01/13/2015
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 5(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	All Restricted Covered Appreciation Rights entitle the holder to earn cash payments equal to the sum of: (1) the number of Covered Company Shares (per Vesting Date) multiplied by the difference between the trading price of one share of common stock ("Stock") of Cabot Microelectronics Corporation (the "Company") and the applicable conversion price. The original vesting schedule for these Covered Company Shares is 25% quarterly per year beginning on the first anniversary of grant date 12/3/14. As soon as reasonably practicable following the applicable Vesting Date, the holder shall receive a cash payment equal to the sum of: (a) the number of vested Covered Company Shares multiplied by (b) the difference (if any) between (i) the closing price of one share of the Company's Stock as reflected on the National Association of Securities Dealers Automated Quotations ("NASDAQ") national stock exchange on the applicable Vesting Date (or if the NASDAQ national stock exchange is closed on the applicable Vesting Date, the first subsequent trading day), and (ii) the applicable conversion price. The reporting person is filing this report on Form 3 for disclosure purposes only.
(2)	All Restricted Covered Units entitle the holder to earn cash payments equal to the number of Restricted Covered Units (per Vesting Date) multiplied by the trading price of one share of Stock of the Company. The original vesting schedule for these Restricted Covered Units is 25% quarterly per year beginning on the first anniversary of grant date 12/3/14. As soon as reasonably practicable following the applicable Vesting Date, the holder shall receive a cash payment equal to the number of vested Restricted Covered Units multiplied by the closing price of one share of the Company's Stock as reflected on the NASDAQ on the applicable Vesting Date (or if the NASDAQ national stock exchange is closed on the applicable Vesting Date, the first subsequent trading day). The reporting person is filing this report on Form 3 for disclosure purposes only.
(3)	The original vesting schedule for these Covered Company Shares is 25% quarterly per year beginning on the first anniversary of grant date 12/3/13.
(4)	The original vesting schedule for these Restricted Covered Units is 25% quarterly per year beginning on the first anniversary of grant date 12/3/13.
(5)	The original vesting schedule for these Covered Company Shares is 25% quarterly per year beginning on the first anniversary of grant date 12/3/12.
(6)	The original vesting schedule for these Restricted Covered Units is 25% quarterly per year beginning on the first anniversary of grant date 12/3/12.
(7)	The original vesting schedule for these Covered Company Shares is 25% quarterly per year beginning on the first anniversary of grant date 12/1/11.
(8)	The original vesting schedule for these Restricted Covered Units is 25% quarterly per year beginning on the first anniversary of grant date 12/1/11.

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