FORM 4
[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).         
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES
                                                                                  
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

Naman Ananth 		2. Issuer Name and Ticker or Trading Symbol

CABOT MICROELECTRONICS CORP [ CCMP ] 		5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director                      _____ 10% Owner
__ X __ Officer (give title below)      _____ Other (specify below)
VP & Chief Technology Officer
(Last)          (First)          (Middle)

C/O CABOT MICROELECTRONICS CORPORATION, 870 COMMONS DRIVE 		3. Date of Earliest Transaction (MM/DD/YYYY)

3/10/2017
(Street)

AURORA, IL 60504
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
6. Individual or Joint/Group Filing (Check Applicable Line)

_ X _ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3) 		2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. Code
(Instr. 8) 		4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5) 		5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4) 		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Common Stock   3/10/2017     M    906   A $22.13   24682.5959   D    
Common Stock   3/10/2017     S (1)    906   D $69.1574   23776.5959   D    
Common Stock   3/10/2017     M    1687   A $21.45   25463.5959   D    
Common Stock   3/10/2017     S (1)    1687   D $69.1574   23776.5959   D    
Common Stock   3/10/2017     M    5984   A $27.94   29760.5959   D    
Common Stock   3/10/2017     S (1)    5984   D $69.1574   23776.5959   D    
Common Stock   3/10/2017     M    9750   A $32.64   33526.5959   D    
Common Stock   3/10/2017     S (1)    9750   D $69.1574   23776.5959   D    
Common Stock   3/10/2017     M    13350   A $44.10   37126.5959   D    
Common Stock   3/10/2017     S (1)    13350   D $69.1574   23776.5959   D    
Common Stock   3/10/2017     M    8000   A $46.45   31776.5959   D    
Common Stock   3/10/2017     S (1)    8000   D $69.1574   23776.5959   D    
Common Stock   3/10/2017     M    3925   A $42.37   27701.5959   D    
Common Stock   3/10/2017     S (1)    3925   D $69.1574   23776.5959   D    
Common Stock   3/10/2017     S    4338   D $69.1953   19438.5959   D    
Common Stock   3/13/2017     S    1191.0421   D $69.00   18247.5538   D    

Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3) 		2. Conversion or Exercise Price of Derivative Security 3. Trans. Date 3A. Deemed Execution Date, if any 4. Trans. Code
(Instr. 8) 		5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5) 		6. Date Exercisable and Expiration Date 7. Title and Amount of Securities Underlying Derivative Security
(Instr. 3 and 4) 		8. Price of Derivative Security
(Instr. 5) 		9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Stock Options (Right to Buy)   $22.13   3/10/2017     M         906    1/21/2009   (2) 1/21/2018   Common Stock   906   $0   0   D    
Stock Options (Right to Buy)   $21.45   3/10/2017     M         1687    12/1/2010   (3) 12/1/2019   Common Stock   1687   $0   0   D    
Stock Options (Right to Buy)   $27.94   3/10/2017     M         5984    12/1/2012   (4) 12/1/2021   Common Stock   5984   $0   0   D    
Stock Options (Right to Buy)   $32.64   3/10/2017     M         9750    12/3/2013   (5) 12/3/2022   Common Stock   9750   $0   0   D    
Stock Options (Right to Buy)   $44.10   3/10/2017     M         13350    12/3/2014   (6) 12/3/2023   Common Stock   13350   $0   4450   D    
Stock Options (Right to Buy)   $46.45   3/10/2017     M         8000    12/3/2015   (7) 12/3/2024   Common Stock   8000   $0   8000   D    
Stock Options (Right to Buy)   $42.37   3/10/2017     M         3925    12/3/2016   (8) 12/3/2025   Common Stock   3925   $0   11775   D    

Explanation of Responses:
( 1)  Sale to cover exercise price of, and taxes related to, cashless exercise of stock options.
( 2)  With original vesting schedule of 25% quarterly per year beginning on the first anniversary of grant date 1/21/2008.
( 3)  With original vesting schedule of 25% quarterly per year beginning on the first anniversary of grant date 12/1/2009.
( 4)  2011 (FY12) Non-Qualified Stock Option Grant Vesting Schedule: 25% 12/01/2012, 25% 12/01/2013, 25% 12/01/2014, 25% 12/01/2015.
( 5)  2012 (FY13) Non-Qualified Stock Option Grant Vesting Schedule: 25% 12/03/2013, 25% 12/03/2014, 25% 12/03/2015, 25% 12/03/2016.
( 6)  2013 (FY14) Non-Qualified Stock Option Grant Vesting Schedule: 25% 12/03/2014, 25% 12/03/2015, 25% 12/03/2016, 25% 12/03/2017.
( 7)  2014 (FY15) Non-Qualified Stock Option Grant Vesting Schedule: 25% 12/03/2015, 25% 12/03/2016, 25% 12/03/2017, 25% 12/03/2018.
( 8)  2015 (FY16) Non-Qualified Stock Option Grant Vesting Schedule: 25% 12/03/2016, 25% 12/03/2017, 25% 12/03/2018, 25% 12/03/2019.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
Naman Ananth
C/O CABOT MICROELECTRONICS CORPORATION
870 COMMONS DRIVE
AURORA, IL 60504

VP & Chief Technology Officer

Signatures
/s/ H. Carol Bernstein (Power of Attorney) 3/13/2017
** Signature of Reporting Person Date


Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4(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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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