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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1102934	Cabot Microelectronics Corp	CCMP	Semiconductors & Related Devices (3674)	364324765

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1201094	P William Noglows	C/O Cabot Microelectronics Corporation 870 Commons Drive Aurora IL 60504		Yes	No	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Disposition	2016-03-03	56,924	$0.00	28,652	No	4	I	Direct
Common Stock	Acquisiton	2016-03-03	56,924	$0.00	115,873	No	4	I	Indirect	Trust
Common Stock	Disposition	2017-05-12	30,000	$76.56	85,873	No	4	S	Indirect	Trust
Common Stock	Disposition	2017-05-12	2,252	$0.00	30,004	No	4	I	Direct
Common Stock	Acquisiton	2017-05-12	2,252	$0.00	88,125	No	4	I	Indirect	Trust
Common Stock	Disposition	2017-05-15	30,000	$77.37	58,125	No	4	S	Indirect	Trust

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	I	Direct
No	4	I	Indirect	Trust
No	4	S	Indirect	Trust
No	4	I	Direct
No	4	I	Indirect	Trust
No	4	S	Indirect	Trust

Footnotes

Transfer of shares from Mr. Noglows to trust for the benefit of Mrs. M. Noglows, Mr. Noglows' spouse, as to which Mr. Noglows has no investment or voting control.
Represents shares held in trust for the benefit of Mrs. M. Noglows, Mr. Noglows' spouse, as to which Mr. Noglows has no investment or voting control. Accordingly, he is not deemed the beneficial owner of such shares for Section 16 purposes but wishes to continue to report these shares on a voluntary basis.