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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1235010	Momenta Pharmaceuticals Inc	MNTA	Biological Products, (No Disgnostic Substances) (2836)	043561634

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1345695	Bruce Leicher	C/O Momenta Pharmaceuticals, Inc. 675 West Kendall Street Cambridge MA 02142	Svp & General Counsel	No	Yes	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	Acquisiton	2018-02-08	5,381	$0.00	178,380	No	4	M	Direct
Common Stock	Disposition	2018-02-08	1,861	$16.00	176,519	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	M	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Restricted Stock Units	Disposition	2018-02-08	5,381	$0.00	5,381	$0.00

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
16,144			No	4	M	Direct

Footnotes

Shares received pursuant to settlement of Restricted Stock Units that were granted on February 7, 2017.
Includes 480 shares acquired under the issuer's employee stock purchase plan at a purchase price of $14.07 per share on January 31, 2018.
This transaction was effected pursuant to a Rule 10b5-1 trading plan.
Restricted Stock Units convert into common stock on a one-for-one basis.
Subject to certain criteria, the restricted stock units will vest with respect to 25% of the shares on the first anniversary of the grant date, and the remainder will vest in equal quarterly installments over the subsequent three years.