Investment Calculator

MNTA - (NASD) $16.68 + 0.46

Aug 8, 2008 2:53 PM ET

I invested
on

Calculate Current Value and Shares Since: June 22, 2004

Investment Date:	Original Shares:	Original Value:	Current Shares:	Current Value:	Percent Return:
Jun 22, 2004	148	$ 1,000.00	148	$ 2,402.96	140.30%

Investment of $ 1,000.00 on Jun 22, 2004 would yield $ 2,402.96 today

Adjustments

Date	Reason	Factor	Shares	Price	Value	%
Jun 22, 2004	Initial Investment		148	6.75	$1,000.00	0.00%
Aug 7, 2008	Current Investment		148	16.22	$2,402.96	140.30%

The Investment Calculator page and related information is provided by Mergent, a third party service. Momenta Pharmaceuticals, Inc. does not maintain this page and is not responsible for the accuracy, completeness or timeliness of the information. The results are for illustrative purposes only and should not be relied on for investment purposes. The timing and price of dividend reinvestments, taxes, commissions and other factors may affect the values shown. Please note that historical investment performance is not intended to indicate future performance.

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