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Insider Ownership

Name	Relationship / Title	Current Shares	Trading Activity
atlas venture fund v lp	Beneficial Owner (10% or more)	12,919	View
Date	Type	Shares Traded	Price Range USD
08/03/2005	Disposition (Non Open Market)	1,165,620	n/a
07/05/2005	Disposition (Non Open Market)	1,520,954	n/a
barrett peter	Director	12,919	View
Date	Type	Shares Traded	Price Range USD
08/03/2005	Disposition (Non Open Market)	582,810	n/a
08/03/2005	Acquisition (Non Open Market)	379	n/a
07/05/2005	Disposition (Non Open Market)	760,477	n/a
bishop john e	Officer	38,550	View
Date	Type	Shares Traded	Price Range USD
06/16/2008	Automatic Sell	335	12.89 - 13.51
04/24/2008	Automatic Sell	9,375	13.00
03/17/2008	Automatic Sell	375	9.07 - 9.31
02/22/2008	Acquisition (Non Open Market)	10,800	n/a
12/17/2007	Automatic Sell	1,500	7.18
12/14/2007	Acquisition (Non Open Market)	15,000	n/a
12/15/2006	Acquisition (Non Open Market)	15,000	n/a
07/25/2006	Option Execute	1,500	8.10
07/25/2006	Automatic Sell	1,500	20.00
02/17/2006	Option Execute	21,875	8.10
02/17/2006	Sell	21,875	24.42 - 24.70
brugger stephen b	Officer	263,386	View
Date	Type	Shares Traded	Price Range USD
02/22/2008	Acquisition (Non Open Market)	5,000	n/a
03/07/2006	Acquisition (Non Open Market)	200,000	n/a
02/17/2006	Sell	29,970	24.08 - 25.07
09/06/2005	Option Execute	82,510	0.23 - 0.23
clarke john k	Director	476,836	View
Date	Type	Shares Traded	Price Range USD
07/20/2005	Disposition (Non Open Market)	1,693,450	n/a
07/20/2005	Acquisition (Non Open Market)	7,197	n/a
crane alan l	Director	586,342	View
Date	Type	Shares Traded	Price Range USD
01/10/2007	Automatic Sell	50,000	17.20 - 17.62
12/18/2006	Automatic Sell	62,500	16.00 - 17.00
12/08/2006	Automatic Sell	50,000	17.44 - 17.84
11/16/2006	Automatic Sell	62,500	16.30 - 16.55
11/08/2006	Automatic Sell	50,000	15.01 - 15.45
10/13/2006	Automatic Sell	14,932	15.00
10/12/2006	Automatic Sell	15,300	15.00
10/11/2006	Automatic Sell	10,200	15.00
10/10/2006	Automatic Sell	9,856	15.00
09/17/2006	Disposition (Non Open Market)	200,000	n/a
09/12/2006	Sell	38,174	15.00
09/11/2006	Automatic Sell	50,000	15.00 - 15.11
09/07/2006	Sell	12,402	15.35
09/05/2006	Sell	21,600	15.86 - 15.93
08/31/2006	Sell	33,000	16.40 - 16.50
08/30/2006	Sell	50,000	16.25 - 16.55
08/09/2006	Automatic Sell	29,700	15.01 - 15.43
08/08/2006	Automatic Sell	20,300	15.00 - 16.07
03/07/2006	Acquisition (Non Open Market)	200,000	n/a
02/17/2006	Disposition (Non Open Market)	25,000	n/a
langer robert	Director	970,022	View
Date	Type	Shares Traded	Price Range USD
09/13/2007	Acquisition (Non Open Market)	16,000	n/a
06/03/2005	Disposition (Non Open Market)	21,740	n/a
lisa carron shmerling	Officer	11,250	View
Date	Type	Shares Traded	Price Range USD
02/08/2007	Option Execute	11,250	8.41
02/08/2007	Automatic Sell	11,250	21.00
mvm international life sciences fund no 1 l p	Beneficial Owner (10% or more)	1,610,850	View
Date	Type	Shares Traded	Price Range USD
07/21/2005	Disposition (Non Open Market)	1,073,898	n/a
novartis ag	Beneficial Owner (10% or more)	4,708,679	View
Date	Type	Shares Traded	Price Range USD
07/25/2006	Statement of Ownership	0	n/a
polaris venture management co iii llc	Beneficial Owner (10% or more)	27,497	View
Date	Type	Shares Traded	Price Range USD
06/27/2005	Disposition (Non Open Market)	3,000,000	n/a
06/27/2005	Acquisition (Non Open Market)	1,184	n/a
reeders stephen t	Director	469,848	View
Date	Type	Shares Traded	Price Range USD
03/27/2008	Disposition (Non Open Market)	469,848	n/a
01/10/2007	Disposition (Non Open Market)	430,000	n/a
09/06/2006	Sell	671	15.26
09/06/2006	Sell	463	15.26
08/30/2006	Sell	27,005	16.53
08/29/2006	Sell	165,280	16.50
08/25/2006	Sell	15,803	16.50
03/02/2006	Sell	3,376	24.40
03/02/2006	Sell	7	24.40
02/27/2006	Sell	29,795	24.35
02/27/2006	Sell	66	24.35
07/21/2005	Disposition (Non Open Market)	1,073,898	n/a
sasisekharan ram	Director	409,239	View
Date	Type	Shares Traded	Price Range USD
10/16/2007	Automatic Sell	4,605	12.39 - 12.40
10/15/2007	Automatic Sell	5,395	12.36 - 13.05
09/17/2007	Automatic Sell	10,000	11.15 - 11.20
09/13/2007	Acquisition (Non Open Market)	24,000	n/a
08/15/2007	Automatic Sell	10,000	10.35 - 10.60
07/16/2007	Automatic Sell	10,000	10.40 - 10.50
06/15/2007	Automatic Sell	10,000	12.08 - 12.20
05/15/2007	Automatic Sell	10,000	12.00 - 12.14
04/16/2007	Automatic Sell	10,000	14.54 - 14.88
03/15/2007	Automatic Sell	10,000	12.28 - 12.40
02/15/2007	Automatic Sell	10,000	14.05 - 14.06
01/16/2007	Automatic Sell	10,000	17.57 - 17.75
12/15/2006	Automatic Sell	8,000	16.80 - 17.05
11/15/2006	Automatic Sell	2,000	16.75
11/15/2006	Automatic Sell	10,000	15.91 - 16.24
10/16/2006	Automatic Sell	9,700	14.90 - 19.93
10/16/2006	Automatic Sell	300	15.49 - 15.71
09/15/2006	Automatic Sell	10,000	15.20
08/15/2006	Automatic Sell	10,000	13.80 - 14.15
07/17/2006	Automatic Sell	10,000	11.55 - 11.85
06/15/2006	Automatic Sell	10,000	13.00 - 13.38
05/15/2006	Automatic Sell	10,000	14.50 - 14.58
04/24/2006	Automatic Sell	34,300	16.35 - 16.75
04/21/2006	Automatic Sell	88,600	16.75 - 17.39
04/20/2006	Automatic Sell	77,100	16.75 - 16.92
12/15/2005	Automatic Sell	16,000	25.12 - 25.40
11/15/2005	Automatic Sell	16,000	20.80 - 21.00
10/17/2005	Automatic Sell	16,000	25.93 - 26.24
09/15/2005	Automatic Sell	15,800	26.70 - 27.83
09/15/2005	Automatic Sell	200	27.96
08/15/2005	Automatic Sell	16,000	22.30 - 22.38
07/15/2005	Automatic Sell	16,000	23.00 - 23.85
06/23/2005	Automatic Sell	19,000	20.65
06/16/2005	Automatic Sell	38,000	12.00 - 16.00
06/15/2005	Automatic Sell	16,000	9.78 - 10.17
05/23/2005	Automatic Sell	19,000	10.00 - 10.01
05/16/2005	Automatic Sell	16,000	9.00 - 9.80
05/06/2005	Automatic Sell	9,700	8.65 - 8.66
05/05/2005	Automatic Sell	9,300	8.55 - 8.69
shapiro bennett m	Director	7,000	View
Date	Type	Shares Traded	Price Range USD
01/17/2007	Automatic Sell	9,000	15.00
01/17/2007	Automatic Sell	9,000	17.15 - 17.49
12/18/2006	Automatic Sell	9,000	16.60 - 16.95
11/16/2006	Automatic Sell	9,000	16.60 - 16.73
10/18/2006	Automatic Sell	9,000	15.00 - 15.46
09/20/2006	Automatic Sell	9,000	15.00
08/18/2006	Automatic Sell	9,000	15.00 - 15.16
shea richard p	Officer	27,508	View
Date	Type	Shares Traded	Price Range USD
02/22/2008	Acquisition (Non Open Market)	10,800	n/a
08/15/2007	Acquisition (Non Open Market)	15,000	n/a
venkataraman ganesh	Officer	476,812	View
Date	Type	Shares Traded	Price Range USD
04/15/2008	Acquisition (Non Open Market)	19,000	n/a
02/22/2008	Acquisition (Non Open Market)	5,000	n/a
10/03/2006	Automatic Sell	10,000	13.12 - 13.35
09/13/2006	Sell	33,950	15.00 - 15.42
09/12/2006	Sell	49,771	15.00 - 15.09
09/11/2006	Sell	16,279	15.00 - 15.11
09/01/2006	Automatic Sell	10,000	15.90 - 16.00
08/03/2006	Automatic Sell	2,500	16.93
08/02/2006	Automatic Sell	5,000	17.00 - 17.16
08/01/2006	Automatic Sell	2,500	16.97 - 17.10
07/06/2006	Automatic Sell	10,000	12.65 - 12.87
06/05/2006	Automatic Sell	4,000	13.70
06/01/2006	Automatic Sell	6,000	14.06 - 14.15
05/03/2006	Automatic Sell	30,000	15.60 - 16.08
03/07/2006	Acquisition (Non Open Market)	200,000	n/a
02/22/2006	Disposition (Non Open Market)	67,500	n/a
12/01/2005	Automatic Sell	6,000	21.34 - 22.34
11/01/2005	Automatic Sell	6,000	21.31 - 21.96
10/03/2005	Automatic Sell	6,000	28.70 - 28.86
09/01/2005	Automatic Sell	6,000	25.24 - 25.41
08/01/2005	Automatic Sell	6,000	25.30 - 25.54
07/01/2005	Automatic Sell	6,000	19.61
06/16/2005	Automatic Sell	10,500	17.00
06/01/2005	Automatic Sell	6,000	11.36 - 11.58
05/26/2005	Automatic Sell	10,000	11.00
05/09/2005	Automatic Sell	10,500	9.50 - 9.59
05/04/2005	Automatic Sell	9,600	8.00 - 8.54
05/03/2005	Automatic Sell	4,900	7.66 - 8.07
05/02/2005	Automatic Sell	1,500	7.56 - 7.83
wheeler craig a	Officer	350,000	View
Date	Type	Shares Traded	Price Range USD
02/22/2008	Acquisition (Non Open Market)	75,000	n/a
01/17/2007	Acquisition (Non Open Market)	175,000	n/a
08/22/2006	Acquisition (Non Open Market)	100,000	n/a
whoriskey susan k	Officer	68,831	View
Date	Type	Shares Traded	Price Range USD
04/17/2007	Automatic Sell	6,666	14.91
01/16/2007	Automatic Sell	6,666	16.95
12/19/2006	Automatic Sell	6,666	15.92
11/21/2006	Automatic Sell	6,666	17.46
10/17/2006	Automatic Sell	6,666	15.66
09/19/2006	Automatic Sell	6,666	15.03
05/16/2006	Automatic Sell	5,821	14.50

Stock transaction information provided by EDGAR Online. Momenta Pharmaceuticals, Inc. makes no representation or warranty with respect to any of the information contained herein, takes no responsibility for supplementing, updating or correcting any such information and shall have no liability with respect to any such information. This listing does not include derivatives, such as stock option grants or shares purchased through an employee stock purchase plan. For recent transactions, including derivative transactions, see our Section 16 SEC filings page.