Insider Trading activities at A123 Systems, Inc. (AONE)

Insider trading activities (stock purchases, sales, and option exercises) reported by insiders of A123 Systems, Inc. (AONE) since 2010 are shown in Table 1 and Table 2. Table 1 shows the monthly insider trading data of A123 Systems, Inc.. Table 2 shows the detailed insider transactions. This company's CIK number is 1167178.

Total stock buying since 2010: $0.
Total stock sales since 2010: $4,294,453.
Total stock option exercises since 2010: $153,600.

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8 insiders reported insider trading activities at A123 Systems, Inc. (AONE):
▪ Insider trading activities of Mccarthy Jeffrey P
▪ Insider trading activities of Forcier Jason
▪ Insider trading activities of Vieau David P
▪ Insider trading activities of Cole Andrew
▪ Insider trading activities of Riley Jr. Gilbert N
▪ Insider trading activities of Johnson Robert Joseph
▪ Insider trading activities of Rubino Mike
▪ Insider trading activities of Pyenson Eric J.

Table 1. Yearly summary of insider stock purchases, sales, and option exercises at *A123 Systems, Inc.* (*AONE*).
	Insider Buying		Insider Sales		Option Exercises
Year	Shares	Value	Shares	Value	Shares	Value
2012	0	$0	9,136,668	$2,297,042	0	$0
2011	0	$0	277,449	$1,280,788	20,000	$136,800
2010	0	$0	80,000	$716,623	80,000	$16,800

Table 2. Monthly summary of insider trading at *A123 Systems, Inc.* (*AONE*).
Trading Period	Insider Buying		Insider Sales		Option Exercises
year-month	Shares	Value	Shares	Value	Shares	Value
2012-12	0	$0	20,000	$1,620	0	$0
2012-11	0	$0	27,893	$3,461	0	$0
2012-10	0	$0	20,000	$5,060	0	$0
2012-09	0	$0	5,950,108	$1,254,252	0	$0
2012-08	0	$0	2,956,453	$791,870	0	$0
2012-07	0	$0	20,000	$24,560	0	$0
2012-06	0	$0	20,000	$18,940	0	$0
2012-05	0	$0	38,503	$36,776	0	$0
2012-04	0	$0	20,000	$21,820	0	$0
2012-03	0	$0	20,000	$40,260	0	$0
2012-02	0	$0	23,711	$51,783	0	$0
2012-01	0	$0	20,000	$46,640	0	$0
2011-12	0	$0	30,000	$70,500	0	$0
2011-11	0	$0	34,944	$110,784	0	$0
2011-10	0	$0	41,111	$135,807	0	$0
2011-09	0	$0	41,111	$189,533	0	$0
2011-08	0	$0	16,059	$69,158	0	$0
2011-07	0	$0	41,111	$219,752	0	$0
2011-06	0	$0	11,111	$57,588	0	$0
2011-05	0	$0	30,891	$176,078	0	$0
2011-04	0	$0	11,111	$59,088	0	$0
2011-02	0	$0	20,000	$192,500	20,000	$136,800
2010-12	0	$0	10,000	$90,810	10,000	$2,100
2010-11	0	$0	10,000	$94,700	10,000	$2,100

Table 3. Detailed insider trading at *A123 Systems, Inc.* (*AONE*)
Trade Date	Insider Name	Trade Type	Shares	Price ($)	Value ($)
2012-12-03	Riley Jr. Gilbert N (CTO and VP of Res. and Dev.)	Sale	20,000	.08	1,620
2012-11-20	Pyenson Eric J. (VP and General Counsel)	Sale	1,563	.09	140
2012-11-20	Forcier Jason (VP, Auto Solutions)	Sale	1,550	.09	139
2012-11-20	Johnson Robert Joseph (VP and GM, Energy Sol'ns Group)	Sale	1,563	.09	140
2012-11-19	Pyenson Eric J. (VP and General Counsel)	Sale	1,237	.09	108
2012-11-19	Forcier Jason (VP, Auto Solutions)	Sale	743	.09	66
2012-11-19	Johnson Robert Joseph (VP and GM, Energy Sol'ns Group)	Sale	1,237	.09	108
2012-11-01	Riley Jr. Gilbert N (CTO and VP of Res. and Dev.)	Sale	20,000	.14	2,760
2012-10-01	Riley Jr. Gilbert N (CTO and VP of Res. and Dev.)	Sale	20,000	.25	5,060
2012-09-10	Mccarthy Jeffrey P (Director)	Sale	1,429,544	.22	314,499
2012-09-07	Mccarthy Jeffrey P (Director)	Sale	2,000,000	.20	396,000
2012-09-06	Mccarthy Jeffrey P (Director)	Sale	1,250,564	.20	252,613
2012-09-05	Mccarthy Jeffrey P (Director)	Sale	1,000,000	.22	221,000
2012-09-04	Mccarthy Jeffrey P (Director)	Sale	250,000	.26	65,000
2012-09-04	Riley Jr. Gilbert N (CTO and VP of Res. and Dev.)	Sale	20,000	.26	5,140
2012-08-31	Mccarthy Jeffrey P (Director)	Sale	496,522	.26	129,095
2012-08-30	Mccarthy Jeffrey P (Director)	Sale	1,700,000	.26	443,700
2012-08-29	Mccarthy Jeffrey P (Director)	Sale	732,989	.28	206,702
2012-08-20	Pyenson Eric J. (Vice Pres. and General Counsel)	Sale	2,798	.46	1,287
2012-08-20	Forcier Jason (VP, Auto Solutions)	Sale	1,346	.46	619
2012-08-20	Johnson Robert Joseph (VP and GM, Energy Sol'ns Group)	Sale	2,798	.46	1,287
2012-08-01	Riley Jr. Gilbert N (CTO and VP of Res. And Dev.)	Sale	20,000	.46	9,180
2012-07-02	Riley Jr. Gilbert N (CTO and VP of Res. And Dev.)	Sale	20,000	1.23	24,560
2012-06-01	Riley Jr. Gilbert N (CTO and VP of Res. And Dev.)	Sale	20,000	.95	18,940
2012-05-21	Pyenson Eric J. (Vice Pres. & General Counsel)	Sale	6,250	.84	5,268
2012-05-21	Forcier Jason (VP, Auto Solutions)	Sale	3,531	.86	3,026
2012-05-21	Johnson Robert Joseph (VP & GM, Energy Sol'ns Group)	Sale	6,250	.84	5,268
2012-05-18	Pyenson Eric J. (Vice Pres. & General Counsel)	Sale	1,236	.88	1,087
2012-05-18	Johnson Robert Joseph (VP & GM, Energy Sol'ns Group)	Sale	1,236	.88	1,087
2012-05-01	Riley Jr. Gilbert N (CTO and VP of Res. and Dev.)	Sale	20,000	1.05	21,040
2012-04-02	Riley Jr. Gilbert N (CTO & VP of Res. & Dev.)	Sale	20,000	1.09	21,820
2012-03-01	Riley Jr. Gilbert N (CTO and VP of Res. and Dev.)	Sale	20,000	2.01	40,260
2012-02-21	Pyenson Eric J. (VP and General Counsel)	Sale	1,237	2.20	2,721
2012-02-21	Forcier Jason (VP Auto Solutions)	Sale	1,237	2.20	2,721
2012-02-21	Johnson Robert Joseph (VP and GM, Energy Sol'ns Group)	Sale	1,237	2.20	2,721
2012-02-01	Riley Jr. Gilbert N (CTO and VP of Res. and Dev.)	Sale	20,000	2.18	43,620
2012-01-23	Riley Jr. Gilbert N (CTO and VP of Res. And Dev.)	Sale	20,000	2.33	46,640
2011-12-01	Riley Jr. Gilbert N (CTO and VP or Res. And Dev.)	Sale	30,000	2.35	70,500
2011-11-18	Pyenson Eric J. (VP and General Counsel)	Sale	1,236	2.42	2,991
2011-11-18	Cole Andrew (VP of HR and Organiz. Develop.)	Sale	1,236	2.42	2,991
2011-11-18	Forcier Jason (VP, Automotive Group)	Sale	1,236	2.42	2,991
2011-11-18	Johnson Robert Joseph (VP and GM, Energy Sol'ns Group)	Sale	1,236	2.42	2,991
2011-11-01	Riley Jr. Gilbert N (CTO & VP of Res. & Dev.)	Sale	30,000	3.29	98,820
2011-10-11	Vieau David P (Chief Executive Officer)	Sale	11,111	3.28	36,477
2011-10-03	Riley Jr. Gilbert N (CTO & VP of Res. & Dev.)	Sale	30,000	3.31	99,330
2011-09-09	Vieau David P (Chief Executive Officer)	Sale	11,111	4.58	50,843
2011-09-01	Riley Jr. Gilbert N (CTO and VP or Res. And Dev.)	Sale	30,000	4.62	138,690
2011-08-18	Pyenson Eric J. (VP and General Counsel)	Sale	1,237	4.00	4,948
2011-08-18	Cole Andrew (VP of HR & Organiz. Develop.)	Sale	1,237	4.00	4,948
2011-08-18	Forcier Jason (VP, Automotive Group)	Sale	1,237	4.00	4,948
2011-08-18	Johnson Robert Joseph (VP & GM, Energy Sol'ns Group)	Sale	1,237	4.00	4,948
2011-08-11	Vieau David P (Chief Executive Officer)	Sale	11,111	4.44	49,366
2011-07-13	Vieau David P (Chief Executive Officer)	Sale	11,111	5.35	59,432
2011-07-01	Riley Jr. Gilbert N (CTO and VP of Res. And Dev.)	Sale	30,000	5.34	160,320
2011-06-14	Vieau David P (Chief Executive Officer)	Sale	11,111	5.18	57,588
2011-05-23	Cole Andrew (VP of HR and Organiz. Develop.)	Sale	4,945	5.53	27,321
2011-05-23	Forcier Jason (VP, Automotive Group)	Sale	4,945	5.53	27,321
2011-05-23	Johnson Robert Joseph (VP and GM, Energy Sol'ns Group)	Sale	4,945	5.53	27,321
2011-05-18	Pyenson Eric J. (V.P. & General Counsel)	Sale	4,945	5.92	29,294
2011-05-16	Vieau David P (Chief Executive Officer)	Sale	11,111	5.83	64,821
2011-04-12	Vieau David P (Cheif Executive Officer)	Sale	11,111	5.32	59,088
2011-02-25	Johnson Robert Joseph (VP and GM, Energy Sol'ns Group)	Sale	20,000	9.62	192,500
2011-02-25	Johnson Robert Joseph (VP and GM, Energy Sol'ns Group)	Option Ex	20,000	6.84	136,800
2010-12-21	Rubino Mike (Chief Financial Officer)	Sale	5,000	9.38	46,890
2010-12-21	Rubino Mike (Chief Financial Officer)	Option Ex	5,000	.21	1,050
2010-12-07	Rubino Mike (Chief Financial Officer)	Sale	5,000	8.78	43,920
2010-12-07	Rubino Mike (Chief Financial Officer)	Option Ex	5,000	.21	1,050
2010-11-22	Rubino Mike (Chief Financial Officer)	Sale	5,000	9.08	45,380
2010-11-22	Rubino Mike (Chief Financial Officer)	Option Ex	5,000	.21	1,050
2010-11-08	Rubino Mike (Chief Financial Officer)	Sale	5,000	9.86	49,320
2010-11-08	Rubino Mike (Chief Financial Officer)	Option Ex	5,000	.21	1,050
2010-10-21	Rubino Mike (Chief Financial Officer)	Sale	5,000	9.15	45,759
2010-10-21	Rubino Mike (Chief Financial Officer)	Option Ex	5,000	.21	1,050
2010-10-07	Rubino Mike (Chief Financial Officer)	Sale	5,000	8.68	43,400
2010-10-07	Rubino Mike (Chief Financial Officer)	Option Ex	5,000	.21	1,050
2010-09-21	Rubino Mike (Chief Financial Officer)	Sale	5,000	9.46	47,275
2010-09-21	Rubino Mike (Chief Financial Officer)	Option Ex	5,000	.21	1,050
2010-09-07	Rubino Mike (Chief Financial Officer)	Sale	5,000	7.76	38,815
2010-09-07	Rubino Mike (Chief Financial Officer)	Option Ex	5,000	.21	1,050
2010-08-23	Rubino Mike (Chief Financial Officer)	Sale	5,000	6.82	34,120
2010-08-23	Rubino Mike (Chief Financial Officer)	Option Ex	5,000	.21	1,050
2010-08-09	Rubino Mike (Chief Financial Officer)	Sale	5,000	10.84	54,185
2010-08-09	Rubino Mike (Chief Financial Officer)	Option Ex	5,000	.21	1,050
2010-07-21	Rubino Mike (Chief Financial Officer)	Sale	5,000	8.90	44,500
2010-07-21	Rubino Mike (Chief Financial Officer)	Option Ex	5,000	.21	1,050
2010-07-07	Rubino Mike (Chief Financial Officer)	Sale	5,000	8.38	41,875
2010-07-07	Rubino Mike (Chief Financial Officer)	Option Ex	5,000	.21	1,050
2010-06-21	Rubino Mike (Chief Financial Officer)	Sale	5,000	8.77	43,830
2010-06-21	Rubino Mike (Chief Financial Officer)	Option Ex	5,000	.21	1,050
2010-06-07	Rubino Mike (Chief Financial Officer)	Sale	5,000	8.60	43,000
2010-06-07	Rubino Mike (Chief Financial Officer)	Option Ex	5,000	.21	1,050
2010-05-21	Rubino Mike (Chief Financial Officer)	Sale	5,000	9.23	46,144
2010-05-21	Rubino Mike (Chief Financial Officer)	Option Ex	5,000	.21	1,050
2010-05-07	Rubino Mike (Chief Financial Officer)	Sale	5,000	9.64	48,210
2010-05-07	Rubino Mike (Chief Financial Officer)	Option Ex	5,000	.21	1,050

Insider trading activities including stock purchases, stock sales, and option exercises of AONE listed in the above tables cannot be completely guaranteed as to their accuracy. For more insider trading information of A123 Systems, Inc. (symbol AONE, CIK number 1167178) see the Securities and Exchange Commission (SEC) website.

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