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FRONTIER CAPITAL MANAGEMENT CO LLC Information

99 SUMMER STREET, BOSTON, Massachusetts, 02110,

Report Date: 03/31/2013

Position Statistics:

Total Positions 342
New Positions 29
Increased Positions 180
Decreased Positions 162
Positions with Activity 342
Sold Out Positions 27
Total Mkt Value
(in $ millions)		 11,491

Sector Weighting

Basic Materials 7.23%
Capital Goods 9.41%
Conglomerates 0.05%
Consumer Cyclical 7.75%
Consumer/Non-Cyclical 0.51%
Energy 8.32%
Financial 11.95%
Healthcare 13.41%
Services 15.23%
Technology 21.18%
Transportation 4.67%
Utilities 0.3%

Institutional Holdings information is filed by major institutions on form 13-F with the Securities and Exchange Commission.

342 Positions as of 03/31/2013

Company Class Value of Shares ($1,000s) Change in Value ($1,000s) Change (%) Shares Held
TEVA PHARMACEUTICAL INDS LTD ADR 3,805 -205 (5.11) 94,580
AMERESCO INC CL A 3,029 -2,516 (45.38) 373,468
AMPHENOL CORP NEW CL A 69,558 26,994 63.42 835,128
BROADCOM CORP CL A 4,302 623 16.94 114,570
COGNIZANT TECHNOLOGY SOLUTIONS CL A 4,145 563 15.73 63,280
FIDELITY NATIONAL FINANCIAL IN CL A 108,070 5,778 5.65 4,228,109
GOOGLE INC CL A 7,035 727 11.53 7,738
GREEN DOT CORP CL A 10,328 -4,709 (31.32) 558,900
HEALTH MGMT ASSOC INC NEW CL A -9,570 Sold Out 0
HUB GROUP INC CL A 65,284 -2,485 (3.67) 1,671,365
IHS INC CL A 43,451 4,041 10.25 416,040
INGRAM MICRO INC CL A 37,727 -92 (0.24) 2,039,295
INTERNATIONAL SPEEDWAY CORP CL A 3,211 -3,331 (50.92) 93,017
KIOR INC CL A 18,725 3,968 26.89 4,035,508
NEUSTAR INC CL A -39,263 Sold Out 0
PBF ENERGY INC CL A 2,019 2,019 New 64,390
TILLYS INC CL A 14,072 -413 (2.85) 850,242
VERISK ANALYTICS INC CL A 38,525 -4 (0.01) 634,476
WADDELL & REED FINL INC CL A 76,247 -3,734 (4.67) 1,606,548
BROWN FORMAN CORP CL B 42,994 6,657 18.32 589,934