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)
11,511

Sector Weighting

Basic Materials 7.24%
Capital Goods 9.44%
Conglomerates 0.04%
Consumer Cyclical 7.75%
Consumer/Non-Cyclical 0.51%
Energy 8.46%
Financial 11.93%
Healthcare 13.37%
Services 15.25%
Technology 21.12%
Transportation 4.59%
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
FIDELITY NATIONAL FINANCIAL IN CL A 107,732 5,760 5.65 4,228,109
LKQ CORP COM 105,893 18,926 21.76 4,128,391
CARRIZO OIL & GAS INC COM 104,971 10,834 11.51 3,687,070
HARLEY-DAVIDSON INC COM 104,861 30,249 40.54 1,763,561
HENRY JACK & ASSOC INC COM 104,675 5,382 5.42 2,208,806
COGENT COMM GROUP INC COM NEW 102,910 -3,612 (3.39) 3,565,832
WABCO HLDGS INC COM 95,948 -4,446 (4.43) 1,236,443
WATSCO INC COM 95,818 -4,440 (4.43) 1,085,385
CADENCE DESIGN SYSTEM INC COM 94,708 11,365 13.64 6,486,883
SMITH A O COM 93,911 9,362 11.07 2,356,012
ONYX PHARMACEUTICALS INC COM 92,779 31,860 52.30 983,458
CONTINENTAL RESOURCES INC COM 92,448 9,596 11.58 1,058,729
KAR AUCTION SVCS INC COM 90,736 6,818 8.12 3,758,739
INSULET CORP COM 89,940 -548 (0.61) 3,024,211
WORLD FUEL SVCS CORP COM 86,912 -5,566 (6.02) 2,086,716
ILLUMINA INC COM 86,057 -1,337 (1.53) 1,177,572
DEXCOM INC COM 85,851 -2,367 (2.68) 4,041,943
EAGLE MATERIALS INC COM 84,834 38,287 82.26 1,111,263
CABOT OIL & GAS CORP COM 80,156 7,201 9.87 1,108,970
WEX INC COM 78,626 6,975 9.74 1,082,560

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