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)
11,281

Sector Weighting

Basic Materials 7.28%
Capital Goods 9.4%
Conglomerates 0.05%
Consumer Cyclical 7.69%
Consumer/Non-Cyclical 0.5%
Energy 8.33%
Financial 11.88%
Healthcare 13.52%
Services 15.41%
Technology 21.04%
Transportation 4.61%
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
RAYMOND JAMES FINANCIAL INC COM 219,716 8,047 3.80 5,200,385
MEDNAX INC COM 211,031 8,694 4.30 2,295,064
UNITED CONTL HLDGS INC COM 198,753 10,074 5.34 5,782,740
MASTEC INC COM 172,642 -14,572 (7.78) 5,465,075
MRC GLOBAL INC COM 159,377 5,850 3.81 4,867,965
SIRONA DENTAL SYSTEMS INC COM 155,072 65,187 72.52 2,246,769
QUANTA SVCS INC COM 153,071 -4,457 (2.83) 5,303,918
WESCO INTL INC COM 148,869 32,023 27.41 2,012,553
B/E AEROSPACE INC COM 142,400 15,005 11.78 2,268,969
COOPER COS INC COM NEW 141,228 -10,928 (7.18) 1,295,191
INTEROIL CORP COM 140,240 -22,592 (13.87) 1,623,147
PALL CORP COM 132,137 5,191 4.09 1,861,606
BELDEN INC COM 131,571 -3,881 (2.87) 2,462,027
F M C CORP COM NEW 129,778 12,944 11.08 2,043,426
COVANCE INC COM 129,488 -29,122 (18.36) 1,688,906
ACTAVIS INC COM 122,107 -32,300 (20.92) 959,738
ALLIANCE DATA SYSTEMS CORP COM 116,909 13,379 12.92 643,665
ALLIED WRLD ASSUR COM HLDG AG SHS 110,816 2,397 2.21 1,248,777
FIDELITY NATIONAL FINANCIAL IN CL A 110,692 5,918 5.65 4,228,109
NII HLDGS INC CL B NEW 106,426 58,080 120.14 13,090,515

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