ESSEX INVESTMENT MANAGEMENT CO LLC Information

125 HIGH STREET, BOSTON, Massachusetts, 02110, (617) 482-4870

Report Date: 03/31/2013

Position Statistics:

Total Positions 391
New Positions 69
Increased Positions 126
Decreased Positions 245
Positions with Activity 371
Sold Out Positions 63
Total Mkt Value
(in $ millions)
588

Sector Weighting

Basic Materials 6.45%
Capital Goods 5.87%
Conglomerates 1.86%
Consumer Cyclical 2.67%
Consumer/Non-Cyclical 2.86%
Energy 8.86%
Financial 11.9%
Healthcare 14.57%
Services 15.37%
Technology 24.76%
Transportation 3.5%
Utilities 1.34%

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

391 Positions as of 03/31/2013

Company Class Value of Shares ($1,000s) Change in Value ($1,000s) Change (%) Shares Held
CELGENE CORP COM 15,515 -592 (3.67) 125,692
GOOGLE INC CL A 14,702 -93 (0.63) 16,530
U S AIRWAYS GROUP INC COM 14,549 -892 (5.78) 811,434
GILEAD SCIENCES INC COM 13,596 6,738 98.25 243,084
EXONE CO COM 10,929 10,929 New 263,916
ANADARKO PETE CORP COM 10,740 9,578 823.91 120,395
ADOBE SYS INC COM 9,094 -186 (2.01) 210,646
DISNEY WALT CO COM DISNEY 8,781 -956 (9.82) 133,921
MORGAN STANLEY COM NEW 8,669 102 1.20 350,962
UNI PIXEL INC COM NEW 8,351 144 1.76 360,284
3-D SYS CORP DEL COM NEW 8,151 8,151 New 175,139
SPLUNK INC COM 7,891 7,477 1,805.83 174,936
EBAY INC COM 7,865 -6,934 (46.85) 144,585
WESTPORT INNOVATIONS INC COM NEW 7,847 4,576 139.94 267,537
QUALCOMM INC COM 7,260 538 8.01 111,296
INTUIT COM 7,077 -487 (6.44) 120,780
ROYAL GOLD INC COM 6,991 967 16.05 135,346
THE ADT CORPORATION COM 6,515 736 12.74 158,246
NEWMONT MINING CORP COM 6,357 552 9.51 198,894
BIOGEN IDEC INC COM 6,310 406 6.88 27,073

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