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Institutional Investment Manager
ESSEX INVESTMENT MANAGEMENT CO LLC
ESSEX INVESTMENT MANAGEMENT CO LLC (CIK: 0000201772) incorporated in Delaware, located at 125 High Street, Boston, MA. Institutional holdings reported to the SEC.

Institutional Holdings (2015Q1)
Portfolio Summary: 316 holdings with a total value of $714,665,000.
#
Name
Shares
Value ($)
%
Options
Notes
101 IPG PHOTONICS CORP 18,106 1,678,000 0.23%
102 SIGMA DESIGNS INC COM 200,950 1,614,000 0.23%
103 HANNON ARMSTRONG SUST INFR C 85,224 1,558,000 0.22%
104 KORN FERRY COM NEW 46,908 1,542,000 0.22%
105 MATSON INC COM 36,470 1,538,000 0.22%
106 TEVA PHARMACEUTICAL INDS LTD 24,422 1,521,000 0.21%
107 HEADWATERS INC COM 81,344 1,492,000 0.21%
108 LOGMEIN INC 26,432 1,480,000 0.21%
109 MCKESSON CORP 6,452 1,459,000 0.20%
110 Callidus Software Inc 114,581 1,453,000 0.20%
111 BRIGHT HORIZONS FAM SOL IN DEL COM 28,269 1,449,000 0.20%
112 KNOLL INC 60,783 1,424,000 0.20%
113 Market Vector Junior 62,426 1,417,000 0.20%
114 TABLEAU SOFTWARE INC 15,198 1,406,000 0.20%
115 HAIN CELESTIAL GROUP INC 21,865 1,400,000 0.20%
116 CAVCO INDS INC DEL 18,214 1,367,000 0.19%
117 MANHATTAN ASSOCIATES INC 26,913 1,362,000 0.19%
118 U S CONCRETE INC 40,119 1,359,000 0.19%
119 XPO LOGISTICS INC 29,858 1,358,000 0.19%
120 STEWART INFORMATION SVCS COR 32,118 1,305,000 0.18%
121 SPLUNK INC 21,971 1,301,000 0.18%
122 INTRALINKS HLDGS INC 124,220 1,284,000 0.18%
123 BOISE CASCADE CO DEL COM 33,208 1,244,000 0.17%
124 Albany Molecular 70,428 1,240,000 0.17%
125 ROCKWELL MED INC 113,313 1,239,000 0.17%
126 FRESH MKT INC 29,949 1,217,000 0.17%
127 AUTOBYTEL INC COM NEW 82,048 1,212,000 0.17%
128 DEXCOM INC 19,118 1,192,000 0.17%
129 Invacare Corp 28,841 1,188,000 0.17%
130 Alon USA Energy, Inc. 71,465 1,184,000 0.17%
131 JOHNSON CTLS INTL PLC 23,241 1,172,000 0.16%
132 EVERCORE PARTNERS INC 22,545 1,165,000 0.16%
133 QUALYS INC 25,000 1,162,000 0.16%
134 GIGAMON INC 54,678 1,161,000 0.16%
135 COVENANT TRANSN GROUP INC CL A 34,554 1,146,000 0.16%
136 STAGE STORES INC 49,803 1,141,000 0.16%
137 SUPERNUS PHARMACEUTICALS INC 93,981 1,136,000 0.16%
138 CRA INTL INC COM 36,421 1,133,000 0.16%
139 PFSWEB INC COM STK 102,878 1,131,000 0.16%
140 BADGER METER INC COM 18,822 1,128,000 0.16%
141 MATADOR RES CO 51,260 1,124,000 0.16%
142 BIG LOTS INC 23,145 1,112,000 0.16%
143 CONSTANT CONTACT INC 28,804 1,101,000 0.15%
144 JAZZ PHARMACEUTICALS PLC 6,356 1,098,000 0.15%
145 ALEXION PHARMACEUTIC 6,322 1,096,000 0.15%
146 TOWER SEMICONDUCTOR LTD 64,522 1,096,000 0.15%
147 VIVINT SOLAR INC 89,868 1,091,000 0.15%
148 SYNERGETICS USA INC 201,565 1,086,000 0.15%
149 CHEROKEE INC DEL NEW 54,553 1,063,000 0.15%
150 AEGEAN MARINE PETROLEUM NETW 73,824 1,061,000 0.15%
Page 3 of 7

Portfolio data is normalized using SEC Form 13F filings, including the Original 13F-HR (0001172661-15-000983, filed 2015.05.06).

From 2023-01-03 onward, the SEC requires values to be reported in nearest dollars. Earlier filings reported values in thousands; therefore, positions shown as $0 in older filings may represent actual values between $0–$999.