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Institutional Investment Manager
CASTLEARK MANAGEMENT LLC
CASTLEARK MANAGEMENT LLC (CIK: 0001106832), located at 1 N Wacker Dr, Chicago, IL. Institutional holdings reported to the SEC.

Institutional Holdings (2014Q1)
Original 13F HR (0001106832-14-000002) filed in 2014.05.20
#
Name
Shares
Value ($)
%
Options
Notes
151 DEPHEID 106,195 5,478 0.16%
152 ULTRA PETROLEUM CORP 201,080 5,407 0.15%
153 ADEPT TECHNOLOGY INC 282,043 5,359 0.15%
154 INTRALINKS HLDGS INC 520,768 5,327 0.15%
155 UNDER ARMOUR INC 46,300 5,308 0.15%
156 RADIAN GROUP INC 350,779 5,272 0.15%
157 The Ryland Group Inc (Acquired 10/1/15) 131,300 5,243 0.15%
158 LIONBRIDGE TECHNOLOGIES ORD 770,995 5,173 0.15%
159 FISERV INC 89,474 5,072 0.14%
160 CONSTANT CONTACT INC 206,457 5,050 0.14%
161 MARKWEST ENERGY PARTNERS LP 76,730 5,012 0.14%
162 DEL FRISCOS RESTAURANT GROUP COM 177,245 4,944 0.14%
163 NOVADAQ TECHNOLOGIES INC 220,303 4,908 0.14%
164 ENERGEN CORP COM 60,090 4,856 0.14%
165 ANTERO RES CORP 77,350 4,842 0.14%
166 CANADIAN NAT RES LTD 123,750 4,748 0.14%
167 POWERSECURE INTL INC 200,675 4,704 0.13%
168 EMERGENT BIOSOLUTIONS INC 180,225 4,554 0.13%
169 Mueller Industries Inc 602,875 4,510 0.13%
170 GULFPORT ENERGY CORP 62,700 4,463 0.13%
171 MISTRAS GROUP INC 195,505 4,452 0.13%
172 HAWAIIAN HOLDINGS INC COM 318,350 4,444 0.13%
173 LENNAR 111,500 4,418 0.13%
174 Western Gas Equity Partners, L.P. 89,600 4,400 0.13%
175 SUMITOMO MITSUI FINL GROUP I 505,000 4,368 0.12%
176 STATOIL ASA 153,600 4,335 0.12%
177 WESTERN GAS PARTNERS LP 65,380 4,328 0.12%
178 DEPOMED INC 296,354 4,297 0.12%
179 INTUITIVE SURGICAL INC 9,750 4,270 0.12%
180 Xcerra Corp 446,481 3,978 0.11%
181 EQT MIDSTREAM PARTNERS LP 55,980 3,937 0.11%
182 CABOT OIL & GAS CORP 110,100 3,730 0.11%
183 LIVEPERSON INC 308,997 3,730 0.11%
184 CHINA PETROLEUM & CHEMICAL COR ADR SPONSORED 41,660 3,729 0.11%
185 RAMBUS INC DEL 343,377 3,691 0.10%
186 BUCKEYE PARTNERS L P 49,110 3,686 0.10%
187 GOODRICH PETE CORP 229,745 3,635 0.10%
188 Gastar Exploration, Ltd. 659,497 3,607 0.10%
189 ENERGY TRANSFER L P 76,380 3,571 0.10%
190 STERICYCLE INC 30,600 3,477 0.10%
191 UNIT CORP COM 51,490 3,366 0.10%
192 SEMGROUP CORP CL A 51,060 3,354 0.10%
193 PETSMART 47,900 3,301 0.09%
194 TRIMBLE INC 84,800 3,296 0.09%
195 PETROCHINA CO LTD 30,200 3,277 0.09%
196 RENTRAK CORP 54,195 3,267 0.09%
197 WHITING PETE CORP NEW 44,350 3,077 0.09%
198 CHEVRON CORP NEW 25,170 2,993 0.09%
199 OILTANKING PARTNERS LP 38,620 2,978 0.08%
200 TESORO LOGISTICS LP 49,010 2,951 0.08%
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