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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 (2017Q1)
Original 13F HR (0001106832-17-000003) filed in 2017.05.15
#
Name
Shares
Value ($)
%
Options
Notes
151 FIVE9 INC 429,124 7,063 0.22%
152 XPERI CORP 205,260 6,969 0.22%
153 APACHE CORP 134,760 6,925 0.22%
154 CBOE HLDGS INC 85,245 6,911 0.22%
155 CLOVIS ONCOLOGY INC 106,665 6,791 0.21%
156 INTEGRA LIFESCIENCES HLDGS CP COM NEW 161,053 6,785 0.21%
157 CONCHO RESOURCES 52,600 6,751 0.21%
158 CALLON PETE CO DEL 505,910 6,658 0.21%
159 WASTE CONNECTIONS INC 74,900 6,608 0.21%
160 BAKER HUGHES INC 106,390 6,364 0.20%
161 ENCANA CORP 541,235 6,338 0.20%
162 PROASSURANCE CORP. 261,065 6,315 0.20%
163 DIGITALGLOBE INC 189,855 6,218 0.19%
164 HOLOGIC INC 144,610 6,153 0.19%
165 AZENTA INC COM 274,565 6,150 0.19%
166 DERMIRA INC COM 179,616 6,127 0.19%
167 FISERV INC 52,694 6,076 0.19%
168 ACI WORLDWIDE INC 283,810 6,071 0.19%
169 WESTERN GAS PARTNERS LP 96,381 5,826 0.18%
170 SENSIENT TECHNOLOGIES CORP 72,375 5,736 0.18%
171 WEBSTER FINL CORP CONN 114,385 5,724 0.18%
172 TRUECAR INC 364,035 5,632 0.18%
173 CELANESE CORP DEL 62,685 5,632 0.18%
174 REALPAGE INC COM 160,628 5,606 0.18%
175 ISHARES TR 200,000 5,566 0.17%
176 SCHLUMBERGER LTD 70,841 5,533 0.17%
177 PDF SOLUTIONS INC COM 242,939 5,495 0.17%
178 FMC 78,440 5,459 0.17%
179 INTUITIVE SURGICAL INC 7,100 5,442 0.17%
180 GALLAGHER ARTHUR J & CO 93,610 5,293 0.17%
181 ANADARKO PETE CORP 83,940 5,204 0.16%
182 ENI S P A 157,840 5,166 0.16%
183 ALLISON TRANSMISSION HLDGS INC COM 143,105 5,160 0.16%
184 ONEOK PARTNERS LP 95,320 5,146 0.16%
185 TRANSUNION 134,090 5,142 0.16%
186 NUTRI SYS INC NEW 91,980 5,105 0.16%
187 KEANE GROUP INC 356,540 5,099 0.16%
188 SMART SAND INC COM 313,679 5,097 0.16%
189 RESTAURANT BRANDS INTL INC 91,145 5,080 0.16%
190 ENERGEN CORP COM 91,650 4,989 0.16%
191 VALERO ENERGY CORP NEW 75,180 4,984 0.16%
192 FIRST DATA CORP NEW 320,410 4,966 0.16%
193 MIMECAST LTD 221,455 4,958 0.16%
194 PLAINS ALL AMERN PIPELINE L 156,730 4,954 0.16%
195 LINCOLN ELEC HLDGS INC 56,570 4,914 0.15%
196 F5 NETWORKS INC 33,850 4,826 0.15%
197 CDW CORP 83,270 4,806 0.15%
198 TELEFLEX INC 24,670 4,779 0.15%
199 VAIL RESORTS INC 24,810 4,761 0.15%
200 PINNACLE FOODS INC DEL 81,270 4,703 0.15%
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