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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 ACCESS MIDSTREAM PARTNERS LP 100,700 5,795 0.16%
152 AMAZON COM INC 101,000 33,973 0.97%
153 SCHLUMBERGER LTD 105,980 10,333 0.29%
154 DEPHEID 106,195 5,478 0.16%
155 MARATHON PETE CORP 106,200 9,244 0.26%
156 ISHARES TR 106,600 7,164 0.20%
157 ILLUMINA INC 108,900 16,189 0.46%
158 CABOT OIL & GAS CORP 110,100 3,730 0.11%
159 LENNAR 111,500 4,418 0.13%
160 WAGEWORKS INC COM 111,765 6,271 0.18%
161 PHILLIPS 66 111,900 8,623 0.25%
162 G-III APPAREL GROUP LTD 112,494 8,052 0.23%
163 SPECTRUM BRANDS HLDGS INC 119,081 9,491 0.27%
164 SOLERA HOLDINGS INC 123,023 7,792 0.22%
165 CANADIAN NAT RES LTD 123,750 4,748 0.14%
166 The Ryland Group Inc (Acquired 10/1/15) 131,300 5,243 0.15%
167 FIESTA RESTAURANT GROUP INC COM 131,820 6,010 0.17%
168 BIOGEN INC 134,770 41,222 1.17%
169 EXXON MOBIL CORP 136,600 13,343 0.38%
170 HALLIBURTON CO 137,880 8,120 0.23%
171 PALO ALTO NETWORKS INC 138,715 9,516 0.27%
172 VALERO ENERGY CORP NEW 142,840 7,585 0.22%
173 ROYAL DUTCH SHELL PLC 147,120 10,749 0.31%
174 LEGG MASON INC 147,298 7,223 0.21%
175 MAGELLAN MIDSTREAM PRTNRS LP 147,480 10,285 0.29%
176 JACK IN THE BOX INC 150,925 8,896 0.25%
177 STATOIL ASA 153,600 4,335 0.12%
178 BAKER HUGHES INC 157,130 10,217 0.29%
179 Intuit Inc 161,460 29,860 0.85%
180 ENERGY TRANSFER PRTNRS L P 163,360 8,787 0.25%
181 ASPEN TECHNOLOGY COM USD0.10 173,300 7,341 0.21%
182 SUNPOWER CORP 173,763 5,606 0.16%
183 TEREX CORP NEW 173,980 7,707 0.22%
184 DEL FRISCOS RESTAURANT GROUP COM 177,245 4,944 0.14%
185 ANI PHARMACEUTICALS INC 179,295 5,621 0.16%
186 EMERGENT BIOSOLUTIONS INC 180,225 4,554 0.13%
187 ACADIA COMPANY COM 183,311 8,271 0.24%
188 TOLL BROTHERS INC 186,200 6,685 0.19%
189 CANCER GENETICS 186,410 2,813 0.08%
190 LOGMEIN INC 189,360 8,500 0.24%
191 PLAINS ALL AMERN PIPELINE L 193,570 10,670 0.30%
192 TOTAL S A 194,100 12,733 0.36%
193 MISTRAS GROUP INC 195,505 4,452 0.13%
194 CHENIERE ENERGY INC 197,100 10,909 0.31%
195 CARRIZO OIL & GAS INC 197,760 10,572 0.30%
196 INSULET CORPORATION 198,004 9,389 0.27%
197 POWERSECURE INTL INC 200,675 4,704 0.13%
198 ULTRA PETROLEUM CORP 201,080 5,407 0.15%
199 HEXCEL CORP NEW COM 201,309 8,765 0.25%
200 ALTRA INDL MOTION CORP COM 201,883 7,207 0.20%
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