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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
201 MOOG INC CL A 26,330 1,773 0.06%
202 MORGAN STANLEY 816,420 34,975 1.10%
203 MPLX LP 277,858 10,025 0.31%
204 MSC INDL DIRECT INC 45,290 4,654 0.15%
205 MURPHY OIL 290 8 0.00%
206 MURPHY USA INC COM 70 5 0.00%
207 MYRIAD GENETICS INC 22,760 437 0.01%
208 NABORS INDUSTRIES LTD 22,400 293 0.01%
209 NEKTAR THERAPEUTICS COM 306,760 7,200 0.23%
210 NETFLIX INC 147,035 21,733 0.68%
211 NEVRO CORP COM 160,655 15,053 0.47%
212 NEW ORIENTAL ED & TECH GRP I 2,100 127 0.00%
213 NEWFIELD EXPL CO 7,300 269 0.01%
214 NEXSTAR MEDIA GROUP INC 207,750 14,574 0.46%
215 NIKE INC 2,000 111 0.00%
216 NOBLE MIDSTREAM PARTNERS LP 42,184 2,197 0.07%
217 NUSTAR ENERGY LP 23,240 1,208 0.04%
218 NUTRI SYS INC NEW 91,980 5,105 0.16%
219 NUVASIVE INC 188,035 14,042 0.44%
220 NXP SEMICONDUCTORS N V 2,950 305 0.01%
221 Nice Systems LTD Sponsored 4,035 274 0.01%
222 OLD DOMINION FREIGHT LINE IN 159,385 13,639 0.43%
223 ON SEMICONDUCTOR CORP 808,550 12,524 0.39%
224 ONEOK PARTNERS LP 95,320 5,146 0.16%
225 OSHKOSH CORP 110,150 7,555 0.24%
226 OWENS CORNING NEW 55,860 3,428 0.11%
227 PACCAR INC 4,550 306 0.01%
228 PALO ALTO NETWORKS INC 212,235 23,915 0.75%
229 PANERA BREAD CO 140,209 36,717 1.15%
230 PARKER HANNIFIN CORP 171,311 27,465 0.86%
231 PARSLEY ENERGY CLA A 20,600 670 0.02%
232 PAYCHEX INC 14,740 868 0.03%
233 PDC ENERGY INC 11,000 686 0.02%
234 PDF SOLUTIONS INC COM 242,939 5,495 0.17%
235 PEPSICO INC 1,600 179 0.01%
236 PERKINELMER INC 56,060 3,255 0.10%
237 PERRIGO CO PLC 380 25 0.00%
238 PETROCHINA CO LTD 24,240 1,776 0.06%
239 PFIZER INC 6,500 222 0.01%
240 PHILLIPS 66 12,630 1,001 0.03%
241 PHILLIPS 66 PARTNERS LP 55,399 2,845 0.09%
242 PINNACLE FOODS INC DEL 81,270 4,703 0.15%
243 PIONEER NAT RES CO 49,890 9,291 0.29%
244 PLAINS ALL AMERN PIPELINE L 156,730 4,954 0.16%
245 PLAINS GP HLDGS L P 47,721 1,492 0.05%
246 PNC FINL SVCS GROUP INC 70,600 8,489 0.27%
247 PORTOLA PHARMACEUTICALS INC 77,175 3,024 0.09%
248 POWERSHARES QQQ TRUST 100,000 13,238 0.41%
249 PRA GROUP INC 31,710 1,051 0.03%
250 PRA HEALTH SCIENCES INC 249,995 16,307 0.51%
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