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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
251 SUPERNUS PHARMACEUTICALS INC 281,091 8,798 0.28%
252 Acxiom Corp 311,220 8,860 0.28%
253 MAGELLAN MIDSTREAM PRTNRS LP 118,092 9,082 0.28%
254 ADVANCED MICRO DEVICES INC 628,550 9,145 0.29%
255 SPECTRANETICS CORP 314,410 9,157 0.29%
256 ALMOST FAMILY INC COM 190,560 9,261 0.29%
257 PIONEER NAT RES CO 49,890 9,291 0.29%
258 MARATHON PETE CORP 188,215 9,512 0.30%
259 LIGHT & WONDER INC COM 404,315 9,562 0.30%
260 ROYAL DUTCH SHELL PLC 184,730 9,741 0.31%
261 WILLIAMS PARTNERS L P NEW 240,900 9,836 0.31%
262 CHESAPEAKE ENERGY CORP 1,656,130 9,837 0.31%
263 MPLX LP 277,858 10,025 0.31%
264 SKECHERS U S A INC 367,550 10,089 0.32%
265 CYRUSONE INC 197,105 10,145 0.32%
266 WESTERN ALLIANCE BANCORP 210,870 10,352 0.32%
267 SPDR SERIES TRUST 286,600 10,670 0.33%
268 DEVRY EDUCATION 301,600 10,692 0.34%
269 JPMORGAN CHASE & CO 122,100 10,725 0.34%
270 TOTAL S A 213,320 10,756 0.34%
271 ITRON INC 177,660 10,784 0.34%
272 HALLIBURTON CO 219,690 10,811 0.34%
273 CHEVRON CORP NEW 101,235 10,870 0.34%
274 FLEETCOR TECHNOLOGIES INC 71,872 10,884 0.34%
275 TESARO INCORPORATED 71,445 10,993 0.34%
276 BIOVERATIV INC 202,510 11,029 0.35%
277 FINANCIAL ENGINES INC 260,968 11,365 0.36%
278 COHERENT INC 55,350 11,382 0.36%
279 BANK AMER CORP 485,800 11,460 0.36%
280 DIAMONDBACK ENERGY INC 112,042 11,620 0.36%
281 EXELIXIS INC 540,570 11,714 0.37%
282 LOUISIANA PAC CORP 490,035 12,163 0.38%
283 BERRY PLASTICS GROUP INC 250,840 12,183 0.38%
284 GREEN DOT CORP CL A 366,945 12,241 0.38%
285 ON SEMICONDUCTOR CORP 808,550 12,524 0.39%
286 BURLINGTON STORES INC 130,625 12,709 0.40%
287 STARBUCKS CORP 218,726 12,771 0.40%
288 CYPRESS SEMICONDUCTOR CORP 946,330 13,022 0.41%
289 LIONS GATE ENTMNT CORP CL A VTG 490,769 13,035 0.41%
290 VONAGE HLDGS CORP 2,066,900 13,063 0.41%
291 INTERXION HOLDING N.V 330,802 13,087 0.41%
292 RINGCENTRAL INC 464,970 13,159 0.41%
293 UNIVERSAL DISPLAY CORP 153,135 13,185 0.41%
294 CHENIERE ENERGY INC 280,040 13,237 0.41%
295 POWERSHARES QQQ TRUST 100,000 13,238 0.41%
296 MERCURY SYS INC COM 339,096 13,242 0.41%
297 BOYD GAMING CORP COM 605,890 13,336 0.42%
298 KENNAMETAL INC 340,000 13,338 0.42%
299 TIMKEN CO COM 298,340 13,485 0.42%
300 SHOPIFY INC 198,670 13,527 0.42%
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