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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 (2016Q2)
Portfolio Summary: 373 holdings with a total value of $3,135,064,000.
#
Name
Shares
Value ($)
%
Options
Notes
201 SPECTRANETICS CORP 251,445 4,705,000 0.15%
202 SEALED AIR CORP NEW 103,273 4,747,000 0.15%
203 ARAMARK 143,367 4,791,000 0.15%
204 LKQ CORP 155,759 4,938,000 0.16%
205 NEVRO CORP COM 68,875 5,080,000 0.16%
206 SPECTRUM BRANDS HLDGS INC 42,670 5,091,000 0.16%
207 CONOCOPHILLIPS 119,060 5,191,000 0.17%
208 LENDINGTREE INC NEW COM 58,825 5,196,000 0.17%
209 GLOBAL PMTS INC 72,952 5,207,000 0.17%
210 CABOT OIL & GAS CORP 206,770 5,322,000 0.17%
211 WASTE CONNECTIONS INC 74,910 5,397,000 0.17%
212 FIVE9 INC 461,084 5,487,000 0.18%
213 TRIMBLE INC 225,605 5,496,000 0.18%
214 ULTIMATE SOFTWARE GROUP INCORPORATED 26,206 5,511,000 0.18%
215 INTUITIVE SURGICAL INC 8,350 5,523,000 0.18%
216 WAGEWORKS INC COM 93,138 5,571,000 0.18%
217 BLACKBAUD INC 82,218 5,583,000 0.18%
218 PENNEY J C 631,255 5,606,000 0.18%
219 ALBANY INTL CORP CL A 141,044 5,632,000 0.18%
220 PRESTIGE BRANDS HLDGS INC 101,740 5,636,000 0.18%
221 SCHLUMBERGER LTD 71,591 5,661,000 0.18%
222 TOTAL S A 118,440 5,697,000 0.18%
223 A O SMITH 66,168 5,830,000 0.19%
224 FISERV INC 54,694 5,947,000 0.19%
225 TOPBUILD CORP 169,114 6,122,000 0.20%
226 TUTOR PERINI CORP 261,240 6,152,000 0.20%
227 MPLX LP 183,529 6,172,000 0.20%
228 ECHO GLOBAL LOGISTICS INC COM 276,080 6,190,000 0.20%
229 Q2 Holdings Inc 225,121 6,308,000 0.20%
230 STEWART INFORMATION SVCS COR 152,918 6,332,000 0.20%
231 WESTERN GAS PARTNERS LP 125,685 6,335,000 0.20%
232 FERRO CORP 476,945 6,382,000 0.20%
233 GTT COMMUNICATIONS INC COM 346,555 6,404,000 0.20%
234 RICE ENERGY INCORPORATED 293,170 6,461,000 0.21%
235 CHANNELADVISOR CORP COM 446,612 6,471,000 0.21%
236 ZENDESK INC 246,180 6,494,000 0.21%
237 JACK IN THE BOX INC 76,075 6,536,000 0.21%
238 NETFLIX INC 71,910 6,578,000 0.21%
239 ONEOK PARTNERS LP 164,950 6,608,000 0.21%
240 HONDA MOTOR LTD 263,435 6,673,000 0.21%
241 DIAMONDBACK ENERGY INC 73,752 6,727,000 0.21%
242 PAYLOCITY HOLDING CORPORATION COM 158,608 6,852,000 0.22%
243 MONRO MUFFLER BRAKE INC 108,490 6,896,000 0.22%
244 CAVIUM INC 180,960 6,985,000 0.22%
245 KRATON CORP COM 257,350 7,188,000 0.23%
246 LDR HLDG CORP COM 194,710 7,195,000 0.23%
247 BOYD GAMING CORP COM 398,100 7,325,000 0.23%
248 NCR CORP NEW 269,960 7,497,000 0.24%
249 WHITING PETE CORP NEW 820,100 7,594,000 0.24%
250 EQT CORP 98,750 7,646,000 0.24%
Page 5 of 8

Portfolio data is normalized using SEC Form 13F filings, including the Original 13F-HR (0001106832-16-000007, filed 2016.08.10).

From 2023-01-03 onward, the SEC requires values to be reported in nearest dollars. Earlier filings reported values in thousands; therefore, positions shown as $0 in older filings may represent actual values between $0–$999.