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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 (2016Q1)
Portfolio Summary: 367 holdings with a total value of $3,202,024,000.
#
Name
Shares
Value ($)
%
Options
Notes
151 SEALED AIR CORP NEW 117,263 5,630,000 0.18%
152 BARD C R INC 27,641 5,602,000 0.17%
153 WASTE CONNECTIONS INC COM 86,710 5,601,000 0.17%
154 TRIMBLE INC 222,335 5,514,000 0.17%
155 GLOBAL PMTS INC 84,332 5,507,000 0.17%
156 ARAMARK 165,797 5,491,000 0.17%
157 WESTERN GAS PARTNERS LP 125,685 5,456,000 0.17%
158 GTT COMMUNICATIONS INC COM 328,670 5,436,000 0.17%
159 SPECTRUM BRANDS HLDGS INC 49,400 5,398,000 0.17%
160 BROADRIDGE FINL SOLUTIONS IN 90,929 5,393,000 0.17%
161 FERRO CORP 453,480 5,383,000 0.17%
162 NAVIGANT CONSULTING INC 337,470 5,335,000 0.17%
163 DIAMONDBACK ENERGY INC 68,872 5,316,000 0.17%
164 INGREDION INC 49,489 5,285,000 0.17%
165 STEWART INFORMATION SVCS COR 145,303 5,272,000 0.16%
166 SIGNATURE BANK 38,560 5,249,000 0.16%
167 ANADARKO PETE CORP 112,000 5,216,000 0.16%
168 DIGITAL RLTY TR INC 58,389 5,167,000 0.16%
169 INTUITIVE SURGICAL INC 8,350 5,019,000 0.16%
170 RESTAURANT BRANDS INTL INC 129,105 5,013,000 0.16%
171 SUNCOR ENERGY INC NEW 179,490 4,992,000 0.16%
172 TOTAL S A 109,330 4,966,000 0.16%
173 JARDEN CORP 84,118 4,959,000 0.15%
174 ZENDESK INC 233,905 4,896,000 0.15%
175 8X8 INC NEW COM 485,857 4,888,000 0.15%
176 CROWN HOLDINGS INC 97,914 4,856,000 0.15%
177 BOOZ ALLEN HAMILTON HLDG COR 157,969 4,783,000 0.15%
178 DAVE & BUSTERS ENTMT INC 123,291 4,781,000 0.15%
179 BOTTOMLINE TECH DEL INC COM 156,590 4,774,000 0.15%
180 MATTEL INC 141,789 4,767,000 0.15%
181 E TRADE FINANCIAL CORP 194,398 4,761,000 0.15%
182 NASDAQ OMX GROUP 71,090 4,719,000 0.15%
183 BUCKEYE PARTNERS L P 69,260 4,706,000 0.15%
184 MARATHON OIL CORP 418,650 4,664,000 0.15%
185 ISHARES TR 200,000 4,602,000 0.14%
186 VALERO ENERGY CORP NEW 71,670 4,597,000 0.14%
187 ALIGN TECHNOLOGY INC 63,120 4,588,000 0.14%
188 XYLEM INC 111,141 4,546,000 0.14%
189 CALLON PETE CO DEL 506,600 4,483,000 0.14%
190 TESORO LOGISTICS LP 97,095 4,433,000 0.14%
191 FIDELITY NATIONAL FINANCIAL 128,994 4,373,000 0.14%
192 VANTIV INC 80,866 4,357,000 0.14%
193 IRADIMED CORP 224,550 4,302,000 0.13%
194 UNDER ARMOUR INC 50,300 4,267,000 0.13%
195 SPLUNK INC 85,390 4,178,000 0.13%
196 HARRIS CORP 53,128 4,137,000 0.13%
197 CRAY INC 98,450 4,126,000 0.13%
198 STAMPS COM INC COM NEW 37,854 4,023,000 0.13%
199 Dentsply Intl Inc 65,238 4,021,000 0.13%
200 OWENS CORNING NEW 84,492 3,995,000 0.12%
Page 4 of 8

Portfolio data is normalized using SEC Form 13F filings, including the Original 13F-HR (0001106832-16-000006, filed 2016.05.17).

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.