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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
251 SUNOCO LOGISTICS PRTNRS L P 79,879 2,003,000 0.06%
252 CELANESE CORP DEL 29,400 1,926,000 0.06%
253 FASTENAL CO 38,810 1,902,000 0.06%
254 SOUTHWEST AIRLS CO 42,440 1,901,000 0.06%
255 TRANSCANADA CORP 46,830 1,841,000 0.06%
256 CHINA PETROLEUM & CHEMICAL COR ADR SPONSORED 27,910 1,818,000 0.06%
257 GENTEX CORP 114,500 1,797,000 0.06%
258 UNIT CORP COM 195,730 1,724,000 0.05%
259 CINTAS CORP 19,200 1,724,000 0.05%
260 OCCIDENTAL PETE CORP DEL 25,100 1,718,000 0.05%
261 DICKS SPORTING GOODS INC 36,600 1,711,000 0.05%
262 VARIAN MED SYS INC 20,930 1,675,000 0.05%
263 Plains Gp Hldgs Lp Npv A 184,500 1,603,000 0.05%
264 SONIC CORP 44,885 1,578,000 0.05%
265 VALERO ENERGY PARTNERS LP 31,800 1,506,000 0.05%
266 BANK AMER CORP 110,000 1,487,000 0.05%
267 ANSYS 15,690 1,404,000 0.04%
268 DST SYS INC DEL 11,840 1,335,000 0.04%
269 EMERGE ENERGY SVCS LP 259,200 1,288,000 0.04%
270 WABCO HLDGS INC 11,860 1,268,000 0.04%
271 GENESIS ENERGY LP COM UNITS NPV 38,690 1,230,000 0.04%
272 MOOG INC CL A 26,330 1,203,000 0.04%
273 CABOT OIL & GAS CORP 51,970 1,180,000 0.04%
274 PETROCHINA CO LTD 17,050 1,130,000 0.04%
275 CAMERON INTERNATIONAL COMPANY 16,770 1,124,000 0.04%
276 TARGA RES CORP 36,980 1,104,000 0.03%
277 MARATHON PETE CORP 29,500 1,097,000 0.03%
278 RPC INC 74,600 1,058,000 0.03%
279 ISHARES TR 38,400 1,033,000 0.03%
280 WATERS CORP 7,620 1,005,000 0.03%
281 TESORO CORP 11,600 998,000 0.03%
282 PDC ENERGY INC 16,200 963,000 0.03%
283 RPM INTL INC 20,240 958,000 0.03%
284 PRA GROUP INC 31,710 932,000 0.03%
285 PLAINS ALL AMERN PIPELINE L 44,055 924,000 0.03%
286 TALLGRASS ENERGY PAR 23,881 915,000 0.03%
287 MICROCHIP TECHNOLOGY 17,160 827,000 0.03%
288 PAYCHEX INC 14,740 796,000 0.02%
289 PHILLIPS 66 8,900 771,000 0.02%
290 COLUMBIA PIPELINE PARTNERS LP 47,895 699,000 0.02%
291 F5 NETWORKS INC 6,380 675,000 0.02%
292 CNOOC LTD 5,650 661,000 0.02%
293 BOEING CO 5,000 635,000 0.02%
294 STATOIL ASA 38,100 593,000 0.02%
295 RANGE RES CORP 16,990 550,000 0.02%
296 MONSANTO CO NEW 6,120 537,000 0.02%
297 TJX COS INC NEW 6,840 536,000 0.02%
298 HELMERICH & PAYNE INC 8,800 517,000 0.02%
299 TIVO INC 53,720 511,000 0.02%
300 ISHARES SILVER TR 34,200 502,000 0.02%
Page 6 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.