Dark
Light
System
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 IDEXX LAB 17,480 2,703 0.08%
252 ALKERMES PLC 45,160 2,642 0.08%
253 SUNCOR ENERGY INC NEW 85,680 2,635 0.08%
254 FORTINET INC 68,610 2,631 0.08%
255 AERIE PHARMACEUTICALS INC COM 57,890 2,625 0.08%
256 RANDGOLD RES LTD 30,000 2,618 0.08%
257 TALLGRASS ENERGY PAR 47,633 2,534 0.08%
258 GENERAL ELECTRIC CO 83,058 2,475 0.08%
259 ISHARES TR 21,720 2,472 0.08%
260 GENTEX CORP 114,500 2,442 0.08%
261 CINTAS CORP 19,200 2,430 0.08%
262 RESMED INC 30,705 2,210 0.07%
263 NOBLE MIDSTREAM PARTNERS LP 42,184 2,197 0.07%
264 SOUTHWEST AIRLS CO 40,840 2,196 0.07%
265 EQT MIDSTREAM PARTNERS LP 28,195 2,168 0.07%
266 STERICYCLE INC 25,890 2,146 0.07%
267 WHITING PETE CORP NEW 224,310 2,122 0.07%
268 BOARDWALK PIPELINE PARTNERS UT LTD PARTNER 110,840 2,029 0.06%
269 FASTENAL CO 38,810 1,999 0.06%
270 VARIAN MED SYS INC 20,930 1,907 0.06%
271 ENERGY TRANSFER L P 93,300 1,841 0.06%
272 TRIMBLE INC 57,340 1,835 0.06%
273 PETROCHINA CO LTD 24,240 1,776 0.06%
274 MOOG INC CL A 26,330 1,773 0.06%
275 ISHARES TR 54,700 1,768 0.06%
276 BARRICK GOLD CORP 92,500 1,757 0.06%
277 SM ENERGY CO 72,120 1,732 0.05%
278 AGNICO EAGLE MINES LTD 37,500 1,592 0.05%
279 ANSYS 14,690 1,570 0.05%
280 PLAINS GP HLDGS L P 47,721 1,492 0.05%
281 DST SYS INC DEL 11,840 1,450 0.05%
282 VCA INCORPORATED 14,720 1,347 0.04%
283 CABOT OIL & GAS CORP 51,970 1,243 0.04%
284 GOLDCORP INC NEW 85,000 1,240 0.04%
285 CRESTWOOD EQUITY PARTNERS LP 46,800 1,229 0.04%
286 ANTERO MIDSTREAM PARTNERS LP 36,800 1,220 0.04%
287 NUSTAR ENERGY LP 23,240 1,208 0.04%
288 WATERS CORP 7,620 1,191 0.04%
289 SONIC CORP 44,885 1,138 0.04%
290 RPM INTL INC 20,240 1,114 0.03%
291 VIPER ENERGY PARTNERS LP COM UNT RP INT 59,803 1,075 0.03%
292 PRA GROUP INC 31,710 1,051 0.03%
293 GILEAD SCIENCES INC 15,250 1,036 0.03%
294 PHILLIPS 66 12,630 1,001 0.03%
295 SHELL MIDSTREAM PARTNERS L P 30,921 997 0.03%
296 BUCKEYE PARTNERS L P 14,341 983 0.03%
297 CNOOC LTD 7,990 957 0.03%
298 STATOIL ASA 54,380 934 0.03%
299 UNDER ARMOUR INC 50,656 927 0.03%
300 UNDER ARMOUR INC 45,300 896 0.03%
Page 6 of 8