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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
101 WHITING PETE CORP NEW 224,310 2,122 0.07%
102 STERICYCLE INC 25,890 2,146 0.07%
103 EQT MIDSTREAM PARTNERS LP 28,195 2,168 0.07%
104 SOUTHWEST AIRLS CO 40,840 2,196 0.07%
105 NOBLE MIDSTREAM PARTNERS LP 42,184 2,197 0.07%
106 RESMED INC 30,705 2,210 0.07%
107 CINTAS CORP 19,200 2,430 0.08%
108 GENTEX CORP 114,500 2,442 0.08%
109 ISHARES TR 21,720 2,472 0.08%
110 GENERAL ELECTRIC CO 83,058 2,475 0.08%
111 TALLGRASS ENERGY PAR 47,633 2,534 0.08%
112 RANDGOLD RES LTD 30,000 2,618 0.08%
113 AERIE PHARMACEUTICALS INC COM 57,890 2,625 0.08%
114 FORTINET INC 68,610 2,631 0.08%
115 SUNCOR ENERGY INC NEW 85,680 2,635 0.08%
116 ALKERMES PLC 45,160 2,642 0.08%
117 IDEXX LAB 17,480 2,703 0.08%
118 FAIRMOUNT SANTROL HLDGS INC 368,925 2,704 0.08%
119 BP PLC 79,070 2,729 0.09%
120 ENSCO PLC 310,490 2,779 0.09%
121 DOMINION MIDSTREAM PARTNERS 87,606 2,799 0.09%
122 PHILLIPS 66 PARTNERS LP 55,399 2,845 0.09%
123 KAR AUCTION SVCS INC 65,305 2,852 0.09%
124 CHENIERE ENERGY PARTNERS LP COMMON UNITS 89,190 2,882 0.09%
125 RANGE RES CORP 100,240 2,917 0.09%
126 VERTEX PHARMACEUTICALS INC 26,830 2,934 0.09%
127 Patterson UTI Energy Inc Com 121,640 2,952 0.09%
128 PORTOLA PHARMACEUTICALS INC 77,175 3,024 0.09%
129 TESORO LOGISTICS LP 56,443 3,074 0.10%
130 TRANSCANADA CORP 66,600 3,074 0.10%
131 ARRAY BIOPHARMA INC 349,781 3,127 0.10%
132 TESORO CORP 39,140 3,173 0.10%
133 RICE ENERGY INCORPORATED 135,690 3,216 0.10%
134 BUNGE LIMITED 40,810 3,235 0.10%
135 CHINA PETROLEUM & CHEMICAL COR ADR SPONSORED 39,740 3,239 0.10%
136 SYNNEX CORP 28,980 3,244 0.10%
137 DEXCOM INC 38,345 3,249 0.10%
138 PERKINELMER INC 56,060 3,255 0.10%
139 BRUNSWICK CORP 53,875 3,297 0.10%
140 WESTLAKE CHEM CORP 50,155 3,313 0.10%
141 SPDR GOLD TR 28,500 3,384 0.11%
142 KITE PHARMA INCORPORATED 43,110 3,384 0.11%
143 OWENS CORNING NEW 55,860 3,428 0.11%
144 EnLink Midstream Partners LP 192,200 3,517 0.11%
145 FIBROGEN INC 143,090 3,527 0.11%
146 ISHARES 20 YEAR TREASURY BOND ETF 30,000 3,621 0.11%
147 TARGA RES CORP 61,740 3,698 0.12%
148 FLIR SYS INC 104,040 3,775 0.12%
149 HUDSON TECHNOLOGIES INC 594,972 3,927 0.12%
150 COGNEX CORP 46,965 3,943 0.12%
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