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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
101 Plains Gp Hldgs Lp Npv A 149,700 1,561,000 0.05%
102 DICKS SPORTING GOODS INC 36,600 1,649,000 0.05%
103 SOUTHWEST AIRLS CO 42,440 1,664,000 0.05%
104 VARIAN MED SYS INC 20,930 1,721,000 0.05%
105 FASTENAL CO 38,810 1,723,000 0.05%
106 GENTEX CORP 114,500 1,769,000 0.06%
107 SS&C TECHNOLOGIES HLDGS INC 63,146 1,773,000 0.06%
108 UNDER ARMOUR INC 45,300 1,818,000 0.06%
109 TARGA RES CORP 43,180 1,820,000 0.06%
110 UNDER ARMOUR INC 50,656 1,844,000 0.06%
111 PHILLIPS 66 PARTNERS LP 33,190 1,854,000 0.06%
112 MATTEL INC 59,389 1,858,000 0.06%
113 CINTAS CORP 19,200 1,884,000 0.06%
114 OCCIDENTAL PETE CORP DEL 25,100 1,897,000 0.06%
115 CELANESE CORP DEL 31,230 2,044,000 0.07%
116 MARTIN MARIETTA MATLS INC 11,148 2,140,000 0.07%
117 CHINA PETROLEUM & CHEMICAL COR ADR SPONSORED 30,250 2,178,000 0.07%
118 TRANSCANADA CORP 50,690 2,292,000 0.07%
119 VERTEX PHARMACEUTICALS INC 26,830 2,308,000 0.07%
120 CHENIERE ENERGY INC 62,180 2,335,000 0.07%
121 PLAINS ALL AMERN PIPELINE L 87,160 2,396,000 0.08%
122 TESORO LOGISTICS LP 49,895 2,471,000 0.08%
123 EnLink Midstream Partners LP 149,600 2,488,000 0.08%
124 Patterson UTI Energy Inc Com 117,200 2,499,000 0.08%
125 VALERO ENERGY CORP NEW 50,000 2,550,000 0.08%
126 CADENCE DESIGN SYSTEM INC 106,009 2,576,000 0.08%
127 DOMINION MIDSTREAM PARTNERS 91,638 2,578,000 0.08%
128 TOTAL SYS SVCS INC 50,125 2,662,000 0.08%
129 IDEX CORP 33,630 2,761,000 0.09%
130 TOYOTA MOTOR CORP 28,100 2,810,000 0.09%
131 IDEXX LAB 30,565 2,838,000 0.09%
132 ISHARES TR 28,600 2,870,000 0.09%
133 FMC 61,995 2,871,000 0.09%
134 STERICYCLE INC 27,690 2,883,000 0.09%
135 JACOBS ENGR GROUP INC 58,310 2,904,000 0.09%
136 JPMORGAN CHASE & CO 46,900 2,914,000 0.09%
137 EMERGE ENERGY SVCS LP 255,425 2,945,000 0.09%
138 TOLL BROTHERS INC 111,200 2,992,000 0.10%
139 LEAR CORP 29,616 3,014,000 0.10%
140 MURPHY OIL 95,890 3,045,000 0.10%
141 UNIT CORP COM 195,730 3,046,000 0.10%
142 COOPER COS INC 18,135 3,111,000 0.10%
143 VIPER ENERGY PARTNERS LP COM UNT RP INT 168,940 3,151,000 0.10%
144 BOARDWALK PIPELINE PARTNERS UT LTD PARTNER 185,185 3,231,000 0.10%
145 GOLDCORP INC NEW 170,000 3,252,000 0.10%
146 PNC FINL SVCS GROUP INC 40,000 3,256,000 0.10%
147 ALLEGION PUB LTD CO 47,092 3,270,000 0.10%
148 COSTAR GROUP 15,055 3,292,000 0.11%
149 RANDGOLD RES LTD 30,000 3,361,000 0.11%
150 HIMAX TECHNOLOGIES INC 409,400 3,382,000 0.11%
Page 3 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.