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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 (2016Q3)
Portfolio Summary: 372 holdings with a total value of $3,306,159,000.
#
Name
Shares
Value ($)
%
Options
Notes
101 BP PLC 275,700 9,694,000 0.29%
102 ASTEC INDS INC 161,315 9,658,000 0.29%
103 ZELTIQ AESTHETICS INC 245,550 9,630,000 0.29%
104 CRYOLIFE INC 545,376 9,582,000 0.29%
105 INPHI CORPORATION 218,690 9,515,000 0.29%
106 BROADSOFT INC 204,270 9,509,000 0.29%
107 SCHLUMBERGER LTD 120,791 9,499,000 0.29%
108 YELP INC 226,020 9,425,000 0.29%
109 OLD DOMINION FREIGHT LINE IN 134,180 9,206,000 0.28%
110 POST HLDGS INC 118,223 9,123,000 0.28%
111 GRANITE CONSTR INC 181,720 9,039,000 0.27%
112 CIMAREX ENERGY 66,510 8,937,000 0.27%
113 TASER INTL INC 310,881 8,894,000 0.27%
114 WAGEWORKS INC COM 145,993 8,892,000 0.27%
115 BUFFALO WILD WINGS INC 63,165 8,890,000 0.27%
116 GENESEE AND WYOMING INC INC CL A 128,880 8,886,000 0.27%
117 SUPERNUS PHARMACEUTICALS INC 358,376 8,863,000 0.27%
118 HORIZON PHARMA PLC 478,965 8,684,000 0.26%
119 MEDICINES CO 228,495 8,623,000 0.26%
120 OCLARO INC 997,760 8,531,000 0.26%
121 NCR CORP NEW 265,000 8,530,000 0.26%
122 EXXON MOBIL CORP 96,910 8,458,000 0.26%
123 CARDIOVASCULAR SYS INC DEL COM 354,795 8,423,000 0.25%
124 TENNECO INC 142,665 8,313,000 0.25%
125 ISHARES 20 YEAR TREASURY BOND ETF 60,000 8,251,000 0.25%
126 SUNCOR ENERGY INC NEW 283,850 7,885,000 0.24%
127 LENNAR 185,750 7,865,000 0.24%
128 Acxiom Corp 294,555 7,850,000 0.24%
129 WIX COM LTD 180,500 7,839,000 0.24%
130 SYNCHRONOSS TECHNOLOGIES INC 190,260 7,835,000 0.24%
131 ENERGEN CORP COM 134,960 7,790,000 0.24%
132 SALESFORCE COM INC 109,060 7,779,000 0.24%
133 DISNEY WALT CO 83,560 7,759,000 0.23%
134 ROYAL DUTCH SHELL PLC 154,930 7,757,000 0.23%
135 VANDA PHARMACEUTICALS INC COM 465,545 7,747,000 0.23%
136 DORMAN PRODUCTS INC 120,195 7,680,000 0.23%
137 RICE ENERGY INCORPORATED 293,170 7,655,000 0.23%
138 ZENDESK INC 248,410 7,629,000 0.23%
139 HONDA MOTOR LTD 263,435 7,619,000 0.23%
140 GTT COMMUNICATIONS INC COM 322,507 7,589,000 0.23%
141 WILLIAMS PARTNERS L P NEW 202,430 7,528,000 0.23%
142 CONCHO RESOURCES 53,700 7,376,000 0.22%
143 NEOGENOMICS INC 892,782 7,339,000 0.22%
144 Patterson UTI Energy Inc Com 326,500 7,304,000 0.22%
145 SYNOPSYS INC 189,920 7,301,000 0.22%
146 FIVE9 INC 465,324 7,296,000 0.22%
147 STEWART INFORMATION SVCS COR 163,882 7,285,000 0.22%
148 VARONIS SYS INC COM 239,994 7,224,000 0.22%
149 DIAMONDBACK ENERGY INC 73,752 7,120,000 0.22%
150 BARRACUDA NETWORKS INC 277,481 7,070,000 0.21%
Page 3 of 8

Portfolio data is normalized using SEC Form 13F filings, including the Original 13F-HR (0001106832-16-000008, filed 2016.11.15).

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.