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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
1 ZEBRA TECHNOLOGIES CORPORATION CL A 152,720 13,936 0.44%
2 XPERI CORP 205,260 6,969 0.22%
3 XILINX INC 72,720 4,210 0.13%
4 Wright Medical Group NV 487,090 15,158 0.47%
5 WIX COM LTD 104,330 7,084 0.22%
6 WILLIAMS PARTNERS L P NEW 240,900 9,836 0.31%
7 WHITING PETE CORP NEW 224,310 2,122 0.07%
8 WESTLAKE CHEM CORP 50,155 3,313 0.10%
9 WESTERN GAS PARTNERS LP 96,381 5,826 0.18%
10 WESTERN ALLIANCE BANCORP 210,870 10,352 0.32%
11 WEBSTER FINL CORP CONN 114,385 5,724 0.18%
12 WEATHERFORD INTL PLC 1,252,620 8,330 0.26%
13 WATERS CORP 7,620 1,191 0.04%
14 WASTE CONNECTIONS INC 74,900 6,608 0.21%
15 WALGREENS BOOTS ALLIANCE INC 480 40 0.00%
16 WAGEWORKS INC COM 117,145 8,470 0.27%
17 Videocon D2H Ltd 40,105 461 0.01%
18 VONAGE HLDGS CORP 2,066,900 13,063 0.41%
19 VISTEON CORP COM NEW 148,695 14,565 0.46%
20 VISA INC 322,357 28,648 0.90%
21 VIPER ENERGY PARTNERS LP COM UNT RP INT 59,803 1,075 0.03%
22 VERTEX PHARMACEUTICALS INC 26,830 2,934 0.09%
23 VERINT SYS INC 183,555 7,962 0.25%
24 VEEVA SYS INC 601,720 30,856 0.97%
25 VCA INCORPORATED 14,720 1,347 0.04%
26 VARIAN MED SYS INC 20,930 1,907 0.06%
27 VAREX IMAGING CORP 8,372 281 0.01%
28 VALERO ENERGY CORP NEW 75,180 4,984 0.16%
29 VAIL RESORTS INC 24,810 4,761 0.15%
30 UNIVERSAL DISPLAY CORP 153,135 13,185 0.41%
31 UNIVAR INC 468,430 14,362 0.45%
32 UNITEDHEALTH GROUP INC 294,260 48,262 1.51%
33 UNITED RENTALS INC 208,060 26,018 0.82%
34 UNIT CORP COM 10,030 242 0.01%
35 UNION PAC CORP 2,000 212 0.01%
36 UNDER ARMOUR INC 45,300 896 0.03%
37 UNDER ARMOUR INC 50,656 927 0.03%
38 ULTA BEAUTY INC 111,403 31,775 1.00%
39 U S SILICA HLDGS INC 437,637 21,002 0.66%
40 TRUECAR INC 364,035 5,632 0.18%
41 TRINSEO S A 112,660 7,559 0.24%
42 TRIMBLE INC 57,340 1,835 0.06%
43 TRANSUNION 134,090 5,142 0.16%
44 TRANSOCEAN LTD 11,600 144 0.00%
45 TRANSDIGM GROUP INC 870 192 0.01%
46 TRANSCANADA CORP 66,600 3,074 0.10%
47 TOTAL S A 213,320 10,756 0.34%
48 TOPBUILD CORP 174,310 8,193 0.26%
49 TJX COS INC NEW 6,840 541 0.02%
50 TIVO CORPORATION COM 739 14 0.00%
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