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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 8X8 INC NEW COM 467,141 7,124 0.22%
2 A O SMITH 84,665 4,331 0.14%
3 ABIOMED INC 223,697 28,007 0.88%
4 ACADIA PHARMACEUTICALS INC COM 206,980 7,116 0.22%
5 ACI WORLDWIDE INC 283,810 6,071 0.19%
6 ADOBE INC 400,438 52,109 1.63%
7 ADVANCED MICRO DEVICES INC 628,550 9,145 0.29%
8 AERIE PHARMACEUTICALS INC COM 57,890 2,625 0.08%
9 AGNICO EAGLE MINES LTD 37,500 1,592 0.05%
10 ALIBABA GROUP HLDG LTD 2,290 247 0.01%
11 ALKERMES PLC 45,160 2,642 0.08%
12 ALLEGHENY TECHNOLOGIES INC 474,835 8,528 0.27%
13 ALLERGAN PLC 232 55 0.00%
14 ALLISON TRANSMISSION HLDGS INC COM 143,105 5,160 0.16%
15 ALMOST FAMILY INC COM 190,560 9,261 0.29%
16 ALPHABET INC 50 42 0.00%
17 ALPHABET INC 58,868 48,835 1.53%
18 AMAZON COM INC 34,520 30,603 0.96%
19 AMERICAN EXPRESS CO 2,675 212 0.01%
20 ANADARKO PETE CORP 83,940 5,204 0.16%
21 ANSYS 14,690 1,570 0.05%
22 ANTERO MIDSTREAM PARTNERS LP 36,800 1,220 0.04%
23 APACHE CORP 134,760 6,925 0.22%
24 APPLE INC 177,947 25,564 0.80%
25 APPLIED MATLS INC 1,006,703 39,161 1.23%
26 ARRAY BIOPHARMA INC 349,781 3,127 0.10%
27 ATLASSIAN CORP PLC 10,180 305 0.01%
28 AZENTA INC COM 274,565 6,150 0.19%
29 Acxiom Corp 311,220 8,860 0.28%
30 BAKER HUGHES INC 106,390 6,364 0.20%
31 BANCO DE CHILE 1,360 98 0.00%
32 BANK AMER CORP 485,800 11,460 0.36%
33 BANKUNITED INC 107,210 4,000 0.13%
34 BARRACUDA NETWORKS INC 315,696 7,296 0.23%
35 BARRICK GOLD CORP 92,500 1,757 0.06%
36 BERRY PLASTICS GROUP INC 250,840 12,183 0.38%
37 BIOGEN INC 120,846 33,042 1.04%
38 BIOVERATIV INC 202,510 11,029 0.35%
39 BOARDWALK PIPELINE PARTNERS UT LTD PARTNER 110,840 2,029 0.06%
40 BOEING CO 5,000 884 0.03%
41 BORGWARNER INC 10,340 432 0.01%
42 BOYD GAMING CORP COM 605,890 13,336 0.42%
43 BP PLC 79,070 2,729 0.09%
44 BRINKS CO 143,990 7,696 0.24%
45 BROADCOM LTD 620 136 0.00%
46 BRUNSWICK CORP 53,875 3,297 0.10%
47 BUCKEYE PARTNERS L P 14,341 983 0.03%
48 BUILDERS FIRSTSOURCE 571,680 8,518 0.27%
49 BUNGE LIMITED 40,810 3,235 0.10%
50 BURLINGTON STORES INC 130,625 12,709 0.40%
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