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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 ISHARES TR 1,780,000 70,114 2.20%
2 HOME DEPOT INC 395,551 58,079 1.82%
3 ADOBE INC 400,438 52,109 1.63%
4 MICROCHIP TECHNOLOGY 699,088 51,579 1.62%
5 ALPHABET INC 58,868 48,835 1.53%
6 UNITEDHEALTH GROUP INC 294,260 48,262 1.51%
7 CME GROUP INC 391,779 46,543 1.46%
8 MICROSOFT CORP 704,735 46,414 1.45%
9 COSTCO WHSL CORP NEW 236,860 39,719 1.24%
10 APPLIED MATLS INC 1,006,703 39,161 1.23%
11 DELPHI AUTOMOTIVE PLC 482,137 38,807 1.22%
12 SCHWAB CHARLES CORP 939,704 38,349 1.20%
13 PANERA BREAD CO 140,209 36,717 1.15%
14 MOBILEYE N V AMSTELVEEN 581,375 35,696 1.12%
15 MORGAN STANLEY 816,420 34,975 1.10%
16 COACH INC 839,475 34,696 1.09%
17 CITIGROUPINC 577,184 34,527 1.08%
18 FEDEX CORP 174,342 34,023 1.07%
19 BIOGEN INC 120,846 33,042 1.04%
20 ULTA BEAUTY INC 111,403 31,775 1.00%
21 ELECTRONIC ARTS INC 353,968 31,687 0.99%
22 RED HAT INC 359,008 31,054 0.97%
23 MIDDLEBY CORP 226,890 30,959 0.97%
24 VEEVA SYS INC 601,720 30,856 0.97%
25 AMAZON COM INC 34,520 30,603 0.96%
26 VISA INC 322,357 28,648 0.90%
27 FACEBOOK INC 201,102 28,567 0.90%
28 ABIOMED INC 223,697 28,007 0.88%
29 CONTINENTAL RESOURE 614,724 27,921 0.87%
30 PARKER HANNIFIN CORP 171,311 27,465 0.86%
31 EOG RES INC 269,046 26,245 0.82%
32 UNITED RENTALS INC 208,060 26,018 0.82%
33 APPLE INC 177,947 25,564 0.80%
34 DICKS SPORTING GOODS INC 515,116 25,066 0.79%
35 PALO ALTO NETWORKS INC 212,235 23,915 0.75%
36 CBRE GROUP INC 668,784 23,267 0.73%
37 NETFLIX INC 147,035 21,733 0.68%
38 U S SILICA HLDGS INC 437,637 21,002 0.66%
39 HUNT J B TRANS SVCS INC 228,633 20,975 0.66%
40 ENTERPRISE PRODS PARTNERS L 690,120 19,054 0.60%
41 GRAND CANYON ED INC 243,915 17,467 0.55%
42 DAVE & BUSTERS ENTMT INC 282,205 17,240 0.54%
43 QUANTA SVCS INC 460,580 17,092 0.54%
44 MONSTER BEVERAGE CORP NEW 367,106 16,949 0.53%
45 EDWARDS LIFESCIENCES CORP 175,704 16,528 0.52%
46 MEDTRONIC PLC 204,124 16,444 0.52%
47 DEVON ENERGY CORP NEW 391,287 16,324 0.51%
48 PRA HEALTH SCIENCES INC 249,995 16,307 0.51%
49 CHEMOURS CO 415,155 15,983 0.50%
50 SYNOVUS FINL CORP 385,759 15,824 0.50%
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