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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
1 EDWARDS LIFESCIENCES CORP 529,330 63,816,000 1.93%
2 HOME DEPOT INC 485,740 62,505,000 1.89%
3 EOG RES INC 631,040 61,028,000 1.85%
4 VISA INC 710,410 58,751,000 1.78%
5 ADOBE INC 522,300 56,690,000 1.71%
6 AMAZON COM INC 66,830 55,957,000 1.69%
7 ALPHABET INC 69,855 54,298,000 1.64%
8 ISHARES TR 1,425,000 53,366,000 1.61%
9 ULTA BEAUTY INC 220,295 52,426,000 1.59%
10 CME GROUP INC 482,200 50,400,000 1.52%
11 GENERAL ELECTRIC CO 1,699,500 50,339,000 1.52%
12 NXP SEMICONDUCTORS N V 481,670 49,135,000 1.49%
13 DEVON ENERGY CORP NEW 1,082,140 47,733,000 1.44%
14 ABIOMED INC 362,427 46,601,000 1.41%
15 TRANSDIGM GROUP INC COM 159,960 46,248,000 1.40%
16 MEDTRONIC PLC 519,670 44,899,000 1.36%
17 UNITEDHEALTH GROUP INC 300,030 42,004,000 1.27%
18 COACH INC 1,103,095 40,329,000 1.22%
19 FACEBOOK INC 308,725 39,600,000 1.20%
20 MONSTER BEVERAGE COR 264,415 38,819,000 1.17%
21 APPLE INC 341,560 38,613,000 1.17%
22 PIONEER NAT RES CO 204,100 37,891,000 1.15%
23 PALO ALTO NETWORKS 236,370 37,661,000 1.14%
24 BIOGEN INC 116,380 36,430,000 1.10%
25 APPLIED MATLS INC 1,205,500 36,346,000 1.10%
26 MICROSOFT CORP 619,450 35,680,000 1.08%
27 ELECTRONIC ARTS INC 383,280 32,732,000 0.99%
28 MICROCHIP TECHNOLOGY 522,120 32,445,000 0.98%
29 DELPHI AUTOMOTIVE PLC 448,220 31,967,000 0.97%
30 RED HAT INC 362,700 29,317,000 0.89%
31 CONTINENTAL RESOURE 557,540 28,970,000 0.88%
32 MOBILEYE N V AMSTELVEEN 672,800 28,641,000 0.87%
33 JB HUNT TRANSPORT 344,280 27,935,000 0.84%
34 FEDEX CORP 149,360 26,090,000 0.79%
35 COSTCO WHSL CORP NEW 159,020 24,252,000 0.73%
36 POWERSHARES QQQ TRUST 200,000 23,744,000 0.72%
37 CBRE GROUP INC 822,180 23,005,000 0.70%
38 BRISTOL MYERS SQUIBB CO 423,260 22,822,000 0.69%
39 SHERWIN WILLIAMS CO 77,860 21,541,000 0.65%
40 U S SILICA HLDGS INC COM 416,125 19,375,000 0.59%
41 EURONET WORLDWIDE INC 235,958 19,308,000 0.58%
42 SCHWAB CHARLES CORP 608,150 19,199,000 0.58%
43 GILEAD SCIENCES INC 231,000 18,277,000 0.55%
44 ENTERPRISE PRODS PARTNERS L 618,670 17,094,000 0.52%
45 MICROSEMI CORP 397,195 16,674,000 0.50%
46 CEPHEID 303,000 15,965,000 0.48%
47 NUVASIVE INC COM 236,685 15,777,000 0.48%
48 BURLINGTON STORES INC 192,438 15,591,000 0.47%
49 INTERXION HOLDING N.V 423,617 15,343,000 0.46%
50 PRA HEALTH SCIENCES INC 268,445 15,170,000 0.46%
Page 1 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.