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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
51 CHEVRON CORP NEW 143,285 14,747,000 0.45%
52 BWX TECHNOLOGIES INC COM 380,740 14,609,000 0.44%
53 EXELIXIS INC 1,106,675 14,154,000 0.43%
54 PDC ENERGY INC 209,565 14,053,000 0.43%
55 HEALTHSOUTH CORP 344,940 13,994,000 0.42%
56 DST SYS INC DEL 117,828 13,894,000 0.42%
57 B & G FOODS INC NEW COM 279,255 13,734,000 0.42%
58 ISHARES TR 227,500 13,452,000 0.41%
59 JACK IN THE BOX INC 139,655 13,399,000 0.41%
60 SHOPIFY INC 308,460 13,239,000 0.40%
61 INTEGRA LIFESCIENCES HLDGS CP COM NEW 159,270 13,148,000 0.40%
62 LIGAND PHARMACEUTICALS INC 128,097 13,074,000 0.40%
63 LOGMEIN INC 144,435 13,055,000 0.39%
64 CommVault Systems Inc 244,402 12,985,000 0.39%
65 CALLON PETE CO DEL 823,980 12,936,000 0.39%
66 MEDIDATA SOLUTIONS INC 231,145 12,889,000 0.39%
67 VCA INCORPORATED 182,515 12,772,000 0.39%
68 ICON PLC 164,735 12,746,000 0.39%
69 CYRUSONE INC 267,575 12,729,000 0.39%
70 OSHKOSH CORP 224,100 12,550,000 0.38%
71 LITHIA MTRS INC COM 129,055 12,327,000 0.37%
72 BEACON ROOFING SUPPLY INC 292,446 12,303,000 0.37%
73 LUMENTUM HLDGS INC COM 293,565 12,262,000 0.37%
74 STARBUCKS CORP 224,990 12,181,000 0.37%
75 FAIR ISAAC CORP 97,374 12,132,000 0.37%
76 MASTEC INC 406,995 12,104,000 0.37%
77 BERRY PLASTICS GROUP INC 274,855 12,052,000 0.36%
78 ENERGY TRANSFER PRTNRS L P 312,569 11,565,000 0.35%
79 BELDEN INC 166,845 11,511,000 0.35%
80 ENCANA CORP 1,086,790 11,379,000 0.34%
81 SYNOVUS FINL CORP 348,969 11,352,000 0.34%
82 WEST PHARMACEUTICAL SVSC INC 149,985 11,174,000 0.34%
83 ITRON INC 200,190 11,163,000 0.34%
84 WILLIAMS COS INC DEL 362,600 11,143,000 0.34%
85 DYCOM INDS INC 133,250 10,897,000 0.33%
86 INSULET CORPORATION 262,560 10,749,000 0.33%
87 TREEHOUSE FOODS INC 122,885 10,714,000 0.32%
88 8X8 INC NEW COM 693,907 10,707,000 0.32%
89 QUANTA SVCS INC 379,775 10,630,000 0.32%
90 DOLBY LABORATORIES INC 195,515 10,615,000 0.32%
91 ANADARKO PETE CORP 163,100 10,334,000 0.31%
92 MONOLITHIC PWR SYS INC 126,995 10,223,000 0.31%
93 JOHN BEAN TECHNOLOGIES CORP COM 144,498 10,194,000 0.31%
94 CANTEL MEDICAL CORP 128,854 10,048,000 0.30%
95 Wright Medical Group NV 403,180 9,890,000 0.30%
96 HMS HOLDINGS CORPORATION 445,310 9,873,000 0.30%
97 Evolent Health, Inc. 397,884 9,796,000 0.30%
98 CHENIERE ENERGY INC 224,250 9,777,000 0.30%
99 SPDR SERIES TRUST 286,600 9,727,000 0.29%
100 CYPRESS SEMICONDUCTOR CORP 797,645 9,699,000 0.29%
Page 2 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.