Dark
Light
System
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 (2016Q2)
Portfolio Summary: 373 holdings with a total value of $3,135,064,000.
#
Name
Shares
Value ($)
%
Options
Notes
51 CHEVRON CORP NEW 143,285 15,021,000 0.48%
52 DYCOM INDS INC 166,120 14,911,000 0.48%
53 TREEHOUSE FOODS INC 144,020 14,784,000 0.47%
54 ENERGIZER HLDGS INC NEW COM 285,735 14,712,000 0.47%
55 INTERXION HOLDING N.V 396,982 14,641,000 0.47%
56 COGENT COMMUNICATIONS HLDGS IN COM NEW 359,509 14,402,000 0.46%
57 BURLINGTON STORES INC 214,468 14,307,000 0.46%
58 ENERGY TRANSFER PRTNRS L P 369,139 14,053,000 0.45%
59 DST SYS INC DEL 119,838 13,953,000 0.45%
60 BWX TECHNOLOGIES INC COM 388,090 13,882,000 0.44%
61 HEICO CORP NEW 206,328 13,785,000 0.44%
62 HEALTHSOUTH CORP 351,520 13,646,000 0.44%
63 BEACON ROOFING SUPPLY INC 298,096 13,554,000 0.43%
64 STARBUCKS CORP 233,740 13,351,000 0.43%
65 FAIR ISAAC CORP 116,474 13,163,000 0.42%
66 CommVault Systems Inc 302,397 13,061,000 0.42%
67 OLIN CORP 521,960 12,965,000 0.41%
68 VALMONT INDS INC 95,660 12,940,000 0.41%
69 PANERA BREAD CO 59,502 12,611,000 0.40%
70 ACADIA COMPANY COM 222,801 12,343,000 0.39%
71 WEST PHARMACEUTICAL SVSC INC 159,095 12,072,000 0.39%
72 NUVASIVE INC 201,450 12,031,000 0.38%
73 BERRY PLASTICS GROUP INC 308,935 12,002,000 0.38%
74 MICROSEMI CORP 360,540 11,782,000 0.38%
75 LITTELFUSE INC 96,135 11,362,000 0.36%
76 MASTEC INC 506,720 11,310,000 0.36%
77 TENNECO INC 241,405 11,252,000 0.36%
78 CALLON PETE CO DEL 985,030 11,062,000 0.35%
79 VISTEON CORP COM NEW 163,849 10,783,000 0.34%
80 HALLIBURTON CO 233,740 10,586,000 0.34%
81 DUPONT FABROS TECHNOLOGY INC 221,683 10,539,000 0.34%
82 SUPERIOR ENERGY SVCS INC 568,600 10,468,000 0.33%
83 SCHWAB CHARLES CORP 412,710 10,446,000 0.33%
84 POLYONE CORP 292,895 10,322,000 0.33%
85 SYNOVUS FINL CORP 355,679 10,311,000 0.33%
86 ASTEC INDS INC 182,885 10,269,000 0.33%
87 B & G FOODS INC NEW COM 210,800 10,161,000 0.32%
88 BP PLC 275,700 9,790,000 0.31%
89 ENERGEN CORP COM 200,360 9,659,000 0.31%
90 CARRIZO OIL & GAS INC 267,519 9,591,000 0.31%
91 CANTEL MEDICAL CORP 137,999 9,485,000 0.30%
92 GRANITE CONSTR INC 204,915 9,334,000 0.30%
93 CYRUSONE INC 167,165 9,304,000 0.30%
94 EXLSERVICE HOLDINGS INC COM 177,239 9,289,000 0.30%
95 DOLBY LABORATORIES INC 193,745 9,271,000 0.30%
96 EXXON MOBIL CORP 96,910 9,084,000 0.29%
97 SUPERNUS PHARMACEUTICALS INC 444,161 9,048,000 0.29%
98 8X8 INC NEW COM 610,612 8,921,000 0.28%
99 INTEGRA LIFESCIENCES HLDGS CP COM NEW 111,150 8,868,000 0.28%
100 BROADSOFT INC 216,120 8,867,000 0.28%
Page 2 of 8

Portfolio data is normalized using SEC Form 13F filings, including the Original 13F-HR (0001106832-16-000007, filed 2016.08.10).

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.