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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 (2015Q3)
Portfolio Summary: 364 holdings with a total value of $3,107,572,000.
#
Name
Shares
Value ($)
%
Options
Notes
51 HEARTLAND PMT SYS INC 239,090 15,065,000 0.48%
52 SPLUNK 271,440 15,024,000 0.48%
53 SPDR INDEX SHS FDS 430,000 14,556,000 0.47%
54 TEAM HEALTH HOLDINGS INCORPORATED 266,375 14,392,000 0.46%
55 NUANCE COMM 870,323 14,247,000 0.46%
56 POST HLDGS INC 240,390 14,207,000 0.46%
57 MGIC INVT CORP WIS 1,525,701 14,128,000 0.45%
58 G III APPAREL GROUP LTD COM 227,687 14,039,000 0.45%
59 SYNOVUS FINL CORP COM NEW 462,165 13,680,000 0.44%
60 RINGCENTRAL INC 747,833 13,573,000 0.44%
61 CORELOGIC INC 356,996 13,291,000 0.43%
62 TOYOTA MOTOR CORP 112,300 13,171,000 0.42%
63 APTARGROUP INC COM 196,195 12,941,000 0.42%
64 CAMERON INTERNATIONAL COMPANY 201,770 12,373,000 0.40%
65 STANDARD PAC CORP 1,497,864 11,983,000 0.39%
66 COACH INC 412,370 11,930,000 0.38%
67 MASONITE INTL CORP NEW COM 195,896 11,867,000 0.38%
68 MYRIAD GENETICS INC 315,470 11,824,000 0.38%
69 NUVASIVE INC COM 239,695 11,558,000 0.37%
70 BERRY PLASTICS GROUP INC 380,957 11,455,000 0.37%
71 BEACON ROOFING SUPPLY INC 346,114 11,245,000 0.36%
72 ENTERPRISE PRODS PARTNERS L 447,070 11,132,000 0.36%
73 ENERGY TRANSFER PRTNRS L P 269,300 11,060,000 0.36%
74 QLIK TECHNOLOGIES INC COM 297,408 10,841,000 0.35%
75 MOLINA HEALTHCARE INC 155,375 10,698,000 0.34%
76 HEALTH NET INC 175,740 10,583,000 0.34%
77 GNC HLDGS INC 260,490 10,529,000 0.34%
78 ClubCorp Hldgs Inc 473,319 10,157,000 0.33%
79 AMN HEALTHCARE SERVICES INC 337,318 10,123,000 0.33%
80 A O SMITH 152,483 9,940,000 0.32%
81 Anacor Pharmaceuticals Inc 83,245 9,799,000 0.32%
82 TOTAL S A 218,660 9,776,000 0.31%
83 iShares MSCI Japan ETF 850,000 9,716,000 0.31%
84 LogMeIn Inc 142,213 9,693,000 0.31%
85 BANK OF THE OZARKS 218,751 9,573,000 0.31%
86 EXXON MOBIL CORP 128,300 9,539,000 0.31%
87 DAVE & BUSTERS ENTMT INC COM 250,406 9,473,000 0.30%
88 DYCOM INDS INC COM 130,095 9,414,000 0.30%
89 SOUTHWESTERN ENERGY CO 738,950 9,377,000 0.30%
90 LIVANOVA PLC 153,594 9,335,000 0.30%
91 INOGEN INC COM 191,745 9,309,000 0.30%
92 VIRTUSA CORPORATION 176,619 9,062,000 0.29%
93 HORIZON PHARMA PLC 456,218 9,042,000 0.29%
94 FLOWERS FOODS INC 355,905 8,805,000 0.28%
95 FLEETMATICS GROUP PLC 178,947 8,785,000 0.28%
96 WENDYS CO 1,000,424 8,654,000 0.28%
97 IMAX CORP COM 254,972 8,616,000 0.28%
98 JACK IN THE BOX INC 109,840 8,462,000 0.27%
99 Callidus Software Inc 491,200 8,345,000 0.27%
100 AVG Technologies NV 381,208 8,291,000 0.27%
Page 2 of 8

Portfolio data is normalized using SEC Form 13F filings, including the Original 13F-HR (0001106832-15-000004, filed 2015.11.17).

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.