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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 (2014Q1)
Original 13F HR (0001106832-14-000002) filed in 2014.05.20
#
Name
Shares
Value ($)
%
Options
Notes
1 Actua Corp (ACTA) 567,950 11,598 0.33%
2 HORIZON PHARMA PLC 710,928 10,749 0.31%
3 8X8 INC NEW COM 653,382 7,063 0.20%
4 ABBOTT LABS 41,800 1,610 0.05%
5 ABBVIE INC 1,800 93 0.00%
6 ACADIA COMPANY COM 183,311 8,271 0.24%
7 ACCESS MIDSTREAM PARTNERS LP 100,700 5,795 0.16%
8 ADEPT TECHNOLOGY INC 282,043 5,359 0.15%
9 ALLSCRIPTS HEALTHCARE SOLUTN 418,425 7,544 0.21%
10 ALTERA CORPORATION 38,151 1,382 0.04%
11 ALTRA INDL MOTION CORP COM 201,883 7,207 0.20%
12 AMAZON COM INC 101,000 33,973 0.97%
13 AMERICAN EXPRESS CO 8,970 808 0.02%
14 AMGEN INC 2,000 247 0.01%
15 ANADARKO PETE CORP 2,000 170 0.00%
16 ANI PHARMACEUTICALS INC 179,295 5,621 0.16%
17 ANSYS 373,350 28,755 0.82%
18 ANTERO RES CORP 77,350 4,842 0.14%
19 APPLE INC 79,759 42,810 1.22%
20 ASPEN TECHNOLOGY COM USD0.10 173,300 7,341 0.21%
21 ATHENA HEALTH INC. 2,000 320 0.01%
22 ATRICURE INC 568,222 10,688 0.30%
23 AUTOMATIC DATA PROCESSING IN 3,000 232 0.01%
24 Acxiom Corp 284,557 9,787 0.28%
25 Allergan plc 1,200 149 0.00%
26 B/E AEROSPACE INC 6,400 555 0.02%
27 BAKER HUGHES INC 157,130 10,217 0.29%
28 BARNES GROUP INC COM 207,543 7,984 0.23%
29 BHP BILLITON LTD 29,500 1,999 0.06%
30 BILL BARRETT CP 20,000 512 0.01%
31 BIOGEN INC 134,770 41,222 1.17%
32 BLACKROCK INC 211,857 66,625 1.89%
33 BOEING CO 5,000 627 0.02%
34 BONANZA CREEK ENERGY INC 31,215 1,386 0.04%
35 BORGWARNER INC 1,090,200 67,015 1.91%
36 BP PLC 339,200 16,316 0.46%
37 BROADCOM CORP CL A 21,300 670 0.02%
38 BUCKEYE PARTNERS L P 49,110 3,686 0.10%
39 CABOT OIL & GAS CORP 110,100 3,730 0.11%
40 CAMERON INTERNATIONAL COMPANY 17,600 1,087 0.03%
41 CANADIAN NAT RES LTD 123,750 4,748 0.14%
42 CANCER GENETICS 186,410 2,813 0.08%
43 CARDIOVASCULAR SYS INC DEL COM 259,270 8,242 0.23%
44 CARRIZO OIL & GAS INC 197,760 10,572 0.30%
45 CATERPILLAR INC 1,500 149 0.00%
46 CBRE GROUP INC 1,338,338 36,711 1.04%
47 CF INDS HLDGS INC 28,300 7,376 0.21%
48 CHENIERE ENERGY INC 197,100 10,909 0.31%
49 CHEVRON CORP NEW 25,170 2,993 0.09%
50 CHICAGO BRIDGE & IRON CO N V 450,808 39,288 1.12%
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