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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
1 DISNEY WALT CO 658,290 67,277,000 2.16%
2 NXP SEMICONDUCTORS N V 769,390 66,991,000 2.16%
3 FACEBOOK INC 718,285 64,574,000 2.08%
4 ISHARES TR 1,067,500 61,189,000 1.97%
5 RED HAT INC 792,530 56,967,000 1.83%
6 HOME DEPOT INC 477,290 55,122,000 1.77%
7 VISA INC 772,530 53,814,000 1.73%
8 GILEAD SCIENCES INC 516,370 50,702,000 1.63%
9 NIKE INC 407,773 50,144,000 1.61%
10 SCHWAB CHARLES CORP 1,735,940 49,578,000 1.60%
11 APPLE INC 446,700 49,271,000 1.59%
12 PALO ALTO NETWORKS 280,700 48,280,000 1.55%
13 AMAZON COM INC 90,360 46,254,000 1.49%
14 CME GROUP INC 495,630 45,965,000 1.48%
15 FEDEX CORP 309,452 44,555,000 1.43%
16 SALESFORCE COM INC 641,125 44,513,000 1.43%
17 ST JUDE 699,205 44,113,000 1.42%
18 MIDDLEBY CORP 419,218 44,098,000 1.42%
19 STARBUCKS CORP 740,120 42,068,000 1.35%
20 WABTEC 475,580 41,875,000 1.35%
21 EDWARDS LIFESCIENCES CORP 288,100 40,959,000 1.32%
22 ORACLE CORP 1,049,850 37,921,000 1.22%
23 UNITEDHEALTH GROUP INC 321,280 37,272,000 1.20%
24 MORGAN STANLEY 1,178,575 37,125,000 1.19%
25 CVS HEALTH CORP 383,600 37,010,000 1.19%
26 MOBILEYE N V AMSTELVEEN 730,220 33,210,000 1.07%
27 JB HUNT TRANSPORT 447,020 31,917,000 1.03%
28 CONOCOPHILLIPS 664,062 31,848,000 1.02%
29 ULTA BEAUTY INC 191,080 31,213,000 1.00%
30 WILLIAMS SONOMA INC COM 375,530 28,672,000 0.92%
31 EOG RES INC 385,605 28,072,000 0.90%
32 MEDIVATION INC 617,040 26,224,000 0.84%
33 C.H. ROBINSON WORLDW 371,192 25,159,000 0.81%
34 CBRE GROUP INC 736,212 23,559,000 0.76%
35 BRISTOL MYERS SQUIBB CO 393,310 23,284,000 0.75%
36 HANESBRANDS INC 797,040 23,066,000 0.74%
37 AMSURG CORP 276,345 21,475,000 0.69%
38 LIGAND PHARMACEUTICALS INC 209,986 17,985,000 0.58%
39 LENNAR 371,500 17,880,000 0.58%
40 J2 GLOBAL INC 249,623 17,686,000 0.57%
41 NETFLIX INC 170,980 17,655,000 0.57%
42 ADOBE INC 214,400 17,628,000 0.57%
43 PACCAR INC 325,610 16,987,000 0.55%
44 ACADIA HEALTHCARE COMPANY IN 247,118 16,377,000 0.53%
45 ABIOMED INC 174,681 16,203,000 0.52%
46 SS&C TECHNOLOGIES HLDGS INC 228,611 16,012,000 0.52%
47 HELEN OF TROY LTD 175,642 15,685,000 0.50%
48 PENN NATL GAMING INC 914,305 15,342,000 0.49%
49 ALERE INC 316,847 15,256,000 0.49%
50 TYLER TECHNOLOGIES INC 101,589 15,168,000 0.49%
Page 1 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.