The Securities and Exchange Commission has not necessarily reviewed the information in this filing and has not determined if it is accurate and complete.
The reader should not assume that the information is accurate and complete.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 13F

FORM 13F INFORMATION TABLE
OMB APPROVAL
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COLUMN 1 COLUMN 2 COLUMN 3 COLUMN 4 COLUMN 5 COLUMN 6 COLUMN 7 COLUMN 8
VALUE SHRS OR SH/ PUT/ INVESTMENT OTHER VOTING AUTHORITY
NAME OF ISSUER TITLE OF CLASS CUSIP (x$1000) PRN AMT PRN CALL DISCRETION MANAGER SOLE SHARED NONE
Exelixis Inc., 4.25%, due 08/15/2019 CONVERTIBLE 30161QAC8 419 550,000 PRN   SOLE   550,000 0 0
Microchip Tech., 1.63%, due 02/15/2025 CONVERTIBLE 595017AC8 1,038 1,000,000 PRN   SOLE   1,000,000 0 0
Accenture plc, Class A COMMON STOCK G1151C101 212,002 2,262,804 SH   SOLE   2,166,830 0 95,974
Actavis plc COMMON STOCK G0083B108 581,220 1,952,893 SH   SOLE   1,875,335 0 77,558
AGL Resources Inc. COMMON STOCK 001204106 137,407 2,767,507 SH   SOLE   2,674,840 0 92,667
Air Lease Corp. COMMON STOCK 00912X302 55,648 1,474,500 SH   SOLE   1,474,500 0 0
Alibaba Group Holding Ltd. (ADR) COMMON STOCK 01609W102 208 2,500 SH   SOLE   2,500 0 0
Altera Corp. COMMON STOCK 021441100 66,511 1,550,000 SH   SOLE   1,550,000 0 0
American Express Co. COMMON STOCK 025816109 42,966 550,000 SH   SOLE   550,000 0 0
Apple Inc. COMMON STOCK 037833100 327,093 2,628,727 SH   SOLE   2,516,208 0 112,519
Applied Materials Inc. COMMON STOCK 038222105 322,328 14,287,610 SH   SOLE   13,732,805 0 554,805
Autodesk Inc. COMMON STOCK 052769106 6,157 105,000 SH   SOLE   105,000 0 0
Belmond Ltd. COMMON STOCK G1154H107 25,573 2,082,500 SH   SOLE   2,082,500 0 0
Blount International Inc. COMMON STOCK 095180105 6,745 523,687 SH   SOLE   523,687 0 0
C.H. Robinson Worldwide Inc. COMMON STOCK 12541W209 50,046 683,500 SH   SOLE   683,500 0 0
Calgon Carbon Corp. COMMON STOCK 129603106 14,141 671,128 SH   SOLE   671,128 0 0
Cameron International Corp. COMMON STOCK 13342B105 6,046 134,000 SH   SOLE   134,000 0 0
Capital One Financial Corp. COMMON STOCK 14040H105 31,528 400,000 SH   SOLE   400,000 0 0
Cardinal Health Inc. COMMON STOCK 14149Y108 8,576 95,000 SH   SOLE   95,000 0 0
Charles Schwab Corp. COMMON STOCK 808513105 372,018 12,221,359 SH   SOLE   11,806,778 0 414,581
Checkpoint Systems Inc. COMMON STOCK 162825103 16,498 1,524,762 SH   SOLE   1,524,762 0 0
Ciena Corp. COMMON STOCK 171779309 69,999 3,625,000 SH   SOLE   3,625,000 0 0
Citrix Systems Inc. COMMON STOCK 177376100 26,825 420,000 SH   SOLE   420,000 0 0
Compass Minerals International Inc. COMMON STOCK 20451N101 216,697 2,324,821 SH   SOLE   2,238,633 0 86,188
Corning Inc. COMMON STOCK 219350105 15,309 675,000 SH   SOLE   675,000 0 0
CVS Health Corp. COMMON STOCK 126650100 381,267 3,694,087 SH   SOLE   3,537,680 0 156,407
Deere & Co. COMMON STOCK 244199105 24,115 275,000 SH   SOLE   275,000 0 0
Denbury Resources Inc. COMMON STOCK 247916208 8,925 1,224,347 SH   SOLE   1,224,347 0 0
DENTSPLY International Inc. COMMON STOCK 249030107 8,015 157,500 SH   SOLE   157,500 0 0
Dominion Diamond Corp. COMMON STOCK 257287102 17,365 1,016,104 SH   SOLE   1,016,104 0 0
eBay Inc. COMMON STOCK 278642103 389,602 6,754,547 SH   SOLE   6,498,100 0 256,447
Ecolab Inc. COMMON STOCK 278865100 2,402 21,000 SH   SOLE   21,000 0 0
Energen Corp. COMMON STOCK 29265N108 214,852 3,255,333 SH   SOLE   3,113,800 0 141,533
Equifax Inc. COMMON STOCK 294429105 6,510 70,000 SH   SOLE   70,000 0 0
Essent Group Ltd. COMMON STOCK G3198U102 41,762 1,746,639 SH   SOLE   1,746,639 0 0
Expeditors International of Washington Inc. COMMON STOCK 302130109 382,621 7,941,497 SH   SOLE   7,702,845 0 238,652
EZchip Semiconductor Ltd. COMMON STOCK M4146Y108 14,340 750,000 SH   SOLE   750,000 0 0
First American Financial Corp. COMMON STOCK 31847R102 16,591 465,000 SH   SOLE   465,000 0 0
First Horizon National Corp. COMMON STOCK 320517105 56,160 3,930,000 SH   SOLE   3,930,000 0 0
Fiserv Inc. COMMON STOCK 337738108 8,536 107,500 SH   SOLE   107,500 0 0
Genesee & Wyoming Inc., Class A COMMON STOCK 371559105 20,252 210,000 SH   SOLE   210,000 0 0
GenMark Diagnostics Inc. COMMON STOCK 372309104 14,531 1,119,516 SH   SOLE   1,119,516 0 0
Gentex Corp. COMMON STOCK 371901109 7,320 400,000 SH   SOLE   400,000 0 0
Gilead Sciences Inc. COMMON STOCK 375558103 458,776 4,675,181 SH   SOLE   4,504,220 0 170,961
Google Inc., Class A COMMON STOCK 38259P508 202,920 365,819 SH   SOLE   356,500 0 9,319
Google Inc., Class C COMMON STOCK 38259P706 383,213 699,294 SH   SOLE   669,320 0 29,974
Group 1 Automotive Inc. COMMON STOCK 398905109 22,877 265,000 SH   SOLE   265,000 0 0
Insperity Inc. COMMON STOCK 45778Q107 28,786 550,500 SH   SOLE   550,500 0 0
Intel Corp. COMMON STOCK 458140100 43,778 1,400,000 SH   SOLE   1,400,000 0 0
International Business Machines Corp. COMMON STOCK 459200101 73,830 460,000 SH   SOLE   460,000 0 0
Intuit Inc. COMMON STOCK 461202103 19,528 201,400 SH   SOLE   201,400 0 0
Iron Mountain Inc. COMMON STOCK 46284V101 394,107 10,803,366 SH   SOLE   10,358,318 0 445,048
Lam Research Corp. COMMON STOCK 512807108 7,024 100,000 SH   SOLE   100,000 0 0
Linear Technology Corp. COMMON STOCK 535678106 257 5,500 SH   SOLE   5,500 0 0
LinkedIn Corp. COMMON STOCK 53578A108 12,493 50,000 SH   SOLE   50,000 0 0
MasterCard Inc., Class A COMMON STOCK 57636Q104 249,786 2,891,377 SH   SOLE   2,767,313 0 124,064
McCormick & Co. COMMON STOCK 579780206 212,214 2,752,096 SH   SOLE   2,639,801 0 112,295
MDU Resources Group Inc. COMMON STOCK 552690109 211,574 9,914,417 SH   SOLE   9,495,429 0 418,988
Mindray Medical International Ltd. (ADR) COMMON STOCK 602675100 246 9,000 SH   SOLE   9,000 0 0
Mondelez International Inc. COMMON STOCK 609207105 383,329 10,621,476 SH   SOLE   10,218,770 0 402,706
Motorola Solutions Inc. COMMON STOCK 620076307 562,536 8,437,624 SH   SOLE   8,135,325 0 302,299
National Oilwell Varco Inc. COMMON STOCK 637071101 347,490 6,951,197 SH   SOLE   6,666,470 0 284,727
Nordstrom Inc. COMMON STOCK 655664100 6,249 77,800 SH   SOLE   77,800 0 0
Northwest Natural Gas Co. COMMON STOCK 667655104 127,030 2,649,218 SH   SOLE   2,540,885 0 108,333
Novartis AG (ADR) COMMON STOCK 66987V109 280,927 2,848,871 SH   SOLE   2,736,030 0 112,841
Patterson Companies Inc. COMMON STOCK 703395103 253,932 5,204,594 SH   SOLE   4,984,114 0 220,480
Pentair plc COMMON STOCK G7S00T104 451,365 7,177,048 SH   SOLE   6,886,477 0 290,571
PepsiCo Inc. COMMON STOCK 713448108 295,430 3,089,629 SH   SOLE   2,968,450 0 121,179
Perrigo Co. plc COMMON STOCK G97822103 413,486 2,497,648 SH   SOLE   2,409,800 0 87,848
Plantronics Inc. COMMON STOCK 727493108 38,256 722,500 SH   SOLE   722,500 0 0
PMC-Sierra Inc. COMMON STOCK 69344F106 8,339 898,596 SH   SOLE   898,596 0 0
Potash Corporation of Saskatchhewan Inc. COMMON STOCK 73755L107 14,513 450,000 SH   SOLE   450,000 0 0
Praxair Inc. COMMON STOCK 74005P104 361,230 2,991,798 SH   SOLE   2,875,129 0 116,669
Procter & Gamble Co. COMMON STOCK 742718109 373,228 4,554,888 SH   SOLE   4,367,345 0 187,543
Progressive Corp. COMMON STOCK 743315103 5,440 200,000 SH   SOLE   200,000 0 0
QUALCOMM Inc. COMMON STOCK 747525103 465,584 6,714,514 SH   SOLE   6,472,627 0 241,887
Questar Corp. COMMON STOCK 748356102 236,045 9,892,931 SH   SOLE   9,500,683 0 392,248
Redwood Trust Inc. COMMON STOCK 758075402 29,826 1,669,042 SH   SOLE   1,669,042 0 0
Regal-Beloit Corp. COMMON STOCK 758750103 16,783 210,000 SH   SOLE   210,000 0 0
Riverbed Technology Inc. COMMON STOCK 768573107 40,775 1,950,000 SH   SOLE   1,950,000 0 0
Roche Holdings Ltd. (ADR) COMMON STOCK 771195104 34,380 1,000,000 SH   SOLE   1,000,000 0 0
SEI Investments Co. COMMON STOCK 784117103 20,061 455,000 SH   SOLE   455,000 0 0
Shaw Communications Inc. COMMON STOCK 82028K200 305,765 13,631,979 SH   SOLE   13,158,544 0 473,435
Sotheby's COMMON STOCK 835898107 23,243 550,000 SH   SOLE   550,000 0 0
Synopsys Inc. COMMON STOCK 871607107 8,472 182,900 SH   SOLE   182,900 0 0
Sysco Corp. COMMON STOCK 871829107 320,961 8,506,795 SH   SOLE   8,192,404 0 314,391
Taiwan Semiconductor Manufacturing Co., Ltd. (ADR) COMMON STOCK 874039100 423 18,000 SH   SOLE   18,000 0 0
Target Corp. COMMON STOCK 87612E106 47,190 575,000 SH   SOLE   575,000 0 0
Teleflex Inc. COMMON STOCK 879369106 40,839 337,990 SH   SOLE   299,090 0 38,900
Thomson Reuters Corp. COMMON STOCK 884903105 345,887 8,527,790 SH   SOLE   8,207,195 0 320,595
United Parcel Service Inc. COMMON STOCK 911312106 385,678 3,978,520 SH   SOLE   3,830,460 0 148,060
UTi Worldwide Inc. COMMON STOCK G87210103 16,293 1,324,666 SH   SOLE   1,324,666 0 0
Verisk Analytics Inc., Class A COMMON STOCK 92345Y106 269,764 3,778,213 SH   SOLE   3,621,747 0 156,466
W&T Offshore Inc. COMMON STOCK 92922P106 6,929 1,355,874 SH   SOLE   1,355,874 0 0
W.W. Grainger Inc. COMMON STOCK 384802104 37,730 160,000 SH   SOLE   160,000 0 0
Waste Management Inc. COMMON STOCK 94106L109 259,274 4,781,005 SH   SOLE   4,582,818 0 198,187
WD-40 Co. COMMON STOCK 929236107 114,010 1,287,664 SH   SOLE   1,227,989 0 59,675
Wells Fargo & Co. COMMON STOCK 949746101 59,840 1,100,000 SH   SOLE   1,100,000 0 0
Whole Foods Market Inc. COMMON STOCK 966837106 72,131 1,385,000 SH   SOLE   1,385,000 0 0
Xylem Inc. COMMON STOCK 98419M100 323,157 9,227,778 SH   SOLE   8,862,893 0 364,885