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
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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 664 550,000 PRN   SOLE   550,000 0 0
Intel Corp., 2.95%, due 12/15/2035 CONVERTIBLE 458140AD2 1,518 1,250,000 PRN   SOLE   1,250,000 0 0
Microchip Tech., 1.63%, due 02/15/2025 CONVERTIBLE 595017AC8 957 1,000,000 PRN   SOLE   1,000,000 0 0
Accenture plc, Class A COMMON STOCK G1151C101 216,966 2,304,058 SH   SOLE   2,208,084 0 95,974
AGL Resources Inc. COMMON STOCK 001204106 51,649 883,481 SH   SOLE   846,149 0 37,332
Air Lease Corp. COMMON STOCK 00912X302 30,317 980,500 SH   SOLE   980,500 0 0
Alibaba Group Holding Ltd. (ADR) COMMON STOCK 01609W102 354 6,000 SH   SOLE   6,000 0 0
Allergan plc COMMON STOCK G0177J108 345,345 1,320,909 SH   SOLE   1,270,537 0 50,372
Altera Corp. COMMON STOCK 021441100 231,017 4,612,950 SH   SOLE   4,612,950 0 0
American Express Co. COMMON STOCK 025816109 88,956 1,200,000 SH   SOLE   1,200,000 0 0
Apple Inc. COMMON STOCK 037833100 310,927 2,942,177 SH   SOLE   2,818,919 0 123,258
Applied Materials Inc. COMMON STOCK 038222105 343,152 24,051,192 SH   SOLE   23,359,577 0 691,615
Autodesk Inc. COMMON STOCK 052769106 53,619 1,214,749 SH   SOLE   1,214,749 0 0
Axalta Coating Systems Ltd. COMMON STOCK G0750C108 19,230 758,895 SH   SOLE   758,895 0 0
Belmond Ltd. COMMON STOCK G1154H107 9,958 985,000 SH   SOLE   985,000 0 0
C.H. Robinson Worldwide Inc. COMMON STOCK 12541W209 27,112 400,000 SH   SOLE   400,000 0 0
Calgon Carbon Corp. COMMON STOCK 129603106 12,036 772,500 SH   SOLE   772,500 0 0
Cameron International Corp. COMMON STOCK 13342B105 9,689 158,000 SH   SOLE   158,000 0 0
Capital One Financial Corp. COMMON STOCK 14040H105 29,008 400,000 SH   SOLE   400,000 0 0
Cardinal Health Inc. COMMON STOCK 14149Y108 16,900 220,000 SH   SOLE   220,000 0 0
Charles Schwab Corp. COMMON STOCK 808513105 350,741 12,730,633 SH   SOLE   12,280,849 0 449,784
Ciena Corp. COMMON STOCK 171779309 64,232 3,100,000 SH   SOLE   3,100,000 0 0
Citrix Systems Inc. COMMON STOCK 177376100 62,352 900,000 SH   SOLE   900,000 0 0
Compass Minerals International Inc. COMMON STOCK 20451N101 182,595 2,416,092 SH   SOLE   2,329,904 0 86,188
Cummins Inc. COMMON STOCK 231021106 26,059 240,000 SH   SOLE   240,000 0 0
CVS Health Corp. COMMON STOCK 126650100 315,921 3,413,043 SH   SOLE   3,274,468 0 138,575
Danaher Corp. COMMON STOCK 235851102 531,507 6,505,663 SH   SOLE   6,237,613 0 268,050
Deere & Co. COMMON STOCK 244199105 185,491 2,575,245 SH   SOLE   2,506,632 0 68,613
DENTSPLY International Inc. COMMON STOCK 249030107 14,665 290,000 SH   SOLE   290,000 0 0
eBay Inc. COMMON STOCK 278642103 222,734 9,464,275 SH   SOLE   9,113,484 0 350,791
Ecolab Inc. COMMON STOCK 278865100 2,304 21,000 SH   SOLE   21,000 0 0
Energen Corp. COMMON STOCK 29265N108 4,712 94,500 SH   SOLE   94,500 0 0
Equifax Inc. COMMON STOCK 294429105 6,803 70,000 SH   SOLE   70,000 0 0
Essent Group Ltd. COMMON STOCK G3198U102 28,440 1,144,453 SH   SOLE   1,144,453 0 0
Expeditors International of Washington Inc. COMMON STOCK 302130109 69,556 1,478,338 SH   SOLE   1,478,338 0 0
EZchip Semiconductor Ltd. COMMON STOCK M4146Y108 19,499 775,000 SH   SOLE   775,000 0 0
FedEx Corp. COMMON STOCK 31428X106 9,359 65,000 SH   SOLE   65,000 0 0
First American Financial Corp. COMMON STOCK 31847R102 13,475 344,890 SH   SOLE   344,890 0 0
First Horizon National Corp. COMMON STOCK 320517105 47,828 3,372,926 SH   SOLE   3,372,926 0 0
Fiserv Inc. COMMON STOCK 337738108 16,456 190,000 SH   SOLE   190,000 0 0
Genesee & Wyoming Inc., Class A COMMON STOCK 371559105 5,908 100,000 SH   SOLE   100,000 0 0
GenMark Diagnostics Inc. COMMON STOCK 372309104 1,504 191,048 SH   SOLE   191,048 0 0
Gilead Sciences Inc. COMMON STOCK 375558103 392,898 4,158,285 SH   SOLE   4,001,410 0 156,875
Google Inc., Class A COMMON STOCK 02079K305 188,772 305,029 SH   SOLE   295,710 0 9,319
Google Inc., Class C COMMON STOCK 02079K107 299,738 514,292 SH   SOLE   492,649 0 21,643
Group 1 Automotive Inc. COMMON STOCK 398905109 5,961 70,000 SH   SOLE   70,000 0 0
Insperity Inc. COMMON STOCK 45778Q107 10,099 229,895 SH   SOLE   229,895 0 0
Intel Corp. COMMON STOCK 458140100 489,150 16,770,465 SH   SOLE   16,229,257 0 541,208
International Business Machines Corp. COMMON STOCK 459200101 88,432 610,000 SH   SOLE   610,000 0 0
Intuit Inc. COMMON STOCK 461202103 1,708 19,243 SH   SOLE   19,243 0 0
Iron Mountain Inc. COMMON STOCK 46284V101 353,791 11,876,348 SH   SOLE   11,405,261 0 471,087
Lam Research Corp. COMMON STOCK 512807108 22,866 350,000 SH   SOLE   350,000 0 0
Linear Technology Corp. COMMON STOCK 535678106 323 8,000 SH   SOLE   8,000 0 0
MasterCard Inc., Class A COMMON STOCK 57636Q104 253,989 2,942,403 SH   SOLE   2,818,339 0 124,064
McCormick & Co. COMMON STOCK 579780206 220,620 2,796,895 SH   SOLE   2,684,600 0 112,295
MDU Resources Group Inc. COMMON STOCK 552690109 217,005 13,122,761 SH   SOLE   12,616,575 0 506,186
Mondelez International Inc., Class A COMMON STOCK 609207105 486,809 12,099,905 SH   SOLE   11,626,666 0 473,239
Motorola Solutions Inc. COMMON STOCK 620076307 689,627 10,483,589 SH   SOLE   10,085,219 0 398,370
National Oilwell Varco Inc. COMMON STOCK 637071101 308,745 8,559,670 SH   SOLE   8,200,395 0 359,275
Northwest Natural Gas Co. COMMON STOCK 667655104 118,174 2,686,303 SH   SOLE   2,577,970 0 108,333
Novartis AG (ADR) COMMON STOCK 66987V109 243,113 2,751,731 SH   SOLE   2,644,830 0 106,901
Patterson Companies Inc. COMMON STOCK 703395103 227,747 5,483,238 SH   SOLE   5,265,824 0 217,414
PayPal Holdings Inc. COMMON STOCK 70450Y107 253,003 8,445,414 SH   SOLE   8,150,867 0 294,547
Pentair plc COMMON STOCK G7S00T108 365,654 7,454,637 SH   SOLE   7,164,066 0 290,571
PepsiCo Inc. COMMON STOCK 713448108 315,394 3,485,229 SH   SOLE   3,344,583 0 140,646
Perrigo Co. plc COMMON STOCK G97822106 313,043 2,058,051 SH   SOLE   1,990,479 0 67,572
Plantronics Inc. COMMON STOCK 727493108 30,913 607,924 SH   SOLE   607,924 0 0
Potash Corporation of Saskatchewan Inc. COMMON STOCK 73755L107 9,248 450,000 SH   SOLE   450,000 0 0
Praxair Inc. COMMON STOCK 74005P108 298,443 3,056,301 SH   SOLE   2,929,932 0 126,369
Procter & Gamble Co. COMMON STOCK 742718109 411,590 5,965,803 SH   SOLE   5,721,294 0 244,509
Progressive Corp. COMMON STOCK 743315103 18,384 600,000 SH   SOLE   600,000 0 0
QUALCOMM Inc. COMMON STOCK 747525103 76,888 1,431,000 SH   SOLE   1,431,000 0 0
Questar Corp. COMMON STOCK 748356102 219,160 11,759,231 SH   SOLE   11,291,072 0 468,159
Redwood Trust Inc. COMMON STOCK 758075402 14,532 1,050,000 SH   SOLE   1,050,000 0 0
Regal Beloit Corp. COMMON STOCK 758750103 5,363 95,000 SH   SOLE   95,000 0 0
Roche Holdings Ltd. (ADR) COMMON STOCK 771195104 29,655 900,000 SH   SOLE   900,000 0 0
SanDisk Corp. COMMON STOCK 80004C101 70,629 1,300,000 SH   SOLE   1,300,000 0 0
SEI Investments Co. COMMON STOCK 784117103 19,490 404,095 SH   SOLE   404,095 0 0
Shaw Communications Inc., Class B COMMON STOCK 82028K204 268,335 14,365,848 SH   SOLE   13,831,713 0 534,135
Sotheby's COMMON STOCK 835898107 2,399 75,000 SH   SOLE   75,000 0 0
Synopsys Inc. COMMON STOCK 871607107 9,047 195,900 SH   SOLE   195,900 0 0
Sysco Corp. COMMON STOCK 871829107 331,558 8,858,726 SH   SOLE   8,508,035 0 350,691
Taiwan Semiconductor Manufacturing Co., Ltd. (ADR) COMMON STOCK 874039100 104 5,000 SH   SOLE   5,000 0 0
Teleflex Inc. COMMON STOCK 879369106 7,142 57,500 SH   SOLE   57,500 0 0
Thomson Reuters Corp. COMMON STOCK 884903105 343,056 8,846,000 SH   SOLE   8,521,005 0 324,995
Trimble Navigation Ltd. COMMON STOCK 896239100 13,136 800,000 SH   SOLE   800,000 0 0
United Parcel Service Inc., Class B COMMON STOCK 911312106 385,081 4,070,483 SH   SOLE   3,901,923 0 168,560
Verisk Analytics Inc. COMMON STOCK 92345Y106 274,699 3,873,139 SH   SOLE   3,716,673 0 156,466
W.W. Grainger Inc. COMMON STOCK 384802104 56,978 265,000 SH   SOLE   265,000 0 0
Waste Management Inc. COMMON STOCK 94106L109 239,950 5,015,491 SH   SOLE   4,817,304 0 198,187
WD-40 Co. COMMON STOCK 929236107 111,464 1,311,090 SH   SOLE   1,251,415 0 59,675
Wells Fargo & Co. COMMON STOCK 949746101 48,783 950,000 SH   SOLE   950,000 0 0
Whole Foods Market Inc. COMMON STOCK 966837106 90,994 2,875,000 SH   SOLE   2,875,000 0 0
Xylem Inc. COMMON STOCK 98419M100 351,643 11,146,924 SH   SOLE   10,704,491 0 442,433