13F-HR 1 form13f_ms-research.Mar2011.txt UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 13F FORM 13F COVER PAGE Report for the Calendar Year or Quarter Ended: March 31, 2011 Check here if Amendment [ ]; Amendment Number: ______ This Amendment: [ ] is a restatement. [ ] adds new holdings entries. Institutional Investment Manager Filing this Report: Name: Main Street Research LLC Address: 30 Liberty Ship Way, Suite 3330 Sausalito, CA 94965 Form 13F File Number: 028-14411 The institutional investment manager filing this report and the person by whom it is signed hereby represent that the person signing the report is authorized to submit it, that all information contained herein is true, correct and complete, and that it is understood that all required items, statements, schedules, lists, and tables, are considered integral parts of this form. Person Signing this Report on Behalf of Reporting Manager: Name: Charito A. Mittelman Title: Chief Compliance Officer Phone: 415-289-1010 Signature, Place, and Date of Signing: Charito A. Mittelman Sausalito, CA May 06, 2011 Report Type: [x] 13F HOLDINGS REPORT. [ ] 13F NOTICE. [ ] 13F COMBINATION REPORT. FORM 13F SUMMARy: Report Summary: Number of Other Included Managers: 0 Form 13F Information Table Entry Total: 147 Form 13F Information Table Value Total: $258,529 List of Other Included Managers: NONE FORM 13F INFORMATION TABLE FORM 13F INFORMATION TABLE VALUE SHARES/ SH/ PUT/ INVSTMT OTHER VOTING AUTHORITY NAME OF ISSUER TITLE OF CLASS CUSIP (x$1000) PRN AMT PRN CALL DSCRETN MANAGERS SOLE SHARED NONE ------------------------------ ---------------- --------- -------- -------- --- ---- ------- ------------ -------- -------- -------- Berkshire Hathaway Cl A COM 084670108 877 7 SH Sole 7 3M Company COM 88579Y101 1926 20602 SH Sole 20602 Abbott Laboratories COM 002824100 1146 23364 SH Sole 23364 Ace Limited COM H0023R105 202 3125 SH Sole 3125 Advent Software Inc COM 007974108 4716 164384 SH Sole 164384 Agilent Technologies COM 00846u101 417 9312 SH Sole 9312 Alberto Culver COM 013078100 275 7375 SH Sole 7375 Altria Group Inc COM 02209S103 282 10833 SH Sole 10833 Aluminum Corp China COM 022276109 1508 63721 SH Sole 63721 American Electric Power COM 025537101 5521 157106 SH Sole 157106 American Express COM 025816109 1383 30607 SH Sole 30607 Anadarko Petroleum Corp COM 032511107 253 3091 SH Sole 3091 Aon Corp COM 037389103 208 3930 SH Sole 3930 Apple Computer COM 037833100 7433 21329 SH Sole 21329 Archer Daniels Midland COM 039483102 201 5575 SH Sole 5575 Astrazeneca Plc Adr F COM 046353108 235 5097 SH Sole 5097 At&t Inc COM 00206R102 1992 65067 SH Sole 65067 Auto Data Processing COM 053015103 588 11455 SH Sole 11455 BASF AG Spons Adr COM 055262505 970 11180 SH Sole 11180 Bank America Corp New COM 060505104 325 24403 SH Sole 24403 Bard C R Inc COM 067383109 3527 35492 SH Sole 35492 Berkshire Hathaway CL B COM 084670702 445 5321 SH Sole 5321 Berry Petroleum Co COM 085789105 213 4227 SH Sole 4227 Biogen IDEC Inc COM 09062X103 446 6075 SH Sole 6075 Borg Warner Automotive COM 099724106 4209 52820 SH Sole 52820 Brasil Telecom S.A. COM 10553M101 849 31421 SH Sole 31421 Brazil Foods SA Adr COM 10552T107 4428 231940 SH Sole 231940 Briggs & Stratton Corp COM 109043109 1828 80719 SH Sole 80719 Bristol-Myers Squibb Co. Com. COM 110122108 2997 113392 SH Sole 113392 C V S Caremark Corp COM 126650100 513 14959 SH Sole 14959 CSX Corp COM 126408103 210 2669 SH Sole 2669 Cardinal Health COM 14149Y108 398 9679 SH Sole 9679 Caterpillar Inc COM 149123101 445 4000 SH Sole 4000 Celgene Corp COM 151020104 474 8234 SH Sole 8234 Charles Schwab Corp COM 808513105 1585 87894 SH Sole 87894 Chevron Corp COM 166764100 7597 70679 SH Sole 70679 China Telecom Corp Ltd COM 169426103 2718 44550 SH Sole 44550 Chubb Corp COM 171232101 393 6415 SH Sole 6415 Cisco Systems, Inc. COM 17275r102 785 45747 SH Sole 45747 Clorox Co. Calif. COM 189054109 929 13256 SH Sole 13256 Cnooc Ltd COM 126132109 2292 9056 SH Sole 9056 Coca Cola Co. COM 191216100 880 13268 SH Sole 13268 Colgate-Palmolive Co COM 194162103 1858 23006 SH Sole 23006 Comcast Corp Cl A COM 20030N101 319 12908 SH Sole 12908 Computer Sciences Corp COM 205363104 275 5650 SH Sole 5650 Conoco Phillips COM 20825c104 542 6793 SH Sole 6793 Corning Inc COM 219350105 2761 133817 SH Sole 133817 Costco Corp COM 22160K105 2591 35331 SH Sole 35331 Danaher Corp Del COM 235851102 5075 97777 SH Sole 97777 Diageo Plc New ADR COM 25243q205 3052 40048 SH Sole 40048 Dominion Resources COM 25746u109 254 5685 SH Sole 5685 DuPont COM 263534109 355 6461 SH Sole 6461 Emerson Electric Co COM 291011104 5915 101230 SH Sole 101230 Exxon Mobil Corp COM 30231G102 4453 52930 SH Sole 52930 Fastenal Company COM 311900104 584 9015 SH Sole 9015 FedEx Corp COM 31428X106 2125 22714 SH Sole 22714 Forest Laboratories COM 345838106 278 8615 SH Sole 8615 Franklin Resources Inc COM 354613101 356 2846 SH Sole 2846 Freeport McMoran Cp & Gold COM 35671d857 2654 47785 SH Sole 47785 General Electric Co. COM 369604103 829 41367 SH Sole 41367 General Mills, Inc. COM 370334104 874 23905 SH Sole 23905 Gilead Sciences COM 375558103 3166 74535 SH Sole 74535 GlaxoSmithKline PLC COM 37733w105 251 6527 SH Sole 6527 Gold Corp Inc COM 380956409 750 15061 SH Sole 15061 Heinz H J Co COM 423074103 557 11400 SH Sole 11400 Hewlett Packard COM 428236103 1297 31649 SH Sole 31649 Honeywell COM 438516106 259 4346 SH Sole 4346 ITT Corporation COM 450911102 213 3550 SH Sole 3550 Illumina Inc COM 452327109 3601 51395 SH Sole 51395 Int'l Business Machines COM 459200101 3960 24284 SH Sole 24284 Intuitive Surgical Inc COM 46120e602 334 1001 SH Sole 1001 J P Morgan Chase & Co. COM 46625h100 1542 33440 SH Sole 33440 Johnson & Johnson COM 478160104 478 8075 SH Sole 8075 Johnson Controls Inc COM 478366107 5767 138727 SH Sole 138727 Juniper Networks COM 48203R104 3732 88690 SH Sole 88690 Kellogg Co. COM 487836108 475 8809 SH Sole 8809 Kons Philips Elec NV New COM 500472303 1033 32126 SH Sole 32126 Kraft foods Inc COM 50075n104 468 14908 SH Sole 14908 Massmutual Corporate Investors COM 576292106 1304 80450 SH Sole 80450 McDonald's Corp. COM 580135101 3477 45698 SH Sole 45698 Medco Health Solutions COM 58405U102 405 7214 SH Sole 7214 Merck & Co Inc COM 589331107 532 16111 SH Sole 16111 Microsoft Corp COM 594918104 270 10632 SH Sole 10632 Morgan Stanley COM 617446448 3416 125039 SH Sole 125039 Nestle SA ADR COM 641069406 313 5438 SH Sole 5438 Newmont Mining Corp. COM 651639106 800 14652 SH Sole 14652 Noble Energy Inc COM 655044105 2249 23272 SH Sole 23272 Novartis A G COM 66987V109 286 5261 SH Sole 5261 Nucor Corp COM 670346105 2000 43451 SH Sole 43451 Occidental Petroleum COM 674599105 219 2099 SH Sole 2099 Oracle COM 68389X105 1422 42546 SH Sole 42546 Pac Mercantile Bancorp COM 694552100 53 12650 SH Sole 12650 Parker-Hannifin Corp COM 701094104 3561 37610 SH Sole 37610 Pepsico COM 713448108 1974 30647 SH Sole 30647 Perrigo Company COM 714290103 1023 12865 SH Sole 12865 PetroChina Co. Ltd. COM 71646e100 505 3314 SH Sole 3314 Petroleo Brasileiro COM 71654v408 4345 107458 SH Sole 107458 Pfizer, Inc. COM 717081103 477 23506 SH Sole 23506 Philip Morris International COM 718172109 643 9798 SH Sole 9798 Procter & Gamble Co. COM 742718109 19798 321389 SH Sole 321389 Qualcomm Inc COM 747525103 975 17783 SH Sole 17783 Ross Stores Inc COM 778296103 353 4960 SH Sole 4960 S A P Aktiengesell ADR COM 803054204 1594 25985 SH Sole 25985 Salesforce.com COM 79466l302 2601 19475 SH Sole 19475 Sanofi Aventis Adr COM 80105n105 278 7906 SH Sole 7906 Sasol Limited Spon Adr COM 803866300 4331 74745 SH Sole 74745 Sempra Energy COM 816851109 443 8275 SH Sole 8275 Siemens AG Adr COM 826197501 2495 18165 SH Sole 18165 Sirius XM Radio COM 82967N108 84 51130 SH Sole 51130 Smith & Nephew Adr COM 83175M205 3167 56143 SH Sole 56143 Smucker JM Company COM 832696405 285 3997 SH Sole 3997 Snap-on Inc. COM 833034101 1702 28342 SH Sole 28342 St. Jude Medical COM 790849103 280 5460 SH Sole 5460 Stanley Black & Decker COM 854502101 3228 42144 SH Sole 42144 Sysco Corp. COM 871829107 224 8098 SH Sole 8098 Target Corp COM 87612E106 3246 64916 SH Sole 64916 Tata Motors Ltd COM 876568502 4570 164465 SH Sole 164465 Teradata Corp COM 88076W103 245 4836 SH Sole 4836 Teva Pharm Inds Ltd COM 881624209 283 5644 SH Sole 5644 The Southern Company COM 842587107 283 7432 SH Sole 7432 Total Fina Elf COM 89151e109 1101 18051 SH Sole 18051 Unilever PLC Amer Shs F COM 904767704 705 23030 SH Sole 23030 Union Pacific Corp COM 907818108 273 2777 SH Sole 2777 United Technologies COM 913017109 2137 25248 SH Sole 25248 VMware Inc COM 928563402 2973 36455 SH Sole 36455 Vale SA Adr COM 91912E105 1687 50579 SH Sole 50579 Verizon Communications COM 92343v104 677 17567 SH Sole 17567 Vodafone Group COM 92857w209 202 7025 SH Sole 7025 Wal-Mart Stores Inc. COM 931142103 218 4191 SH Sole 4191 Walgreen Co. COM 931422109 285 7104 SH Sole 7104 Walt Disney Holding Co. COM 254687106 242 5613 SH Sole 5613 Watson Pharmaceuticals COM 942683103 7318 130647 SH Sole 130647 Wells Fargo COM 949746101 633 19969 SH Sole 19969 Wesco Financial Corp COM 950817106 703 1805 SH Sole 1805 Westamerica Bancorp COM 957090103 2697 52496 SH Sole 52496 Whole Foods Market Inc COM 966837106 5725 86872 SH Sole 86872 Yanzhou Coal Mining Co. Adr COM 984846105 3866 106595 SH Sole 106595 Yum Brands Inc COM 988498101 3680 71615 SH Sole 71615 Zimmer Holdings Inc COM 98956P102 243 4011 SH Sole 4011 Health Care Reit REIT 42217K106 608 11585 SH Sole 11585 Buckeye Partners LP ETF 118230101 1868 29404 SH Sole 29404 IShares Trust MSCI EAFE Index ETF 464287465 299 4983 SH Sole 4983 Kinder Morgan Energy LP ETF 494550106 3723 50255 SH Sole 50255 Magellan Midstream Partners ETF 559080106 737 12304 SH Sole 12304 PowerShares QQQ Trust ETF 73935a104 255 4446 SH Sole 4446 ProShares UltraShort 20+ Year ETF 74347R297 3883 103725 SH Sole 103725 Vanguard Total Stock Market VI ETF 922908769 395 5749 SH Sole 5749 Total $258,529