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, 2013
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 13, 2013
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:151
Form 13F Information Table Value Total: $321,029
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 781 5 SH Sole 5
3M Company COM 88579Y101 319 3000 SH Sole 3000
ASML Holdings COM N07059210 4838 71151 SH Sole 71151
AbbVie Inc COM 00287y109 886 21738 SH Sole 21738
Abbott Laboratories COM 002824100 878 24868 SH Sole 24868
Ace Limited COM H0023R105 267 3000 SH Sole 3000
Agilent Technologies COM 00846u101 320 7624 SH Sole 7624
Altria Group Inc COM 02209S103 387 11246 SH Sole 11246
Amazon.com COM 023135106 229 860 SH Sole 860
Ambev-Cia De Bebidas Adr COM 20441w203 5945 140445 SH Sole 140445
American Electric Power COM 025537101 6845 140761 SH Sole 140761
American Express COM 025816109 3402 50435 SH Sole 50435
Amgen Inc COM 031162100 329 3214 SH Sole 3214
Anadarko Petroleum Corp COM 032511107 215 2454 SH Sole 2454
Apple Computer COM 037833100 5855 13227 SH Sole 13227
Astrazeneca Plc Adr F COM 046353108 4716 94348 SH Sole 94348
At&t Inc COM 00206R102 3040 82870 SH Sole 82870
Auto Data Processing COM 053015103 622 9570 SH Sole 9570
Babson Cap Corp COM 05617k109 1316 80527 SH Sole 80527
Banco Bradesco S.A. COM 059460303 2289 134481 SH Sole 134481
Bank America Corp New COM 060505104 363 29836 SH Sole 29836
Bank of Marin Bancorp COM 063425102 330 8239 SH Sole 8239
Bard C R Inc COM 067383109 1644 16317 SH Sole 16317
Bed Bath and Beyond COM 075896100 2181 33853 SH Sole 33853
Berkshire Hathaway CL B COM 084670702 407 3905 SH Sole 3905
BioMarin Pharmaceuticals Inc COM 09061G101 2854 45845 SH Sole 45845
Biogen IDEC Inc COM 09062X103 1144 5938 SH Sole 5938
Bristol-Myers Squibb Co. Com. COM 110122108 5643 136996 SH Sole 136996
C V S Caremark Corp COM 126650100 778 14149 SH Sole 14149
Cabot Oil and Gas COM 127097103 203 3000 SH Sole 3000
Cardinal Health COM 14149Y108 351 8440 SH Sole 8440
Caterpillar Inc COM 149123101 993 11412 SH Sole 11412
Celgene Corp COM 151020104 886 7644 SH Sole 7644
Charles Schwab Corp COM 808513105 1412 79827 SH Sole 79827
Chevron Corp COM 166764100 9234 77710 SH Sole 77710
China Petroleum & Chemical Cor COM 16941R108 382 3267 SH Sole 3267
Chipotle Mexican Grill COM 169656105 304 933 SH Sole 933
Chubb Corp COM 171232101 298 3400 SH Sole 3400
Cisco Systems, Inc. COM 17275r102 372 17790 SH Sole 17790
Clorox Co. Calif. COM 189054109 1104 12469 SH Sole 12469
Cnooc Ltd COM 126132109 1946 10164 SH Sole 10164
Coca Cola Co. COM 191216100 1020 25212 SH Sole 25212
Colgate-Palmolive Co COM 194162103 2807 23781 SH Sole 23781
Comcast Corp Cl A COM 20030N101 500 11919 SH Sole 11919
Conoco Phillips COM 20825c104 327 5439 SH Sole 5439
Consolidated Edison COM 209115104 216 3532 SH Sole 3532
Costco Corp COM 22160K105 3461 32620 SH Sole 32620
Credit Suisse Group Adr COM 225401108 245 9360 SH Sole 9360
Danaher Corp Del COM 235851102 6388 102780 SH Sole 102780
Deutsche Bank AG COM D18190898 1080 27615 SH Sole 27615
Diageo Plc New ADR COM 25243q205 5879 46717 SH Sole 46717
Dominion Resources COM 25746u109 5708 98106 SH Sole 98106
Duke Energy Corp New COM 26441c105 224 3087 SH Sole 3087
Edison International COM 281020107 2462 48928 SH Sole 48928
Exxon Mobil Corp COM 30231G102 5526 61321 SH Sole 61321
Facebook Inc COM 30303m102 352 13743 SH Sole 13743
Fastenal Company COM 311900104 2474 48200 SH Sole 48200
Franklin Resources Inc COM 354613101 419 2779 SH Sole 2779
Gartner, Inc. COM 366651107 202 3705 SH Sole 3705
General Electric Co. COM 369604103 2376 102775 SH Sole 102775
General Mills, Inc. COM 370334104 1115 22619 SH Sole 22619
Gilead Sciences COM 375558103 3982 81362 SH Sole 81362
GlaxoSmithKline PLC COM 37733w105 225 4802 SH Sole 4802
Google Inc COM 38259p508 258 325 SH Sole 325
Heinz H J Co COM 423074103 755 10450 SH Sole 10450
Home Depot COM 437076102 6019 86250 SH Sole 86250
IAC Interactive Corp COM 44919p508 221 4950 SH Sole 4950
Int'l Business Machines COM 459200101 6082 28515 SH Sole 28515
Intuitive Surgical Inc COM 46120e602 2228 4535 SH Sole 4535
Johnson & Johnson COM 478160104 1280 15698 SH Sole 15698
Kellogg Co. COM 487836108 344 5334 SH Sole 5334
Kimberly-Clark Corp COM 494368103 236 2410 SH Sole 2410
Kons Philips Elec NV New COM 500472303 2594 87780 SH Sole 87780
Kraft Foods Group COM 50076q106 2310 44830 SH Sole 44830
Lilly Eli Co COM 532457108 210 3690 SH Sole 3690
LinkedIn COM 53578a108 3932 22335 SH Sole 22335
McDonald's Corp. COM 580135101 4344 43579 SH Sole 43579
Merck & Co Inc COM 58933y105 534 12084 SH Sole 12084
Microsoft Corp COM 594918104 405 14166 SH Sole 14166
Mondelez Intl Inc COM 609207105 4086 133477 SH Sole 133477
Nike COM 654106103 235 3982 SH Sole 3982
Noble Energy Inc COM 655044105 1031 8910 SH Sole 8910
Nordstrom Inc COM 655664100 211 3825 SH Sole 3825
Norfolk Southern Corp. COM 655844108 231 3000 SH Sole 3000
Oracle COM 68389X105 775 23968 SH Sole 23968
Pac Mercantile Bancorp COM 694552100 74 12650 SH Sole 12650
Pacific Gas & Electric COM 69331C108 209 4701 SH Sole 4701
Parker-Hannifin Corp COM 701094104 2663 29078 SH Sole 29078
Pepsico COM 713448108 214 2703 SH Sole 2703
Perrigo Company COM 714290103 1349 11358 SH Sole 11358
Pfizer, Inc. COM 717081103 557 19310 SH Sole 19310
Philip Morris International COM 718172109 742 8002 SH Sole 8002
Polaris Industries Inc COM 731068102 278 3009 SH Sole 3009
Precision Castparts Corp COM 740189105 5263 27753 SH Sole 27753
Procter & Gamble Co. COM 742718109 20439 265233 SH Sole 265233
Qualcomm Inc COM 747525103 3356 50130 SH Sole 50130
Rackspace Hosting Inc. COM 750086100 1760 34862 SH Sole 34862
Ross Stores Inc COM 778296103 2897 47787 SH Sole 47787
Royal Bank of Canada COM 780087102 5827 96640 SH Sole 96640
Royal Dutch Shell Plc Cl B COM 780259107 3785 56640 SH Sole 56640
S A P Aktiengesell ADR COM 803054204 2369 29418 SH Sole 29418
Salesforce.com COM 79466l302 1368 7648 SH Sole 7648
Sanofi Aventis Adr COM 80105n105 1193 23359 SH Sole 23359
Schlumberger Ltd. COM 806857108 229 3061 SH Sole 3061
Sempra Energy COM 816851109 1415 17700 SH Sole 17700
Siemens AG Adr COM 826197501 1963 18213 SH Sole 18213
Sirius XM Radio COM 82967N108 165 53630 SH Sole 53630
Smith & Nephew Adr COM 83175M205 1260 21820 SH Sole 21820
Smucker JM Company COM 832696405 399 4028 SH Sole 4028
Snap-on Inc. COM 833034101 2916 35260 SH Sole 35260
Sony Corp COM 835699307 456 26200 SH Sole 26200
Stanley Black & Decker COM 854502101 1392 17196 SH Sole 17196
Starbucks Corp COM 855244109 642 11265 SH Sole 11265
Suncor Energy Inc COM 867224107 822 27375 SH Sole 27375
Taiwan Semiconductor Adr COM 874039100 1697 98733 SH Sole 98733
Target Corp COM 87612E106 5071 74078 SH Sole 74078
Tata Motors Ltd COM 876568502 4149 169975 SH Sole 169975
Teradata Corp COM 88076W103 283 4836 SH Sole 4836
The Southern Company COM 842587107 786 16762 SH Sole 16762
Total Fina Elf COM 89151e109 3676 76615 SH Sole 76615
Toyota Motor Adr COM 892331307 667 6500 SH Sole 6500
Tractor Supply Company COM 892356106 1872 17975 SH Sole 17975
US Bancorp DEL COM 902973304 4297 126640 SH Sole 126640
Ultrapar Participacoes S.A. COM 90400p101 3404 134135 SH Sole 134135
Unilever PLC Amer Shs F COM 904767704 2285 54086 SH Sole 54086
Union Pacific Corp COM 907818108 492 3453 SH Sole 3453
United Technologies COM 913017109 4752 50866 SH Sole 50866
VMware Inc COM 928563402 1155 14642 SH Sole 14642
Verizon Communications COM 92343v104 6010 122284 SH Sole 122284
Visa Inc COM 92826c839 3745 22050 SH Sole 22050
Wal-Mart Stores Inc. COM 931142103 251 3349 SH Sole 3349
Walt Disney Holding Co. COM 254687106 346 6091 SH Sole 6091
Wells Fargo COM 949746101 3276 88560 SH Sole 88560
Whole Foods Market Inc COM 966837106 4955 57118 SH Sole 57118
Xilinx Inc COM 983919101 4455 116721 SH Sole 116721
Yum Brands Inc COM 988498101 5513 76634 SH Sole 76634
Zimmer Holdings Inc COM 98956P102 243 3224 SH Sole 3224
Vanguard Wellsley Income 921938106 275 11032 SH Sole 11032
PowerShares QQQ Trust ETF 73935a104 338 4896 SH Sole 4896
Vanguard Total Stock Market VI ETF 922908769 453 5589 SH Sole 5589
Buckeye Partners LP MLP 118230101 2327 38045 SH Sole 38045
Enterprise Prd Partners LP MLP 293792107 207 3436 SH Sole 3436
Kinder Morgan Energy LP MLP 494550106 3252 36225 SH Sole 36225
Magellan Midstream Partners MLP 559080106 6324 118364 SH Sole 118364
Oneok Partners LP MLP 68268N103 1375 23946 SH Sole 23946
American Tower Corp REIT 03027x100 5801 75411 SH Sole 75411
Boston Properties Inc REIT 101121101 1922 19015 SH Sole 19015
Digital Realty Trust Inc REIT 253868103 2827 42257 SH Sole 42257
H C P Inc Reit REIT 40414L109 221 4435 SH Sole 4435
Health Care Reit REIT 42217K106 4499 66253 SH Sole 66253
Simon Property Group REIT 828806109 212 1335 SH Sole 1335
Total $321,029