Chief Compliance Officer

0001420506-26-000773.txt : 20260430 0001420506-26-000773.hdr.sgml : 20260430 20260430145542 ACCESSION NUMBER: 0001420506-26-000773 CONFORMED SUBMISSION TYPE: 13F-HR PUBLIC DOCUMENT COUNT: 2 CONFORMED PERIOD OF REPORT: 20260331 FILED AS OF DATE: 20260430 DATE AS OF CHANGE: 20260430 EFFECTIVENESS DATE: 20260430 FILER: COMPANY DATA: COMPANY CONFORMED NAME: Main Street Research LLC CENTRAL INDEX KEY: 0001513211 ORGANIZATION NAME: EIN: 680313978 STATE OF INCORPORATION: CT FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 13F-HR SEC ACT: 1934 Act SEC FILE NUMBER: 028-14411 FILM NUMBER: 26923893 BUSINESS ADDRESS: STREET 1: 342 MAIN STREET CITY: LAKEVILLE STATE: CT ZIP: 06039 BUSINESS PHONE: 860-435-2350 MAIL ADDRESS: STREET 1: 30 LIBERTY SHIP WAY, SUITE 3330 CITY: SAUSALITO STATE: CA ZIP: 94965 13F-HR 1 primary_doc.xml X0202 13F-HR LIVE false true false 0001513211 XXXXXXXX 03-31-2026 03-31-2026 false Main Street Research LLC

30 LIBERTY SHIP WAY, SUITE 3330 SAUSALITO CA 94965

13F HOLDINGS REPORT 028-14411 N Natalie McMahon Chief Compliance Officer 860-435-2350 Natalie McMahon, Chief Compliance Officer SAUSALITO CA 04-30-2026 0 148 1718527602 false INFORMATION TABLE 2 Form13F_InfoTable.xml INFORMATION TABLE FOR MAIN STREET RESEARCH LLC (9582) 3M CO COM 88579Y101 1142960 7870 SH SOLE N/A 7870 0 0 ABBOTT LABORATORIES COM 002824100 396237 3859 SH SOLE N/A 3859 0 0 ABBVIE INC COM 00287Y109 2231037 10258 SH SOLE N/A 10258 0 0 ACCENTURE PLC IRELAND SHS CLASS A G1151C101 333722 1683 SH SOLE N/A 1683 0 0 ADOBE INC COM 00724F101 244295 1005 SH SOLE N/A 1005 0 0 ADVANCED MICRO DEVICES INC COM 007903107 639787 3145 SH SOLE N/A 3145 0 0 ALPHABET INC CAP STK CL A 02079K305 89657148 311786 SH SOLE N/A 311786 0 0 ALPHABET INC CAP STK CL C 02079K107 6723215 23437 SH SOLE N/A 23437 0 0 AMAZON COM INC COM 023135106 56064761 269193 SH SOLE N/A 269193 0 0 AMERICAN EXPRESS CO COM 025816109 233817 773 SH SOLE N/A 773 0 0 AMPHENOL CORP CL A 032095101 38036757 301043 SH SOLE N/A 301043 0 0 ANALOG DEVICES INC COM 032654105 474347 1491 SH SOLE N/A 1491 0 0 AON PLC SHS CL A G0403H108 200769 622 SH SOLE N/A 622 0 0 APPLE INC COM 037833100 102424173 403578 SH SOLE N/A 403578 0 0 ARISTA NETWORKS INC COM SHS 040413205 4294967 34981 SH SOLE N/A 34981 0 0 ASML HLDG NV N Y REGISTRY SHS N07059210 55061440 41687 SH SOLE n/a 41687 0 0 ASTRAZENECA PLC ORD G0593M107 37598810 190644 SH SOLE N/A 190644 0 0 AT&T INC COM 00206R102 585395 20193 SH SOLE N/A 20193 0 0 AUTODESK INC COM 052769106 3448078 14403 SH SOLE N/A 14403 0 0 AUTOMATIC DATA PROCESSING IN COM 053015103 453498 2232 SH SOLE N/A 2232 0 0 BANK AMERICA CORP COM 060505104 582221 11943 SH SOLE N/A 11943 0 0 BARCLAYS PLC ADR 06738E204 18006546 850971 SH SOLE N/A 850971 0 0 BERKSHIRE HATHAWAY INC DEL CL A 084670108 3590700 5 SH SOLE N/A 5 0 0 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 5739858 11978 SH SOLE N/A 11978 0 0 BHP BILLITON LIMITED SPONSORED ADS 088606108 37767481 519212 SH SOLE N/A 519212 0 0 BLACKSTONE INC COM 09260D107 611402 5317 SH SOLE N/A 5317 0 0 BOSTON SCIENTIFIC CORP COM 101137107 376061 5993 SH SOLE N/A 5993 0 0 BRISTOL-MYERS SQUIBB CO COM 110122108 421015 6942 SH SOLE N/A 6942 0 0 BROADCOM INC COM 11135F101 65740470 212402 SH SOLE N/A 212402 0 0 CAMECO CORP COM 13321L108 42257653 389077 SH SOLE N/A 389077 0 0 CAPITAL ONE FINL CORP COM 14040H105 215267 1180 SH SOLE N/A 1180 0 0 CATERPILLAR INC COM 149123101 43293991 61110 SH SOLE N/A 61110 0 0 CHENIERE ENERGY INC COM NEW 16411R208 286598 1010 SH SOLE N/A 1010 0 0 CHEVRON CORPORATION COM 166764100 3486556 16851 SH SOLE N/A 16851 0 0 CIRRUS LOGIC INC COM 172755100 829251 5734 SH SOLE N/A 5734 0 0 CISCO SYS INC COM 17275R102 780287 10057 SH SOLE N/A 10057 0 0 CITIGROUP INC COM NEW 172967424 626704 5526 SH SOLE N/A 5526 0 0 CLOROX CO DEL COM 189054109 988319 9537 SH SOLE N/A 9537 0 0 COHERENT CORP COM 19247G107 201526 846 SH SOLE N/A 846 0 0 COINBASE GLOBAL INC COM CL A 19260Q107 270646 1550 SH SOLE N/A 1550 0 0 COLGATE PALMOLIVE CO COM 194162103 637861 7484 SH SOLE N/A 7484 0 0 COMCAST CORP NEW CL A 20030N101 388159 13520 SH SOLE N/A 13520 0 0 CONOCOPHILLIPS COM 20825C104 257400 1950 SH SOLE N/A 1950 0 0 CORNING INC COM 219350105 52718016 387718 SH SOLE N/A 387718 0 0 COSTCO WHOLESALE CORPORATION COM 22160K105 45974280 46139 SH SOLE N/A 46139 0 0 CROWDSTRIKE HLDGS INC CL A 22788C105 245177 628 SH SOLE N/A 628 0 0 CURTISS WRIGHT CORP COM 231561101 689293 1012 SH SOLE N/A 1012 0 0 D R HORTON INC COM 23331A109 522534 3808 SH SOLE N/A 3808 0 0 DELTA AIR LINES INC COM NEW 247361702 338450 5091 SH SOLE N/A 5091 0 0 DISNEY WALT CO COM 254687106 1034182 10730 SH SOLE N/A 10730 0 0 EBAY INC. 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