{
  "crd_number": 114629,
  "slug": "main-street-research-llc-lakeville-ct-114629",
  "primary_business_name": "MAIN STREET RESEARCH LLC",
  "legal_name": "MAIN STREET RESEARCH LLC",
  "dbas": [],
  "city": "Lakeville",
  "state": "CT",
  "country": "United States",
  "cbsa_code": "45860",
  "metro": null,
  "registration_type": "sec",
  "registration_status": "Approved",
  "registration_date": "2000-11-14",
  "years_registered": 25,
  "period": "2026-10-01",
  "filing_date": "2026-04-27",
  "carried_forward": false,
  "raum_total": 2681886634.0,
  "raum_discretionary": 2681886634.0,
  "raum_non_discretionary": 0.0,
  "raum_band": "1b_5b",
  "raum_band_label": "$1 billion to $5 billion",
  "total_employees": 24,
  "advisory_employees": 16,
  "client_count_bucket": null,
  "clients_by_type": {
    "charitable": {
      "raum": 43851697.0,
      "count": 5
    },
    "individuals": {
      "raum": 67948537.0,
      "count": 203
    },
    "pension_profit_sharing": {
      "raum": 16948381.0,
      "count": 8
    },
    "high_net_worth_individuals": {
      "raum": 2553138019.0,
      "count": 815
    }
  },
  "compensation_types": [
    "percentage_of_aum",
    "performance_based"
  ],
  "advisory_activities": [
    "educational_seminars",
    "financial_planning",
    "other",
    "portfolio_management_businesses_institutional",
    "portfolio_management_individuals"
  ],
  "wrap_fee_participant": false,
  "disclosure_yes_count": 0,
  "states_registered": [
    "AL",
    "AR",
    "AZ",
    "CA",
    "CO",
    "CT",
    "DC",
    "DE",
    "FL",
    "GA",
    "HI",
    "IA",
    "IL",
    "IN",
    "KY",
    "LA",
    "MA",
    "MD",
    "ME",
    "MI",
    "MN",
    "MO",
    "MT",
    "NC",
    "ND",
    "NH",
    "NJ",
    "NM",
    "NV",
    "NY",
    "OH",
    "OR",
    "PA",
    "RI",
    "SC",
    "TN",
    "TX",
    "UT",
    "VA",
    "VT",
    "WA",
    "WV"
  ],
  "websites": [
    "https://facebook.com/MainStreetResearch",
    "https://instagram.com/mainstreetresearch",
    "https://linkedin.com/COMPANY/main-street-research",
    "https://ms-research.com",
    "https://twitter.com/MAINSTREETRIA",
    "https://youtube.com/channel/UCAhWEuanmTs_6WEQgbPDq0g"
  ],
  "iapd_url": "https://adviserinfo.sec.gov/firm/summary/114629",
  "city_as_filed": "LAKEVILLE",
  "url": "https://advisorcensus.com/firm/main-street-research-llc-lakeville-ct-114629",
  "display_name": "Main Street Research LLC",
  "summary": "Main Street Research LLC is an SEC-registered investment advisory firm in Lakeville, CT, registered since 2000, reporting $1 billion to $5 billion in regulatory assets under management in its Form ADV filing dated April 27, 2026.",
  "citation": "AdvisorCensus. Main Street Research LLC (CRD 114629): Form ADV filing data as of October 2026.",
  "registration_type_label": "SEC-registered investment adviser",
  "compensation_labels": [
    "A percentage of assets under your management",
    "Performance-based fees"
  ],
  "advisory_activity_labels": [
    "Financial planning services",
    "Portfolio management for individuals and/or small businesses",
    "Portfolio management for businesses (other than small businesses) or institutional clients",
    "Educational seminars/workshops",
    "Other"
  ],
  "quick_answers": [
    {
      "q": "How is Main Street Research LLC compensated?",
      "a": "On its Form ADV (Item 5.E, October 2026), Main Street Research LLC reports these compensation arrangements: a percentage of assets under its management; performance-based fees."
    },
    {
      "q": "Where is Main Street Research LLC located?",
      "a": "Main Street Research LLC's principal office is in Lakeville, CT, according to its Form ADV; the May 2026 filing also lists 4 other offices (Schedule D, Section 1.F)."
    },
    {
      "q": "Is Main Street Research LLC registered with the SEC or a state?",
      "a": "Main Street Research LLC is an SEC-registered investment advisory firm, registered since 2000. Status as filed: Approved. CRD 114629."
    },
    {
      "q": "How much does Main Street Research LLC manage?",
      "a": "Main Street Research LLC reports $2,681,886,634 in regulatory assets under management in its Form ADV filing dated April 27, 2026 (100% discretionary)."
    },
    {
      "q": "How have Main Street Research LLC's assets and staff changed since 2021?",
      "a": "In the Form ADV data for Main Street Research LLC: Regulatory assets under management: $1,389,974,082 in the October 2021 data and $2,681,886,634 in the October 2026 data, up 93%. Total employees: 13 in October 2021 and 24 in October 2026. Assets under management move with markets as well as with clients coming and going."
    },
    {
      "q": "What types of clients does Main Street Research LLC serve?",
      "a": "By number of clients on Form ADV Item 5.D: high net worth individuals (815); individuals (other than high net worth individuals) (203); pension and profit sharing plans (but not the plan participants or government pension plans) (8)."
    },
    {
      "q": "Which custodians does Main Street Research LLC use?",
      "a": "Main Street Research LLC's most recent Form ADV filing (Schedule D, Section 5.K(3)) lists Charles Schwab & Co., Inc. as a custodian holding 10% or more of its separately managed account assets."
    },
    {
      "q": "Does Main Street Research LLC report any disciplinary disclosures?",
      "a": "Reports no disclosure items on Form ADV Item 11. The detail of any item is on the firm's SEC record: https://adviserinfo.sec.gov/firm/summary/114629"
    },
    {
      "q": "What changed in Main Street Research LLC's recent Form ADV filings?",
      "a": "In the April 2026 filing data: Regulatory assets under management went from $2,384,657,948 to $2,681,886,634 (+12%). Updated its list of owners and control persons (Schedule A)."
    }
  ],
  "filing_history": [
    {
      "period": "2021-10-01",
      "regulatory_assets_under_management": 1389974082.0,
      "total_employees": 13,
      "filing_date": "2021-09-28"
    },
    {
      "period": "2022-10-01",
      "regulatory_assets_under_management": 1963324024.0,
      "total_employees": 22,
      "filing_date": "2022-06-08"
    },
    {
      "period": "2023-10-01",
      "regulatory_assets_under_management": 1674891277.0,
      "total_employees": 23,
      "filing_date": "2023-04-25"
    },
    {
      "period": "2024-10-01",
      "regulatory_assets_under_management": 1816608726.0,
      "total_employees": 21,
      "filing_date": "2024-08-21"
    },
    {
      "period": "2025-10-01",
      "regulatory_assets_under_management": 2384657948.0,
      "total_employees": 24,
      "filing_date": "2025-03-25"
    },
    {
      "period": "2026-10-01",
      "regulatory_assets_under_management": 2681886634.0,
      "total_employees": 24,
      "filing_date": "2026-04-27"
    }
  ],
  "recent_changes": [
    {
      "period": "2026-04-01",
      "period_label": "April 2026",
      "notes": [
        "Regulatory assets under management went from $2,384,657,948 to $2,681,886,634 (+12%).",
        "Updated its list of owners and control persons (Schedule A)."
      ]
    }
  ],
  "fees_from_brochure": {
    "source": "Form ADV Part 2A brochure dated March 31, 2026",
    "provided_by_the_firm": false,
    "tiers": [],
    "flat_rate": null,
    "stated_range": null,
    "stated_maximum": null,
    "account_minimum": null,
    "account_minimum_may_be_waived": false,
    "minimum_annual_fee": "None",
    "planning_fees": [],
    "figures": [
      {
        "label": "Minimum annual fee",
        "statements": [
          "Minimum annual fee: None"
        ],
        "quotes": [
          "Further, there are no minimum fee requirements."
        ]
      }
    ],
    "values": {
      "tiers": [],
      "range_pct": null,
      "max_pct": null,
      "account_minimum": null,
      "minimum_annual_fee": 0.0,
      "planning": []
    },
    "quotes": [
      "Further, there are no minimum fee requirements."
    ],
    "note": "As stated in the firm's brochure; fees can differ by service and may be negotiable."
  },
  "custodians": [
    {
      "name": "Charles Schwab & Co., Inc.",
      "name_as_filed": "CHARLES SCHWAB & CO., INC.",
      "affiliated": false
    }
  ],
  "custodians_note": "Custodians holding 10% or more of the firm's separately managed account assets, as filed on Form ADV (Schedule D, Section 5.K(3)). A custodian holds client assets; it does not endorse or supervise the firm. AdvisorCensus has no relationship with any custodian.",
  "markdown_url": "https://advisorcensus.com/firm/main-street-research-llc-lakeville-ct-114629.md",
  "clients": [
    {
      "type": "individuals",
      "label": "Individuals (other than high net worth individuals)",
      "count": 203,
      "fewer_than_5": false,
      "raum": 67948537.0
    },
    {
      "type": "high_net_worth_individuals",
      "label": "High net worth individuals",
      "count": 815,
      "fewer_than_5": false,
      "raum": 2553138019.0
    },
    {
      "type": "pension_profit_sharing",
      "label": "Pension and profit sharing plans (but not the plan participants or government pension plans)",
      "count": 8,
      "fewer_than_5": false,
      "raum": 16948381.0
    },
    {
      "type": "charitable",
      "label": "Charitable organizations",
      "count": 5,
      "fewer_than_5": false,
      "raum": 43851697.0
    }
  ],
  "disclosure_line": "Reports no disclosure items on Form ADV Item 11.",
  "disclosure_items": [],
  "indexable": true,
  "suppressed": false,
  "claimed": false,
  "enhanced": false,
  "provided_by_the_firm": null,
  "source": {
    "name": "Form ADV",
    "as_of": "2026-10-01",
    "iapd_url": "https://adviserinfo.sec.gov/firm/summary/114629",
    "operator": "BH Monitor Services, LLC",
    "license": "https://creativecommons.org/licenses/by/4.0/",
    "credit": "AdvisorCensus (advisorcensus.com), from SEC Form ADV data"
  }
}