Plimoth Investment Advisors

What Plimoth Investment Advisors does

Plimoth Investment Advisors is a privately held, fee-based investment management and trust services firm headquartered in Plymouth, Massachusetts, with additional offices in Swansea, Massachusetts and Stonington, Connecticut. Wholly owned by community savings bank BayCoast Bank, the firm serves individuals, families, businesses, foundations, endowments, and corporations across Massachusetts and Connecticut, operating through a dedicated two-person client team model (an Investment Officer paired with a Wealth Management Officer). Its product set spans customized discretionary portfolio management built around five primary strategies (Income, Income with Growth, Balanced, Growth and Income, and Growth), traditional and Roth IRAs, rollover IRAs, trust accounts, charitable/endowment/foundation/corporate accounts, employee benefit plans (3(38) and 3(21) fiduciary services), defined benefit plan management, and estate administration, supplemented by a free Complimentary Personal Retirement Plan as a top-of-funnel acquisition offering.

The firm's investment platform is built on a top-down fundamental approach supported by internally developed quantitative tools: an Internal Equity Model that scores stocks across 35 data points in five categories (Financial Strength, Profitability, Earnings/Revenue Growth, Cash Flow Strength, and Valuation), a Fixed Income Valuation Model that screens bond yields by maturity and sector, proprietary economic and investment analytics programs described as the backbone of its decision platform, and Bloomberg screening used to construct an Equity Investment Universe of roughly 1,200 securities. Qualitative review is augmented by third-party research from CFRA Research and Morningstar.

The revenue model is fee-based across three streams — investment management fees (no commissions, no 12b-1 fees), trust and fiduciary services (acting as sole, co-, or successor trustee, trust administration, estate settlement, tax reporting), and retirement plan services for businesses — generating recurring, AUM-driven revenue. Go-to-market is primarily direct and relationship-led: in-person and at-home consultations, on-site employer enrollment meetings, plus content-led marketing via weekly and monthly market commentary newsletters, "On the Air" webinars, WPLM 99.1 FM radio appearances, financial calculators, and an annual Economic Breakfast. Distribution is regional, with on-platform access through TrustReporter and go-retire.com portals. Leadership in 2025 comprises Steven A. Russo (Chairman), Louis E. Sousa (President & CEO, former CIO), Mark J. Gendreau (CIO), and Patrick Lynch (Director of Research).

Name

Plimoth Investment Advisors

Legal name

Plimoth Investment Advisors

Website

https://plimothinvestmentadvisors.com

Company type

Private

Operating status

Operating

Headcount range

11–50 employees

Short description

Plimoth Investment Advisors is a fee-based investment management and trust services firm in Massachusetts and Connecticut, serving individuals, families, businesses, foundations, and endowments with proprietary quantitative portfolio strategies, retirement plan administration, and fiduciary services. It operates as a wholly owned subsidiary of BayCoast Bank.

Ownership category

akta.pro rank

Product category

Investment Management & Wealth Advisory

NAICS

Portfolio Management and Investment Advice (523940), Trusts, Estates, and Agency Accounts (525920), Trust, Fiduciary, and Custody Activities (523991)

SIC

Investment Advice (6282)

akta.pro primary industry

Comprehensive/Full-Service RIAs & Independent Wealth Managers (FSAAACAA)

akta.pro secondary industries

Portfolio Management–Led RIAs (Discretionary/Model-Based) (FSAAACAC), Fiduciary Investment Management (Trust Portfolios) (FSAEAKAI)

Keywords

• Investment management services
• Trust and fiduciary services
• Retirement plan administration
• Wealth management advisory
• Estate administration services

Headquarters

HQ city

Plymouth

HQ country

United States

HQ region

North America

Offices3 records

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Technology or R&D, Infrastructure

Revenue model

1. Investment Management Fees: Fee-based investment management services for both private and institutional clients. The firm explicitly states it does not receive commissions on products or take 12b-1 fees for any investments selected for client plans.
2. Fiduciary Services: Trust and fiduciary services including trustee services, trust administration, estate settlement, tax reporting, and trust accounting for individuals, families, foundations, endowments, and corporations.
3. Retirement Plan Services: Comprehensive retirement plan services for businesses including plan setup, administration, investment selection, fiduciary oversight, and employee education. Services available to businesses of all sizes.

Pricing tiers

Go-to-market motion2 records

Distribution channels4 records

Marketing channels7 records

Core offering

Plimoth Investment Advisors provides fee-based discretionary investment management for private and institutional clients through five primary portfolio strategies (Income, Income with Growth, Balanced, Growth and Income, and Growth) that can be blended to client needs. The firm complements portfolio management with trust and fiduciary services (acting as sole, co-trustee, or successor trustee), retirement plan administration including 3(38) and 3(21) fiduciary services, and estate administration. Accounts offered include Individual Investment Accounts, Traditional/Roth/Rollover IRAs, Trust Accounts, plus institutional Charitable, Endowment, Foundation, and Corporate Accounts.

Product overview

Plimoth Investment Advisors offers a comprehensive suite of investment management and trust services through a personalized, client-centric approach. The core offering centers on customized, disciplined investment management with five primary portfolio strategies (Income, Income with Growth, Balanced, Growth and Income, and Growth) that can be blended for individual needs. The firm provides a full range of account types including Individual Investment Accounts, Traditional/Roth/Rollover IRAs, and Trust Accounts for private clients, plus Employee Benefit Plans, Charitable Accounts, Endowment Accounts, Foundation Accounts, and Corporate Accounts for institutional clients. Complementary services include Trust and Fiduciary Services (acting as sole, co-trustee, or successor trustee), Estate Administration, and a Complimentary Personal Retirement Plan for new clients. The firm also offers specialized Defined Benefit Plan management for pension assets.

Differentiator

Problem solved

Functional benefit

Products and services

• Investment Management
• Trust and Fiduciary Services
• Employee Benefit Plan Services
• Estate Administration
• Complimentary Personal Retirement Plan
• Defined Benefit Plan Management
• Individual Investment Accounts (Taxable)
• Traditional IRA
• Roth IRA
• Rollover IRA
• Trust Accounts
• Charitable Accounts
• Endowment Accounts
• Foundation Accounts
• Corporate Accounts

Quantifiable outcome

• High-quality bias in investments designed to reduce portfolio risk while providing superior long-term performance

Named customers3 records

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Two partnerships are on record, tiered minor.

• BayCoast InsuranceminorOthersAffiliate company under the BayCoast Bank umbrella, providing insurance services. Listed as a related entity on the BayCoast Bank family of companies page.
• BayCoast MortgageminorOthersAffiliate company under the BayCoast Bank umbrella, providing mortgage services. Listed as a related entity on the BayCoast Bank family of companies page.

Scale indicators3 records

Recent moves8 records

Expansion highlights6 records

Broad incumbents

• Bessemer Trust: Large national multifamily office providing investment management, trust and estate administration, and family office services for ultra-HNW families — broader incumbent in the same comprehensive wealth and fiduciary space Plimoth serves.
• Northern Trust Wealth Management: Large global wealth manager with a deep institutional/foundation and family office practice, including trust and fiduciary services — broader incumbent that competes for the same institutional and trust clients at scale.
• Commonwealth Financial Network: Large independent broker-dealer and RIA platform supporting thousands of financial advisors — broader incumbent providing investment management, retirement plan, and advisory services to the same HNW and business-owner segments.
• BNY Mellon Wealth Management: Global wealth manager offering investment management, trust and estate services, and private banking. Operates nationally with a strong institutional/foundation practice — broader incumbent that competes for the same endowment, foundation, and HNW clients.

Direct peers

• The Colony Group: Multi-family office and RIA offering integrated investment management, tax planning, and fiduciary/trust services to HNW individuals and institutions in New England and beyond — comparable full-service fee-only wealth platform.
• Cambridge Trust Wealth Management: Wealth management arm of Cambridge Bancorp (formerly Cambridge Trust Company), serving private and institutional clients across New England with comprehensive investment management, trust, and fiduciary services — directly comparable bank-affiliated RIA model in the same geography.
• Winthrop Wealth Management: Multi-family office and RIA serving HNW individuals and families with discretionary portfolio management, financial planning, and trust services. Closely comparable comprehensive wealth model with a fee-only fiduciary structure.
• Rockland Trust Wealth Management: Wealth management division of Rockland Trust (independent community bank), offering investment management, trust services, and retirement plan administration — almost identical bank-affiliated wealth model to Plimoth, with overlap in southeastern Massachusetts.
• Boston Trust Walden: Independent, employee-owned RIA and trust company serving foundations, endowments, retirement plans, and HNW families — direct competitor in institutional portfolio management and fiduciary services in the New England market.

Regional players

• Welch & Forbes: Boston-based independent investment counsel firm offering discretionary portfolio management and trust services to HNW individuals, families, and institutions — comparable fee-only fiduciary model in the broader New England market.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights6 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles11 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Plimoth Investment Advisors