Grimbleby Coleman Certified Public Accountants

What Grimbleby Coleman Certified Public Accountants does

Grimbleby Coleman operates on a professional services revenue model with engagement-based, quote-based pricing rather than publicly disclosed rate cards, structured around multi-year client relationships. Go-to-market is sales-led and referral-driven, supported by community involvement, content marketing (blog, email newsletter), organic social presence (LinkedIn, Facebook, YouTube), and BDO Alliance USA cross-referrals — there is no self-serve or PLG motion. The firm monetizes through billable professional hours and fixed-fee engagements across tax, audit, advisory, accounting, estates & trusts, and affiliated wealth management, targeting SMB and mid-market clients in Agriculture and Construction & Real Estate within California's Central Valley. Customer acquisition relies on long-term relationship compounding, multigenerational client retention, and the BDO Alliance referral network, with a 93% client referral willingness rate disclosed by the firm.

Name

Grimbleby Coleman Certified Public Accountants

Legal name

Grimbleby Coleman CPAs, Inc.

Website

https://grimbleby-coleman.com

Company type

Private

Founded year

1973

Operating status

Operating

Headcount range

101–250 employees

Short description

Grimbleby Coleman is a family-owned CPA and advisory firm in Modesto, California, founded in 1973, serving SMB and mid-market clients in the Central Valley across six service lines, with deep vertical specialization in agriculture and construction & real estate.

Ownership category

akta.pro rank

Product category

Public Accounting and Advisory Services

NAICS

Portfolio Management and Investment Advice (523940)

SIC

Finance Services (6199)

akta.pro primary industry

Outsourced Finance & CFO Services (BPAHABAE)

akta.pro secondary industry

Financial Planning & Analysis Support (Budgeting, Forecasting, Management Reporting) (BPAAAGAJ)

Keywords

• Public accounting services
• Tax preparation services
• Business advisory consulting
• Audit and assurance
• Estate planning services

Headquarters

HQ city

Modesto

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Tax Services: Tax preparation, planning, and representation before tax authorities including federal, state and local tax matters
2. Audit & Assurance: Financial statement audits, reviews, compilations, and employee benefit plan audits
3. Client Accounting Services: Managed accounting services, financial statement preparation, outsourced CFO/Controller support, and accounting software implementations
4. Business Advisory: Strategic advisory services including profit improvement planning, business valuations, exit strategies, team coaching, and workshops
5. Estates & Trusts: Estate planning, trust services, succession planning, and fiduciary tax return preparation
6. Wealth Management: Wealth management services through affiliated entity gcwealth.net

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels7 records

Core offering

Grimbleby Coleman is a full-service certified public accounting and business advisory firm delivering tax preparation and planning, audit and assurance, client accounting (including outsourced CFO/Controller support), business advisory (valuations, exit strategies, succession planning), estates and trusts services, and wealth management through an affiliated entity. The firm is structured around six core service lines with specialized practices for agriculture and construction/real estate clients in California's Central Valley.

Product overview

Grimbleby Coleman Advisors & Accountants operates as a full-service accounting and business advisory firm offering a unified portfolio of six interconnected service lines: Business Advisory, Tax Services, Client Accounting, Audit & Assurance, Estates & Trusts, and Wealth Management. The firm specializes in two primary industries—Agriculture and Construction & Real Estate—providing specialized expertise in tax and accounting for these sectors. Services range from day-to-day bookkeeping and financial statement preparation to strategic planning, succession planning, and complex tax representation. The model allows clients to access comprehensive financial services through a single partnership, with offerings scaled to individual needs and growth stages.

Differentiator

Problem solved

Functional benefit

Products and services

• Business Advisory Services Strategic consulting including profit improvement planning, business valuations, exit and acquisition strategies, team coaching, and business workshops for business owners and operators.
• Tax Services Comprehensive tax planning and preparation including entity selection analysis, cryptocurrency tax planning, tax credit analysis, estate and trust tax preparation, and representation before federal, state and local tax authorities.
• Client Accounting Services Managed accounting solutions including financial statement preparation, bank reconciliations, outsourced CFO/Controller/Accounting Manager support, and cloud-based accounting system setup and management.
• Audit and Assurance Financial statement assurance including audited, reviewed, and compiled financial statements, plus employee benefit plan (EBP) audits for 401(k) plans and similar retirement arrangements through AICPA Employee Benefit Plan Audit Quality Coalition membership.
• Estates and Trusts Estate and trust planning services including fiduciary income tax return preparation, succession planning, charitable trusts, and gift/estate tax planning for multigenerational families and business owners.
• Wealth Management Wealth management and financial planning services delivered through a separate affiliated entity, gcwealth.net.
• Agriculture Industry Services Specialized accounting and advisory for agribusiness including tree, vine, and row crop operations, transition planning, IC-DISC, like-kind exchanges, and entity selection for local farming families, corporate farming entities, processors, investors, and agricultural service providers.
• Construction and Real Estate Services Industry-specific accounting and advisory for real estate brokers, developers, general contractors, and specialty subcontractors, including business advisory, accounting services and training, financial statement preparation and reviews/audits, and support for client/banker/bonding agent relationships.

Quantifiable outcome

• 93% of clients say they would recommend the firm to a friend or colleague
• +4 more outcomes

Named customers3 records

Segments2 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration4 records

Feature3 records

Partnerships

One partnership is on record.

• BDO Alliance USAcoreStrategic or Co-development PartnerIndependent member of BDO Alliance USA, a nationwide association of independently owned accounting, consulting and service firms. The alliance allows the firm to enhance client services, broaden capabilities, expand domestic and international coverage, gain technical knowledge in specialty areas, access up-to-date technical information, participate in training programs, and connect with sophisticated professionals throughout the U.S.

Scale indicators9 records

Recent moves8 records

Expansion highlights5 records

Direct peers

• Moss Adams LLP: Top-15 US accounting and business advisory firm with a Pacific Northwest and West Coast regional footprint. Directly comparable full-service CPA offerings (tax, audit, advisory, wealth management) and overlap with agribusiness and construction industry specialization.
• Eide Bailly LLP: Top-20 US CPA and advisory firm with comparable service lines (tax, audit, outsourced accounting, business advisory) and regional office model. Both firms compete for mid-market and family-owned business clients with industry specialization.
• Wipfli LLP: Top-20 US accounting firm with comparable service mix spanning tax, audit, outsourced accounting (CFO/Controller support), and industry-specific advisory. Similar mid-market and SMB focus with regional office strategy.
• Plante Moran PLLC: Top-15 US CPA firm with similar full-service offerings and strong construction and real estate industry practices. Comparable firm size range and regional concentration model make it a direct functional peer.
• Aldrich Group: West Coast-based accounting, tax, and advisory firm with comparable service lines and industry specialization. Closely matched in size and positioning as a regional full-service CPA firm serving owner-operated businesses.
• BPM LLP: California-headquartered full-service CPA and advisory firm with comparable tax, audit, and outsourced accounting offerings. Both firms target middle-market and family-owned clients with industry-tailored services.

Broad incumbents

• CliftonLarsonAllen (CLA): Top-10 US accounting firm offering comprehensive tax, audit, advisory, and wealth management services. While much larger in scale, CLA's outsourced accounting and industry-focused service lines directly overlap with Grimbleby Coleman's core offerings.
• BDO USA: Top-5 global accounting network and the parent alliance relationship for Grimbleby Coleman. Directly comparable full-service CPA offerings at national scale; relevant as both a referral partner and competitive incumbent in mid-market audit/tax work.
• RSM US LLP: Top-5 US accounting firm serving middle-market clients with tax, audit, and consulting services. Comparable mid-market positioning with similar industry-aligned service offerings to family-owned and owner-operated businesses.

Regional players

• Burr Pilger Mayer (BPM): California-based full-service CPA firm serving similar West Coast mid-market and family-business clients. Overlapping regional footprint and comparable service line mix makes it a relevant geography-adjacent peer.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/channel/UCu5AovttEidKYaPf1Bkop_A
• Facebookfacebook.com/gccpas
• LinkedInlinkedin.com/company/1015903

Revenue estimate

Valuation estimate

Number of profiles

Profiles12 records

Subsidiaries1 record

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 Grimbleby Coleman Certified Public Accountants