Harrison Henderson

What Harrison Henderson does

Harrison Henderson is a full-service CPA firm headquartered in Tulsa, Oklahoma, founded in 1986. The firm delivers tax planning, bookkeeping, auditing, accounting, and business consulting services to Oklahoma-based businesses and individuals. Revenue is generated through professional-services engagements, typically billed on hourly rates or fixed fees, with no publicly disclosed pricing or proprietary technology platform supporting delivery. The firm's go-to-market relies on professional referrals, local business networking, and direct client engagement delivered by qualified CPAs, with services consumed regionally within Oklahoma.

In January 2026, Harrison Henderson merged with SSC CPAs + Advisors, a Topeka, Kansas-based employee-owned CPA firm. The merger combined two employee-owned firms, expanding SSC's Oklahoma presence through Harrison Henderson's existing Tulsa operations alongside SSC's prior Oklahoma offices in Norman and Perry. Deal terms were not disclosed. Following the transaction, Harrison Henderson's employees transitioned into SSC's broader employee ownership structure, and the firm became a unit of SSC's multi-state platform spanning Kansas and Oklahoma offices with added service lines including ESOP advisory, succession planning, wealth management, and estate/charitable giving strategy.

The underlying operating model is relationship-driven, partner-led, and labor-intensive, with no disclosed AI/ML, automation, or SaaS delivery layer. Distribution is direct-to-client through CPA professionals rather than through digital channels, and customer acquisition is sourced from referral networks and local professional associations typical of regional public accounting firms.

Name

Harrison Henderson

Legal name

Harrison Henderson PLLC

Website

https://hhpllc-cpas.com

Company type

Private

Founded year

1986

Operating status

Acquired

Headcount range

11–50 employees

Short description

Harrison Henderson is a Tulsa, Oklahoma-based full-service CPA firm providing tax, audit, accounting, and business consulting services to Oklahoma businesses and individuals. Founded in 1986, it merged with SSC CPAs + Advisors in January 2026.

Ownership category

akta.pro rank

Headquarters

HQ city

Tulsa

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

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

Revenue model

1. Public Accounting Services: Harrison Henderson PLLC generates revenue through professional accounting services including tax preparation, audit services, accounting, and financial advisory. As a public accounting firm, revenue is derived from client engagements typically billed on hourly rates or fixed fees for specific services.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels2 records

Core offering

Harrison Henderson PLLC is a full-service public accounting firm providing tax preparation and planning, audit and assurance, accounting/bookkeeping, and business advisory services to businesses and individuals in Oklahoma. As an employee-owned CPA firm, it delivers professional accounting engagements through qualified CPAs and operates as part of SSC CPAs + Advisors following the January 2026 merger, expanding access to succession planning, ESOP advisory, retirement planning, and wealth management resources.

Differentiator

Problem solved

Functional benefit

Products and services

• Business Tax Preparation and Planning Proactive tax strategy and preparation services for Oklahoma businesses, designed to reduce tax liabilities, increase returns, and support sustainable growth. For business owners and operating companies needing year-round tax planning and compliance.
• Business Accounting and Bookkeeping Outsourced accounting and bookkeeping that turns financial data into clear, actionable insight, saving business owners time and surfacing operational and financial insights. For Oklahoma business owners needing day-to-day financial recordkeeping and reporting.
• Audit and Assurance Services Industry-aware audit engagements delivered with employee continuity to minimize disruption and avoid retraining auditors, aimed at keeping audits efficient and on track. For Oklahoma businesses requiring audit preparation and assurance services.
• Business Financial Planning Strategic financial planning for business owners that aligns financial decisions with ambitious goals and delivers a clear blueprint for measurable results. For business owners pursuing growth, profitability, and long-term financial independence.
• Business Succession Planning Proactive wealth transfer and succession planning strategies that help owners tackle tough transition questions now to ensure the business thrives across generations. For business owners planning ownership or leadership transitions.
• ESOP Advisory Services ESOP design and advisory services drawing on the firm's own employee-ownership experience to help clients build employee-centric business models that drive loyalty, empower teams, and support long-term sustainability. For business owners considering employee ownership transitions.
• Personal Tax Preparation and Planning Proactive personal tax preparation and planning that reduces tax burden, increases returns, and positions individuals for smarter financial decisions. For Oklahoma individuals and households needing annual and year-round tax support.
• Wealth Management Services Personalized wealth management advice delivered in partnership with Merit Financial Advisors to help individuals safeguard and grow assets with clear, goal-aligned strategies. For Oklahoma individuals and families seeking investment and wealth advisory support.
• Retirement Planning Services People-first retirement strategies that shrink risk, maximize growth, and give individuals confidence in a secure, self-directed retirement. For individuals planning for retirement income and legacy.
• Estate and Charitable Giving Strategies Estate tax planning, trust creation strategies, and charitable giving structures that maximize tax benefits and create a lasting legacy. For individuals and families planning multi-generational wealth transfer and philanthropy.

Segments1 record

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

One partnership is on record.

• SSC CPAs + AdvisorsflagshipStrategic or Co-development Partner · 7 January 2026Harrison Henderson PLLC has merged with SSC CPAs + Advisors, a Topeka, KS-based employee-owned CPA firm. The merger combines two employee-owned CPA firms, expanding SSC's presence in Oklahoma while offering Harrison Henderson's employees a transition to broader employee ownership structures. The deal terms were not disclosed, and the merger is framed as aligning shared values and vision for future success with enhanced service delivery and market expansion as key benefits.

Scale indicators1 record

Recent moves3 records

Expansion highlights3 records

Broad incumbents

• Wipfli: Top-25 U.S. accounting and advisory firm with growing presence in the central U.S. Comparable full-service model for mid-market businesses, including succession and ESOP advisory.
• RSM US: Leading U.S. middle-market accounting firm competing for the same privately-held business clients in Oklahoma with comparable audit, tax, and consulting service lines.
• Grant Thornton: Top-7 U.S. accounting firm with audit, tax, and advisory services targeting middle-market and enterprise clients — comparable for Oklahoma-based businesses that scale beyond regional CPA capacity.
• FORVIS (formerly BKD): Top-10 U.S. accounting firm with significant Oklahoma presence offering audit, tax, and advisory services. Comparable as a competitor for mid-market and enterprise clients in the same Oklahoma geography.
• Eide Bailly: Large regional CPA firm with offices across the Midwest and Plains states including Oklahoma. Comparable service breadth (tax, audit, advisory) targeting similar privately-held business clients.
• BDO USA: Global accounting network with substantial U.S. middle-market practice. Competes for the same Oklahoma-based privately-held business clients seeking audit, tax, and advisory services.

Direct peers

• SSC CPAs + Advisors: Employee-owned full-service CPA firm headquartered in Topeka, KS, with established Oklahoma offices in Tulsa, Norman, and Perry. Direct peer given Harrison Henderson was merged into this firm in January 2026, offering identical service lines (tax, audit, accounting, financial planning, succession, ESOP).
• HoganTaylor LLP: Oklahoma-based full-service CPA and business advisory firm serving closely comparable business and individual clients across the Tulsa and Oklahoma City markets with overlapping tax, audit, and advisory offerings.
• Anders CPAs + Advisors: Mid-sized regional CPA and advisory firm serving businesses and individuals with tax, audit, wealth management, and consulting services — comparable employee-centric, full-service positioning to Harrison Henderson/SSC.

Emerging players

• Merit Financial Advisors: Wealth management partner of SSC CPAs + Advisors delivering the SSC Wealth offering. Comparable as an adjacent financial-services peer within SSC's broader ecosystem serving individual clients of the combined firm.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat3 records

Key risks5 records

Key highlights5 records

Customer concentration

• Xx.com/HHPLLCCPA
• LinkedInlinkedin.com/company/harrison-henderson-pllc

Revenue estimate

Valuation estimate

Number of profiles

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 Harrison Henderson