WilliamsMarston
WilliamsMarston is a Boston-headquartered, PE-backed national advisory firm providing accounting, tax, technology, transaction, and valuation services to pre-IPO, public, and private equity-backed companies across the United States.
- Company typePrivate
- Founded2014
- HeadquartersBoston, United States
- Headcount251–500
- GTM typeB2B
- OfferingServices
What WilliamsMarston does
WilliamsMarston LLC is a US national professional services firm founded in 2014 and headquartered in Boston, providing accounting, tax, technology, transaction, and valuation advisory services to pre-IPO, public, and private equity-backed companies. The firm operates across 10 US cities and employs 250+ professionals serving more than 1,500 client relationships, typically companies with revenues from $200M to $10B+. Its service portfolio is organized into five core lines: Accounting Advisory (technical accounting, IPO readiness, M&A, FP&A, forensic accounting, interim management), Tax (income tax accounting, consulting, compliance for multi-jurisdictional clients), Technology Advisory (data automation and the OneStream Practice for corporate performance management), Transaction Advisory (buy-side and sell-side financial and tax due diligence), and Valuation (purchase price allocation, goodwill impairment, 409A, complex instruments, litigation, fairness and solvency opinions). WilliamsMarston is not a public accounting firm and does not perform attest or audit services.
The business is structured as a PE-backed roll-up platform owned by Align Capital Partners, having executed six acquisitions since 2020, including Chord Advisors (2021), Bay Valuation Advisors (2022), Oracle Capital (2022), Paradigm (2022), and AIT Consulting (2025). These acquisitions have anchored the firm's regional structure (Northeast, Southeast, South, West, Southwest), the national valuation practice, and the OneStream technology practice. The firm also offers a recurring-revenue-adjacent Finance as a Service line targeting high-growth and early-stage companies with outsourced finance and accounting leadership.
WilliamsMarston's go-to-market is partner-led, relationship-driven, and content-supported, with senior partners directly engaging C-suite and finance leaders at target companies. The firm monetizes through custom-scoped, project-based professional services fees rather than software subscriptions or usage-based pricing, and does not disclose publicly its pricing or revenue. Its competitive positioning rests on Big Four-caliber technical expertise delivered with senior-level involvement on every engagement, reinforced by a Strategic Advisory Board that includes a former FASB Vice Chairman, a former SEC Chief Accountant, and retired partners from EY, Deloitte, and Google. Marketing channels center on thought leadership (WM Insights, The Transformational CFO podcast), industry conferences (SuperReturn, Life Sciences Congress), and PE sponsor and audit firm referrals.
WilliamsMarston firmographics
Firmographics- Name
- WilliamsMarston
- Legal name
- WilliamsMarston LLC
- Website
- https://williamsmarston.com
- Company type
- Private
- Founded year
- 2014
- Operating status
- Operating
- Headcount range
- 251–500 employees
- Short description
- WilliamsMarston is a Boston-headquartered, PE-backed national advisory firm providing accounting, tax, technology, transaction, and valuation services to pre-IPO, public, and private equity-backed companies across the United States.
- Ownership category
- akta.pro rank
WilliamsMarston industry classification
Industry- Product category
- Accounting Advisory Services
- NAICS
- Other Accounting Services (541219), Management Consulting Services (54161)
- SIC
- Services-Management Services (8741)
- akta.pro primary industry
- Financial Reporting & Technical Accounting Advisory (GAAP/IFRS) (BPAHABAF)
- akta.pro secondary industries
- Corporate Development & Strategic Partnerships Advisory (JVs, Alliances, Carve-outs) (BPAHAOAG), Fairness Opinions & Independent Board Advice (FSAEAGAF), Risk, Compliance & Internal Controls Consulting (BPAHACAJ)
Keywords
Where WilliamsMarston is headquartered
LocationHeadquarters
- HQ city
- Boston
- HQ country
- United States
- HQ region
- North America
Offices10 records
Markets served
WilliamsMarston business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure
Revenue model
- Accounting Advisory Services: Professional advisory fees for technical accounting, IPO readiness, M&A advisory, finance effectiveness, FP&A, forensic accounting, and interim management services for pre-IPO, public, and private equity-backed companies.
- Tax Advisory Services: Corporate income tax accounting, tax consulting, and tax compliance services for complex multi-jurisdictional clients.
- Transaction Advisory Services: Financial and tax due diligence services supporting M&A transactions, divestitures, and recapitalizations.
- Valuation Services: Valuation advisory for financial reporting, tax reporting, litigation support, and transaction purposes including purchase price allocations, goodwill impairments, and 409A valuations.
- Technology Advisory Services: Data automation, advisory solutions, and OneStream corporate performance management implementation services.
Go-to-market motion1 record
Distribution channels2 records
Marketing channels5 records
WilliamsMarston product offering
Product offeringCore offering
WilliamsMarston is a national advisory firm providing professional services across five core lines: accounting advisory (M&A, IPO readiness, technical accounting, FP&A, forensic accounting), tax (income tax accounting, consulting, compliance), technology advisory (OneStream implementation, data automation), transaction advisory (financial and tax due diligence), and valuation (purchase price allocation, impairments, 409A, fairness opinions, litigation support). The firm serves pre-IPO, public, and private equity-backed companies with senior-level, partner-led engagement.
Product overview
WilliamsMarston is a national accounting, tax, technology, transaction and valuation advisory firm that provides a comprehensive suite of professional services rather than a unified software product. The firm operates through five core service lines: Accounting Advisory (covering M&A, IPOs, technical accounting, FP&A, and forensic accounting), Tax Services (income tax accounting, consulting, and compliance), Technology Advisory (including Data Automation and OneStream Practice for corporate performance management), Transaction Advisory (financial and tax due diligence), and Valuation Services (purchase price allocation, impairments, litigation support, and fairness opinions). Additionally, the firm offers specialized Finance as a Service for early-stage companies. WilliamsMarston is not a public accounting firm and does not perform attest, review, or compilation services.
Differentiator
Problem solved
Functional benefit
Products and services
- Accounting Advisory
- Tax Services Corporate tax services including income tax accounting, tax consulting, and tax compliance for domestic and international clients, with focus on multi-jurisdictional complexity.
- Transaction Advisory Services Transaction-related advisory including financial due diligence and tax due diligence for acquisitions, divestitures, and capital markets transactions.
- Valuation Services Comprehensive valuation services including purchase price allocation, asset impairments, share-based payments, complex financial instruments, tax valuation, litigation and dispute, Stark Law, PE/VC valuations, fairness and solvency opinions, and real estate valuation.
- OneStream Practice OneStream software implementation and consulting services for enterprise and private equity-backed clients, including consolidation, planning, and reporting environments.
- Data Automation and Advisory Solutions Technology services focused on data automation and advisory solutions for finance and accounting functions.
- Finance as a Service Outsourced finance and accounting services for high-growth and early-stage companies, providing operational accounting and strategic finance leadership.
Quantifiable outcome
- Successfully supported multiple IPOs with complex technical accounting issues
- +2 more outcomes
Companies that use WilliamsMarston
Customer profileNamed customers5 records
Segments3 records
Ideal customer profiles4 records
WilliamsMarston technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
WilliamsMarston partnerships and signals
Strategic signalPartnerships
Five partnerships are on record, tiered core and major.
- Chord AdvisorscoreAcquired in September 2021, Chord Advisors was a national provider of specialized accounting services specializing in capital markets. The acquisition added over 30 professionals and approximately 500 clients, expanding WilliamsMarston's presence in Dallas, Southern California, and Silicon Valley markets.
- Bay Valuation AdvisorscoreAcquired in January 2022, Bay Valuation Advisors was a leading valuation advisory firm with offices in California, Massachusetts, New Jersey, and Colorado. The acquisition expanded WilliamsMarston's service offerings and strengthened its presence in key geographic markets within the valuation and financial advisory sectors.
- ParadigmmajorAcquired as part of WilliamsMarston's expansion strategy. Paradigm Advisory, co-founded by Travis Hannon who now serves as Partner and South Region Accounting Advisory Leader at WilliamsMarston, added private equity advisory capabilities.
- Oracle CapitalcoreAcquired in July 2022, Oracle Capital was a boutique valuation advisory firm nationally recognized for complex valuation services to publicly-traded and privately-held companies. Rob Maxfield, Oracle Capital's President and Managing Partner, joined as Partner and West Region Valuation Leader.
- AIT ConsultingcoreAcquired in 2025, AIT Consulting was a OneStream implementation specialist. The acquisition brought Ryan Diehl and Ben Novak as Partners and OneStream Practice Leaders, expanding WilliamsMarston's technology advisory capabilities.
Scale indicators5 records
Recent moves7 records
Expansion highlights6 records
WilliamsMarston competitors and assessment
Company assessmentDirect peers
- CrossCountry Consulting: CrossCountry Consulting is a national accounting and finance advisory firm founded by former Big Four professionals, offering technical accounting, transaction advisory, and risk consulting to PE-backed and growth-stage clients. It is the closest direct competitor to WilliamsMarston in the mid-market accounting advisory boutique space.
- Alvarez & Marsal: Alvarez & Marsal is a global professional services firm with a strong transaction advisory and restructuring practice serving PE-backed and corporate clients. Several WilliamsMarston partners (including OneStream leaders) previously worked at A&M, making it a direct competitor for FDD and due diligence talent and mandates.
- FTI Consulting: FTI Consulting is a publicly traded advisory firm providing corporate finance, forensic accounting, and transaction advisory services to companies, law firms, and PE sponsors. Co-founder Landen Williams previously served as a Managing Director at FTI, and FTI competes head-to-head with WilliamsMarston on technical accounting, valuation, and disputes work.
- Riveron: Riveron is a national advisory firm providing transaction advisory, restructuring, and accounting advisory services primarily to PE-backed and middle-market companies. It is a similarly positioned boutique competitor serving the same PE sponsor and pre-IPO client segments as WilliamsMarston.
- Accordion Partners: Accordion is a private equity-focused financial consulting firm providing CFO advisory, transaction support, and accounting services to PE-backed companies. It directly competes with WilliamsMarston in serving the CFO offices of PE portfolio companies.
- Ankura Consulting: Ankura is a global advisory firm with strong practices in transaction advisory, forensic accounting, and valuation services. It serves many of the same corporate, legal, and PE clients as WilliamsMarston and competes on technical accounting, expert witness, and disputes work.
Broad incumbents
- BDO USA: BDO USA is a top-tier mid-market accounting and advisory firm offering audit, tax, transaction advisory, and consulting services across the U.S. Multiple WilliamsMarston partners previously served at BDO (e.g., Audit Partner at BDO USA, Partner and Southeast TAS/FDD Leader at BDO LLP), and BDO competes for similar PE-backed and middle-market clients.
- RSM US: RSM US is a leading middle-market accounting and advisory firm offering tax, consulting, and transaction advisory services to PE-backed, public, and growth companies. WilliamsMarston partners have previously led international tax and partnership tax practices at RSM, making it a comparable mid-market incumbent.
- Grant Thornton: Grant Thornton is a top-tier mid-market accounting firm offering audit, tax, transaction advisory, and consulting services to public and PE-backed middle-market companies. CFO David Stevenson previously worked at Grant Thornton, and Grant Thornton competes with WilliamsMarston for similar clients and technical accounting mandates.
- Deloitte (FAAS / Transaction Advisory): Deloitte's Financial Accounting Advisory Services (FAAS) and Transaction Advisory practices compete directly with WilliamsMarston's core accounting advisory and valuation services, with many of WilliamsMarston's senior partners being former Deloitte partners (e.g., National Valuation Leader, Specialty Tax Leader, Accounting Advisory partners). Deloitte represents the scaled incumbent benchmark for the boutique's positioning.
Market position
Strengths1 record
Weaknesses1 record
Competitive moat4 records
Key risks6 records
Key highlights7 records
Customer concentration
WilliamsMarston social profiles
Digital presenceWilliamsMarston financial estimates
Financial estimateRevenue estimate
Valuation estimate
WilliamsMarston leadership team
Management profileNumber of profiles
Profiles18 records
WilliamsMarston subsidiaries and ownership
Company hierarchySubsidiaries5 records
WilliamsMarston funding detail
Funding detailFunding overview
Funding rounds1 record
Investors1 record
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
WilliamsMarston M&A and investment
M&A and investmentM&A6 records
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about WilliamsMarston
What does WilliamsMarston do?
WilliamsMarston is a national advisory firm providing professional services across five core lines: accounting advisory (M&A, IPO readiness, technical accounting, FP&A, forensic accounting), tax (income tax accounting, consulting, compliance), technology advisory (OneStream implementation, data automation), transaction advisory (financial and tax due diligence), and valuation (purchase price allocation, impairments, 409A, fairness opinions, litigation support). The firm serves pre-IPO, public, and private equity-backed companies with senior-level, partner-led engagement.
Is WilliamsMarston a public or private company?
WilliamsMarston is a private company. It is classified as private equity controlled and is currently operating.
When was WilliamsMarston founded?
WilliamsMarston was founded in 2014. It employs 251 to 500 people.
Where is WilliamsMarston based?
WilliamsMarston is headquartered in Boston, United States, in the North America region.
How does WilliamsMarston make money?
Five revenue lines are on record. Accounting Advisory Services are the primary driver. The others are tax Advisory Services, transaction Advisory Services, valuation Services and technology Advisory Services.
Who are WilliamsMarston's main competitors?
Direct peers on record are CrossCountry Consulting, Alvarez & Marsal, FTI Consulting, Riveron, Accordion Partners and Ankura Consulting. Broad incumbents are BDO USA, RSM US, Grant Thornton and Deloitte (FAAS / Transaction Advisory).
Does WilliamsMarston have an API?
No public API is recorded for WilliamsMarston.
What industry is WilliamsMarston in?
WilliamsMarston's product category is Accounting Advisory Services. Its primary akta.pro industry code is BPAHABAF, Financial Reporting & Technical Accounting Advisory (GAAP/IFRS), with a secondary code of BPAHAOAG, Corporate Development & Strategic Partnerships Advisory (JVs, Alliances, Carve-outs). Its NAICS code is 541219 and its SIC code is 8741.