WilliamMarston was founded in 2014 in Boston and assists pre-IPO, private equity-backed, and public companies in accounting, tax, valuation advisory, and other services.

WilliamMarston provides accounting services that include accounting advisory, mergers & acquisitions, divestitures, interim management, financial planning & analysis, initial public offerings, De-SPAC mergers, technical accounting, and managed SEC services.

WilliamMarston delivers corporate tax services such as valuation allowance analysis, uncertain tax positions, quarterly tax positions, share-based payments, tax accounting for business combinations, due diligence, and footnote disclosures.

In addition, corporate tax specialists from WilliamMarston will assist in tax compliance, co-sourcing & outsourcing, tax controversy assistance, accounting for income taxes, strategic tax planning, and much more.

As a part of valuation services WilliamMarston assists in share-based payments, derivatives, purchase price allocation, litigation& dispute consulting, goodwill & intangible asset impairments, tax valuation, and S-Corp conversion.

WilliamMarston provides private equity services like technical & purchase accounting, due diligence, interim management, financial reporting, process improvement, audit preparedness, post-merger integration, KPI assessments, and others.

Also, the company provides restructuring services such as debt restructuring, cash flow modeling, liquidity management, plan of reorganization, claims management, bankruptcy reporting, and interim management.



Through our Accounting Advisory Services line, WilliamsMarston provides audit readiness and transaction services to solve complex technical accounting, operational finance and financial reporting demands. Our skilled, credentialed and multidisciplinary teams support mergers, acquisitions, divestitures, IPOs, de-SPAC mergers, technical accounting and new accounting standards adoption. With expertise and a relentless dedication to quality service, we resolve challenges in the office of the CFO before they impact the broader business. Our team features top-rated former public accounting professionals, including many former Big 4 national office and FASB staff members. Our reputation is built on our relentless dedication to quality service and technical excellence. We bring the talent, passion and expertise to the accounting for transactions in organizations across many industries.


WilliamsMarston is the CFO’s most trusted advisor through periods of rapid growth and transformation. As management teams scale their organizations, we advise them on the most complex matters across the financial advisory spectrum. Through our Corporate Tax Services line, our team of tax experts provides strategic insight and foresight for corporate tax matters, compliance, and controversy, keeping clients positioned to manage risk and sustain value. We are technical specialists and experienced advisors who balance the needs of our clients and the broader regulatory context to produce timely advice and solutions for confident business decisions.

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Contact info

405 Lexington Ave 7th Fl, New York, NY 10174, США

Business Hours

Monday 8:00am - 6:00pm
Monday 8:00am - 6:00pm
Monday 8:00am - 6:00pm
Monday 8:00am - 6:00pm
Monday 8:00am - 6:00pm
Local time 15:09pm


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What services does WilliamMarston provide

We provide services in the following areas Accounting, Tax

How can I contact WilliamMarston

You can call us +1 617-982-6699, come to the office 405 Lexington Ave 7th Fl, New York, NY 10174, США NY10174, or via social networks ["Facebook","Twitter","Instagram"]

What are the opening hours of WilliamMarston

We work from 8:00am to 6:00pm, GMT-4

What country is WilliamMarston headquartered in

Our organization is headquartered in United States