GOP's tax law offers new opportunities
Enactment of the One Big Beautiful Bill Act codifies the tax priorities of the Trump administration and the Republican Party for many years. The OBBBA re-shapes American tax and regulatory policy with a “new certainty” that will underpin growth strategies for American businesses and those investing in the U.S.
Assessing how the new tax landscape will translate into winning approaches for business planning must begin with an understanding of how the bill’s new provisions will best fit your company’s unique challenges. Stay informed as our public policy and Washington National Tax Office professionals continue to provide insights into the implementation of the OBBBA and the profound consequences it will have on the U.S. economy.
How we can help you
The OBBBA will almost certainly alter your business planning and strategy. Our teams are here to help you tackle current and future challenges alongside you, designing fresh solutions with a balance of scale, skill and service you’ll only find here.
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Mark A. Margulies
National Managing Principal, Tax Services,
Grant Thornton Advisors LLC
Mark Margulies is the national managing principal of Tax Services at Grant Thornton and a member of the Executive Committee at Grant Thornton Advisors LLC.
Fort Lauderdale, Florida
Industries
- Construction & Real Estate
- Manufacturing, Transportation & Distribution
- Technology, Media & Telecommunications
- Private Equity
Service Experience
- Strategic federal tax
- Tax Services
- International Tax
- Corporate Tax



David E. Sites
National Managing Principal,
Washington National Tax Office and International Tax Solutions
Grant Thornton Advisors LLC
David leads the firm's International Tax practice, which focuses on global tax planning, cross border merger and acquisition structuring, and working with global organizations in a variety of other international tax areas.
Washington DC, Washington DC
Industries
- Manufacturing, Transportation & Distribution
- Technology, Media & Telecommunications
- Retail & Consumer Brands
Service Experience
- Tax Services
- International Tax



Storme Sixeas
Managing Director, Tax Legislative Affairs Leader
Washington National Tax Office
Grant Thornton Advisors LLC
Storme Sixeas serves as the Tax Legislative Affairs leader for Grant Thornton’s Washington National Tax Office.
Washington DC, Washington DC
Service Experience
- Tax Services



Dana Lance
National Tax Solutions Leader
Grant Thornton Advisors LLC
Dana Lance is the National Tax leader for the Greater Bay Area and the SALT Practice Leader for the West Region. Dana is based in San Jose, California.
San Jose, California
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- Technology, Media & Telecommunications
- Transportation & Distribution
Service Experience
- Tax Services
- State and Local Tax



Christopher Martin
National Tax Leader, Geographies & Growth
Grant Thornton Advisors LLC
Chris Martin is a principal in Grant Thornton’s Tax Reporting and Advisory practice.
Boston, Massachusetts
Industries
- Technology, Media & Telecommunications
- Life Sciences
- Manufacturing, Transportation & Distribution
- Hospitality & Restaurants
- Services
Service Experience
- Tax Services