Transaction Advisory
Boston, MA
Located in the heart of Boston’s Seaport District, Withum is one of the nation’s top 25 accounting and advisory firms.
Withum Plus Boston
Our team of experienced professionals offers tailored solutions across a wide range of industries. We’ll help you through every stage, ensure you have a sustainable business plan and can navigate your growth. We help clients take on today’s complex business landscape by leveraging a technology-forward approach…plus a whole suite of advisory solutions that will level up your success. That’s the Power in the Plus!
(617) 227 3333
Boston Service Specializations
Cybersecurity
Forensic and Valuation Services
Outsourced Accounting Systems and Services
Massachusetts State and Local Tax Updates
Do you or your organization operate in multiple states? Do you own property in a variety of states? Massachusetts State and Local Tax (SALT) laws are always changing and understanding the nuances of the states that you own or operate in is challenging. In these Massachusetts resources, you’ll find just a dash of the most up-to-date details on rules and regulations as state and local tax changes happen by state!
Industries We Focus on in Boston
Beyond the Region
- Inside Public Accounting Top 100 Firms – 22nd Largest Nationally
- Accounting Today Top 100 Firms – 22nd Largest Nationally
- Great Place to Work® – Fortune Best Workplaces for Parents and Women
- Vault Top 25 Accounting Firm
Partner In Charge
Leonard M. Smith, CPA, MSALenny is the partner-in-charge of the Withum’s Seaport office in Boston, MA and Woburn office, bringing over 20 years of expertise in public accounting. As the leader of the Life Science Tax Practice, he specializes in corporate and pass-through taxation, guiding clients through complex financial strategies and tax opportunities. His expertise covers R&D tax credits, Qualified Small Business Stock benefits, M&A transactions, Section 382 limitations, transfer pricing, and equity-based compensation. Additionally, Lenny has a deep understanding of business succession planning and tax controversy, ensuring his clients receive forward-thinking solutions and sound guidance.
Boston Leadership
Withum in the News
Withum Announces 2026 Firmwide Leadership Transitions
This next generation of leaders step forward at a pivotal time for the Firm, bringing the technical expertise and strategic perspective needed to navigate continued growth, rapidly advancing technology and an ever-evolving industry landscape. Grounded in the Withum Way mentality, they will shape what’s ahead while preserving the culture that remains central to how the…
Withum Names Eighteen New Partners
Introducing Our 18 New Partners
Withum’s Columbia Office Welcomes Greater Baltimore
Withum team members, clients and community leaders, including representatives from Howard County and the Central Maryland Chamber, came together to mark the official “door opening” on the new location. The ribbon-cutting ceremony highlighted the evening, which featured citations presented by community leaders welcoming Withum to the Columbia region and recognizing its strong ties to the…
Nadia Matthie Appointed as Chair of the AICPA’s Employee Benefit Plans Expert Panel
The AICPA’s Employee Benefit Plans Expert Panel was formed to protect the public interest and agree on key plan issues by leveraging the knowledge of leaders in the employee benefit plan industry. Nadia’s deep expertise makes her a valuable asset to help further the panel’s mission as Chair of the group. Nadia has more than…
Chris Passmore Named Top Leader on Los Angeles Business Journal List for Fourth Consecutive Year
As partner-in-charge of Withum’s Los Angeles office, Chris plays a pivotal role in the Firm’s growth on the West Coast. With nearly 25 years of experience in the profession, he specializes in assurance and business consulting services to emerging and middle-market companies. In addition to serving technology companies and professional services firms, Chris holds an advanced-level certificate in 401(k)…
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