Navigating Mergers and Acquisitions with Expertise and Insight

Expert guidance for your company's pivotal moments

Transactions aren’t simply about closing a deal. They’re about opening new horizons of growth for your business. Whether you are considering a major transaction or evaluating future opportunities, every step of the process—from research and planning to negotiations and closing—requires specialized expertise and attention to detail.

Primarily serving closely held and family-owned businesses, we work with our clients during sales, acquisitions, management buyouts, and exit planning to identify the most advantageous options for their transactional needs. Our specific industry experience in manufacturing, distribution and warehousing, technology, and nonprofits enables us to craft a strategic roadmap that ensures your business's continuity and growth.

We don’t just see numbers. We see the hard work, dedication, and dreams behind your business. Connect with us today to learn how we can guide you through transactions with minimized risk and maximized value.

Two Tonneson employees sit and talk at a round, wood table with a large window behind them showing the trees outside.
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We’re here to support you throughout the process with services including:

  • Deal structure
  • Tax structure optimization
  • Pre-transaction services
  • Buy and sell due diligence services
  • Transaction document review
  • Corporate finance
  • Restructurings and joint venture
Let's work together

Talk to an Expert

Richard Mastrocola

CEO
Wakefield, MA

Kathy Rizzo

Shareholder
Wakefield, MA

Joseph Lanzi

Shareholder
Wakefield, MA

Krissy Moriarty

Shareholder
Wakefield, MA

Jamie Tong-Chow

Shareholder
Wakefield, MA

Pleasure to work with

We have been doing business with Tonneson for over seven years.  Their team is easy to work with and very punctual at meeting deadlines. They are very knowledgeable and informative. On my behalf, I work closely with Joe Lanzi, Rick Mastrocola, and Marie Doucette. They are a pleasure to work with. Our Controller interacts with several members of the audit and tax teams and is very pleased with the services they provide.
—Charlie Masiello | Director, Crystal Motor Express

Valuable business partner

We’ve been working with the team at Tonneson + Co for over 35 years. Their work is timely and accurate, and they are a pleasure to work with. Their team stays current on tax and estate laws, always putting client concerns first. Tonneson is a valuable business partner, playing a key role in our success.

—Michael Tamasi | President & CEO, Accurounds

Financial experts

We have been a client of Tonneson since 1988. We are a small family Logistics company that requires specific financial needs. We have always relied on Tonneson to provide the financial expertise necessary to secure the financing for working capital and equipment purchases. We have gone through several audits and because of the detailed auditing process that Tonneson provides, our experience has been painless. They have been responsive to all our requests and needs. Our business continues to grow and knowing we have Tonneson as our financial partner makes the journey a little easier.

—Michael O'Brien | CEO, Eagle Air Freight, Inc.

Sound financial advice

We have been a client of Tonneson for four decades. We have always received sound financial advice and excellent accounting services over the years. We consider Tonneson to be one of our highly trusted partners.

—Steven Tamasi | President, Boston Centerless

Valued and strategic partner

I consider Tonneson a valued and strategic partner of Signet.

—Bradford Caron | President, Signet

Connect with Boston's Trusted Accountants

Whether you’re an individual, a privately-held business, or a non-profit, our team can help you.

Get the conversation started with our experts today.