Haydon A. Keitner

Haydon Keitner is a partner in Nixon Peabody’s M&A and Corporate Transactions group. He focuses his practice on mergers and acquisitions, private equity transactions and general corporate work. Haydon has played a key role in deal teams representing buyers and sellers in a variety of domestic and international corporate transactions.

What do you focus on?

Mergers & Acquisitions

I advise buyers and sellers in a variety of merger and acquisition transactions, including stock purchases, asset sales, mergers, divestitures and reorganizations. I’ve represented a strategic buyer in multiple acquisitions and have experience in complex M&A structures. A notable recent transaction involved the reorganization of our client, followed by its merger with a second company and simultaneous sale of assets to a third company.

Private Equity

I represent private equity investors in connection with their portfolio company investments and exits. I also advise portfolio companies of private equity clients with respect to their acquisitions, divestitures and corporate governance matters.

Outside General Counsel

On an ongoing basis, I act as outside general counsel to companies by advising on general corporate matters and a wide range of commercial agreements, including services agreements, licensing agreements and domestic and international joint ventures.

What do you see on the horizon?

I’m seeing a growing number of parties to acquisition agreements obtain representation and warranty insurance policies in order to allocate risk to third-party insurers and facilitate closing transactions. We can help our clients take advantage of this approach while navigating pitfalls.

4 key elements supply chain managers should bear in mind when reviewing commercial contracts

Supply Chain Management Review | June 18, 2017

Boston M&A and corporate transactions partner Haydon Keitner authored this column about four things supply chain managers should consider when reviewing commercial contracts.

Law360 names attys who moved up the firm ranks in Q1

Law360 | April 27, 2017

This article mentions recent leadership promotions at the firm including David Brown, Jared Lusk, Jim Vallee, Graham Beck, Kathleen Ceglarski Burns, Emily Crandall Harlan, Daniel Gibbons, Linda Huber, Ilana Kameros, Haydon Keitner, Darren Miller, Neal Pandozzi, Edward Puerta, Stephen Reil, and Elizabeth Young.

What’s up with this M&A materiality scrape?

Bloomberg Law Mergers & Acquisitions Law Report | April 02, 2017

Boston M&A and corporate transactions partner Haydon Keitner authored this column about materiality scrapes in M&A agreements.


Haydon A. Keitner



Phone: 617-345-1175

Fax: 855-881-4402

Boston University School of Law, J.D.

Yale School of Management, M.B.A.

McGill University, B.A.


New York


Haydon has been recommended in The Legal 500 United States 2019 editorial for M&A/Corporate and commercial—M&A: Middle-market (sub-$500m).

Back to top