Insight

Deidre J. Johnson – New England 2021 Lawyer of the Year

Antitrust Law | Boston, Massachusetts

Portrait of Deidre J. Johnson New England Lawyer of the Year
Best Lawyers

Written by Best Lawyers

Published: May 24, 2021

Head of the Ropes & Gray LLP’s Premerger Notification practice, Deidre J. Johnson has more than two decades of legal experience. With her accomplished career working with multi-national corporations, counseling on foreign premerger regimes, and hundreds of Hart-Scott-Rodino (HSR) filings, it is no wonder Johnson has been recognized as New England’s 2021 “Lawyer of the Year” in Antitrust Law.

Johnson has also been recognized for her work in COVID-19 focused litigation. She believes the way she and her team adjusted to the abrupt and significant changes to their work environment and expectations during the COVID-19 pandemic contributed to her receiving this award. In March alone, Deidre’s team prepared nearly eight percent of the total HSR filings in the U.S. When the Federal Trade Commission (FTC) proposed and sought comments on potential changes to the HSR Act, more than 36 clients contacted her during the comment period.

“I conducted a number of webinars and presentations on this topic over the past few months,” Johnson said. “Given the great uncertainty across sectors in 2020, I was happy to guide clients through this as a thought leader of sorts.”

Overcoming complicated challenges with her team is one of the most satisfying parts of Johnson’s career.

“Part of my practice is focused on multi-jurisdictional antitrust matters,” Johnson explains. “Securing antitrust clearance on an international M&A deal is like a puzzle; one that can have varying end results because you have to put the pieces together in a number of jurisdictions by understanding the inner workings of regulators in places where you don't even speak the language.

It is a continual challenge to maintain an institutional knowledge of the premerger rules - and the intricacies of those rules - in the U.S. and abroad. There are almost 140 different premerger regimes that continue to evolve. New rules and thresholds are always being introduced. A deal that would not have raised any antitrust issues just a few years ago may be impacted by recent rule changes. It is imperative to stay current, and my team does a great job of that. Achieving success on these types of matters is particularly rewarding.”

Due to the constant developments and changes in rules in her practice, Johnson and her team provide vital support to their clients working complex deals.

“Helping our clients get premerger antitrust clearance for their deals is almost always memorable; I love seeing clients experience that sigh of relief, as premerger clearance signals that the deal they’ve been working so hard on can actually close,” Johnson said. “We have great clients, and we share in their success when they can move forward on their deals.”

A great example of this is was her team’s work advising Bain Capital on its $18 billion acquisition of Toshiba’s chip business. They successfully gained antitrust clearance for this time-sensitive deal that required numerous filings in the U.S. and abroad.

Above all, what makes Johnson feel most accomplished is cultivating a team of likewise talented attorneys.

“Together, we provide first-class client service,” Johnson said about the Premerger Notification practice she heads. “I’m exceptionally proud of these attorneys and having the opportunity to put this team together and grow it from the ground up is a highlight of my career.”

Lawyers in Columbus, Ohio

Trending Articles

What AI Visibility Means for Lawyers


by Josh Rupall and Bryan Driscoll

AI tools increasingly interpret lawyers public information. Clear, consistent and credible sources help ensure they describe legal expertise accurately.

AI dashboard visualizing a lawyer's online profile, reputation, and practice information across mult

Recognizing Legal Leaders: The 2027 Best Lawyers Awards in Australia, Japan and Singapore


by Jamilla Tabbara

Market drivers, diversity trends and the elite practitioners shaping the legal landscape.

Illustrated maps of Australia, Japan and Singapore displayed with their national flags, representing

Musk v. Altman: The Lawyers Behind the Case


by Jamilla Tabbara

Meet the Trial Lawyers Shaping One of AI's Biggest Legal Disputes.

Portrait photos of Elon Musk and Sam Altman positioned in front of the OpenAI logo.

Can You Go to Jail at an Arraignment?


by Bryan Driscoll

Understanding What Happens at Your First Court Appearance.

A heavy chain lying on the ground in the foreground with a blurred figure standing in the background

Announcing the 2027 Best Lawyers Awards: Austria, Germany and Switzerland


by Jamilla Tabbara

Celebrating the legal professionals throughout Central Europe.

Graphic displaying three-dimensional map cutouts of Austria, Germany and Switzerland.

The Legal Teams Behind the Blake Lively–Justin Baldoni Settlement


by Grace Greer

A closer look at the legal teams and attorneys involved in the Blake Lively–Justin Baldoni litigation and its resolution.

Split-screen image of Blake Lively and Justin Baldoni

The Best Lawyers in France 2027: Peer-Reviewed Excellence


by Jamilla Tabbara

Seventeen editions of peer trust, a growing profession and a dynamic legal market.

3D Map of France with National Flag Graphic

What Disqualifies You From Filing Bankruptcies


by Bryan Driscoll

A guide to navigating eligibility, the means test and the legal hurdles of declaring bankruptcy.

A silhouette of a large hand pushing over a row of falling dominos toward a small figure standing be

Colorado’s 2026 Water Rights Battles


by Bryan Driscoll

A new era of conflict begins.

Colorado Water Rights 2026: A New Era of Conflict headline

What Happens if You Don't File Taxes


by Bryan Driscoll

The penalties are real, but so are your options. Here's what the IRS can do and what you can do about it.

A torn dollar bill revealing a watchful eye, surrounded by flying documents

2027 Best Lawyers Awards: Honoring Excellence in the Legal Profession


by Jamilla Tabbara

Recognizing the outstanding attorneys leading top practice areas nationwide.

United States with American flag representing The Best Lawyers in America 2027 awards

New England's Climate Litigation Surge


by Bryan Driscoll

What law firms need to know

New England's Climate Litigation Surge: What Firms Must Know headline

How to Start a Class Action Lawsuit


by Bryan Driscoll

Understanding the legal requirements, costs and process of filing a class action.

A group of miniature figurines standing united behind a bold "Class Action" placard.

What Is a Quitclaim Deed? Uses, Risks and When to Get Help


by Bryan Driscoll

A quitclaim deed can be one of the fastest ways to transfer property but knowing when it's the right tool and when it isn't, can save you from serious legal and financial headaches down the road.

One hand holding a wooden house model and another holding house keys.

An Employee's Guide to Non-Disclosure Agreements (NDA)


by Bryan Driscoll

Before you sign anything, here's what you need to know about non-disclosure agreements.

Figure stands before an open giant book, holding a large key, facing a keyhole on the inner page.

How to Optimize Your Best Lawyers Profile for AI Search


by Everett Sizemore

Learn how a complete, well-structured Best Lawyers profile can strengthen your visibility and accuracy across AI search platforms.

A laptop screen displaying the Best Lawyers profile dashboard showing customizable sections.