Kathleen Mahan

Practice Areas

Litigation & Investigations

Intellectual Property Litigation

Artificial Intelligence

Career

Hinckley Allen - Partner (2022 - Present)

Cook, Little, Rosenblatt & Manson - Member (2018 - 2022) - Associate (2009 - 2018)

The Honorable Richard Galway, New Hampshire Supreme Court - Law Clerk (2007 - 2009)

New Hampshire Superior Court - Law Clerk (2005 - 2007)

Professional Memberships

American Bar Association

Daniel Webster Batchelder, American Inns of Court (2010-Present)

New Hampshire Bar Association, President (2024-2025), President-Elect (2023-2024), Vice President (2022-2023), Committee on Cooperation with the Courts (2016-Present), Board of Governors – Governor at Large (2019-2022), Leadership Academy (2015)

New England Bar Association, Board of Directors (2023-Present)

New Hampshire Women’s Bar Association

New Hampshire Young Lawyer Delegate to the American Bar Association, House of Delegates (2016-2018)

Massachusetts Bar Association

United States District Court for the District of New Hampshire, Federal Court Advisory Committee (2019-Present)

Expert in these Jurisdictions

New Hampshire

Massachusetts

United States Court of Appeals for the First Circuit

United States District Court for the District of New Hampshire

United States District Court for the District of Massachusetts

Work Highlights

Vention Medical

GTI Spindle Technology

Short v. LaPlante

Business and Commercial Dispute Docket

Experience

Kathleen Mahan is a Partner at Hinckley Allen and a business litigator known for her success as an advisor and advocate for her clients. She counsels both plaintiffs and defendants, representing them in complex business matters involving organizational restructuring and corporate governance, non-compete conflicts, contracting, trade secret protections, and protracted property disputes. Kate’s knowledge, influence, and powers of persuasion help clients avoid dire circumstances and, in some cases, costly legal ramifications. She is considered a leader in a wide range of intellectual property matters and was a key attorney in one of New Hampshire’s precedent-setting trade secret cases.

Augmenting her extensive business litigation practice, Kate also represents physicians and other licensed professionals in proceedings before administrative agencies and licensing boards, including the New Hampshire Office of Professional Licensure and Certification (OPLC).

Kate regularly handles appeals before the New Hampshire Supreme Court. In addition to her practice in the New Hampshire Business and Commercial Dispute Court, Kate represents clients in all New Hampshire and Massachusetts state courts, as well as in arbitration proceedings. She also represents clients in the United States District Court of New Hampshire, the United States District Court of Massachusetts, and the United States Court of Appeals for the First Circuit.

Kate is the immediate past president of the New Hampshire Bar Association (NHBA) and the first woman in a decade to serve as its president. She sits on the Board of Governors for the NHBA as well as on a number of its statewide committees. Separately, Kate was appointed to the Federal Court Advisory Committee for the District of New Hampshire. Kate also is a trustee of the New Hampshire Supreme Court Society and is a frequent speaker on litigation topics.

Kate is one of the preeminent lawyers in New England with groundbreaking accomplishments that pave the way for women in law. She is ranked as one of Chambers USA America’s Leading Lawyers for the category of Litigation: General Commercial and has been named Best Lawyers in America for Commercial Litigation, Litigation – Intellectual Property, and Trade Secrets Law, as well as Super Lawyers, New Hampshire and Super Lawyers Rising Stars.

Education

Awards