With 30 years of experience serving Delaware corporations and families.

GORDON, FOURNARIS & MAMMARELLA, P.A., is a Delaware law firm with an international reach. We combine big law sophistication and skills with the individualized attention and responsiveness that are the hallmarks of a smaller firm, all under one historic roof.

Our lawyers advise individuals, families, businesses, and nonprofits on high value trust and estate planning matters; business formation, operations, and transactions; commercial real estate; and complex commercial, corporate, and fiduciary litigation. We collaborate closely with our clients and their advisors to shape and execute legal strategy efficiently.

At GF&M, we respect our clients, colleagues, competitors, and the law. Through our lawyers’ skills, dedication, and successes, we have grown our boutique law practice from a local law firm into a firm that is recognized across the country and throughout the world. We are proud of our international reputation and even prouder that we continue to be a trusted law firm for the people of Delaware.

Our Areas of Practice

About Gordon, Fournaris & Mammarella, in Michael Gordon's words

By the Numbers

100

years as trusted Delaware counsel

100%

of attorneys have a Masters (LL.M) in Taxation

100

American College of Trust and Estate Counsel Fellows, including the 2025-26 ACTEC President

100%

dedication to clients

Recent News

04.10.26

Bill Kelleher Named American Bar Foundation Fellow

Bill Kelleher, a director at Gordon, Fournaris & Mammarella, P.A., has been elected as a Fellow of the American Bar Foundation (“ABF”). ABF Fellows are a global honorary society of attorneys, judges, law faculty, and legal scholars whose public and private careers have demonstrated READ MORE

04.10.26

Court of Chancery Denies Emergency Petition to Change Code Status

The Delaware Court of Chancery recently denied an emergency petition (the “Petition”) to change the code status of J.L.S., a person with an alleged disability, filed by his court-appointed guardian (the “Guardian”). The Guardian sought to withdraw life-sustaining support based on a major READ MORE

03.11.26

GF&M’s William Kelleher and Christina Smith Pen New Article Examining the Estate Plan Dramatized in the Acclaimed Television Show House of Guinness

Bill Kelleher and Christina Smith wrote the article titled Bloodlines, Beneficiaries, and the Black Stuff: How Sir Benjamin Guinness’s Estate Plan Preserved a Dynasty—and What It Teaches Us About Modern Succession Law, which was published in the March/April 2026 Edition of the ABA Probate & READ MORE

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