Rule Garza Howley The Platinum Standard in Antitrust Advice

A Message About Our Law Firm

Rule Garza Howley LLP provides sophisticated antitrust advice and representation, drawing on a proven track record of more than four decades of successful outcomes with the DOJ, FTC, and their foreign counterparts. With more than $1 trillion in collective deal experience, our team has unparalleled insight into current antitrust enforcement priorities and a unique ability to provide commercially savvy antitrust representation for critical M&A, government investigations, and litigation.

In an era of enhanced antitrust enforcement and new theories of liability, we offer a level of know-how not easily rivaled. For years, our lawyers have been entrusted by multinational clients with many of the highest-profile antitrust matters. Our lawyers have led the DOJ’s Antitrust Division as well as the antitrust practices at some of the country’s most elite large law firms. From the boardroom to the government agencies to the courtroom, we provide antitrust counsel that is nimble, responsive, and intensely client focused.

Read our announcement release here.

When Antitrust is the Key Issue Experience successfully handling the most sensitive and highest-profile antitrust matters of the last four decades.
When Agency Expertise Matters Prominent former senior antitrust officials and a deep knowledge of current staff and leadership.
When "New Antitrust" Comes Knocking Intimate involvement in development of current law and policy, and deep knowledge of the strengths and weaknesses of new theories being pursued by the agencies.

Our Team

Staff Attorneys

Khara Connor

Staff Attorney

connor@rulegarza.com

Deborah Long

Staff Attorney

long@rulegarza.com

Terry Morris

Staff Attorney

morris@rulegarza.com

John Sheckler

Staff Attorney

sheckler@rulegarza.com

Erika Spicer

Staff Attorney

spicer@rulegarza.com

Ryan Strom

Staff Attorney

strom@rulegarza.com

Zaneta Walthour

Staff Attorney

walthour@rulegarza.com

Alicia Whisonant

Staff Attorney

whisonant@rulegarza.com

Karen Zachary

Staff Attorney

zachary@rulegarza.com

Support Staff

Diana Aguirre

Billing Coordinator

aguirre@rulegarza.com

Douglas Evans

Paralegal

evans@rulegarza.com

Michael Holden

Administrative Director & Paralegal Manager

holden@rulegarza.com

Marie Levry

Paralegal

levry@rulegarza.com

Lee Ann Swegle

Office Manager

leeann@rulegarza.com

Nicole Vargas Matar

Paralegal

nicole@rulegarza.com

Blog C

Lawdragon 500 Names All Five Rule Garza Howley Partners as Leading Global Antitrust & Competition Lawyers

January 21, 2026, by rulegarza

Rule Garza Howley’s five founding members have each been included in the 2026 edition of “The Lawdragon 500 Leading...

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Client Alert: FTC Announces New Hart-Scott-Rodino and Clayton Act Section 8 Thresholds for 2026

January 15, 2026, by rulegarza

The Federal Trade Commission (the “FTC”) has revised the jurisdictional and filing fee thresholds of the...

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Rule Garza Howley Shortlisted for Benchmark Litigation Award

January 8, 2026, by rulegarza

WASHINGTON, D.C., January 8, 2026 – Rule Garza Howley LLP has been named to the “shortlist” for the award for the...

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Rule Garza Howley Listed as “Highly Recommended” in Global Competition Review’s 2026 Rankings

December 2, 2025, by rulegarza

Rule Garza Howley LLP has been named “Highly Recommended” in Global Competition Review’s 2026 ranking of Washington, DC...

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Lawdragon 500 Names All Five Rule Garza Howley Partners as Leading Dealmakers in America

October 17, 2025, by rulegarza

Rule Garza Howley’s five founding members have each been included on the 2026 Lawdragon 500 Leading Dealmakers in America...

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Dan Howley and Nate Harris Publish Article on How the Trump Administration is Shifting Antitrust Merger Enforcement

October 14, 2025, by rulegarza

WASHINGTON, DC — October 14, 2025 — Rule Garza Howley Managing Partner Dan Howley and Counsel Nate Harris co-authored the...

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Rule Garza Howley LLP

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Washington, DC 20001

202-843-9280
RULE GARZA HOWLEY LLP