Atty. James Gregory Martignon

Atty. James Gregory Martignon

James Gregory Martignon is a lawyer practicing ethics / professional responsibility, securities / investment fraud, asset management, hedge funds and financial services and 4 other areas of law. James received a degree from Georgetown University in 1991, and has been licensed for 24 years.

Chicago Chicago 24 yrs experience 24 year
Call (872) 270-8380 Book Appointment

Profile Summary

About James Gregory Martignon at a glance

James Gregory Martignon is an Associate based in Chicago, Illinois, practicing at Ulmer & Berne LLP. They have 24+ years of legal experience, licensed to practice since 2002. Their practice focuses on business, securities, and consumer. Admitted to practice in Illinois U.S. District Court, Northern District of Illinois (2002). Educated at Washington University School of Law (J.D., 2002) and Georgetown University (B.S.F.S., 1991). Serands clients in Chicago, IL and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • James Gregory Martignon is a lawyer practicing ethics / professional responsibility, securities / investment fraud, asset management, hedge funds and financial services and 4 other areas of law
  • James received a degree from Georgetown University in 1991, and has been licensed for 24 years
  • James practices at Ulmer & Berne LLP in Chicago, IL

Practice Areas Explained

James Gregory Martignon's Areas of Practice

Each practice area below reflects the types of cases James Gregory Martignon handles, with a brief overview of what that area of law covers.

Business & Corporate Law

Business attorneys advise founders and growing companies on entity formation, contracts, financing, M&A, and dispute resolution.

James Gregory Martignon is one of 501,317 business attorneys indexed nationally. Browse business attorneys in Illinois →

Securities Law

James Gregory Martignon is one of 64,529 securities attorneys indexed nationally. Browse securities attorneys in Illinois →

Consumer Protection

Consumer protection attorneys for fraud, lemon law, debt harassment, and deceptive trade practices.

James Gregory Martignon is one of 50,607 consumer attorneys indexed nationally. Browse consumer attorneys in Illinois →

Jurisdictional Context

Why local counsel matters in Illinois

Practicing law in Illinois. Legal matters in Illinois are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Chicago are typically filed in the local municipal court or the appropriate Illinois state district court, depending on subject matter and amount in controversy. An attorney licensed in Illinois brings working knowledge of local procedural deadlines, judicial practices in this andnue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in Illinois courts without local counsel or pro hac vice admission.

Looking for additional Illinois attorneys? Browse all attorneys in Chicago or all attorneys in Illinois.

Frequently Asked

Common questions about James Gregory Martignon

Where is James Gregory Martignon's law office located?
James Gregory Martignon's law practice is located in Chicago, Illinois. The firm is Ulmer & Berne LLP. You can contact the office directly through this profile page.
What practice areas does James Gregory Martignon handle?
James Gregory Martignon focuses on business, securities, consumer. Each practice area listed reflects experience handling cases of that type in Illinois.
How long has James Gregory Martignon practiced law?
James Gregory Martignon has 24+ years of legal experience and has been licensed since 2002.
Where did James Gregory Martignon go to law school?
James Gregory Martignon earned their education at (J.D., 2002); (B.S.F.S., 1991).
How can I contact James Gregory Martignon for a consultation?
You can contact James Gregory Martignon directly through this profile page. Click "Ask the Attorney" to submit a question, or "Schedule a Consultation" to book a meeting. Most claimed-profile attorneys respond within one business day.

Education

J.D.
Washington University School of Law
- 2002
B.S.F.S.
Georgetown University
- 1991

Bar Admissions

Illinois U.S. District Court, Northern District of Illinois
Admitted: 2002

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