Atty. James Patrick Langdon

Atty. James Patrick Langdon

James Patrick Langdon is a lawyer practicing securities & investment fraud, corporate governance and compliance, m&a and private equity and 1 other area of law. James received a B.A. degree from University of Iowa in 2002, and has been licensed for 20 years.

Chicago Chicago 20 Years Experience 20 year
Call (312) 462-0399

Profile Summary

About James Patrick Langdon at a glance

James Patrick Langdon is an Associate based in Chicago, Illinois, practicing at Sidley Austin LLP. They have 20+ years of legal experience, licensed to practice since 2006. Their practice focuses on business, m&a, securities, and consumer. Admitted to practice in Illinois (2006). Educated at University of Chicago Law School (J.D., 2006) and University of Iowa (B.A. University, 2002). Serves clients in Chicago, IL and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • James Patrick Langdon is a lawyer practicing securities & investment fraud, corporate governance and compliance, m&a and private equity and 1 other area of law
  • James received a B.A. degree from University of Iowa in 2002, and has been licensed for 20 years
  • James practices at Sidley Austin LLP in Chicago, IL

Practice Areas Explained

James Patrick Langdon's Areas of Practice

Each practice area below reflects the types of cases James Patrick Langdon 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 Patrick Langdon is one of 452,854 business attorneys indexed nationally. Browse business attorneys in Illinois →

Mergers & Acquisitions

James Patrick Langdon is one of 45,724 m&a attorneys indexed nationally. Browse m&a attorneys in Illinois →

Securities Law

James Patrick Langdon is one of 58,852 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 Patrick Langdon is one of 45,538 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 venue, 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 Patrick Langdon

Where is James Patrick Langdon's law office located?
James Patrick Langdon's law practice is located in Chicago, Illinois. The firm is Sidley Austin LLP. You can contact the office directly through this profile page.
What practice areas does James Patrick Langdon handle?
James Patrick Langdon focuses on business, m&a, securities, consumer. Each practice area listed reflects experience handling cases of that type in Illinois.
How long has James Patrick Langdon practiced law?
James Patrick Langdon has 20+ years of legal experience and has been licensed since 2006.
Where did James Patrick Langdon go to law school?
James Patrick Langdon earned their education at (J.D., 2006); (B.A. University, 2002).
How can I contact James Patrick Langdon for a consultation?
You can contact James Patrick Langdon 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.
University of Chicago Law School
- 2006
B.A. University
University of Iowa
- 2002

Bar Admissions

Illinois
Admitted: 2006

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