Atty. Matthew D. Costigan

Atty. Matthew D. Costigan

Matthew D. Costigan is a lawyer practicing corporate law, mergers, acquisitions and divestitures, securities and 3 other areas of law.

Chicago Chicago 28 Years Experience 28 year
Call (312) 219-2317

Profile Summary

About Matthew D. Costigan at a glance

Matthew D. Costigan is an Associate based in Chicago, Illinois, practicing at Winston & Strawn LLP. They have 28+ years of legal experience, licensed to practice since 1998. Their practice focuses on business, tax, m&a, securities, and creditor rights. Admitted to practice in Illinois (1998). Educated at Northwestern University (J.D., 1998) and Northwestern University (B.A., 1992). Serves clients in Chicago, IL and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Matthew D. Costigan is a lawyer practicing corporate law, mergers, acquisitions and divestitures, securities and 3 other areas of law
  • Matthew received a B.A. degree from Northwestern University in 1992, and has been licensed for 28 years
  • Matthew practices at Winston & Strawn LLP in Chicago, IL

Practice Areas Explained

Matthew D. Costigan's Areas of Practice

Each practice area below reflects the types of cases Matthew D. Costigan 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.

Matthew D. Costigan is one of 452,854 business attorneys indexed nationally. Browse business attorneys in Illinois →

Tax Law

Tax attorneys handle IRS audits, tax debt, international tax, estate planning, and tax court litigation.

Matthew D. Costigan is one of 77,130 tax attorneys indexed nationally. Browse tax attorneys in Illinois →

Mergers & Acquisitions

Matthew D. Costigan is one of 45,724 m&a attorneys indexed nationally. Browse m&a attorneys in Illinois →

Securities Law

Matthew D. Costigan is one of 58,852 securities attorneys indexed nationally. Browse securities attorneys in Illinois →

Creditor Rights & Collections

Matthew D. Costigan is one of 39,028 creditor rights attorneys indexed nationally. Browse creditor rights 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 Matthew D. Costigan

Where is Matthew D. Costigan's law office located?
Matthew D. Costigan's law practice is located in Chicago, Illinois. The firm is Winston & Strawn LLP. You can contact the office directly through this profile page.
What practice areas does Matthew D. Costigan handle?
Matthew D. Costigan focuses on business, tax, m&a, securities, creditor rights. Each practice area listed reflects experience handling cases of that type in Illinois.
How long has Matthew D. Costigan practiced law?
Matthew D. Costigan has 28+ years of legal experience and has been licensed since 1998.
Where did Matthew D. Costigan go to law school?
Matthew D. Costigan earned their education at (J.D., 1998); (B.A., 1992).
How can I contact Matthew D. Costigan for a consultation?
You can contact Matthew D. Costigan 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.
Northwestern University
- 1998
B.A.
Northwestern University
- 1992

Bar Admissions

Illinois
Admitted: 1998

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