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Ryan Z. Cortazar

Ryan Z. Cortazar
312 641 9750
• Main Line
800 678 9529
• Toll Free
Chicago, Illinois

Ryan Z. Cortazar is a lawyer in Korein Tillery’s Chicago office. His practice focuses on antitrust, consumer protection, copyright, and securities and derivatives litigation in federal and state courts. He also works pro bono in the areas of voting rights, habeas corpus, prisoners’ rights, and educational rights. He has briefed and argued matters before the U.S. Court of Appeals for the Seventh Circuit and federal district courts.


Before joining Korein Tillery, Ryan was a Redstone Fellow at the Chicago Lawyers’ Committee for Civil Rights where he worked to pass the Illinois Automatic Voter Registration Act of 2017 and advocated for voting rights and democracy reform, police accountability, fair housing, and fair employment practices. He also worked in the City of Chicago Office of the Inspector General helping the city obtain substantial compliance with decades-old patronage hiring consent decrees.


Ryan served as a law clerk to the Honorable David F. Hamilton of the U.S. Court of Appeals for the Seventh Circuit. He received his J.D. cum laude from Harvard Law School where he was an articles editor of the Harvard Law Review. While in law school, he worked for the Massachusetts Attorney General and the Office of Congressional Ethics in the U.S. House of Representatives. Ryan received his A.B. in History and Literature from Harvard College.​

Areas of Practice
  • Antitrust

  • Consumer Protection

  • Securities and Financial Instruments

  • Constitutional Law

  • Civil Rights

  • Harvard Law School 

    • ​J.D. cum laude

  • Harvard College

    • A.B. cum laude

    • High Honors in History & Literature

Bar Admissions
  • Illinois

  • U.S. Court of Appeals for the 7th Circuit

  • U.S. District Court Northern District of Illinois

  • U.S. District Court Central District of Illinois

  • U.S. District Court Southern District of Illinois

  • Hon. David F. Hamilton, U.S. Court of Appeals 7th Circuit

  • Spanish

Representative Cases
  • AOT Holding AG v Archer Daniels Midland Company, No. 19-cv-2240 (C.D. Ill.) (Commodity Exchange Act claim for manipulation of ethanol futures contracts).

  • Csupo v Alphabet, Inc., No. 19CV352557, (Sup. Ct. Cal.) (action for conversion of cellular data).

  • LJM Partners, Ltd. v. Does, No. 1:19-cv-00368 (N.D. Ill.) (Commodity Exchange Act claim for manipulation of derivatives tied to the volatility index).

  • Schneider v YouTube LLC, No. 3:20-cv-04423-JD (N.D. Cal.) (action for copyright infringement and unauthorized removal of copyright management information).

  • Litovich v. Bank of America Corp., No. 20-cv-3154 (N.D. Ill.) (antitrust claim for group boycott in market for odd lots of corporate bonds).

  • Sky Fed. Credit Union v. Fair Isaac Corp., No. 1:20-cv-02114 (N.D. Ill.) (antitrust claim for monopolization of credit score market).

  • Piper v. Bayer CropScience, LP, No. 3:21-cv-00021-NJR (S.D. Ill.) (antitrust claim for group boycott and price fixing of crop inputs).

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