Gregory B. Koltun is engaged in a complex business litigation practice focused on antitrust litigation and is Managing Partner of the Los Angeles office. He has litigated cases in state and federal courts throughout the country in a variety of industries and fields, and has significant lead trial experience in complex business litigation.

In the antitrust field, Mr. Koltun has been involved in the defense of large-scale actions involving major international corporations, including nationwide consumer class actions alleging antitrust violations. He has also provided ongoing counseling to clients on a wide range of antitrust issues. In the consumer class action area, Mr. Koltun has handled breach of contract, fraud, false advertising, and unfair trade practice cases involving financial institutions, transportation companies, and insurance companies, among other.

Mr. Koltun also regularly handles cases involving financial statement issues, including disputes over complex accounting, auditing, and taxation issues in professional liability cases and in other types of business litigation.

He joined Morrison & Foerster in 1991.