Jay A. Erens

Ian H. Fisher represents commercial clients ranging from small entrepreneurs to Fortune 100 companies. Ian has successfully litigated cases involving real estate, antitrust, trade secret misappropriation, restrictive covenant, consumer, contract, and business tort disputes. Ian has substantial experience defending against class action and navigating multidistrict litigation proceedings. He has successfully defended on appeal many of his trial court victories. He is skilled at identifying stra...

Peter M. Siavelis is a top attorney recognized by Best Lawyers in the practice area(s) of Patent Law. Peter M., who practices law in Chicago, Illinois, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Peter M. is held by other top lawyers in the same geographic and legal practice area.

Michael J. Summerhill is a partner in the firm’s Litigation practice group. He is a seasoned litigator with extensive appellate and trial court level experience. He represents clients ranging from Fortune 500 companies to startups in a variety of industries, including health care, software, health information technology, financial services and FinTech, medical device, consumer products, and venture capital. Mike also arbitrates commercial disputes before the American Arbitration Associa...

Nick is of counsel in the firm’s Securities Litigation & Regulatory practice group. A trial lawyer with 40 years of experience, he defends financial services firms and their employees in securities matters all over the country. Nick’s practice encompasses the full range of investor-based disputes and regulatory enforcement proceedings, as well as disputes arising out of employment practices in the financial services industry. He also handles internal investigations and investi...

Michael Falk is a partner in the Chicago office of Kirkland & Ellis LLP. Michael advises clients in connection with qualified and non-qualified retirement plans, executive and equity compensation, Code Section 409A, Code Section 280G, and the compensation aspects of mergers and acquisitions. His experience includes assisting clients with the design and implementation of defined benefit and defined contribution retirement plans, nonqualified deferred compensation plans, and equity/incentiv...

As a commercial litigator and counselor with more than 20 years of experience, Matt brings a creative, pragmatic, and efficient approach to helping clients resolve complex legal and business problems. Matt is co-chair of the firm’s Litigation Group. He has significant, first-chair trial experience in a wide variety of business disputes. He regularly represents clients in matters involving breach of contract, fraud, breach of fiduciary duty, non-competes, and post-closing disputes. Matt ...

Peter J. McAndrews is a Shareholder at McAndrews and practices in all areas of intellectual property and complex technology law. He has been involved in all aspects of patent litigation, acquisition and counseling, involving a broad spectrum of electrical, biomedical and mechanical technologies. Peter is a US Patent and Trademark Office-to-Appeals Court patent attorney and litigator who helps his clients secure intellectual property rights, make smart decisions with those rights and litigate,...

Attorney, Financial Specialist for Collaborative Divorce, and Mediator From a very young age I always played the role of mediator in my family and with my friends. That is because I have always been able to understand the experiences of both sides and I have always been able to determine what is important to people in order to resolve issues peacefully. Today I use those skills as a financial specialist for collaborative divorce, as a mediator, and as an attorney. With my financial background...

Gil Soffer, managing partner of Katten's Chicago office, has made his mark on both sides of white-collar actions. As a former federal prosecutor and senior Department of Justice (DOJ) official, he thoroughly understands the government's enforcement strategies and tactics. As an experienced white-collar defense lawyer and national co-chair of the firm's litigation practice, he devotes his practice to keeping clients out of trouble and navigating them safely through government investigations an...

Mr. del Hierro is a partner in the Corporate Practice Group of Kirkland & Ellis and heads our bank regulatory practice. He has more than 30 years of experience in representing banks and bank holding companies, thrifts and thrift holding companies, payments and fintech companies, investment banks and institutional lenders in connection with regulatory issues relating to capital formation transactions, mergers and acquisitions and complex financings. He has significant experience representi...