Timothy P. " Tim" Callahan

Kim R. Walberg is a top attorney recognized by Best Lawyers in the practice area(s) of Gaming Law. Kim R., 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 Kim R. is held by other top lawyers in the same geographic and legal practice area.

James F. Herbison is a top attorney recognized by Best Lawyers in the practice area(s) of Antitrust Law and Litigation - Antitrust. James F., who practices law in Chicago, Illinois, has been recognized since 2019. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which James F. is held by other top lawyers in the same geographic and legal practice area.

Peter Sullivan practices in trial and litigation of complex professional liability and commercial litigation cases, including actions against accountants and attorneys, director and officer liability and coverage cases, consumer class action cases and breach of contract cases. Mr. Sullivan also focuses on lender liability suits, real estate litigation, UCC litigation, state and federal securities law claims, RICO claims, business tort litigation and common law fraud actions.

Brian gets things done: a nationally ranked lawyer with engineering and business expertise who’s just as comfortable trying cases in the courtroom as he is creating solutions at the negotiation table. As a trusted advisor and first-chair trial lawyer, Brian has represented clients through every stage of litigation on both sides of the “v” from pre-suit negotiations through trials and verdicts to appeals and judgment enforcement. Earlier in his career, Brian finished graduate...

Representation and counseling of substantial industrial corporations and private investment funds, primarily in connection with public and private business combinations, dispositions and similar transactions, international business transactions, private equity investments, advanced planning for unsolicited acquisition proposals, public and private securities offerings, disclosure issues and other general corporate and securities matters.

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...

Jeffrey B. Kaplan P.C. is a top attorney recognized by Best Lawyers in the practice area(s) of Private Funds / Hedge Funds Law. Jeffrey B., 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 Jeffrey B. is held by other top lawyers in the same geographic and legal practice area.

Shilpi Gupta is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate Law and Mergers and Acquisitions Law. Shilpi, who practices law in Chicago, Illinois, has been recognized since 2016. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Shilpi is held by other top lawyers in the same geographic and legal practice area.

Floyd Mandell is the national co-chair and founder of the firm's Intellectual Property department. He has represented some of the world’s most recognizable companies in intellectual property litigation. Few other lawyers have handled as many high-profile cases over the past 20 years involving copyrights, trademarks, trade secrets, trade dress, false advertising and defamation. He has been lead counsel in more than 40 published decisions, many involving novel or cutting-edge issues. On m...

Conrad C. Nowak joined Corboy & Demetrio in 2023, bringing with him more than 18 years of defense litigation experience in the areas of personal injury, product liability, toxic tort, construction, aviation, trucking and commercial litigation. A former litigation partner at a national law firm, he successfully represented clients at numerous trials, mediations and arbitrations. He has harnessed that experience to better serve people and families who have suffered due to the negligence of ...