TL Popejoy is Of Counsel to the firm and practices out of our New York office.

Mr. Popejoy has been named a “Rising Star” attorney by Super Lawyers for 2021, 2022, and 2023. Mr. Popejoy joined the firm in 2020. He focuses on antitrust, whistleblower, derivative, and securities litigation involving complex financial products. 

Mr. Popejoy has taken a leading role in In re Credit Default Swaps Auctions Litigation, 21-cv-00606 (D.N.M.), a class action brought by the firm and the Office of the Attorney General for the State of New Mexico alleging antitrust violations and market manipulation in the credit default swaps market. KM and Mr. Popejoy represent the New Mexico State Investment Council and the putative class of nationwide investors in the action.

Prior to joining KM, Mr. Popejoy practiced as an attorney at Quinn Emanuel Urquhart & Sullivan, LLP and a startup litigation boutique, where he worked on high-profile cases involving complex financial products in large antitrust class actions, contract disputes, and numerous FINRA and SEC investigations. Some of Mr. Popejoy’s past case experience includes: In re European Government Bonds Antitrust Litigation; In re Chicago Board Options Exchange Volatility Index Manipulation Antitrust Litigation, a class action concerning settlement of the VIX “fear index;” Iowa Public Employees’ Retirement System v. Bank of America Corporation, a class action concerning collusive behavior in the stock loan industry; In re Interest Rate Swaps Antitrust Litigation; Alaska Electrical Pension Fund v. Bank Of America Corporation, a class action concerning price manipulation of the ISDAfix benchmark; In re Treasury Securities Auction Antitrust Litigation; Scott v. AT&T Inc., involving the sale of customer “geolocation” information; and Williams v. AT&T Mobility LLC, representing a victim of “SIM swapping” in a case involving cryptocurrency.
 
Mr. Popejoy has also represented pro bono low-income tenants in New York City, as well as New York City public school students in suspension hearings.
 
Mr. Popejoy is the author of The Invention of Potential Life: The Police Power over Women in Reproductive Rights Jurisprudence, a law review article published during Mr. Popejoy’s time in law school by the Women’s Rights Law Reporter, a review founded by the late U.S. Supreme Court Justice Ruth Bader Ginsburg. See 37 Women's Rights Law Reporter 83 (Fall 2015).
 
Before law school, Mr. Popejoy was a Director in algorithmic trading at Credit Suisse and RBC Capital Markets. He is co-inventor of a patent with the founders of the IEX stock exchange that protects institutional investors from high frequency trading arbitrage, and he has argued successfully before the U.S. Patent and Trademark Office.
 
Mr. Popejoy is a member of the Aviation Lawyers Association (formerly the International Air & Transportation Safety Bar Association) and is an instrument-rated pilot. His cybersecurity background includes a CISSP certification (Certified Information Systems Security Professional) and computer security architecture.

Mr. Popejoy has also been the recipient of the following awards:
 

• Individual plaque for Outstanding Antitrust Litigation Achievement in Private Law Practice, American Antitrust Institute
• The Legal Aid Society’s Pro Bono Publico award for outstanding service to The Legal Aid Society and its clients