Tina Diamantopoulos Named Regional Director of Chicago Office

The Securities and Exchange Commission today announced that Tina Diamantopoulos has been named Director of the Chicago Regional Office, the Commission’s second-largest regional office.

Ms. Diamantopoulos is a 30-year veteran of the SEC and has held leadership roles in both the Division of Enforcement and the Division of Examinations. Since April 2022, she has served as the Associate Director for the regional broker-dealer examination program supervising teams that examine broker-dealers, exchanges, transfer agents, municipal advisors, funding portals and security-based swap dealers.

“I am pleased that Tina will continue her longstanding service at the Commission in her new role as Chicago Regional Director,” said SEC Chair Gary Gensler. “Tina’s wide-ranging experience in the Chicago office will be an asset to the agency’s work. I also would like to thank Kay Pyszka and Vanessa Horton for agreeing in December to serve as Acting Co-Directors of the office.”

As Director of the Chicago Regional Office, Ms. Diamantopoulos will lead a staff of more than 275 attorneys, accountants, investigators, securities compliance examiners, and other personnel involved in the performance of compliance examinations and the investigation and litigation of enforcement actions.

"Tina brings invaluable knowledge and perspective to this position from her deep experience across the SEC,” said Gurbir S. Grewal, Director of the SEC’s Division of Enforcement. “We look forward to working with her to advance the Enforcement program in the Chicago Regional Office and across the Enforcement Division.”

“I am delighted that Chair Gensler named Tina as the Chicago Regional Director. She is a visionary leader whose dedication, expertise, and commitment has strengthened compliance and greatly enhanced protections for investors in the region,” said Richard R. Best, Director of the SEC’s Division of Examinations.

Ms. Diamantopoulos began working in the Enforcement Division in the Chicago office in 1994 and was promoted to Branch Chief in 1999. In 2004, she was selected to serve as a Senior Special Counsel in the Examinations Division, where she was responsible for advising the broker-dealer examination program, representing the Commission in dealings with the securities industry, state and federal officials and the public, and handling enforcement referrals. In 2010, she became the Counsel to the Regional Director, where she provided advice on legal, policy and operational issues,

“I am honored and excited to serve as the Director of the SEC’s Chicago Regional Office. I look forward to leading our incredibly talented team of Enforcement, Examinations, and Operations professionals who are unequivocally committed to protecting investors and ensuring compliance with the federal securities laws,” said Ms. Diamantopoulos. “Together, we will continue the important work of the Commission to increase compliance and protect investors now and into the future."

Ms. Diamantopoulos earned her law degree from Northwestern Pritzker School of Law and her bachelor’s degree from Marquette University.