The senior promotions and appointments concern its private client and San Francisco operations. Oppenheimer's wealth management segment had $55.2 billion in AuM at the end of 2025.

Oppenheimer & Co has promoted David Fleming to a leadership role in its private client division. He will be based in New York.

Fleming will report to Ed Harrington, executive vice president and head of the private client division, where he will oversee branches in select markets.

Fleming joined Oppenheimer in 2022 and assumed leadership of the firm's San Francisco office. His 30-year career includes advising wealthy individuals and corporate executives at investment firms including Stifel, Barclays, Deutsche Bank, Credit Suisse and Donaldson, Lufkin & Jenrette

In a related move, Ron Guidi will become branch manager in San Francisco, replacing Fleming. He will oversee day-to-day operations and focus on growing Oppenheimer's presence in the Bay Area. 

Guidi brings more than 26 years of experience providing financial and business advice to high net worth clients and senior executives. He’s worked at firms such as Rockefeller Capital Management, Deutsche Bank, and Robertson Stephens.

"Dave has done an outstanding job leading our San Francisco office, and this promotion reflects the confidence we have in his ability to shape the next chapter of growth across the Private Client Division," Harrington said. "He brings credibility with advisors, strong business judgment, and a clear understanding of what it takes to build high-performing branches and advisory teams. At the same time, we are excited to welcome Ron, a seasoned leader with deep roots in the Bay Area, and we believe he will continue the momentum Dave created in that office."

In 2025, Oppenheimer's wealth management segment generated revenue of more than $1 billion, with assets under management reaching $55.2 billion – a record – and assets under administration totaling $143.3 billion as of December 31.