New era for $5B firm OneSeven as original breakaway founder steps up to CEO

New era for $5B firm OneSeven as original breakaway founder steps up to CEO
Firm was founded by Morgan Stanley breakaways, merged with MGO.
FEB 19, 2025

The evolving story of a $5.3 billion AUM firm that was founded nine years ago by a breakaway team from Morgan Stanley is starting its next phase under a new leader.

OneSeven was founded in 2016 by Michael Mawby, Stuart Gertman, Bruce Greenwald, and Todd Resnick, who wanted to help other advisors to launch and grow their own business. The breakaways teamed up with Ron Gross who became CEO and was also president and CEO of MGO Investment Advisors. The two firms merged in 2022 with Gross remaining as CEO of the combined entity.

But now, Gross is stepping down as chief executive to become chairman with one of the original founders, president Todd Resnick, taking the CEO role.  

The change comes as OneSeven celebrates a strong period of growth, expanding its advisor base by 45% and its assets under management by 37% over the past two years and named an InvestmentNews Best In Wealth Fastest Growing in America in 2024.

"Leading this company has been the privilege of a lifetime," said Gross. "Together, we've built something remarkable - an organization driven by ambition and shared purpose. As I move into my new role, I look forward to continuing to serve OneSeven by meeting with our advisors, strengthening partnerships, and leading OSV-OneSeven Venture. The road ahead is full of promise."

Resnick has played a key role in the firm’s growth and is looking forward to leading the next phase in its journey.

"I'm honored and energized to step into the role of CEO," he said. "OneSeven's success is built on a foundation of innovation and collaboration. I am committed to building on that foundation and accelerating our growth while staying true to our core values."

The inception of OneSeven was explained by Resnick in an interview with CanvasRebel.com where he recounted the story of how he happened to sit next to a guy who didn’t know well but was working for his uncle’s RIA. He asked Resnick how things were going at Morgan Stanley.

That conversation led to Rick introducing Resnick to his uncle, Ron Gross.

“I explained my vision to him of the firm I wanted to build. He was quickly excited by my ideas and had a similar desire to build something,” Resnick recalled.

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