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Moss Adams to Acquire Hein

Moss Adams LLP, the seventh-largest accounting firm in Orange County, said it will acquire Hein & Associates LLP to create a firm with $600 million in annual revenue.

Moss Adams, based in Seattle, said it will expand to Denver and Houston while “deepening resources” in Dallas and Orange County.

“Hein fits with what we do, the middle market,” said Roger Weninger, Moss Adams’ regional managing partner, which includes overseeing Orange County. “It gives us a much bigger footprint in the western United States.”

Founded in 1977, Denver-based Hein has an oil and gas practice that will round out the existing industry portfolio at Moss Adams.

The combination will add roughly 300 new staffers to Moss Adams, including 35 partners, bringing the total headcount to nearly 2,900 at 26 locations.

Moss Adams has 159 employees based in Orange County. Hein, the 32nd largest accounting firm operating in Orange County, has 30 of its 300 employees based here.

There will be no layoffs in Orange County because “we need all the good people we can get,” Weninger said. Hein’s Irvine office may consolidate into Moss Adam’s office, which is also in Irvine, he said.

The deal is expected to close on Nov. 1.

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Peter J. Brennan
Peter J. Brennan
With four decades of experience in journalism, Peter J. Brennan has built a career that spans diverse news topics and global coverage. From reporting on wars, narcotics trafficking, and natural disasters to analyzing business and financial markets, Peter’s work reflects a commitment to impactful storytelling. Peter’s association with the Orange County Business Journal began in 1997, where he worked until 2000 before moving to Bloomberg News. During his 15 years at Bloomberg, his reporting often influenced financial markets, with headlines and articles moving the market caps of major companies by hundreds of millions of dollars. In 2017, Peter returned to the Orange County Business Journal as Financial Editor, bringing his heavy business industry expertise. Over the years, he advanced to Executive Editor and, in 2024, was named Editor-in-Chief. Peter’s work has been featured in prestigious publications such as The New York Times and The Washington Post, and he has appeared on CNN, CBC, BBC, and Bloomberg TV. A Kiplinger Fellowship recipient at The Ohio State University, he leads the Business Journal with a dedication to uncovering stories that matter and shaping the local business community and beyond.
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