Plante Moran Celebrates 100th Anniversary

Southfield, Mich.-based IPA 100 firm Plante Moran (FY23 net revenue of $1.01 billion) is celebrating 100 years in business.

Since its founding in 1924, the firm has grown from a sole accounting practitioner in a Detroit office to a billion-dollar audit, tax, consulting and wealth management firm with more than 3,800 professionals serving clients around the globe.

When asked the secret to the firm’s success, MP Jim Proppe can answer the question with one word: culture.

“Plante Moran’s unique culture is rooted in what Elorion Plante and Frank Moran called their ‘grand experiment,’ ” Proppe explained. “They envisioned an accounting firm where the best practitioners couldn’t wait to get in the door and clients were lining up to receive unsurpassed service. To achieve this, they built our firm on a solid foundation of principles and values like following the Golden Rule, doing the right thing for the right reasons, and putting people and a long-term view before profits. A century later, our firm still operates under these same philosophies. It’s been the key to our success for 100 years, and I have no doubt it’s what will help us succeed for 100-plus more.”

To kick off its centennial celebration, Plante Moran has launched a campaign titled “Count on Us,” a nod to the clients and staff who have counted on the firm since its inception. Over the next year, the firm will tell stories of how it has served clients and how the team supports one another on its website, social media pages, advertisements and more.

“We’re a people firm,” said Proppe. “And throughout this next year, we’re going to be intentional about celebrating the clients and staff who have made our success possible. From businesses we had the opportunity to help build to clients we were able to support through challenging times, there’s a lot to be proud of and even more to be thankful for.”


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