Ristau & Co., Inc. CPA's Joins Forces with Grimbleby Coleman CPAs

July 27, 2021

Grimbleby Coleman CPAs, Inc. is pleased to announce our merger with local accounting firm, Ristau & Co., Inc. CPA's! This merger strengthens Grimbleby Coleman CPA's position as a reputable firm specializing in multiple key industries across the Central Valley. The combined firm will retain the Grimbleby Coleman CPAs name.

“We are looking forward to joining the Grimbleby Coleman CPAs team; expanding resources and services, while maintaining current high-quality standards for our clients,” said Ryan Root, Partner of Ristau & Co., Inc. Judie Brimmer, Keith Cherry, and Ryan Root will join the Principal team at Grimbleby Coleman.

Both firms have experienced tremendous growth, serving local businesses that have boomed throughout the Central Valley in the past decade. Ristau & Co’s three partners and several team members have built a firm with a solid reputation for providing excellent accounting and tax services. As such, they are well-suited to complement Grimbleby Coleman CPA’s long-standing expertise in the Agriculture and Construction industries and fast-growing services in the areas of consulting/advisory services, client accounting, tax, and estates and trusts. Additionally, this partnership will reinforce the ongoing investment in burgeoning communities and regional businesses.

“It’s an exciting time to continue to build with a team of qualified, smart, hard-working individuals whose diverse skill sets and shared values empower us to further support our clients,” mentions Ian Grimbleby, President and CEO of Grimbleby Coleman, CPAs. “This merger also supports our mutual growth goals."

Grimbleby Coleman CPAs is excited to welcome the Ristau & Co., Inc. team on August 2, 2021. We’re looking forward to this successful partnership! Stay tuned for more about our new team members.



200 West Roseburg Avenue
Modesto, CA 95350

(209) 527-4220 (phone)
(209) 527-4247 (fax)



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Our Commitment to Safety and Prevention of COVID-19

Dear friends and clients,

Thank you for putting your trust in us to provide your tax and advisory services. These are rare and unusual circumstances; but be assured, we are committed to providing continued services and support.

To lessen our societal impact, as well as to protect the well-being of you, our clients, and our team, we ask that the majority of our communications be electronic or over the phone.  

We strongly encourage you to use our electronic collaboration tools for securely scanning and sending tax documents and we have the necessary data security in place to ensure security and privacy. For details regarding our electronic collaboration tools, and specific instructions, click here. We are happy to assist in the set-up of any of these applications, if you have not used them in the past; contact our Admin team at the phone number or email below.

GC looks forward to normalizing our processes as soon as safety dictates. Be well and take care of yourselves, your community, and your loved ones. We are here for you professionally and personally, so do not hesitate to reach out.

All the Best,

Ian Grimbleby, President/CEO and Principal
Grimbleby Coleman CPAs
Certified Public Accountants, Inc.
(209) 527-4220