Montana’s CPA Firm History

Founded in 1957 in Helena, Montana, AZ has grown to be Montana’s CPA, technology solutions, and business advisory firm with over 200 professional and administrative support personnel in offices throughout the state. For our entire history, our firm was based on the principle of building relationships and providing excellent client service. Today, our mission remains the same.

We’ve provided tax, audit, accounting, and advisory services to individuals and organizations in the Northwest for more than half a century. Our attention to your needs will enable you to respond confidently to changing personal circumstances or business environments, as well as the dynamics of a global economy.

1957

George Anderson andCarl ZurMuehlen form the partnership of Anderson ZurMuehlen & Co., Helena, Montana.

1978

Anderson ZurMuehlen & Co., opens office in Butte, Montana.

1983

Anderson ZurMuehlen & Co., opens office in Billings, Montana.

1999

Anderson ZurMuehlen & Co., expands office in Billings, Montana.

2001

Anderson ZurMuehlen & Co., opens office in Bozeman, Montana.

2005

Anderson ZurMuehlen & Co., opens office in Missoula, Montana.

2011

Anderson ZurMuehlen & Co., opens office in Great Falls, Montana.

2014

Anderson ZurMuehlen & Co., opens office in Havre, Montana.

2015

Anderson ZurMuehlen & Co., establishes AZ Technology Services.

2018

Anderson ZurMuehlen & Co., establishes Wealth Management & Leverage Services.

2019

Anderson ZurMuehlen & Co., acquires Information Technology Core (ITC).

2020

Anderson ZurMuehlen & Co., expands into Salt Lake City and Boise markets.

Our history is reflected in our quality services.