MainStreet Investment Group L.L.C. Wealth Management - Home

"We are told to let our light shine, and if it does, we don't need to tell anybody it does.  Lighthouses don't fire cannons to call attention to their shining - they just shine."  Dwight  L. Moody


In observance of Good Friday, our offices will be closed on Friday, April 19, 2019.  We will reopen on Monday morning, April 22 at our normal time.

Tomahawk office hours: 8am - 4pm

Thiensville office hours: 8:30 am - 4pm




MainStreet Investment Group LLC was founded on the principles of integrity, superior client service, and a commitment to accountability. Our mission is to create a level of service that exceeds our clients' expectations.

If you are retired or close to retirement, it may be beneficial to work with an advisor who has a definable risk management plan, an investment management process, and a level of service that exceeds client expectations. It may be time to look at your portfolio and examine your investment objectives and transition from wealth accumulation to preservation and income.

We are pleased that you have visited us on the web; please bookmark our website for timely market resources. We encourage you to call either of our offices, Tomahawk, WI or Thiensville (Mequon), WI.

You can reach Randy Plantenberg in our Tomahawk, WI office at (715) 453-0722 to schedule a complimentary consultation to see what makes MainStreet Investment Group unique and to discover new possibilities for your portfolio. Randy is located at 1411 N. 4th Street, Suite 103, in the Stonewood Center in beautiful Tomahawk, Wisconsin. This office is open Monday through Friday from 8:00 am to 4:00 pm.

You can reach Rich Nagel in our Thiensville (Mequon), WI office at (262) 478-3000 to schedule a complimentary consultation to see what makes MainStreet Investment Group unique and to discover new possibilities for your portfolio.  Rich is located at 136 Green Bay Road in charming Thiensville, Wisconsin.  This office is open Monday through Friday 8:30 am to 4:00 pm.


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