Gross-Wen Technologies

Logo for Jennings Kallen Advisors client Gross-Wen Technologies

Based in Slater, Iowa, GWT is a leading algae based wastewater treatment company.  Its proprietary revolving algal biofilm treatment technology cost effectively and sustainably treats wastewater.

“GWT has worked with Jennings Kallen Advisors over the past 5 years. They have been instrumental in helping our business navigate the complex regulatory environment of the water treatment industry. Their industry expertise and reliability is the reason we will continue to work with Jennings Kallen for years to come.”


– Martin Gross, CEO

Headquartered in
Des Moines, Iowa

8951 Windsor Parkway, Suite 1
Des Moines, Iowa 50131

Reach us by phone at