In addition, until the January 1923 adoption of the Mississippi River as the dividing line, Iowa was one of the states normally assigned "W" call letters.

[6] Shaw sold the station to the Cowles family, owners of the Des Moines Register, in October 1934.

WMT moved back to Cedar Rapids the next year, occupying the studios of the defunct KWCR radio after KWCR's frequency was taken over by KSO in Des Moines, another Cowles station, although WMT continued to operate a secondary studio in Waterloo until 1947.

On February 27, 1963, WMT-FM (now KKSY-FM) debuted at 96.5 MHz with the same song, "Don't Send Me Posies When It's Shoesies That I Need", that was played on the AM station's inaugural broadcast 41 years earlier.

The company had also planned to purchase WMT-TV, but the television station was sold to Guy Gannett Communications because of ownership restrictions at the time.

An ownership group that included former Iowa governor Robert D. Ray and sportscaster Forrest "Frosty" Mitchell purchased WMT on October 1, 1986.

In 2014, Clear Channel changed its name to iHeartMedia, Inc. WMT has always maintained at full service staff of newscasters, agriculture reporters and sportscasters.