Advertising agencies Wesley Day and Co. and Trilix have combined in an agreement that becomes official today.

Founded in 1949, West Des Moines-based Wesley Day has served Iowa brands such as Shazam Inc. and WHO radio.

Wesley Day’s clients will join the Trilix’s roster, according to a release. Wesley Day’s CEO Dave Sanderson said he started considering a merger after his business partner retired and he had to take on more management responsibilities.

“I want to get back to what I love about the business – creativity and strategy,” he said.