Fred Zimmerman would die in office on December 14, 1954 after being reelected. Louis Allis was appointed on December 16th to fill the vacancy for the unexpired term ending January 3, 1955. Glenn M. Wise was appointed for the full term on January 3, 1955.
Source for Popular Vote data: Wisconsin Board of State Canvassers, "Secretary of State," Statement of Board of State Canvassers for State Officers General Election - 1952 (Madison, 1952)