Stephen Harry Koch, 80, of West Palm Beach, Florida and Highland Park, Illinois. Beloved husband of Barbara, nee Glick; loving father of Stuart (Christine, nee Schaap) Koch, proud grandfather of Della and Mira Koch; cherished son of the late Seymour and Calmina Koch; favorite uncle of Jeff (Michele) Worth, Ron (Pam) Worth, Steven (Gay) Guller, Robert (Kelly) Guller, Nancy (Michael) Hayt, Dan (Eric) Guller, Jan Kantor, Marcie (Michael) Handler, Tom (Brenda) Glick and the late Deborah (Nesanal) Breningstal; caring brother-in-law of Jerry (Eleanor and the late Judy) Glick, Carole (late Lewis) Worth and Lois (late Arthur) Guller; kind great uncle to many and friend to the countless who knew him. Mr. Koch was a charter Member of The Chicago Board Options Exchange. Funeral services will held at 10:00 a.m., Thursday, March 16, 2023 at Am Shalom 840 Vernon Ave, Glencoe, IL 60022. Interment Rosehill Cemetery. Memorial contributions to Multiple Myeloma Research Foundation (www.themmrf.org) or JAFCO (www.jafco.org) appreciated.