W. B. Martin Gross

Elkay Manufacturing Co. engages in the manufacture of faucets, water coolers and fountains, smartwell water delivery systems, and quartz sinks. It offers stainless steel sinks, commercial kitchens, plumbing products, cabinetry, home decorations, design, drinking solutions, interior design, and kitchen remodeling. The company was founded by Leopold Katz and Louis Katz on January 26, 1920 and is headquartered in Oak Brook, IL.

The Chicago History Museum is a destination for learning and connecting people to the history of Chicago. The museum is located in Chicago, IL. The museum offers dynamic exhibitions, tours, programs, digital resources, and special events that explore the city's history and connect people to each other. The museum's featured exhibitions include "Back Home: Polish City on Fire: 1871" and "Millions of Moments Facing Freedom." The museum also offers guided tours of the city's neighborhoods, including the South Side, Paseo Boricua and Park, Historic Old Town, and Pilsen Murals.

Part of Oil-Dri Corp. of America, Amlan International is the animal health business of the parent company. The company is based in Chicago, IL and sells feed additives across the world. Amlan International leverages over 80 years of expertise in mineral science to selectively mine and process its unique mineral for consumer and business-to-business markets. Daniel S. Jaffee has been the CEO of the company since 2020.