Now, we're getting ready to see more changes in Newark, as one of the most popular candy makers in the country gets ready to uproot its corporate offices from Newark. Get our free mobile appMars Wrigley, Makers Of M&M's, Will Be Moving Its US Headquarters From Newark, NJWrigley Mars, the makers of M&M's, one of the tastiest candies ever, has been a staple in Newark since 1941, but now, that's all changing. You'll Also Like:Mars Wrigley has been headquartered in Newark, NJ, for over 80 years, and has been a steady employer in the area for as long as I can remember. Mars-Wrigley Will Continue To Operate Plants In Hackettstown, NJThe headquarters of Mars Wrigley plans on relocating to Chicago, but it's not all bad news. Mars Wrigley does plan on keeping its facility in Hackettstown, NJ, open and operating while the corporate headquarters gets ready to relocate in the future.