Millbrook Real Estate Company traces its origins to Quill Corporation, founded in 1956 by Jack Miller. Starting in his father’s chicken store with a single phone, Jack built the business on customer service, integrity, hard work, and strong management. Joined by his brothers Harvey L. and Arnold Miller, Quill grew into a $630 million company.

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These same values form the foundation of Millbrook Real Estate Company and continue to guide its operations today.

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After Quill was sold to Staples in 1997, Jack and Harvey Miller launched Millbrook Real Estate Company by redeveloping the 37-acre Quill headquarters site in Lincolnshire/Buffalo Grove into the Millbrook Business Center. Between 1997 and 2004, they developed six Class A office buildings totaling 660,000 square feet with in-house property management. Growth continued in 2005 with the most recent acquisition in 2016 adding a total of 1.9 million square feet to the portfolio. The company has since expanded into the Philadelphia market with three acquisitions totaling about 700,000 square feet.

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Today, Millbrook remains committed to the same principles established over 70 years ago—integrity, service, disciplined management, and a long-term focus on tenant satisfaction.

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Today, Jack and Harvey Miller remain actively involved in the company's strategic direction while having transitioned day-to-day leadership to the next generation. Management responsibilities are now led by their grandchildren, Justin Lloyd Miller and JT Bernstein, along with Jack's grandson-in-law, Garett Shiner. This leadership transition reflects Millbrook's commitment to preserving the family's values while positioning the company for continued growth and long-term success.