January 1998: Cornerstone Properties purchased 500, 510, 520, and 540 Lake Cook Road for $150 million. The seller was Matas Corporation. Nestled in the northern Chicago suburbs, Corporate 500 offers customers the features and benefits of a downtown property without the hassle of a lengthy commute. Corporate 500 is 1-1/2 miles west of the Edens Expressway (I-94); 1-mile east of Tri-State To llway (I-294); and -mile north of the Edens spur. The property offers numerous indoor and surface parking options.With a 4:1,000 parking ratio, Corporate 500 has a multitude of parking options ranging from underground heated parking garages to nearby surface lots a short walk from the building(s). All parking garages are video-monitored and are accessible with a building-issued parking pass.The buildings' handsome architecture combines the elegance of marble and mahogany finishes with modern metallic accents. The interior floor plan provides a myriad of choices, ranging from flexible open office environments, to condensed individual offices, each with captivating views of the campus-like grounds.Corporate 500 provides 24/7 manned security which includes sophisticated remote camera view