Starting May 15, 2017, the first wave of Toyota employees — mostly in facilities and information systems management — began working in the new 2 million square foot North American headquarters in Plano. By December 11, 2017, about 4,000 Toyota employees will work in the 100-acre development. The company plans to move in employees in waves of about 250, with a peak of about 350 during the summer. Construction is expected to officially end in October and the project is reported to have remained on schedule.