This excerpt taken from the ATVI DEF 14A filed Jul 29, 2005.
Domestic Stock Purchase Plan
Any employee of the Company or any Domestic Subsidiary (who meets the following requirements is eligible to participate in an Offering Period (as defined below) under the Domestic Purchase Plan:
Notwithstanding the above, an employee of the Company or its Domestic Subsidiaries may not be eligible to participate in the Domestic Purchase Plan if:
As of July 1, 2005, approximately 1,430 employees of the Company and its Domestic Subsidiaries would be eligible to participate in the Domestic Purchase Plan.