West Corp., which employs more than 1,250 people in the Fox Valley, announced it will be acquired by the New York-based private equity firm Apollo Global Management in a deal estimated at $5.1 billion.

The Omaha, Neb.-based publicly-traded enterprise communications service provider employs more than 1,000 at two downtown Appleton locations and another 250 employees at an office in Ashwaubenon. When announcing the acquisition just prior to the release of its first quarter 2017 earnings announcement on May 10, officials from West did not indicate whether the change of ownership might affect employment levels or services provided by its Fox Valley offices.

The acquisition is expected to close during the second half of fiscal 2017.