Coach USA, the parent company of Short Line and other bus operations throughout the country, has been sold to a Los Angeles, Calif.-based private equity firm.

The transaction, which closed last month after winning the U.S. Surface Transportation Board’s approval, is not expected to result in any immediate changes to bus services — or to management, staff and facilities.

“Nothing has changed, except the ownership,’’ said Sean Hughes, a Coach USA spokesman.

In the mid-Hudson, Short Line provides commuter and leisure travel service to New York City and other destinations as well as direct service to such attractions as Woodbury Common Premium Outlets and the Resorts World Catskills casino in Sullivan County.

Its Stewart Airport Express operates in concert with Norwegian Air’s flight schedule to transport passengers to New York City.

Short Line opened a $16 million office and garage complex in Chester five years ago and moved to Orange County from Mahwah, N.J.

Stagecoach, the Scottish transportation company that has owned Coach USA for the past 20 years, announced its intent to sell its North American division to Variant Equity Advisors for $271.4 million in December, pending regulatory approval.

At the time, Stagecoach said revenue from Coach USA was $630 million, with an operating profit of $28.1 million for the fiscal year that ended April 30, 2018.

The division includes 29 carriers in the United States and Canada that collectively employ more than 4,500 people and own more than 2,200 coaches and buses to make it among the largest ground transportation companies in North America. Gross assets are listed at $478.6 million.

Stagecoach put the division up for sale in October, after its mid-year results showed profit margins and sales were falling, a situation the company attributed to the competitive ridership market in the United States and the rise in car use as oil prices declined.

Martin Griffiths, Stagecoach’s chief executive, said in statements that the proceeds from the sale would be used to reduce debt and that the company would focus on growing its already substantial bus and rail operations in the United Kingdom.

For its part, Variant has already promoted Linda Burtwistle to Coach USA’s chief executive from president and chief operating officer.

Farhaad Wadia, Variant’s managing partner, predicted the firm’s technological, operational and financial resources would allow Coach USA to accelerate innovation and growth and build on its reputation for safe, reliable transportation.