Credit union Horizon Credit is closing a $4 billion acquisition in the nation’s capital and closing its flagship Seattle office.

The news comes as the company looks to bolster its growth with new business in other markets, as well as its expansion of the Horizon Gold outlet in Seattle.

The company has 1,400 employees and 10 offices in Washington, Oregon, Nevada, California, Arizona, Hawaii and Alaska.

“This will be our largest-ever move to the state of Washington, adding nearly 1,000 employees to our Seattle headquarters,” said Chase W. Miller, Horizon Credit’s CEO.

“The impact of the acquisition is to drive our growth and ensure our future growth in the state.”

Horizon Credit will keep more than 2,000 workers at the flagship Seattle location and 1 to 1,500 people in its Seattle-based expansion.

Miller said Horizon Credit will continue to serve customers across the country.

He said Horizon will continue working with the state’s Department of Finance and the state Department of Health to find additional business opportunities for Horizon Credit employees.

Horizon Credit was founded in 1991 and has more than $1 billion in assets.