The supermarket chain had tried to join forces with Kroger, but judges sided with federal and state regulators who charged that the merger would reduce competition.

Albertsons is suing Kroger for breach of contract and accusing it of failing to exercise its “best efforts” to get regulatory approval for the merger.

Grocery chain Albertsons called off its $25 billion merger with Kroger, ending the largest proposed merger in US supermarket history. “We have made the difficult decision to terminate the merger agreement,