Frontier Financial Corp. said that a “putative shareholders’ class action lawsuit” filed against it has been dismissed.

Everett-based Frontier Financial, parent company of Frontier Bank, said that the suit, which was filed Aug. 20 in Snohomish County Superior Court, was dismissed with prejudice on Nov. 24. The suit targeted Frontier Financial, its directors and SP Acquisition Holdings Inc., according to the company. No other details were immediately available.

Frontier Financial, Washington’s largest commercial bank, abruptly called off a merger with a New York-based investment company last month. The troubled bank has been operating under a cease-and-desist order from regulators. It needs to raise millions of dollars of additional capital to buffer against its bad commercial real estate loans.