Tremont Group Holdings Inc., a hedge- fund firm owned by Massachusetts Mutual Life Insurance Co., was sued again for investing with financier Bernard

Tremont Group Holdings Inc., a hedge- fund firm owned by Massachusetts Mutual Life Insurance Co., was sued again for investing with financier Bernard Madoff, who allegedly confessed to a $50 billion Ponzi scheme. Group Defined Pension Plan & Trust, a Jersey City, New Jersey-based investor, sued Tremont and its auditor, Ernst & Young LLP, over claims they missed warnings about the alleged scheme. The complaint, filed today in Manhattan federal court, seeks class-action, or group, status.

Tremont already faces a lawsuit filed Dec. 22 on behalf of investors who may have lost $3.1 billion, according to the complaint. Funds including Walter Noel’s Fairfield Greenwich Group, which invested $7.5 billion, and Ezra Merkin’s Gabriel Capital LP and Ascot Partners LP, were also sued for investing in Madoff’s firm following his arrest Dec. 11.

“You are looking at the tip of an iceberg here,” the pension plan’s lawyer, Fred Longer, said today in an interview. “Entities like Tremont really show the kings here have no clothes. They blindly go into these investments and they’re not disclosing the fact that the investments aren’t well investigated.”