Two members of the U.S. Securities and Exchange Commission blasted the agency’s decision to spare Oppenheimer Holdings Inc. from additional sanctions related to a recent settlement, saying regulators were turning a “blind eye” to the investment bank’s pattern of misconduct.

SEC Commissioners Luis Aguilar and Kara Stein, both Democrats, said they opposed a waiver of a penalty that would have barred Oppenheimer from raising money for private firms and hedge funds after the company admitted last week to improperly selling billions of shares of penny stocks.