John C. Ertman


  • JD, Harvard Law School, 1991
  • AB, magna cum laude, Harvard College, 1988; Phi Beta Kappa 


  • New York, 1993

Court Admissions

  • U.S. Court of Appeals for the Second Circuit, 2018
  • Honorable Terrence W. Boyle, U.S. District Court for the Eastern District of North Carolina

John C. Ertman


John specializes in complex commercial litigation, with a focus on the investment management industry. He regularly serves as lead litigation counsel on behalf of private equity, mutual fund, and hedge fund clients, including in securities litigation, class actions, government enforcement actions, mortgage trust disputes, large contract disputes, and whistleblower matters.


  • Defense counsel to investment managers PIMCO, BlackRock, and TIAA in third-party contribution actions brought by Wells Fargo in New York federal court.
  • Defense counsel to First Guaranty Mortgage Corporation in indemnification action involving sale of mortgage loans brought by the Rescap Liquidating Trust in Minnesota federal court.
  • Plaintiff’s counsel to PIMCO Income Fund in RMBS trust action in Minnesota federal court against Wells Fargo and OneMain Financial.
  • Plaintiffs’ counsel for Wells Fargo and Deutsche Bank as Trustees of RMBS trusts and for underlying trust investors in the Wells Fargo, NA v. City of Richmond, CA eminent domain litigation against a California city’s plan to seize mortgage loans. 
  • Plaintiff’s counsel for PIMCO Total Return Fund in an action in Connecticut state court against U.S. Bank as Trustee of RMBS trust.
  • Defense counsel to private equity firm portfolio company Savage Sports in a broken deal litigation before the Delaware Supreme Court.
  • Defense counsel to Cohen & Steers closed end funds in shareholder derivative actions in New York state court involving Auction Market Preferred Shares.
  • Defense counsel to a private equity firm in connection with the “pay-to-play” regulatory investigation by the Securities and Exchange Commission and the New York Attorney General’s Office involving the New York Common Retirement Fund.
  • Defense counsel to Allianz closed end funds in Massachusetts state court sued by an insurgent hedge fund investor. 
  • Defense counsel to venture capital firm StarVest in a broken deal litigation in New York and California state courts. 
  • Defense counsel to a private equity fund general partner in an action over $100 million in fund losses in Maryland federal court. 
  • Defense counsel to Allianz/PIMCO mutual fund complex in shareholder class actions involving market timing and revenue sharing in Maryland and Connecticut federal courts. 
  • Defense counsel to a private equity firm and its public portfolio company in shareholder class actions in Delaware Chancery Court in connection with a “going private” transaction.
  • Defense counsel to a private equity firm in federal court in New York in litigation arising from an $800 million acquisition of private equity interests. 


  • Cited as lead counsel for investment advisers in “Advisers Rip Wells Fargo’s Bid to Turn Tables in MBS Suit,” Law360 (October 17, 2017)
  • Co-author, “Big-Dollar Mortgage Cases on Appeal:  Decisions Expected,” New York Law Journal (October 27, 2014)
  • Quoted, “PIMCO, BlackRock Act to Drop Mortgage Fight,” Ignites (May 20, 2014)
  • “Taking Stock of Three Waves of Mutual Fund Shareholder Litigation,” The Investment Lawyer (October 2008)
  • JD, Harvard Law School, 1991
  • AB, magna cum laude, Harvard College, 1988; Phi Beta Kappa 
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