Raymond H. Siderius

Raymond H. SideriusRay Siderius (Of Counsel) is a founding partner of Siderius Lonergan & Martin. His practice areas include real estate, corporations, probate, complex civil litigation and class actions.

He has had extensive class action experience, principally in the area of securities fraud. He has served as lead trial counsel in class actions in the Western and Eastern Districts of Washington. He and Charles R. Lonergan Jr. served as lead counsel in the class action litigation, Hemphill, et al. v. State of Washington, Washington Supreme Court decision filed Feb. 3, 2005, resulting in estate tax refunds exceeding $150 million. He served as lead trial counsel in Purcell v. BankAtlantic Financial Corporation, a case tried in West Palm Beach, Fla., which resulted in a jury verdict of $8 million and a settlement in 1997 at the $8 million figure while the case was on appeal to the 11th Circuit.

Ray’s trial practice has also included successful prosecution of civil antitrust cases in the Eastern and Western Districts of Washington.

Ray was an Assistant City Attorney for the City of Seattle from 1955 to 1959, and since then has been continually engaged in the general practice of law in downtown Seattle, in partnership with Charles R. Lonergan Jr.

Areas of Practice

  • Real estate, probate, complex civil litigation, class actions.

Bar Admissions

  • State of Washington.
  • U.S. District Court, Eastern Districts of Washington.
  • U.S. District Court, Western Districts of Washington.
  • U.S. Court of Appeals, Ninth Circuit.
  • U.S. Tax Court.
  • U.S. Supreme Court.

Notable cases

  • Lead counsel, Hemphill, et al. v. State of Washington (2005).
  • Lead trial counsel, Purcell v. BankAtlantic Financial Corporation, West Palm Beach, Fla. (settled 1997).


  • LL. B., University of Washington School of Law, 1953.
  • Member, Editorial Board, Washington Law Review, 1952-1953.
  • B.S., Seattle University, 1950.

Community Involvement

  • Volunteer legal services, Legal Action Center, which has the mission of reducing homelessness by preventing illegal or unnecessary evictions of low income residents of King County.

Ray’s paralegal: Mary Berghammer.