150 E 4th St #4
Cincinnati, OH 45202-4018

P 513.629.9412
F 513.629.9426

Bar Admissions

  • Ohio
  • Kentucky
  • U.S. Sixth Circuit Court of Appeals
  • U.S. Western District of Kentucky
  • U.S. Northern District of Ohio
  • U.S. Southern District of Ohio

William K. Flynn


Bill Flynn’s career as litigation and trial counsel covers a wide cross-section of state and federal business, investment fraud, and other commercial related disputes. This work includes class-actions, multi-party and other complex litigation involving federal and state securities laws, shareholder derivative actions involving officer and director fiduciary duties and related corporate governance issues.  He is well-known for his experience in the financial services sector as a strong advocate for investors and has recovered millions of dollars lost to fraudulent or unsuitable sales practices, professional negligence and regulatory violations.

He also represents broker-dealers and registered representatives, financial advisors and other fiduciaries in the defense of customer claims and broker employment related claims, as well as other employers and executives in the prosecution and defense of claims involving competitive restrictions, as well as defending against state and federal enforcement actions.

Bill’s general business counsel experience includes long-time general counsel of a multi-state specialty retailer and one of the region’s largest real estate brokerages, as well as marketing, manufacturing, supply, distribution and sales businesses, waste collection and management, financial, insurance agency, mechanical, construction, architectural software sales and marketing, alarm service, editorial and publishing service providers, and franchised and independent automobile dealers.


  • University of Cincinnati College of Law (J.D.)
  • Miami University (B.A.)

Significant Representations

  • Recovered more than $10 million in arbitrated or litigated financial service related disputes for retail and institutional customers.
  • Plaintiffs’ class counsel in more than 20 federal and state class and derivative actions, including lead trial counsel in damage and injunctive actions, as well as co-counsel participation in dozens of other shareholder actions across the country resulting in recoveries of hundred of millions in shareholder damages.
  • Lead trial counsel for Chapter 7 trustee in damages action against former public company officers and directors.
  • Representation of a liquidating banking regulator in litigated bank officer and director claims.
  • Representation of a regulated multi-state health insurance carrier in the insolvency of a contracted managed care organization and subsequent wind-down of state operations.
  • Defense of purchase contract, and other claims, on behalf of one of the region’s largest residential real estate brokerage firms and defense of product, personal injury, and property damage claims on behalf of a large multi-state alarm services provider.

Articles, Publications & Lectures

Community Involvement

  • Ohio Bar Association
  • Kentucky Bar Association
  • Cincinnati Bar Association
  • Public Investor Arbitration Bar Association
  • Strauss & Troy, director and litigation co-chair
  • The Potter Stewart Inn of Court
  • President, Mariemont City Schools Board of Education
  • Chair, Mariemont City Schools Levy Campaign, 2007
  • Chair, Mariemont City Schools District Advisory Council, 2006
  • Williams’ Meadow Homeowners’ Association, president/treasurer, previous
  • Episcopal Church of the Redeemer Vestry, previous
  • Children’s Hospital Business Committee, previous

Honors & Recognition

William K Flynn is rated by Super Lawyers.

  • Martindale-Hubbell AV® Preeminent™ Attorney
  • United States District Court Southern District of Ohio Outstanding Service Award
  • Mariemont City Schools Distinguished Service Award

Practice Areas

  • State and federal court and complex litigation
  • Securities and investment fraud
  • Shareholder derivative and class actions
  • Officer and director fiduciary duties and shareholder rights
  • Broker-dealer, advisor, fiduciary and other investment practices
  • Professional services employment disputes
  • Real estate brokerage and agency claims
  • Business torts, operations, acquisitions and sales, and commercial dispute resolution