David B. Cosgrove

David B. Cosgrove is an attorney at Cosgrove Simpson who represents investors and financial professionals in securities and business law disputes. Cosgrove advises financial advisers and broker-dealers on state, FINRA, and SEC inquiries, investigations, and enforcement actions, while also handling investor fraud litigation and U-5 defamation matters. Beyond the financial industry, his litigation practice includes commercial disputes and business divorce matters that require careful factual development, strategic motion practice, negotiation, and trial preparation.

Cosgrove earned both a J.D. and a B.A. from the University of Notre Dame. His academic background supports a practice involving financial regulation, securities disputes, business litigation, and written advocacy. He has published on investment adviser arbitration clauses, regulatory and product changes affecting annuities, college and university law, and athlete-agent legislation, reflecting sustained engagement with legal issues that intersect with regulated industries, business relationships, and complex litigation.

Cosgrove represents clients in disputes involving financial products, investment relationships, broker-dealer operations, commercial contracts, and regulatory scrutiny. His work includes responding to inquiries and enforcement actions by securities regulators and self-regulatory bodies, as well as litigating business conflicts outside the financial sector. This combination allows him to address matters where a commercial dispute can develop alongside licensing, compliance, reputational, or regulatory concerns that require coordinated legal strategy.

David B. Cosgrove has received recognition for litigation work, including selection to the 2025 Missouri Lawyers Media POWER List for Commercial and Consumer Litigation and a 2026 ICON Honors award. His practice brings together securities litigation, regulatory defense, and broader business disputes. Clients rely on counsel that can evaluate litigation risk, regulatory exposure, and business consequences together, particularly when investigations, contractual conflicts, or financial industry disputes threaten professional or commercial interests.

Law Office Affiliations

• Attorney, Cosgrove Simpson, LLC
• Member, The Missouri Bar
• Member, Massachusetts Bar Association
• Member, United States Supreme Court
• Member, United States District Court, Western District of Missouri
• Member, United States District Court, Eastern District of Missouri
• Member, United States District Court, Central District of Illinois
• Member, United States District Court, District of Massachusetts
• Member, 8th Circuit Court of Appeals

Licensed State

• Missouri
• Massachusetts

Education

• University of Notre Dame
  Juris Doctor (JD)
• University of Notre Dame
  Bachelor of Arts (BA)

Awards & Badges