Kathleen M. "Katie" O'Sullivan
Recognized since 2009
Seattle, Washington
Practice Areas
Appellate Practice
Bet-the-Company Litigation
Commercial Litigation
Contact & Links
Location
- 1201 Third Avenue, Suite 4900
Seattle, WA 98101-3099
Education
- Georgetown University, J.D., graduated 1996
- Yale University, BA
Bar Admissions
- Washington, Washington State Bar Association
Affiliations
- American Law Institute - Member
- Federal Bar Association - Member
- Washington State Bar Association - Member
Federal Clerkships
- United States Court of Appeals
- United States District Court
Perkins Coie LLP
Headquarters:
Seattle, Washington
262 The Best Lawyers in America® awards
274 Best Lawyers: Ones to Watch® in America awards
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Named "Lawyer of the Year" by Best Lawyers® for:
- Bet-the-Company Litigation, Seattle (2025)
- Appellate Practice, Seattle (2024)
- Appellate Practice, Seattle (2016)
Recognized in The Best Lawyers in America® 2025 for work in:
- Appellate Practice
- Bet-the-Company Litigation
- Commercial Litigation
Special Focus:
- Appellate
- Civil Litigation
- Class Actions
- Complex Litigation
Awards:
- Co-Recipient of awards for IOLTA Supreme Court litigation (American Bar Association, Washington State Bar Association, King County Bar Association, Perkins Coie)
- Listed in Washington Law & Politics, “Washington's Super Lawyers," 2007 - Present
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