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About me

My legal practice is focused exclusively in litigation, with a primary area of emphasis in corporate ownership disputes and business dissolutions ("business divorce.") My clients are the owners, officers, and/or directors of privately held companies who need creative and aggressive representation for disputes arising out of breach of fiduciary duty, breach of loyalty, minority oppression, conversion, accounting, wage claims, unjust enrichment, and the business "divorce" often attendant thereto.


Practice areas


  1. Litigation: 85%
    15 years
  2. Real Estate: 15%
    15 years


Payment types:

Cash, Check, Credit card

Attorney endorsements

2 total 

Are you an attorney? Endorse this lawyer

  • Brent William Beecher

    If I were going to hire an attorney to represent me personally in litigation, it would be Mario. Mario has an excellent ability to cut through the extraneous issues, get to what is important, and give informed, reasonable advice about the practical implications of getting particular results. I have worked with him and against him, and have found him to be courteous, professional, and effective. I recommend him highly.


    Brent Beecher Insurance Attorney
    Relationship: Fellow lawyer in community

  • Angela M Low

    As a fellow attorney, I frequently call Mario to discuss various legal issues that I come across in my practice. He is very helpful and always has answers to my questions. Mario is hardworking, trustworthy, and is a great advocate for his clients. I would recommend Mario to anyone without hesitation.


    Angela Low Bankruptcy & Debt Attorney
    Relationship: Fellow lawyer in community

Contact info

Lasher Holzapfel Sperry & Ebberson

601 Union St
Suite 2600
Seattle, WA, 98101-4000


We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
Rising StarWashington Law & Politics Magazine2012
Rising StarWashington Law & Politics Magazine2011
Martindale-Hubbell/Fortune Magazine Top Ranked Law FirmMartindale-Hubbell2011
Rising StarWashington Law & Politics Magazine2010
Rising StarWashington Law & Politics Magazine2009
Rising StarWashington Law & Politics Magazine2008
Rising StarWashington Law & Politics Magazine2007
Work experience
TitleCompany nameDuration
PrincipalLasher Holzapfel Sperry & Ebberson, PLLC2008 - Present
AssociateLasher Holzapfel Sperry & Ebberson, PLLC2001 - 2007
Association namePosition nameDuration
Washington State Bar AssociationN/AN/A
King County Bar AssociationN/AN/A
Legal cases
Case nameOutcome
Minority Member Representation (Business Divorce)Settled
Minority Shareholder Representation (Business Divorce)Settled
Company Representation (Business Divorce)Majority owner achieved 100% ownership control in enterprise.
See all legal cases 
School nameMajorDegreeGraduated
Notre Dame Law SchoolN/AJD - Juris Doctor2001
Seattle UniversityN/ABA - Bachelor of Arts1997
Seattle PrepN/AN/A1994
Speaking engagements
Conference nameTitleDate
Continuing Legal EducationAttendee of Seminar - Everything You Don't Know About E-Discovery2014
Continuing Legal EducationAttendee of Seminar - Applying the Rules of Evidence2014
Continuing Legal EducationAttendee of Seminar - E-Discovery; Now What?2011
Continuing Legal EducationAtendee at Seminar - Accounting 101 for Attorneys2011
Continuing Legal EducationAttendee of Seminar - Civil Court Judicial Forum: Advanced Discovery and Trial Practice2011
Continuing Legal EducationAttendee of Seminar - Boundar Issues and Easement Law2011
Continuing Legal EducationAttendee of Seminar - Civil Procedure and Judicial Review Outside of Trial2011
Continuing Legal EducationAttendee of Seminar - Ethics and Social Media2011
Continuing Legal EducationAttendee of Seminar - Advanced Trial Tactics2011