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William A Markham

Antitrust and trade law Attorney at San Diego, CA

5.0   2 reviews
  • State Years
    California - CA 36 years
    Dist. of Columbia - DC 34 years
  • Licensed for 36 years
    State CA
    Acquired 1988
    Active No misconduct found
  • Licensed for 34 years
    State DC
    Acquired 1989
    Inactive No misconduct found

We have not found any instances of professional misconduct for this lawyer.

About William

Learn William’s areas of practice.

Practice areas
  1. Antitrust and trade law
    Litigation of antitrust claims for plaintiffs and defendants under the antitrust laws of the United States and California. Provide antitrust counseling and guidance on antitrust issues.

  2. Business
    Litigation of claims for false advertising, patent misuse, trademark infringement, copyright infringement, RICO violations, securities fraud, common-law fraud, and contract disputes. Provide counseling and guidance on these issues.

  3. Real estate
    Litigation of claims concerning complex foreclosures, commercial tenancies, encumbrances of title, and breaches of contract concerning transfers of interest in real property.

Mr. Markham is a San Diego attorney who obtained his law degree from Harvard Law School in 1987. He is an experienced, successful litigator of complex business and real estate disputes, and he has litigated a wide array of such matters for plaintiffs and defendants in California since 1988. He has won jury verdicts and bench trials, and he has handled major antitrust litigation and complex commercial litigation in closely contested matters (click here for more details). More generally, he has obtained superb results time after time for his clients, who have included major companies, established firms, entrepreneurs, investors, and others.


You can see Mr. Markham's complete professional biography at



Photos and videos

Attorney William Markham, photo taken in San Diego, CA in 2007.


402 West Broadway, Suite 400
San Diego, CA, 92101


5.0 / 5.0
  2 customer reviews
5 Star
4 Star
3 Star
2 Star
1 Star
Posted by Ed | September 8, 2015
This review is from a potential client who consulted with this attorney.
| Consulted Attorney
Antitrust, unfair trade practices and pricing
Bill is an excellent attorney. He has the excellent combination of significant antitrust expertise with a good business sense, gets to the point, communicates in easy to understand terms, is easy to work with and responds quickly 24/7.
Posted by John | February 15, 2010
Best "Lead Attorney" anyone can ask for!!!
For more than 15 years, Wm. A. Markham has been my Lead Attorney and close associate in all my personal and business transactions. He has represented me, and we have worked together in Administrative, Advertising, Antiturst, Business, Civil Rights, Class Action, Contract, Divorce, Foreclosure, Insurance, Landlord/Tenant, LLCs, Prenuptials, Trusts, Wills/Living Wills, and Wrongful Termination LAW cases, just to name a few. He is fair minded, knowledgable, and a tenacious ledigator. He does is own Filings and research so that he can insure that he has a complete understanding of his client, their needs, rights and how it relates to the the law. I do and will continue to value and look to him for his legal advise and representation when needed. I do not have many people I consider to be close personal friends or associate. I feel fortunate to call William Markham to be both one of my closet friends and associates. Thank you, Bill, for being there for my family and myself!! Feel free to use me as a referrence any time.
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  • Hourly Rates $ 565-565 per hour
Payment methods
Cash, Check, Credit Card


AVVO RATING 10.0 (Superb)

Work Experience

  • Attorney
  • Law Offices of William Markham, P.C.
  • 2012 - Present
  • Partner
  • Maldonado & Markham, LLP
  • 2005 - 2012
  • Proprietor
  • Law Offices of William Markham
  • 2000 - 2005
  • Partner
  • Markham, Redenbacher & Brown, LLP
  • 2000 - 2001
  • Proprietor
  • Law Offices of William Markham
  • 1990 - 1999
  • Associate
  • Coudert Brothers
  • 1988 - 1990
View all work experience


  • Harvard University Law School
  • JD - Juris Doctor
  • 1987
  • University of California Santa Barbara
  • BA - Bachelor of Arts
  • 1984

Sample of Legal Cases

  • Orchard Supply Hardware LLC v. Home Depot USA, Inc. (N.D. Cal. 2012)
  • Settled
  • Antitrust Amnesty -- Department of Justice, Antitrust
  • Complete antitrust amnesty for client
  • Antitrust Investigation/Petrochemicals
  • Successful negotiation/dismissal of all charges
View all legal cases


  • French-American Chamber of Commerce (San Diego Chapter)
  • Member
  • 2001 - Present
  • District of Columbia Bar
  • Member
  • 1989 - Present
  • State Bar of California
  • Member
  • 1988 - Present
  • LRIS Committee of San Diego County Bar Association
  • Member
  • 2012 - 2013
View all associations

Languages Spoken

  • French
  • Spanish

Honors and Awards

  • Super Lawyer
  • Super Lawyers
  • 2023
  • Super Lawyer
  • Super Lawyers
  • 2022
  • Super Lawyer
  • Super Lawyers
  • 2021
  • Semi-Finalist, Best Intellectual Property Litigator
  • San Diego Daily Transcript
  • 2015
  • Semi-Finalist, Best Business Litigator
  • San Diego Daily Transcript
  • 2012
  • Best Real Estate Attorney
  • San Diego Metro Magazine
  • 2012
  • Semi-finalist: "Best business litigator in San Diego County"
  • San Diego Daily Transcript
  • 2011
  • Best Real Estate Attorney
  • San Diego Metro Magazine
  • 2011
  • Semi-finalist: "Best real estate litigator in San Diego County"
  • San Diego Daily Transcript
  • 2010
  • Semi-finalist: "Best business litigator in San Diego County"
  • San Diego Daily Transcript
  • 2007
  • Semi-finalist: "Best business litigator in San Diego County"
  • San Diego Daily Transcript.
  • 2006
View all awards

Speaking Engagements

  • Seminar on antitrust law
  • An Overview of Antitrust Law
  • 2009

Attorney endorsements

Received (10)
Given (9)
Endorse William
Unknown Attorney | May 21
Relationship: Fellow lawyer in community
"Top-notch attorney. Highly respected in the legal community."
Real estate Attorney | Apr 17
Relationship: Worked together on matter
"I endorse this lawyer. Bill is passionate, amicable, extraordinarily intelligent, and one of the most devoted attorneys I have had the honor of working with."
Antitrust and trade law Attorney | Feb 19
Relationship: Fellow lawyer in community
"I endorse this lawyer."
Antitrust and trade law Attorney | Dec 24
Relationship: Fellow lawyer in community
"I just read (twice) the answer of Mr. Markham to an antitrust question. It was beyond accurate, analytic and customized to the needs of the Avvo asker. It was one of the ten best answers I have seen on any subject in Avvo over the past two years. He should be on the "short list" for any client needing representation in the areas of his expertise."
Business Attorney | May 17
Relationship: Fellow lawyer in community
"William is an excellent lawyer. He is extremely competent in his specialty and greatly cares for his clients."
Litigation Attorney | Apr 10
Relationship: Worked together on matter
"I have had the great pleasure of working toghether on two litigation matters with William "Bill" Markham. Bill is an exceptional litigator! He is focused, seasoned, and provides the highest level of excellence for his clients. I am glad to have such a high caliber lawyer on my side. Thanks Bill!"
Litigation Attorney | Feb 13
Relationship: Fellow lawyer in community
"I endorse this lawyer's work. He is a superb attorney in all aspects of practice."
Securities and investment fraud Attorney | Feb 12
Relationship: Worked together on matter
"I endorse this lawyer's work. Mr. Markham has a fine legal mind, a commitment to justice and a spirit of tenaciousness that makes him a powerful litigator. I recommend him highly."
Business Attorney | Mar 12
Relationship: Opposing Counsel on matter
"Bill is a fine attorney; a strong advocate for his clients and extremely knowledgeable about business and real estate issues."
Antitrust and trade law Attorney | Jun 08
Relationship: Co-worker
"Bill Markham has an outstanding legal mind. His tenacity and dedication to the client's matters is what sets him apart from the vast majority of lawyers. William has been my partner for seven years and I trust his judgment implicitly. As my partner our law firm, I often confer with him on the matters on which I am working on. I recommend Bill as an attorney and endorse his work as a trial attorney without any reservation at all. He truly is a "superb" attorney as he is recognized by Avvo."
View more endorsements
Real estate
Antitrust and trade law
Real estate
Chapter 11 bankruptcy
White collar crime