The Firm Clients Call When
Winning is Everything™

Photo of Mark Wilson and Michael LeBoff

Almost $300 Million Recovered
Almost $1.5 Billion Saved for Clients

Business Litigation and Attorney Malpractice Trial Lawyers
Orange County And Newport Beach California

Trial Lawyers With Decades Of Courtroom Experience

Gerald A. Klein, P.C.¹, Mark B. Wilson, P.C. and Michael S. LeBoff, P.C. each have more than 20 years of experience in the courtroom trying “bet the company” cases with millions of dollars at stake. The firm represents both plaintiffs and defendants in business and commercial litigation matters, including contract, partnership, shareholder, real estate, and intellectual property disputes. The firm also represents injured clients in legal malpractice cases. The firm brings its persuasive arguments to life with state-of-the-art multimedia in every big case they try and almost all the cases they try are big cases. Learn more.

A Reputation Built On Winning™

Klein & Wilson has recovered almost $300 million in plaintiffs’ cases and saved almost $1.5 billion in for its clients. The firm’s trial track record speaks for itself. The firm’s attorneys have won over 90 percent of the cases they have taken to trial. It is common for Klein & Wilson to receive telephone calls from the parties they defeat, asking Klein & Wilson to represent them in future matters. Learn more.

Honors & Awards

Daily Journal | Top Professional Responsibility Lawyers | Mar B. Wilson | Klein & Wilson | Newport Beach | 2022
America's Top 100 Bet-The-Company Litigators | 2022 | Top 100
Best Law Firms Ranked by Best Lawyers | United States | 2024
ABOTA | American Board of Trial Advocates
Rated By Super Lawyers | Top 100 | Southern California |
OCTLA | Orange County Trial Lawyers Association | Trial Lawyer of the Year
Preeminent | AV | LexisNexis | Peer Review Rated | Mantindale-Hubbell
Rated By Super Lawyers | Top 50 | Orange County |
Klein & Wilson | 2024 | Recognized By Best Lawyers
FindLaw | Klein & Wilson | 5 stars out of 5 Reviews
State Bar of California | California Board Of Legal Specialization
Lead Counsel Verified | LC
Mark B. Wilson Best Lawyers | Lawyer Of the Year | 2023 | Trade Secrets Law | Orange County, California
Supplement To The Los Angeles And San Francisco Daily Journal | Top Professional Responsibility Lawyers | Mark B. Wilson | Klein & Wilson LLP | Newport Beach | 2024

What Our Clients Say

“I have been practicing law for over 30 years and have had the pleasure of working with Klein & Wilson on dozens of matters. Whenever one of my clients has a civil litigation matter, Klein & Wilson is my first choice for a referral or co-counsel relationship. The firm produces first class work product and is thoroughly prepared. Klein & Wilson always provides my clients with great, cost-effective results, while meeting or exceeding my elevated expectations.”

“Mr. Klein represented our company in one of the longest running litigations (11 years) in the Los Angeles Courts. We prevailed as defendants, after a four-week jury trial, deliberation was short and brief virtually overnight as the jurors saw the truth and ruled in our favor. Klein & Wilson is an extraordinary law firm, I would recommend to any individual, small or large companies. Mr. Klein has the highest integrity which reflects in his personal attention to detail and positive litigation results. Klein & Wilson‘s billing practices are extremely fair based on the amount of detailed work they generate and dedication to their clients. Mr. Klein and his firm deserves the highest award AVVO could bestow on a law firm because they truly represent how an attorney is supposed to represent, respect, and treat clients.”

“Mr. Wilson is a brilliant attorney who works very hard for his clients. He is informed, honest, and a very compassionate individual. From my very first interview with Mr. Wilson I knew he was an attorney who would indeed deliver. Mr. Wilson always made sure I understood every aspect of my case, from the possible outcomes to the overall process. From the very beginning, Mr. Wilson kept me informed of options to take as well as the possible consequences thereof. His knowledge reaches far and is very diverse to say the least; there was never a turn that he did not anticipate. Mr. Wilson always answered all my questions knowledgeably and he always answered phone calls and emails immediately. Mr. Wilson brought my lawsuit to a very satisfying end and he was a blessing to my case.”

Klein & Wilson is an asset to our company – We came to Mr. Wilson through a recommendation by a highly respected retired judge. We couldn’t be happier with the outcome of the case. Mr. Wilson was extremely professional from the initial meeting all the way through the conclusions of the case. His communication skills are exceptional and he spent the time to understand the case fully and make solid recommendations. Mr. Wilson’s tenacity in seeking a resolution to the case was invaluable. We highly recommend him and consider Klein & Wilson an asset to our company.”

“We had a complex case against a large development firm who has around 10 times the net worth of our small company. The large development firm sued us for around $1.5 million after we sued them for around $1million. The case went on for over a year, the large development firm we were up against was extremely stubborn, aggressive, and difficult to work with. With the expertise of our entrusted attorney, Mr. Mark Wilson, the large development firm eventually realized they stood no chance. At the end, we settled with us getting over half a million dollars, while the opposing side didn’t get any money at all. Mr. Mark Wilson was literally god-like during the entire process, he saved our business.

What Sets Klein & Wilson Apart From Other Firms

What makes Klein & Wilson so unique is its combination of trial experience and business acumen. Our trial experience and results speak for themselves. Klein & Wilson is a business. When you hire Klein & Wilson, you talk to its owners. We regularly consult with CPAs, economists, valuation experts, and appraisers. We speak your language. Klein & Wilson has battled some of the finest law firms in the nation and achieved stunning results. In addition to the firm’s litigation success, the firm continues to place a premium on client service.

Klein & Wilson‘s clients receive highly personalized service from a firm that understands the importance of courtesy and professionalism. Our clients are the reason we are in business. Klein & Wilson also assists clients in shareholder disputes, contract disputes, and other commercial litigation matters.

Clients call us when winning is everything. Contact us today at 949-239-0907, or contact the firm by email.

Klein & Wilson Attorneys

Learn More About Our Firm

Business Litigation Practice

Fighting To Protect Your Business

When your business faces challenges to its legal standing and its bottom line, you cannot afford to settle for anything less than proven litigators. Klein & Wilson has an extensive track record in all aspects of business litigation.

Trusted By The World’s Leading Corporations

Klein & Wilson has focused on business litigation for more than 25 years. Their results have not gone unnoticed; some of the leading corporations in the world retain Klein & Wilson to safeguard their interests.