Trial
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A Track Record of Success
Wilson Sonsini's trial attorneys have achieved numerous significant wins on behalf of clients in antitrust, consumer fraud, and patent litigation matters, as well as in important trade secret, corporate governance, employment, and white collar criminal cases.
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Extensive Lead Trial Counsel and Prosecutorial Experience
Our accomplished litigators have tried several hundred cases as lead trial counsel, and several have previously served as prosecutors in U.S. Attorneys' Offices, the SEC, the DOJ, the NSD, and other federal enforcement agencies.
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Broad Subject Matter Expertise
Since Wilson Sonsini's clients touch virtually every sector of the technology industry, we are well versed in the science and mechanics driving the disruptive innovations often intertwined with legal principles at trial—and can distill complex subjects into understandable concepts for a jury's benefit.
An Accomplished Trial Practice with a Formidable Track Record
Wilson Sonsini has an accomplished Trial practice led by experienced litigators who have amassed a formidable track record of success representing companies, their officers and directors, and individuals in jury and bench trials heard in federal and state courts, as well as contested matters before administrative agencies.
Wilson Sonsini's trial experience—and a substantial percentage of trial wins—can be traced directly to the firm's Antitrust, Consumer Fraud, and Patent Litigation practices, which have garnered significant favorable outcomes on behalf of clients since 2000. Our attorneys have also prevailed at trial in important trade secret, corporate governance, employment, and white collar criminal cases.
Wilson Sonsini's Trial practice has also surged in recent years due to the success we've had representing clients before administrative panels, particularly the International Trade Commission (ITC), the Federal Trade Commission (FTC), and the USPTO's Patent Trial and Appeal Board (PTAB).
Lead Trial Counsel Experience Backed by Diverse Professional Backgrounds
Collectively, Wilson Sonsini's litigators have tried several hundred cases either as lead or co-lead trial counsel. Individually, several of Wilson Sonsini's attorneys have previously held significant roles as prosecutors in U.S. Attorneys' Offices, the SEC, the DOJ, the NSD, and other federal enforcement agencies. Others have held roles as prosecutors in county district attorney offices.
Importantly, Wilson Sonsini's trial attorneys have a broad range of subject matter experience. Because the firm's clients touch virtually every sector of the technology industry, our attorneys have a strong fluency in the science and mechanics driving disruptive innovations that are commonly intertwined with legal principles at trial—and have demonstrated the ability to distill complicated subjects into understandable concepts for the benefit of a jury.
Wilson Sonsini's trial attorneys have achieved the respect of clients, opposing counsel, and jurists alike through their professionalism, ability to manage trial teams, and commitment to achieving the best resolution possible for each client.
Areas of Emphasis
Wilson Sonsini's litigation attorneys have recently represented clients at trial in these key areas, among others:
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Overview
An Accomplished Trial Practice with a Formidable Track Record
Wilson Sonsini has an accomplished Trial practice led by experienced litigators who have amassed a formidable track record of success representing companies, their officers and directors, and individuals in jury and bench trials heard in federal and state courts, as well as contested matters before administrative agencies.
Wilson Sonsini's trial experience—and a substantial percentage of trial wins—can be traced directly to the firm's Antitrust, Consumer Fraud, and Patent Litigation practices, which have garnered significant favorable outcomes on behalf of clients since 2000. Our attorneys have also prevailed at trial in important trade secret, corporate governance, employment, and white collar criminal cases.
Wilson Sonsini's Trial practice has also surged in recent years due to the success we've had representing clients before administrative panels, particularly the International Trade Commission (ITC), the Federal Trade Commission (FTC), and the USPTO's Patent Trial and Appeal Board (PTAB).
Lead Trial Counsel Experience Backed by Diverse Professional Backgrounds
Collectively, Wilson Sonsini's litigators have tried several hundred cases either as lead or co-lead trial counsel. Individually, several of Wilson Sonsini's attorneys have previously held significant roles as prosecutors in U.S. Attorneys' Offices, the SEC, the DOJ, the NSD, and other federal enforcement agencies. Others have held roles as prosecutors in county district attorney offices.
Importantly, Wilson Sonsini's trial attorneys have a broad range of subject matter experience. Because the firm's clients touch virtually every sector of the technology industry, our attorneys have a strong fluency in the science and mechanics driving disruptive innovations that are commonly intertwined with legal principles at trial—and have demonstrated the ability to distill complicated subjects into understandable concepts for the benefit of a jury.
Wilson Sonsini's trial attorneys have achieved the respect of clients, opposing counsel, and jurists alike through their professionalism, ability to manage trial teams, and commitment to achieving the best resolution possible for each client.
Areas of Emphasis
Wilson Sonsini's litigation attorneys have recently represented clients at trial in these key areas, among others:
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Client Highlights
Firm Obtains Complete Jury Victory for Cyntec in Patent Validity Trial
On March 5, 2026, Wilson Sonsini Goodrich & Rosati secured a complete jury victory in a patent invalidity trial in the U.S. District Court for the Northern District of California on behalf of firm client Cyntec Company, Ltd. Rejecting defendant Chilisin’s arguments on obviousness, the jury found that all asserted claims of Cyntec’s U.S. Patent Nos. 8,922,312 and 9,481,037 were valid. Wilson Sonsini also represented Cyntec in a previous jury trial which had found that Chilisin willfully infringed both patents and imposed a 5 percent royalty.
News Articles
Matt Macdonald Named Among LABJ's Leaders of Influence: Litigators and Trial Attorneys 2025
On July 14, 2025, Wilson Sonsini litigation partner Matt Macdonald was honored among Los Angeles Business Journal's "Leaders of Influence: Litigators and Trial Attorneys 2025." The special supplement recognizes the very best litigators and trial attorneys in the region.
Client Highlights
Wilson Sonsini Secures Jury Trial Victory for Google in Case Alleging Misuse of Advertising Technology
On June 10, 2025, Wilson Sonsini secured a complete defense verdict from a Los Angeles jury in ReactX LLC v. Google LLC. ReactX sought $1.3 billion in damages, alleging that Google breached a series of contracts by misusing ReactX’s confidential technology to build two of Google’s most successful digital advertising products. ReactX originally brought the case as one for trade secret misappropriation, but just two weeks before trial, it voluntarily dismissed its trade secret cause of action. The court further trimmed ReactX’s lawsuit in response to nonsuit motions brought by Wilson Sonsini, ruling that Google was bound by only one of the contracts asserted by ReactX and dismissing ReactX’s cause of action for breach of the implied covenant of good faith and fair dealing. After a six-week trial featuring 17 witnesses, the jury completely vindicated Google on ReactX’s remaining cause of action for breach of contract.
The Wilson Sonsini team representing Google in the matter was led by partners Colleen Bal, John Flynn, Tait Graves, Josh Baskin, and Lucy Yen, and included Andrew Alderette, Stephanie Cheng, Kayla Dessel, Katherine Ericson, Celine Liu, Sachli Nayeri, Courtney Reed, Matt Donohue, Doug Brockmeier, Sissel Browder, Shannon Hill, and Pamela Sandillo.
The Wilson Sonsini team representing Google in the matter was led by partners Colleen Bal, John Flynn, Tait Graves, Josh Baskin, and Lucy Yen, and included Andrew Alderette, Stephanie Cheng, Kayla Dessel, Katherine Ericson, Celine Liu, Sachli Nayeri, Courtney Reed, Matt Donohue, Doug Brockmeier, Sissel Browder, Shannon Hill, and Pamela Sandillo.
Client Highlights
Wilson Sonsini Secures Second Circuit Victory for RWE Clean Energy
On May 13, 2025, the U.S. Court of Appeals for the Second Circuit summarily affirmed a trial decision dismissing a $70 million claim against RWE Clean Energy involving the construction of the Cassadaga project, a wind farm in upstate New York.
Client Highlights
Wilson Sonsini Secures Complete Jury Trial Victory for Via Transportation
On January 30, 2025, firm client and microtransit leader Via won a complete victory against its competitor, RideCo, following a seven-day jury trial and years of litigation in the U.S. District Court for the Western District of Texas. After less than 3 hours of deliberation, the jury found that RideCo infringed three of Via’s patents on its virtual bus stop technology (U.S. Patent Nos. 9,562,785, 9,816,824, and 10,197,411) and ordered RideCo to pay damages, with total pretrial and ongoing damages to be determined. Via also prevailed against RideCo’s counterclaims, with the jury finding that Via did not infringe either of RideCo’s two asserted patents.
Insights
Client Highlights
Firm Obtains Complete Jury Victory for Cyntec in Patent Validity Trial
On March 5, 2026, Wilson Sonsini Goodrich & Rosati secured a complete jury victory in a patent invalidity trial in the U.S. District Court for the Northern District of California on behalf of firm client Cyntec Company, Ltd. Rejecting defendant Chilisin’s arguments on obviousness, the jury found that all asserted claims of Cyntec’s U.S. Patent Nos. 8,922,312 and 9,481,037 were valid. Wilson Sonsini also represented Cyntec in a previous jury trial which had found that Chilisin willfully infringed both patents and imposed a 5 percent royalty.
News Articles
Matt Macdonald Named Among LABJ's Leaders of Influence: Litigators and Trial Attorneys 2025
On July 14, 2025, Wilson Sonsini litigation partner Matt Macdonald was honored among Los Angeles Business Journal's "Leaders of Influence: Litigators and Trial Attorneys 2025." The special supplement recognizes the very best litigators and trial attorneys in the region.
Client Highlights
Wilson Sonsini Secures Jury Trial Victory for Google in Case Alleging Misuse of Advertising Technology
On June 10, 2025, Wilson Sonsini secured a complete defense verdict from a Los Angeles jury in ReactX LLC v. Google LLC. ReactX sought $1.3 billion in damages, alleging that Google breached a series of contracts by misusing ReactX’s confidential technology to build two of Google’s most successful digital advertising products. ReactX originally brought the case as one for trade secret misappropriation, but just two weeks before trial, it voluntarily dismissed its trade secret cause of action. The court further trimmed ReactX’s lawsuit in response to nonsuit motions brought by Wilson Sonsini, ruling that Google was bound by only one of the contracts asserted by ReactX and dismissing ReactX’s cause of action for breach of the implied covenant of good faith and fair dealing. After a six-week trial featuring 17 witnesses, the jury completely vindicated Google on ReactX’s remaining cause of action for breach of contract.
The Wilson Sonsini team representing Google in the matter was led by partners Colleen Bal, John Flynn, Tait Graves, Josh Baskin, and Lucy Yen, and included Andrew Alderette, Stephanie Cheng, Kayla Dessel, Katherine Ericson, Celine Liu, Sachli Nayeri, Courtney Reed, Matt Donohue, Doug Brockmeier, Sissel Browder, Shannon Hill, and Pamela Sandillo.
The Wilson Sonsini team representing Google in the matter was led by partners Colleen Bal, John Flynn, Tait Graves, Josh Baskin, and Lucy Yen, and included Andrew Alderette, Stephanie Cheng, Kayla Dessel, Katherine Ericson, Celine Liu, Sachli Nayeri, Courtney Reed, Matt Donohue, Doug Brockmeier, Sissel Browder, Shannon Hill, and Pamela Sandillo.
Client Highlights
Wilson Sonsini Secures Second Circuit Victory for RWE Clean Energy
On May 13, 2025, the U.S. Court of Appeals for the Second Circuit summarily affirmed a trial decision dismissing a $70 million claim against RWE Clean Energy involving the construction of the Cassadaga project, a wind farm in upstate New York.
Client Highlights
Wilson Sonsini Secures Complete Jury Trial Victory for Via Transportation
On January 30, 2025, firm client and microtransit leader Via won a complete victory against its competitor, RideCo, following a seven-day jury trial and years of litigation in the U.S. District Court for the Western District of Texas. After less than 3 hours of deliberation, the jury found that RideCo infringed three of Via’s patents on its virtual bus stop technology (U.S. Patent Nos. 9,562,785, 9,816,824, and 10,197,411) and ordered RideCo to pay damages, with total pretrial and ongoing damages to be determined. Via also prevailed against RideCo’s counterclaims, with the jury finding that Via did not infringe either of RideCo’s two asserted patents.
Affiliated Programs
Association of Corporate Counsel San Francisco Bay Area IP Symposium (Virtual)
Wilson Sonsini partners Colleen Bal, John Flynn, and Josh Baskin and Jeremy Gray, Assistant General Counsel with Circle will present "Ruptured Relationships and Trade Secrets: Thinking Ahead to Trial so That You Won’t Be on Trial,” on September 25 from 3:00 to 4:00 p.m.
Speaking Engagements
MassArbCon Tech Legal 2023
MassArbCon is a comprehensive two-day summit to discuss strategies and trends regarding mass action arbitration. The conference brings subject matter and legal experts involved in different aspects of the law to help attorneys learn about the intricacies of mass actions — from client intake to management, mediations, negotiation, administration, business development, and how law firms can implement technology and automation to lead to digital transformation. Over the past two years, MassArbCon has created a community that celebrates diversity, fosters inclusion, and upholds civility in the legal industry by blending technology and legal expertise.
Affiliated Programs
Race, Religion, and the Corporation: What Could Possibly Go Wrong?
Two Supreme Court decisions issued on June 29, 2023, promise to fundamentally reshape the relationship between employers and employees. These decisions will make it easier for employees to obtain religious accommodations, and harder for employers to promote diversity. In Groff v. DeJoy, the Court held that Title VI of the Civil Rights Act of 1964 requires that employers grant religious accommodations unless doing so imposes a “substantial” hardship on the employer. This standard is significantly more burdensome for employers than the pre-existing de minimis burden test, and could lead to a sharp increase in demands for religious accommodations. In cases against Harvard and the University of North Carolina at Chapel Hill, the Court ruled that the universities’ affirmative action admissions programs violate the Constitution’s equal protection clause. The decision effectively ends race-conscious admissions programs, and leaves many businesses concerned about the legality of race-based preferences in hiring, promotions, and contracting. Republican state attorneys general have already sent a letter to CEOs of the 100 largest U.S. companies arguing that the decision also applies to private employers in an effort to force employers to roll back DEI programs and commitments.
Speaking Engagements
Navigating the Law of Trade Secrets and Restrictive Covenants
This two-day program, focusing on trade secret law, will examine some of an organization’s most valuable assets, from cutting-edge technologies to profit-enhancing improvements and beyond. The first half-day session will cover the fundamentals of trade secret law and the laws governing the creation, identification, and protection of trade secrets—including the drafting of agreements governing trade secret use and remedies for misappropriation. The second half-day session will be a more in-depth analysis of trade secrets litigation, mega-verdicts, and recent federal enforcement of restrictive covenant agreements deemed to be violations of the antitrust laws. The panels will include esteemed judges, in-house counsel, representatives from government agencies, and top practitioners examining both the plaintiff and defense side of the law. IP lawyers, employment lawyers, general counsel, and executives should attend.
Affiliated Programs
The McCarthy Institute Distinguished Lecture Series - "The Future of Trade Secret Law"
The McCarthy Institute and the Sandra Day O’Connor College of Law at Arizona State University are delighted to announce that the article “From Trade Secrecy to Seclusion,” authored by Charles Tait Graves and Sonia K. Katyal, has won the McCarthy Scholarship Award contest.
Events
Affiliated Programs
Association of Corporate Counsel San Francisco Bay Area IP Symposium (Virtual)
Wilson Sonsini partners Colleen Bal, John Flynn, and Josh Baskin and Jeremy Gray, Assistant General Counsel with Circle will present "Ruptured Relationships and Trade Secrets: Thinking Ahead to Trial so That You Won’t Be on Trial,” on September 25 from 3:00 to 4:00 p.m.
Speaking Engagements
MassArbCon Tech Legal 2023
MassArbCon is a comprehensive two-day summit to discuss strategies and trends regarding mass action arbitration. The conference brings subject matter and legal experts involved in different aspects of the law to help attorneys learn about the intricacies of mass actions — from client intake to management, mediations, negotiation, administration, business development, and how law firms can implement technology and automation to lead to digital transformation. Over the past two years, MassArbCon has created a community that celebrates diversity, fosters inclusion, and upholds civility in the legal industry by blending technology and legal expertise.
Affiliated Programs
Race, Religion, and the Corporation: What Could Possibly Go Wrong?
Two Supreme Court decisions issued on June 29, 2023, promise to fundamentally reshape the relationship between employers and employees. These decisions will make it easier for employees to obtain religious accommodations, and harder for employers to promote diversity. In Groff v. DeJoy, the Court held that Title VI of the Civil Rights Act of 1964 requires that employers grant religious accommodations unless doing so imposes a “substantial” hardship on the employer. This standard is significantly more burdensome for employers than the pre-existing de minimis burden test, and could lead to a sharp increase in demands for religious accommodations. In cases against Harvard and the University of North Carolina at Chapel Hill, the Court ruled that the universities’ affirmative action admissions programs violate the Constitution’s equal protection clause. The decision effectively ends race-conscious admissions programs, and leaves many businesses concerned about the legality of race-based preferences in hiring, promotions, and contracting. Republican state attorneys general have already sent a letter to CEOs of the 100 largest U.S. companies arguing that the decision also applies to private employers in an effort to force employers to roll back DEI programs and commitments.
Speaking Engagements
Navigating the Law of Trade Secrets and Restrictive Covenants
This two-day program, focusing on trade secret law, will examine some of an organization’s most valuable assets, from cutting-edge technologies to profit-enhancing improvements and beyond. The first half-day session will cover the fundamentals of trade secret law and the laws governing the creation, identification, and protection of trade secrets—including the drafting of agreements governing trade secret use and remedies for misappropriation. The second half-day session will be a more in-depth analysis of trade secrets litigation, mega-verdicts, and recent federal enforcement of restrictive covenant agreements deemed to be violations of the antitrust laws. The panels will include esteemed judges, in-house counsel, representatives from government agencies, and top practitioners examining both the plaintiff and defense side of the law. IP lawyers, employment lawyers, general counsel, and executives should attend.
Affiliated Programs
The McCarthy Institute Distinguished Lecture Series - "The Future of Trade Secret Law"
The McCarthy Institute and the Sandra Day O’Connor College of Law at Arizona State University are delighted to announce that the article “From Trade Secrecy to Seclusion,” authored by Charles Tait Graves and Sonia K. Katyal, has won the McCarthy Scholarship Award contest.
Colleen Bal
Partner
Colleen is a nationally recognized trial lawyer with a proven track record of handling difficult and high-profile cases for leading technology, life sciences, and financial companies.
Christopher Chiou
Partner
Chris Chiou is a litigation partner in the Los Angeles office of Wilson Sonsini Goodrich & Rosati. He represents clients in high-stakes complex commercial litigation and investigations, with an emphasis on business disputes. Chris is experienced in all stages of litigation, from counseling clients before lawsuits are filed through trying cases before juries. He also leads internal investigations on behalf of corporations and advises them on compliance issues, including providing Foreign Corrupt Practices Act training to executives at multinational companies. Chris is certified by the International Association of Privacy Professionals in information privacy and data protection.
Before joining the firm, Chris served as Acting U.S. Attorney for the District of Nevada. As the district’s chief federal law enforcement officer, he oversaw criminal and civil cases brought on behalf of the United States, including financial litigation cases, and prosecuted cybercrime (particularly ransomware and business email compromise), white collar crime, and public corruption. In 2021, Chris served on a nationwide task force to determine how the U.S. Department of Justice can more effectively combat hate crimes and hate incidents.
Chris was previously a partner at Jenner & Block, where he helped start the Los Angeles office in 2009.
Before joining the firm, Chris served as Acting U.S. Attorney for the District of Nevada. As the district’s chief federal law enforcement officer, he oversaw criminal and civil cases brought on behalf of the United States, including financial litigation cases, and prosecuted cybercrime (particularly ransomware and business email compromise), white collar crime, and public corruption. In 2021, Chris served on a nationwide task force to determine how the U.S. Department of Justice can more effectively combat hate crimes and hate incidents.
Chris was previously a partner at Jenner & Block, where he helped start the Los Angeles office in 2009.
Leo Cunningham
Partner
Leo is a former federal prosecutor who represents clients in sensitive litigation matters, including federal and state court trials.
John P. Flynn
Partner
John is a veteran trial lawyer with 30 years of experience in high-stakes, enterprise-threatening corporate and commercial litigation.
Charles Tait Graves
Partner
Tait represents clients in trade secret disputes and provides strategic legal counsel on complex trade secret issues.
Ariel C. Green Anaba
Partner
Ariel C. Green Anaba is a trial and appellate attorney in the Los Angeles office of Wilson Sonsini Goodrich & Rosati who represents plaintiffs and defendants in high-stakes disputes. Her experience teaching complicated subjects like cell biology and chemistry allows her to distill complex problems into a cohesive narrative that resonates with juries and jurists.
Tina Hanson
Partner
Kristina Hanson is a partner in the San Francisco office of Wilson Sonsini Goodrich & Rosati. Her practice primarily focuses on intellectual property litigation, with an emphasis on pharmaceutical patent matters arising under the Hatch-Waxman Act. She has represented clients in a variety of pharmaceutical matters, from pre-trial strategy counseling through appeals.
Tarek J. Helou
Partner
Tarek represents companies in internal investigations and defends companies and individuals in significant and multi-jurisdictional government enforcement actions.
Steffen N. Johnson
Partner
Steffen Johnson is an experienced appellate practitioner who co-chairs the firm's national Supreme Court and Appellate practice.
John Karin
Partner
John is a partner with experience managing all stages of large, bet-the-company litigation across the United States and abroad.
People
Colleen Bal
Partner
Colleen is a nationally recognized trial lawyer with a proven track record of handling difficult and high-profile cases for leading technology, life sciences, and financial companies.
Christopher Chiou
Partner
Chris Chiou is a litigation partner in the Los Angeles office of Wilson Sonsini Goodrich & Rosati. He represents clients in high-stakes complex commercial litigation and investigations, with an emphasis on business disputes. Chris is experienced in all stages of litigation, from counseling clients before lawsuits are filed through trying cases before juries. He also leads internal investigations on behalf of corporations and advises them on compliance issues, including providing Foreign Corrupt Practices Act training to executives at multinational companies. Chris is certified by the International Association of Privacy Professionals in information privacy and data protection.
Before joining the firm, Chris served as Acting U.S. Attorney for the District of Nevada. As the district’s chief federal law enforcement officer, he oversaw criminal and civil cases brought on behalf of the United States, including financial litigation cases, and prosecuted cybercrime (particularly ransomware and business email compromise), white collar crime, and public corruption. In 2021, Chris served on a nationwide task force to determine how the U.S. Department of Justice can more effectively combat hate crimes and hate incidents.
Chris was previously a partner at Jenner & Block, where he helped start the Los Angeles office in 2009.
Before joining the firm, Chris served as Acting U.S. Attorney for the District of Nevada. As the district’s chief federal law enforcement officer, he oversaw criminal and civil cases brought on behalf of the United States, including financial litigation cases, and prosecuted cybercrime (particularly ransomware and business email compromise), white collar crime, and public corruption. In 2021, Chris served on a nationwide task force to determine how the U.S. Department of Justice can more effectively combat hate crimes and hate incidents.
Chris was previously a partner at Jenner & Block, where he helped start the Los Angeles office in 2009.
Leo Cunningham
Partner
Leo is a former federal prosecutor who represents clients in sensitive litigation matters, including federal and state court trials.
John P. Flynn
Partner
John is a veteran trial lawyer with 30 years of experience in high-stakes, enterprise-threatening corporate and commercial litigation.
Charles Tait Graves
Partner
Tait represents clients in trade secret disputes and provides strategic legal counsel on complex trade secret issues.
Ariel C. Green Anaba
Partner
Ariel C. Green Anaba is a trial and appellate attorney in the Los Angeles office of Wilson Sonsini Goodrich & Rosati who represents plaintiffs and defendants in high-stakes disputes. Her experience teaching complicated subjects like cell biology and chemistry allows her to distill complex problems into a cohesive narrative that resonates with juries and jurists.
Tina Hanson
Partner
Kristina Hanson is a partner in the San Francisco office of Wilson Sonsini Goodrich & Rosati. Her practice primarily focuses on intellectual property litigation, with an emphasis on pharmaceutical patent matters arising under the Hatch-Waxman Act. She has represented clients in a variety of pharmaceutical matters, from pre-trial strategy counseling through appeals.
Tarek J. Helou
Partner
Tarek represents companies in internal investigations and defends companies and individuals in significant and multi-jurisdictional government enforcement actions.
Steffen N. Johnson
Partner
Steffen Johnson is an experienced appellate practitioner who co-chairs the firm's national Supreme Court and Appellate practice.
John Karin
Partner
John is a partner with experience managing all stages of large, bet-the-company litigation across the United States and abroad.
Recent Insights
Client Highlights
Firm Obtains Complete Jury Victory for Cyntec in Patent Validity Trial
On March 5, 2026, Wilson Sonsini Goodrich & Rosati secured a complete jury victory in a patent invalidity trial in the U.S. District Court for the Northern District of California on behalf of firm client Cyntec Company, Ltd. Rejecting defendant Chilisin’s arguments on obviousness, the jury found that all asserted claims of Cyntec’s U.S. Patent Nos. 8,922,312 and 9,481,037 were valid. Wilson Sonsini also represented Cyntec in a previous jury trial which had found that Chilisin willfully infringed both patents and imposed a 5 percent royalty.
Learn More
News Articles
Matt Macdonald Named Among LABJ's Leaders of Influence: Litigators and Trial Attorneys 2025
On July 14, 2025, Wilson Sonsini litigation partner Matt Macdonald was honored among Los Angeles Business Journal's "Leaders of Influence: Litigators and Trial Attorneys 2025." The special supplement recognizes the very best litigators and trial attorneys in the region.
Learn More
Recent Events
Affiliated Programs
Association of Corporate Counsel San Francisco Bay Area IP Symposium (Virtual)
Wilson Sonsini partners Colleen Bal, John Flynn, and Josh Baskin and Jeremy Gray, Assistant General Counsel with Circle will present "Ruptured Relationships and Trade Secrets: Thinking Ahead to Trial so That You Won’t Be on Trial,” on September 25 from 3:00 to 4:00 p.m.
Learn More
Speaking Engagements
MassArbCon Tech Legal 2023
MassArbCon is a comprehensive two-day summit to discuss strategies and trends regarding mass action arbitration. The conference brings subject matter and legal experts involved in different aspects of the law to help attorneys learn about the intricacies of mass actions — from client intake to management, mediations, negotiation, administration, business development, and how law firms can implement technology and automation to lead to digital transformation. Over the past two years, MassArbCon has created a community that celebrates diversity, fosters inclusion, and upholds civility in the legal industry by blending technology and legal expertise.
Learn More
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