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  1. | Home
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  3. | John J. Bartko

John J. Bartko

Founder

San Francisco

  • 415.956.1900
  • 415.291.4515
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John J. Bartko is a Founder and Partner of Bartko Pavia LLP and has decades of experience representing both plaintiffs and defendants in complex civil, criminal, and regulatory matters.  His experience includes representing various parties in complicated financial fraud and environmental law cases. John has represented many executives ensnared in regulatory investigations and is recognized as a leading white collar criminal defense attorney, most notably as lead trial counsel in a criminal antitrust case where he successfully defended a U.S. executive accused of international price fixing even though the government had obtained 17 guilty pleas from other defendants. One of his trials was nationally televised on Court TV.

John also has significant international experience, having been involved in international discovery and complex investigations requiring foreign court appearances, including conducting examinations in Switzerland and Japan through pioneering requests for civil judicial assistance. He has traveled to Europe, Asia, and South Africa to obtain evidence for American civil and criminal proceedings and has represented foreign officials in U.S. legal matters.

John’s recent arbitrations include the representation of a technology company’s founders against purchasers and financial advisors in claims arising from exit strategies. John has also represented U.S. companies in claims arising from international transactions involving joint ventures and real estate investments. In shareholder cases, John has represented corporations, directors, officers, and shareholders in antitrust, finance, real estate, technology, and other businesses and in state and federal litigation and governmental investigations. In addition, he has represented clients in professional malpractice claims and in other litigation concerning the departure of officers, partners, and shareholders.

Credentials

Education

  • University of California, Berkeley, School of Law, J.D.
  • University of California, Los Angeles, B.A.

Bar Admissions

  • State Bar of California

Court Admissions

  • United States Court of Appeals for the Ninth Circuit
  • United States District Court for the Northern District of California
  • United States District Court for the Eastern District of California
  • United States District Court for the Southern District of California
  • United States District Court for the Central District of California
  • United States District Court for the District of Hawaii

Recognitions

  • Named as a Northern California Super Lawyer (2005-2025)
  • Recognized by “Best Lawyers,” Commercial Litigation and White Collar Criminal Defense (2013-2025)
  • Martindale-Hubbell Peer Review, AV Rating, 5 Stars  

Experience

  • John successfully represented landowners in pioneering environmental regulation matters resolved by the U.S. Supreme Court in Lake County Estates v. Tahoe Reg. Planning Agency, 440 U.S. 391 (1979).

Insights

Honors and Awards

01, January 2025

Bartko LLP Attorneys Recognized as Best Lawyers® Award Recipients

We’re proud to announce that four Bartko, LLP attorneys have been named in the 2025 edition of The Best Lawyers in America®. Best Lawyers is the oldest and most respected lawyer ranking service, using a peer-review process to ensure credibility and trust. Since it was first published in 1983, Best Lawyers has become universally regarded as the definitive guide to legal excellence.

Honors and Awards

10, November 2023

Five Bartko Lawyers Recognized as 2024 Best Lawyers® Award Recipients

Bartko LLP is pleased to announce that five lawyers have been included in the 2024 edition of The Best Lawyers in America®. Since it was first published in 1983, Best Lawyers has become universally regarded as the definitive guide to legal excellence.

Publications

  • John’s many speaking appearances include presentations at the American Law Institute, American Bar Association, and Practicing Law Institute where he discussed internal corporate investigations, international discovery, and trial practice.

Areas of Focus

Practices

  • Intellectual Property
  • Litigation

Insights & News

Publications

05, September 2025

Client Alert: Texas Telemarketing Law Expands To Texts - Key Requirements

Effective September 1, 2025, SB 140 expands Texas’ telemarketing law to cover SMS/MMS and image messages. Businesses who send marketing texts from Texas or to persons located in Texas must register with the Texas Secretary of State ($200 filing fee; $10,000 security deposit).

Learn more

Speaking Engagements

04, September 2025

An Nguyen Ruda and Josiah Jenkins Present for the San Francisco Employer Advisory Council

Bartko Pavia's CEO & Co-Managing partner An Nguyen Ruda and associate Josiah Jenkins will present for the (SF EAC) California Employer Advisory Council on DEI: A New Four-Letter Bad Word and What It Means in this New Environment on September 11th, in San Francisco. This seminar features discussions on the latest legal changes impacting DEI programs, compliance strategies and risk-reduction tacticsand how to design DEI initiatives that align with today’s shifting landscape

Learn more

Media Mentions

07, August 2025

Law360 Spotlights Ian Papendick’s Arrival at Bartko Pavia

Ian Papendick, a seasoned antitrust attorney and former enforcer with the Colorado Attorney General’s Office, was recently featured in Law360 following his arrival at Bartko Pavia LLP as a litigation and antitrust partner.

Learn more

Press Release

30, October 2025

An Ruda Serves as Judge at the Berkeley Female Founders & Funders Summit

Learn more

Media Mentions

27, October 2025

Steve Vieux Featured in Law360 Coverage of the California Lawyers Association’s Golden State Institute

Learn more

Press Release

09, October 2025

Steve Vieux to Chair the California Lawyers Association’s Golden State Institute

Learn more

Press Release

08, October 2025

Melissa Harvey to Present at ICSC on Non-Retail Development in Shopping Centers

Learn more

Publications

06, October 2025

Meredith Vanderbilt Publishes Article in AHLA Health Law Weekly on FDA Drug Shortage Tracking

Learn more

Press Release

03, October 2025

Howland Gordon to Participate in ICSC Mock Negotiation on Anchor Exclusives

Learn more

Press Release

29, September 2025

ABA Antitrust Plaintiffs’ Roundtable Will Feature Insights from Ian Papendick

Learn more

Press Release

24, September 2025

David Graham to Speak at NRTA Conference

Learn more

Honors and Awards

23, September 2025

Patrick M. Ryan Earns Repeat Recognition as 2025 Top 100 Lawyer

Learn more

Publications

05, September 2025

Client Alert: Texas Telemarketing Law Expands To Texts - Key Requirements

Effective September 1, 2025, SB 140 expands Texas’ telemarketing law to cover SMS/MMS and image messages. Businesses who send marketing texts from Texas or to persons located in Texas must register with the Texas Secretary of State ($200 filing fee; $10,000 security deposit).

Learn more

Speaking Engagements

04, September 2025

An Nguyen Ruda and Josiah Jenkins Present for the San Francisco Employer Advisory Council

Bartko Pavia's CEO & Co-Managing partner An Nguyen Ruda and associate Josiah Jenkins will present for the (SF EAC) California Employer Advisory Council on DEI: A New Four-Letter Bad Word and What It Means in this New Environment on September 11th, in San Francisco. This seminar features discussions on the latest legal changes impacting DEI programs, compliance strategies and risk-reduction tacticsand how to design DEI initiatives that align with today’s shifting landscape

Learn more

Media Mentions

07, August 2025

Law360 Spotlights Ian Papendick’s Arrival at Bartko Pavia

Ian Papendick, a seasoned antitrust attorney and former enforcer with the Colorado Attorney General’s Office, was recently featured in Law360 following his arrival at Bartko Pavia LLP as a litigation and antitrust partner.

Learn more

Press Release

30, October 2025

An Ruda Serves as Judge at the Berkeley Female Founders & Funders Summit

Learn more

Media Mentions

27, October 2025

Steve Vieux Featured in Law360 Coverage of the California Lawyers Association’s Golden State Institute

Learn more

Press Release

09, October 2025

Steve Vieux to Chair the California Lawyers Association’s Golden State Institute

Learn more

Press Release

08, October 2025

Melissa Harvey to Present at ICSC on Non-Retail Development in Shopping Centers

Learn more

Publications

06, October 2025

Meredith Vanderbilt Publishes Article in AHLA Health Law Weekly on FDA Drug Shortage Tracking

Learn more

Press Release

03, October 2025

Howland Gordon to Participate in ICSC Mock Negotiation on Anchor Exclusives

Learn more

Press Release

29, September 2025

ABA Antitrust Plaintiffs’ Roundtable Will Feature Insights from Ian Papendick

Learn more

Press Release

24, September 2025

David Graham to Speak at NRTA Conference

Learn more

Honors and Awards

23, September 2025

Patrick M. Ryan Earns Repeat Recognition as 2025 Top 100 Lawyer

Learn more

Publications

05, September 2025

Client Alert: Texas Telemarketing Law Expands To Texts - Key Requirements

Effective September 1, 2025, SB 140 expands Texas’ telemarketing law to cover SMS/MMS and image messages. Businesses who send marketing texts from Texas or to persons located in Texas must register with the Texas Secretary of State ($200 filing fee; $10,000 security deposit).

Learn more

Speaking Engagements

04, September 2025

An Nguyen Ruda and Josiah Jenkins Present for the San Francisco Employer Advisory Council

Bartko Pavia's CEO & Co-Managing partner An Nguyen Ruda and associate Josiah Jenkins will present for the (SF EAC) California Employer Advisory Council on DEI: A New Four-Letter Bad Word and What It Means in this New Environment on September 11th, in San Francisco. This seminar features discussions on the latest legal changes impacting DEI programs, compliance strategies and risk-reduction tacticsand how to design DEI initiatives that align with today’s shifting landscape

Learn more

Media Mentions

07, August 2025

Law360 Spotlights Ian Papendick’s Arrival at Bartko Pavia

Ian Papendick, a seasoned antitrust attorney and former enforcer with the Colorado Attorney General’s Office, was recently featured in Law360 following his arrival at Bartko Pavia LLP as a litigation and antitrust partner.

Learn more

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