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Guardant Health, Inc. v. Natera, Inc.

  1. April 20, 2026

    Quinn Emanuel May Face More Sanctions In Guardant Fight

    Guardant Health Inc. urged a California federal judge on Monday to make Quinn Emanuel pay nearly $1.3 million on top of $3 million in sanctions already imposed over misrepresentations lawyers made representing its rival Natera Inc., prompting the judge to criticize Quinn Emanuel lawyers for making distinctions so fine they veer into misrepresentation.

  2. July 11, 2025

    Quinn Emanuel Sanctioned For Ad Case 'Misrepresentations'

    A California federal judge imposed almost $3 million in sanctions on Quinn Emanuel Urquhart & Sullivan LLP for what he called the firm's "deliberate misrepresentations" concerning an expert witness in a false advertising suit between medical testing company Guardant Health and rival Natera.

  3. November 25, 2024

    Jury Finds Natera Owes Guardant $292.5M In False Ad Suit

    A California federal jury on Monday awarded $292.5 million in actual and punitive damages to medical test maker Guardant Health after finding that its rival Natera falsely advertised its colorectal cancer test Signatera as superior to Guardant's competing product Reveal.

  4. November 22, 2024

    Natera's Conduct 'Despicable,' Guardant Says As Trial Wraps

    Guardant urged a California federal jury at the close of its false advertising trial Friday to make rival Natera pay it hundreds of millions of dollars, saying the competitor's misrepresentation of the companies' competing cancer detection tests was "despicable," while Natera countered it was Guardant that used deceptive marketing.

  5. November 18, 2024

    'You Stepped Over The Line': Judge Rips Quinn Emanuel Atty

    A California federal judge told a Quinn Emanuel partner defending Natera Inc. at trial Monday in Guardant Health Inc.'s false advertising case that she'd be sanctioned over her questioning of a Natera expert about Guardant's alleged damages, saying, "You stepped over the line, and you did it several times."

  6. November 15, 2024

    Natera Exec Calls Guardant's Cancer Test Claims 'Dangerous'

    Natera's president of clinical diagnostics testified at trial Friday in a California federal false advertising case that Guardant Health's claims about Guardant's competing colorectal cancer test were "false and misleading" and also "dangerous."

  7. November 13, 2024

    Guardant Atty Accuses Natera CEO Of Dishonesty At Trial

    A Guardant Health lawyer on Wednesday accused Natera's CEO of being disingenuous when he testified at trial that a Natera ad campaign was aimed at correcting misleading information Guardant promoted about its competing colorectal cancer tests, exclaiming, "It was about money, wasn't it? Can't you just be honest about that?"

  8. November 12, 2024

    Guardant CEO Says Rival's False Ads Hurt 'Beautiful Baby'

    Guardant Health's CEO testified Tuesday in his company's false advertising suit against Natera Inc. that its rival's "misleading" ad campaign hurt Guardant's colorectal cancer test launch, saying he felt like somebody had taken their "beautiful baby" and "slammed its head against the wall."

  9. November 07, 2024

    Ex-Natera VP Defends Ad Campaign Against Rival Guardant

    A former Natera Inc. marketing vice president defended the company Thursday in a false advertising case launched by Guardant Health Inc., testifying that there was a sales and marketing campaign against Guardant's Reveal colorectal cancer test, but its aim was to address Guardant's "misleading" claims.

  10. November 06, 2024

    Natera Declared 'War' On Guardant, Jury Told At Trial's Start

    Guardant on Wednesday told a California federal jury during opening statements in its false advertising lawsuit that rival Natera saw Guardant's competing colorectal cancer detection test as "an existential threat" and declared "war" while Natera maintained that its ads to doctors comparing the tests were meant "to educate, not deceive."