California Assembly Passes Antitrust Bill Allowing Private Lawsuits

Under current California law, such cases generally require evidence that two or more parties collaborated to limit competition. Federal law already permits single-party enforcement, but supporters of the bill argue federal courts have narrowed antitrust protections.

She said the measure would help keep independent grocery stores and pharmacies open and give patients more health-care choices. Labor unions and trial lawyers have backed the legislation.

They argue it would expose companies of all sizes to costly litigation from competitors and plaintiffs' attorneys. Pepperdine law professor Babette Boliek said the language is vague and could let judges decide cases based on subjective views rather than measurable harm.

Aguiar-Curry said she would incorporate most of Umberg's requested changes but has not agreed to restrict private enforcement.