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Ordinance Prohibiting Anti-Competitive Automated Rent Price-Fixing <br />February 17, 2026 <br />Page 2 <br />5 <br />5 <br />8 <br />3 <br />spent an extra $3.8 billion in rent in 2023; Los Angeles renters in units managed with <br />algorithms paid an average of $408 more annually, compared to renters in units not <br />managed with algorithms. <br />Overview of Legislation Addressing Algorithmic Pricing and Antitrust <br />AB 325 Cartwright Act: Violations <br />Assembly Bill 325, enacted on October 6, 2025 and effective January 1, 2026, amends <br />the Cartwright Act to further expand the scope of conduct prohibited under California <br />antitrust law. The bill clarifies that the use of a “common pricing algorithm” may constitute <br />unlawful price fixing when used as part of a contract, combination in the form of a trust, <br />or conspiracy to restrain trade or commerce. AB 325 addresses concerns that pricing <br />software and algorithmic tools can function as mechanisms for coordinating prices, rental <br />rates, or supply levels. By amending the Cartwright Act, AB 325 clarifies that the use of <br />shared or common pricing algorithms may be treated as evidence of a concerted practice <br />when the effect of such use is to artificially influence prices in the real estate market. AB <br />325 does not impose an outright ban on pricing software, instead the bill operates <br />primarily as a clarification of liability standards within the existing antitrust law framework. <br />Enforcement of the Act continues to rely on state or local prosecutors or private parties <br />bringing antitrust actions. <br />Proposed bill - SB 384 Preventing Algorithmic Price Fixing Act <br />Senate Bill 384, the Preventing Algorithmic Price Fixing Act, would make it unlawful for a <br />person to sell, license, provide, or use a “price-setting algorithm” with the intent or <br />reasonable expectation that it will be used by two or more competitors in the same market, <br />when the person knows or should know that the algorithm relies on nonpublic data to <br />determine either: 1) the price or supply of a good or service, or 2) the rent or occupancy <br />level of rental property. <br />Unlike AB 325, SB 384 creates a standalone prohibition on a “price-setting algorithm” <br />when it is intended or can be reasonably expected to be used by two or more competitors <br />in the same market and processes nonpublic data. SB 384 would allow a user of such an <br />algorithm to claim an affirmative defense if they exercised specified reasonable due <br />diligence. It would also authorize the State Attorney General, as well as certain local <br />prosecutors, to bring civil actions for violations, including seeking civil penalties of up to <br />$1,000 per violation. As of February 2026, SB 384 has advanced through the Senate floor <br />and various committees; and is currently undergoing Second Committee Review. <br />Federal and State Antitrust Litigation <br />Antitrust lawsuits have been filed against third-party revenue management companies, <br />including RealPage, Inc. and Yardi Systems, Inc., as well as landlords who are using <br />alleged rent-fixing conspiracies. The lawsuits allege that these companies are enabling <br />unlawful rent-fixing. In August 2024, the United States Department of Justice (DOJ) filed <br />an antitrust lawsuit against RealPage accusing the company of unlawfully reducing <br />market competition and artificially raising rents. Eight state Attorneys General, including