Live Updates #2 - ABA Antitrust Spring Meeting 2026

Why It Matters

State‑level actions can reshape merger scrutiny and compliance strategies, forcing businesses to navigate a patchwork of regulations beyond federal oversight.

Key Takeaways

• State AGs fill gaps left by federal antitrust enforcement
• California bans pricing algorithms, raises penalties for violations
• Uniform Pre‑merger Notification Act spreading to multiple states
• Private plaintiffs favor post‑merger suits to avoid ripeness issues
• Federal merger review perceived as stalled, prompting state challenges

Pulse Analysis

The antitrust arena is undergoing a noticeable realignment as the Department of Justice and the FTC appear to scale back aggressive merger reviews. This vacuum has encouraged state attorneys general to assert more independent authority, leveraging local statutes to address competitive harms that might otherwise slip through federal nets. Companies now face a dual‑track risk environment, where a deal cleared in Washington could still trigger scrutiny in state courts or before state AGs, demanding more granular, jurisdiction‑specific compliance planning.

California’s recent legislative package exemplifies the heightened state focus. By criminalizing the exchange of pricing algorithms and imposing steeper fines, the state sends a clear signal that data‑driven collusion will be met with swift enforcement. The move also introduces a novel single‑firm monopolization cause of action, expanding the toolkit for both regulators and private plaintiffs. Meanwhile, a growing coalition of states is adopting the Uniform Pre‑merger Notification Act, a streamlined “mini‑HSR” system that obliges parties to disclose transaction details without the full burden of federal filing, thereby accelerating early‑stage review and reducing uncertainty for dealmakers.

Private litigants are adapting their strategies to this evolving landscape. Rather than confronting the procedural hurdles of pre‑merger suits, many opt to wait until a merger closes, filing for injunctive relief or damages when the competitive impact is concrete. This approach sidesteps ripeness and standing challenges that often derail earlier actions. For businesses, the takeaway is clear: robust antitrust risk assessments must now incorporate state‑level dynamics, from California’s algorithm bans to emerging mini‑HSR regimes, and anticipate a rise in post‑merger litigation as a primary enforcement vector.