On October 11, 2025, California Governor Gavin Newsom signed Senate Bill 41 (SB-41) into law, introducing a comprehensive set of new regulations for pharmacy benefit managers (PBMs) operating in the state. As part of the broader California Prescription Drug Affordability legislative package, SB-41 reflects the state’s effort to combat high drug costs, standardize PBM pricing practices, enhance transparency, and address concerns around access to pharmacies. Among other things, SB-41 imposes fiduciary obligations on PBMs, establishes fee structure requirements and limitations, prohibits the use of spread pricing and steering to PBM-affiliated pharmacies, and requires 100% passthrough of rebates from PBMs and their affiliates and contracted rebate group purchasing organizations (GPOs) to health plan customers.

California legislative activity focused upon private equity (PE) group and hedge fund health care transactions has continued notwithstanding California Governor Gavin Newsom’s veto last fall of California Assembly Bill 3129 (AB-3129). As we discussed in previous posts here and here, AB-3129 would have authorized the California Attorney General (AG) to review certain PE group and hedge fund health care transactions, but Governor Newsom vetoed the bill based on his view that the California Office of Health Care Affordability (OHCA) rather than the AG should be assessing proposed health care transactions and their cost and market impacts.

The first week of October 2025 marked a significant shift in U.S. drug pricing policy as the Trump administration unveiled a series of sweeping actions to deliver on his promise to lower drug prices. From President Trump’s announcement of a 100% tariff on imported branded drugs to the Trump administration’s landmark pricing deal with Pfizer and the rollout of the TrumpRx.gov direct-to-consumer (DTC) platform, last week marked an escalation in the White House’s efforts to drive down prescription drug costs and bring pharmaceutical manufacturing back to U.S. soil. Below, we provide an overview of the Trump administration’s new policies and the stakeholder responses already reshaping the broader pharmaceutical landscape.

On May 12, 2025, the Centers for Medicare & Medicaid Services (CMS) issued draft guidance for the third cycle of the IRA’s Medicare Drug Price Negotiation Program (Negotiation Program).

Federal courts continue to uphold the Medicare Drug Price Negotiation Program, with multiple rulings emphasizing the voluntary nature of manufacturer participation. Key legal challenges from AstraZeneca, Boehringer Ingelheim, PhRMA, and others face setbacks as the government remains undefeated.

President Trump issues executive orders and letters to curb drug costs, promote MFN pricing, and reform Medicare’s Negotiation Program.

PhRMA’s 2025 agenda pushes back on drug pricing reforms, calling for innovation-friendly policies, 340B reform, and PBM accountability.

The CY 2026 Physician Fee Schedule Proposed Rule (PFS Proposed Rule) introduces significant changes to how drug manufacturers must treat Bona Fide Service Fees (BFSFs) when calculating Average Sales Price (ASP) for Medicare Part B drugs.

GLP-1 receptor agonists (GLP-1s) such as semaglutide, and dual agonists like tirzepatide, are transforming obesity treatment and reshaping the US health care landscape.

The PBM Policy and Legislative Update — Spring 2025 edition builds upon prior issues and summarizes activity from January through March (2025) that affects the PBM industry. It highlights federal activities, state activities, and other noteworthy events and trends affecting the PBM industry.