Lantheus Faces Investor Class Actions Over Pylarify Pricing and Competition Claims

Overview

• Multiple plaintiff firms, including Levi & Korsinsky, Kessler Topaz Meltzer & Check, and Johnson Fistel, have announced or filed securities class actions against Lantheus.
• The suits cover investors who bought Lantheus securities between February 26 and August 5, 2025.
• Complaints allege the company misled investors about Pylarify’s competitive position and pricing dynamics, including claims that an early 2025 price increase heightened competitive pressure and threatened revenue growth.
• A complaint describes May 7 and August 6, 2025 disclosures of Pylarify sales declines and reduced guidance, followed by stock drops of roughly 23% and 29%, respectively.
• Notices state that investors can share in any recovery without serving as lead plaintiff and may participate without out-of-pocket legal fees.