SpringWorks Gets CHMP Nod for Mirdametinib in Rare Disease

Core Viewpoint - SpringWorks Therapeutics has received a positive opinion from the European Medicines Agency's Committee for Medicinal Products for Human Use for its MEK inhibitor, mirdametinib, aimed at treating a rare genetic disorder [1][2]. Company Developments - The CHMP has recommended conditional marketing authorization for mirdametinib to treat symptomatic, inoperable plexiform neurofibromas in patients aged two years and older with neurofibromatosis type 1 [2]. - If approved, mirdametinib will be the first therapy authorized for treating NF1-PN in the European Union [3]. - The FDA approved mirdametinib under the brand name Gomekli in February 2025, generating sales of $4.9 million in the U.S. during Q1 2025 [3]. Financial Performance - Year-to-date, SpringWorks shares have increased by 28.6%, contrasting with a 5.5% decline in the industry [5]. - Merck KGaA announced plans to acquire SpringWorks for $47 per share, totaling approximately $3.9 billion, with the transaction expected to close in the second half of 2025 [6]. Product Pipeline - Ogsiveo, an oral gamma-secretase inhibitor, was approved in the U.S. for treating desmoid tumors in November 2023 and generated $172 million in sales in 2024, with $44.1 million in Q1 2025 [7][8]. - Ongoing label expansion studies for Ogsiveo are targeting various cancer indications, with the EMA's opinion on its MAA expected in Q2 2025 [8]. Market Position - The acquisition by Merck KGaA is anticipated to enhance SpringWorks' ability to reach global markets and support patients with rare tumors [9].