MLTX Stock Gains 18% as Merck Reportedly Eyes Buyout

Core Insights - Shares of MoonLake Immunotherapeutics (MLTX) increased by 18% following reports of Merck's interest in acquiring the company [1][8] - Merck had previously made a non-binding offer for MoonLake valued at over $3 billion, which was rejected, but discussions may resume [2][8] - MoonLake is focused on developing sonelokimab, a novel nanobody therapy for inflammatory diseases, with key data expected in September 2025 [3][4] Company Overview - MoonLake Immunotherapeutics is a clinical-stage biotech company based in Switzerland, developing sonelokimab for conditions such as hidradenitis suppurativa and psoriatic arthritis [3] - The company is also exploring sonelokimab for additional dermatological and rheumatological indications [4] Market Context - Merck's interest in MoonLake is part of a strategy to diversify its revenue sources, which are heavily reliant on Keytruda, accounting for nearly 46% of its total revenues in 2024 [7] - Concerns over Keytruda's potential loss of exclusivity after 2028 have prompted Merck to seek new drug candidates [7][8] - Recent M&A activity in the pharmaceutical sector indicates a trend towards acquiring small biotechs with promising assets, aligning with Merck's rumored pursuit of MoonLake [13] Recent Transactions - Sanofi announced a $9.5 billion acquisition of Blueprint Medicines to enhance its immunology pipeline [11] - Bristol Myers Squibb entered a co-development agreement with BioNTech for an investigational bispecific antibody, reflecting ongoing interest in oncology candidates [12]