Aktis Oncology, a clinical-stage biotechnology company pioneering the discovery and development of novel targeted alpha radiopharmaceuticals to treat a broad range of solid tumors, announced the successful closing of an oversubscribed and upsized $175 million Series B financing. The financing was led by RA Capital Management, and co-led by RTW Investments and Janus Henderson Investors. A select syndicate of additional new investors joined the financing, including funds and accounts advised by T. Rowe Price Associates, Inc., Avidity Partners, and an undisclosed life sciences-focused investment fund. All existing institutional investors participated, as well as existing strategic investors Bristol Myers Squibb, Eli Lilly and Company, and MRL Ventures Fund, the therapeutics-focused corporate venture fund of Merck & Co., Inc.