Janus Henderson Group plc reports a small, passive holding in OmniAb, Inc.'s common stock, amounting to roughly 945,956 shares which the filing states represents 0.8% of the class. The disclosure shows the firm has shared voting and dispositive power over these shares (no sole voting or dispositive power reported), and the filing identifies indirect subsidiaries (JHIUS, JHIUKL and JHIAIFML) as registered investment advisers providing advice to managed portfolios. The filing includes a certification that the securities are held in the ordinary course of business and not for the purpose of changing or influencing control of the issuer. The filing also includes a power of attorney authorizing designated compliance officers to execute ownership reports on the company's behalf.