Biotechnology Value Fund Group's Ownership in Xencor Inc

The filing discloses the ownership of Biotechnology Value Fund, L.P. and its affiliates in Xencor Inc. As of October 17, 2025, Biotechnology Value Fund, L.P. owns approximately 3.5% of Xencor's outstanding shares, while Biotechnology Value Fund II, L.P. owns about 2.5%. Biotechnology Value Trading Fund OS LP owns less than 1%. The general partners and related entities of these funds also have beneficial ownership of these shares. The filing includes a joint agreement among the reporting persons to file this Schedule 13G collectively. The filing is made under Rule 13d-1(c) of the Securities Exchange Act of 1934.