The present disclosure provides anti mucin 16 antibodies : bispecific antibodies (bsAbs) that bind to both MUC16 and CD3 and activate T cells via the CD3 complex in the presence of MUC16-expressing tumors. human IgG antibodies that bind to human andMUC16 (monospecific antibodies).anti-MUC16 antibody drug conjugates which inhibit tumor growth in vivo The antibodies are useful for the treatment of various cancers, including ovarian cancer.