The present disclosure relates to reversal agents, which specifically bind to anti-Factor XI and/or anti-Factor XIa antibodies, and reverse one or more anticoagulant effects of the anti- Factor XI and/or anti-Factor XIa antibodies, as well as to methods of use thereof, such as methods for reversing anticoagulant effects of such anti-Factor XI and/or anti-Factor XIa antibodies, and to related methods for managing bleeding or bleeding risks.