Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) For the quarterly period ended March 31, 2026 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from ________to ________ Commission File Number: 001-40367 BARINTHUS BIOTHERAPEUTICS PLC (Exact Name of Registrant as Specified in its Charter) England and Wales Not Applicable (State or other jurisdiction of incorporation or organizatio ...