X0206 3 2022-05-19 0 0001907685 Comera Life Sciences Holdings, Inc. CMRA 0001927975 Wexler William A. 12 GILL STREET, SUITE 4650 WOBURN MA 01801 1 0 0 0 Common Stock 11062 D Warrants (right to buy) 11.50 2022-06-18 2027-05-19 Common Stock 50000 D The Reporting Person acquired these securities on May 19, 2022 in exchange for the Reporting Person's holdings in Comera Life Sciences, Inc. (the "Company") pursuant to the Business Combination Agreement, dated January 31, 2022, as amended, by and among OTR Acqusition Corp. (the "SPAC"), Comera Life Sciences Holdings, Inc. ("Holdco"), CLS Sub Merger 1 Corp., ("Company Merger Sub"), CLS Sub Merger 2 Corp. ("SPAC Merger Sub") and the Company (the "Agreement"). /s/ William A. Wexler 2022-05-20