X0306 4 2022-12-16 0 0001929589 MariaDB plc MRDB 0001694061 Wang Theodore T 590 MADISON AVENUE, 21ST FLOOR NEW YORK NY 10022 1 0 0 0 Ordinary Shares 2022-12-16 4 A 0 2428935 A 2428935 D On December 16, 2022, MariaDB plc, an Irish public limited company (formerly named Mangomill plc, the "Issuer") announced the completion of the business combination between Angel Pond Holdings Corporation, a Cayman Islands exempted company ("APHC") and MariaDB Corporation Ab, a Finnish private limited liability company ("MariaDB") with and into the Issuer, with Issuer continuing as the surviving corporation (the "Business Combination"), pursuant to a business combination agreement, dated as of January 31, 2022, by and among the Issuer, APHC, MariaDB, and Meridian MergerSub Inc., a Cayman Islands exempted company and wholly owned subsidiary of the Issuer (the "Merger Agreement"). In connection with the Business Combination, each share of Class B common stock, par value $0.0001 per share, of APHC owned by the reporting person was cancelled and converted into the right to receive one ordinary share, nominal value $0.01 per share, of the Issuer, subject to the terms and conditions of the Merger Agreement. /s/ Theodore Wang 2022-12-19