X0508 4/A 2024-11-13 2024-11-15 0 0001893219 Abpro Holdings, Inc. ABP 0002044498 Suk Jin Wook (Miles) C/O ABPRO HOLDINGS, INC. 68 CUMMINGS PARK DRIVE WOBURN MA 01801 1 1 0 0 Co-CEO & Chairman 0 Stock option (right to buy) 1.63 2024-11-13 4 A 0 613500 0 A 2032-02-18 Common Stock, par value $0.0001 per share 613500 613500 I By Biocelsus International Co. Ltd. On November 15, 2024, the reporting person filed a Form 4 which inadvertently omitted the transaction disclosed hereby. Reflects the issuance by Abpro Holdings, Inc. (f/k/a Atlantic Coastal Acquisition Corp. II) (the "Issuer") on November 13, 2024, of rollover stock option awards in connection with the business combination between the Issuer and Abpro Corporation, a Delaware corporation ("Abpro"), pursuant to a Business Combination Agreement, dated as of December 11, 2023 (as amended by Amendment No. 1 to Business Combination Agreement, dated September 4, 2024, the "Business Combination Agreement"), by and among the Issuer, Abpro Merger Sub Corp, a Delaware corporation, and Abpro. This stock option award is 100% vested. Biocelsus International Co. Ltd. is controlled by the reporting person. The reporting person disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein. /s/ Nelson Mullins Riley & Scarborough LLP, Attorney-in-Fact 2024-11-25