    <SEC-DOCUMENT>0001213900-25-096542-index.html : 20251006
    <SEC-HEADER>0001213900-25-096542.hdr.sgml : 20251006
    <ACCEPTANCE-DATETIME>20251006161501
    ACCESSION NUMBER:		0001213900-25-096542
    CONFORMED SUBMISSION TYPE:	DEFA14A
    PUBLIC DOCUMENT COUNT:		4
    FILED AS OF DATE:		20251006
    DATE AS OF CHANGE:		20251006

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			Abpro Holdings, Inc.
    		CENTRAL INDEX KEY:			0001893219
    		STANDARD INDUSTRIAL CLASSIFICATION:	BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
    		ORGANIZATION NAME:           	03 Life Sciences
    		EIN:				871013956
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		DEFA14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-41224
    		FILM NUMBER:		251377007

    	BUSINESS ADDRESS:
    		STREET 1:		6 ST JOHNS LANE, FLOOR 5
    		CITY:			NEW YORK
    		STATE:			NY
    		ZIP:			10013
    		BUSINESS PHONE:		248-890-7200

    	MAIL ADDRESS:
    		STREET 1:		6 ST JOHNS LANE, FLOOR 5
    		CITY:			NEW YORK
    		STATE:			NY
    		ZIP:			10013

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	Atlantic Coastal Acquisition Corp. II
    		DATE OF NAME CHANGE:	20211110
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>DEFA14A
    <SEQUENCE>1
    <FILENAME>ea0260339-defa14a_abpro.htm
    <DESCRIPTION>DEFINITIVE ADDITIONAL MATERIALS
    <TEXT>
    Document 1 - file: ea0260339-defa14a_abpro.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>image_001.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 2 - file: image_001.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>image_002.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 3 - file: image_002.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>image_003.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 4 - file: image_003.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>