As filed with the Securities and Exchange Commission on April 23, 2025

Registration No. 333-284021

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

POST-EFFECTIVE AMENDMENT NO. 1

TO

FORM S-1

REGISTRATION STATEMENT

Under

The Securities Act of 1933

Abpro Holdings, Inc.

(Exact name of Registrant as specified in its charter)

Delaware	2834	87-1013956
(State or other jurisdiction of incorporation or organization)	(Primary Standard Industrial Classification Code Number)	(I.R.S. Employer Identification No.)

68 Cummings Park Drive

Woburn, Massachusetts 01801

1-800 -396-5890

(Address, including zip code, and telephone number, including area code, of registrant’s principal executive offices)

Miles Suk

Chief Executive Officer

Abpro Holdings, Inc.

68 Cummings Park Drive

Woburn, Massachusetts 01801

1-800 -396-5890

(Name, address, including zip code, and telephone number, including area code, of agent for service)

Copies to:

Jonathan H. Talcott

E. Peter Strand

Michael K. Bradshaw, Jr.

Nelson Mullins Riley & Scarborough LLP

101 Constitution Avenue, NW, Suite 900

Washington, D.C. 20001

(202) 689-2800

Approximate date of commencement of proposed sale to the public: From time to time after this Registration Statement becomes effective.

If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933 check the following box: ☒

If this form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.  ☐

If this form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.  ☐

If this form is a post-effective amendment filed pursuant to Rule 462(d) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.  ☒ (333-284021)

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer	☐	Accelerated filer	☐
Non-accelerated filer	☒	Smaller reporting company	☒
		Emerging growth company	☒

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act.  ☐

This Post-Effective Amendment No. 1 to the Registration Statement shall become effective upon filing with the Securities and Exchange Commission in accordance with Rule 462(d) under the Securities Act of 1933, as amended.

EXPLANATORY NOTE

This Post-Effective Amendment No. 1 (this “Amendment”) to the Registration Statement on Form S-1 of Abpro Holdings, Inc. (File No. 333-284021), initially filed on December 23, 2024, and declared effective by the SEC on February 12, 2025 (the “Registration Statement”), is being filed as an exhibit-only filing solely to file a consent of Wolf & Company, P.C. with respect to its report dated April 15, 2025, related to the financial statements of Abpro Holdings, Inc. contained in the Annual Report on Form 10-K of Abpro Holdings, Inc. for the year ended December 31, 2024 and included in the Prospectus Supplement No. 1 dated April 23, 2025 filed pursuant to Rule 424(b)(3), filed herewith as Exhibit 23.1 (the “Consent”). Accordingly, this Amendment consists only of the facing page, this explanatory note, Item 16 of Part II of the Registration Statement, the signature pages to the Registration Statement, and the Consent. The prospectus and the balance of Part II of the Registration Statement are unchanged hereby and have been omitted.

PART II — INFORMATION NOT REQUIRED IN PROSPECTUS

Item 16. Exhibits and Financial Statement Schedules.

Exhibit Number	Description
23.1*	Consent of Wolf & Company, P.C.

* Filed herewith.

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SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, as amended, the registrant has duly caused this Post-Effective Amendment No. 1 to the Registration Statement on Form S-1 to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Woburn, Massachusetts, on the 23rd day of April 2025.

ABPRO HOLDINGS, INC.
By:	/s/ Miles Suk
	Miles Suk
	Chief Executive Officer and Chairman of the Board

POWER OF ATTORNEY

Each person whose signature appears below hereby constitutes and appoints Miles Suk, the individual’s true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for the person and in his or her name, place and stead, in any and all capacities, to sign this Registration Statement and any or all amendments, including post-effective amendments to the Registration Statement, including a prospectus or an amended prospectus therein and any Registration Statement for the same offering that is to be effective upon filing pursuant to Rule 462 under the Securities Act, and all other documents in connection therewith to be filed with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact as agents or any of them, or their substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Act of 1933, as amended, this Post-Effective Amendment No. 1 to the Registration Statement on Form S-1 has been signed below by the following persons in the capacities and on the dates indicated.

Name	Position	Date
/s/ Miles Suk	Chief Executive Officer and Chairman of the Board	April 23, 2025
Miles Suk	(Principal Executive Officer, Principal Financial and Accounting Officer)
/s/ Anthony D. Eisenberg	Director	April 23, 2025
Anthony D. Eisenberg
/s/ Soo Young Lee	Director	April 23, 2025
Soo Young Lee
/s/ Ian McDonald	Director	April 23, 2025
Ian McDonald

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