AIMC Altra Industrial Motion Corporation

300 Granite Street, Suite 201

Braintree, Massachusetts 02184

(Address of Principal Executive Offices and Zip Code)

Altra Industrial Motion Corp. 2014 Omnibus Incentive Plan

(Full title of the plan)

Thomas E. Valentyn

Secretary

Altra Industrial Motion Corp.

200 State Street

Beloit, Wisconsin 53511-6254

(608) 364-8800

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

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a 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.

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. ☐

DEREGISTRATION OF SECURITIES

Altra Industrial Motion Corp., a Delaware corporation (the “Company”), is filing with the United States Securities and Exchange Commission (the “SEC”) these Post-Effective Amendments (these “Post-Effective Amendments”) to deregister all shares of the Company’s common stock, par value $0.001 per share (the “Common Stock”) originally registered by the Company pursuant to the Registration Statements on Form S-8 (each a “Registration Statement,” and collectively, the “Registration Statements”) listed below, which have not been sold or otherwise issued as of the date of filing of these Post-Effective Amendments:

On March 27, 2023, the Company completed its previously disclosed merger with a subsidiary of Regal Rexnord Corporation, a Wisconsin corporation (“Parent”), that was contemplated by that certain Agreement and Plan of Merger (the “Merger Agreement”), dated as of October 26, 2022, by and among the Company, Parent, and Aspen Sub, Inc., a Delaware corporation and a wholly owned subsidiary of Parent (“Merger Sub”). Pursuant to the Merger Agreement, Merger Sub merged with and into the Company (the “Merger”), with the Company surviving the Merger as a wholly owned subsidiary of Parent. As a result of the Merger, each outstanding share of Common Stock was automatically converted into the right to receive the merger consideration described in the Merger Agreement. In connection with the Merger, the Company is terminating all offerings of its securities pursuant to the Registration Statements.