X0306 4 2018-02-23 0 0001374535 Altra Industrial Motion Corp. AIMC 0001383193 Ferris Gerald P C/O ALTRA INDUSTRIAL MOTION CORP. 300 GRANITE STREET SUITE 201 BRAINTREE MA 02184 0 1 0 0 V.P. Global Sales Common Stock, par value, $0.001 2018-02-23 4 A 0 1570 44.80 A 16235 D Common Stock, par value, $0.001 200 I By Children Common Stock, par value, $0.001 2796 I By Trust Performance shares earned after Compensation Committee determined that certain performance goals for the applicable measurement period (calendar year 2017) had been met. The shares are issued as restricted common stock par value $0.001 ("Restricted Common Stock") awarded to the Reporting Person under the Altra Industrial Motion Corp. 2014 Omnibus Incentive Plan, and are subject to forfeiture restrictions. The Restricted Common stock will be released from the forfeiture restrictions on February 15, 2020. Dividends accrued on earned performance shares were included as additional shares of Restricted Common Stock in accordance with the terms of the award agreement. These shares represent shares transferred to the Reporting Persons children from accounts under the Uniform Transfers to Minors Act. The Shares are held in a trust for which Mr. Ferris serves as the trustee. Todd Patriacca, Attorny-In-Fact 2018-02-27