X0306 4/A 2018-02-13 2018-02-15 0 0001374535 Altra Industrial Motion Corp. AIMC 0001383278 Schuele Craig C/O ALTRA INDUSTRIAL MOTION CORP. 300 GRANITE STREET SUITE 201 BRAINTREE MA 02184 0 1 0 0 VP Marketing and Business Dev Common Stock, par value $0.001 2018-02-13 4 A 0 2652 45.80 A 70538 D Common Stock, par value $0.001 2018-02-13 4 A 0 3133 45.80 A 73671 D Common Stock, par value $0.001 2018-02-13 4 F 0 1330 45.80 D 72341 D Common Stock, par value $0.001 2018-02-15 4 F 0 897 46.05 D 71444 D These shares are 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. Shares of Restricted Common Stock are subject to restrictions. The restrictions will expire in equal installments on August 15, 2018, 2019, 2020 and 2021, respectively. Performance shares earned after Compensation Committee determined that certain performance goals which measure the Company's total shareholder return ("TSR") against the TSR of a peer group of companies over the three year measurement period, from January 1, 2015 to December 31, 2017, had been met. The shares are issued as common stock par value $0.001 ("Common Stock") awarded to the Reporting Person under the Altra Industrial Motion Corp. 2014 Omnibus Incentive Plan. Dividends accrued on earned performance shares were included as additional shares of Common Stock in accordance with the terms of the award agreement. Shares forfeited in lieu of taxes upon award of Common Stock Shares forfeited in lieu of taxes upon vesting of Restricted Stock This Form 4/A is being filed to correct the date in Box 3 to reflect the date of February 13, 2018. The transactions reported in the original filing were correct, but the date of the earliest transaction reported needed to be amended to reflect February 13, 2018. Todd Patriacca, Attorney-in-fact 2018-02-15