X0306 4 2017-02-08 0 0001374535 Altra Industrial Motion Corp. AIMC 0001383274 Christenson Carl R C/O ALTRA INDUSTRIAL MOTION CORP. 300 GRANITE STREET SUITE 201 BRAINTREE MA 02184 0 1 0 0 President and COO Common Stock, par value, $0.001 2017-02-08 4 A 0 26973 38.35 A 117191 D Common Stock, par value $0.001 301697 I By trust These shares are restricted common stock, par value $0.001 ("Restricted Common Stock"),par value $0.001, awarded to the Reporting Person under the Altra Industrial Motion Corp. 2014 Omnibus Incentive Plan. Shares of the Restricted Common Stock are subject to restrictions. The restrictions will expire in equal installments on August 15, 2017, 2018, 2019 and 2020, respectively. The shares are held in a trust for which Mr. Christenson serves as trustee. Todd Patriacca, Attorney-in-fact 2017-02-10