X0306 4/A 2013-03-07 2013-03-11 0 0001374535 Altra Holdings, Inc. AIMC 0001243011 HURT MICHAEL L 440 NORTH 5TH AVENUE CHAMBERSBURG PA 17201 1 1 0 0 Executive Chairman Common Stock, par value, $0.001 2013-03-07 2013-03-07 4 S 0 13218 26.47 D 59000 D This Form 4/A corrects a Form 4 (SEC Accession No. 0001209191-13-015631 ) filed in error that erroneously stated the amount of shares sold, the resulting remaining amount of securities beneficially owned, and the range of sales prices. The number of securities reported represents an aggregate number of shares sold in multiple open market transactions over a range of sales prices. The price reported represents the weighted average price. The Reporting Person undertakes to provide the staff of the SEC, the issuer, or a stockholder of the issuer, upon request, the number of shares sold at each separate price within the range. Sales prices range from $26.45 to $26.52 per share, inclusive. Todd Patriacca, Attorney-in-fact 2013-03-11