X0303 4 2010-09-20 0 0000740761 BUCYRUS INTERNATIONAL INC BUCY 0001297859 Mackus Craig R PO BOX 500 1100 MILWAUKEE AVENUE SOUTH MILWAUKEE WI 53172 0 1 0 0 CFO and Secretary Common Stock 2010-09-20 4 S 0 10050 71 D 26486 D Common Stock 11828 D Common Stock 4000 D Common Stock 2700 D Common Stock 13800 D Common Stock 3700 D Stock Appreciation Rights 59.48 2020-02-23 Common Stock 13900 13900 D Stock Appreciation Rights 13.52 2019-02-24 Common Stock 56000 56000 D Stock Appreciation Rights 51.69 2018-02-20 Common Stock 12900 12900 D Stock Appreciation Rights 28.52 2017-02-21 Common Stock 18400 18400 D Stock Appreciation Rights 19.882 2016-02-16 Common Stock 80400 80400 D The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on July 28, 2010. Grant to reporting person of "base" restricted stock under the Omnibus Incentive Plan 2007. The "base" restricted stock vested on December 31, 2009. Grant to reporting person of "premium" restricted stock under the Omnibus Incentive Plan 2007. The "premium" restricted stock fully vested on December 31, 2009. Grant to reporting person of restricted stock under the Omnibus Incentive Plan 2007. The restricted stock vests on December 2010. Grant to reporting person of restricted stock under the Omnibus Incentive Plan 2007. The restricted stock vests on December 2011. Grant to reporting person of restricted stock under the Omnibus Incentive Plan 2007. The restricted stock vests on December 2012. Grant to reporting person of restricted stock under the Omnibus Incentive Plan 2007. The restricted stock vests on December 2013. The stock appreciation rights are granted under the Omnibus Incentive Plan 2007 and will incrementally vest 10%, 15%, 25% and 50%, respectively, on December 31, 2010, 2011, 2012 and 2013. The stock appreciation rights are granted under the Omnibus Incentive Plan 2007 and will incrementally vest 10%, 15%, 25% and 50%, respectively, on December 31, 2009, 2010, 2011 and 2012. The stock appreciation rights are granted under the Omnibus Incentive Plan 2007 and will incrementally vest 10%, 15%, 25% and 50%, respectively, on December 31, 2008, 2009, 2010 and 2011. The stock appreciation rights are granted under the Omnibus Incentive Plan 2007 and will incrementally vest 10%, 15%, 25% and 50%, respectively, on December 31, 2007, 2008, 2009 and 2010. The stock appreciation rights are granted under the Omnibus Incentive Plan 2007 and will incrementally vest 10%, 15%, 25% and 50%, respectively, on December 31, 2006, 2007, 2008 and 2009. /s/Craig R. Mackus 2010-09-21