X0304 4 2011-07-30 0001486957 Babcock & Wilcox Co BWC 0001329526 Taff Michael S 13024 BALLANTYNE CORPORATE PLACE SUITE 700 CHARLOTTE NC 28277 0 1 0 0 SVP and CFO Common Stock 2011-07-30 4 F 0 9317 24.98 D 66019 D Common Stock 2011-07-30 4 M 0 8229 0 A 74248 D Common Stock 2011-07-30 4 F 0 3100 24.98 D 71148 D Common Stock 2011-07-30 4 M 0 17245 0 A 88393 D Common Stock 2011-07-30 4 F 0 6215 24.98 D 82178 D Common Stock 2011-07-30 4 M 0 9932 0 A 92110 D Common Stock 2011-07-30 4 F 0 3552 24.98 D 88558 D Common Stock 989 I 401k Plan Common Stock 0 2011-07-30 4 M 0 8229 0 D 2013-03-04 Common Stock 8229 0 D Common Stock 0 2011-07-30 4 M 0 17245 0 D 2012-03-05 Common Stock 17245 0 D Common Stock 0 2011-07-30 4 M 0 9932 0 D 2012-03-05 Common Stock 9932 0 D Based on number of units held in the BWC Thrift Plan and the fair market value of BWC common stock as of April 1, 2011. Each restricted stock unit represents a contingent right to receive one share of BWC common stock. Vesting accelerated pursuant to the Restructuring Transaction Retention Agreement. Angela P. Winter, attorney-in-fact 2011-08-02