X0303 4 2010-08-09 0001486957 Babcock & Wilcox Co BWC 0001492659 Nash Winfred D 13024 BALLANTYNE CORPORATE PLACE SUITE 700 CHARLOTTE NC 28277 0 1 0 0 President - NOG Common Stock 2010-08-09 5 A 0 958 0 A 14804 D Common Stock 2010-08-09 4 M 0 6835 0 A 21639 D Common Stock 2010-08-09 4 F 0 2884 23.76 D 18755 D Common Stock 2010-08-09 4 M 0 3243 0 A 21998 D Common Stock 2010-08-09 4 F 0 1368 23.76 D 20630 D Common Stock 393 I 401k Plan Stock Option (right to buy) 24.55 2010-08-02 5 A 0 13136 0 A 2017-03-04 Common Stock 13136 13136 D Stock Options (right to buy) 10.58 2010-08-02 5 A 0 24089 0 A 2016-03-05 Common Stock 24089 24089 D Restricted Stock Units 0 2010-08-09 5 A 0 8860 0 A 2013-03-04 Common Stock 8860 8860 D Restricted Stock Units 0 2010-08-09 5 A 0 8488 0 A 2012-03-05 Common Stock 8488 8488 D Restricted Stock Units 0 2010-08-09 5 A 0 10355 0 A 2011-03-03 Common Stock 10355 10355 D Restricted Stock Units 0 2010-08-09 5 A 0 9825 0 A 2012-03-05 Common Stock 9825 9825 D Restricted Stock Units 0 2010-08-09 4 M 0 6835 0 D 2011-03-03 Common Stock 6835 3520 D Restricted Stock Units 0 2010-08-09 4 M 0 3243 0 D 2012-03-05 Common Stock 3243 6582 D Grant of restricted stock received in connection with the pro-rata distribution of BWC common stock from McDermott International, Inc. ("MII") (the "Spin-off") and converted from MII restricted stock held by the Reporting Person as of the Spin-off. Includes shares of BWC common stock acquired in the spin-off. Based on number of units held in the BWC Thrift Plan and the fair market value of BWC common stock as of August 9, 2010. Grant of stock options received in connection with the Spin-off and converted from MII stock options held by the Reporting Person as of the Spin-off. Stock options vest in three equal annual installments beginning March 4, 2011. 1/3 of the stock options vested on March 5, 2010 and the remainder will vest in two equal annual installments beginning March 5, 2011. Grant of restricted stock units received in connection with the Spin-off and converted from MII restricted stock units held by the Reporting Person as of the Spin-off. RSUs represent the right to receive one share of BWC common stock for each unit that vests. RSUs vest in three equal annual installments beginning March 4, 2011. RSUs vest in two equal annual installments beginning March 5, 2011. Grant of restricted stock units received in connection with the Spin-off and converted from MII performance shares held by the Reporting Person as of the Spin-off. RSU represent the right to receive one share of BWC common stock for each unit that vests. 100% of the RSUs vest on March 3, 2011. 100% of the RSUs vest on March 5, 2012. In accordance with the terms of the award, a portion of the RSUs were subject to accelerated vesting. Angela P. Winter, attorney-in-fact 2010-08-11