X0306 4/A 2016-08-11 2016-08-15 0001486957 BWX Technologies, Inc. BWXT 0001681053 Loving Richard W 800 MAIN STREET 4TH FLOOR LYNCHBURG VA 24504 0 1 0 0 SVP, Human Resources Restricted Stock Unit 0 2016-08-11 4 A 0 1857 0 A 2019-08-11 Common Stock 1857 1857 D This line item is not new or revised, but is being reported again solely to gain access to the electronic filing system for filing an amendment. The purpose of this amendment is to delete the erroneous reporting of performance restricted stock units on the Form 4 filed on August 15, 2016 before the satisfaction of the underlying performance criteria. Grant of restricted stock units pursuant to the Amended and Restated 2010 Long-Term Incentive Plan of BWX Technologies, Inc. Each restricted stock unit represents a contingent right to receive one share of BWXT common stock. RSUs vest in three equal annual installments beginning August 11, 2017. Richard W. Loving, by Suzanne Warfield, attorney-in-fact 2016-08-15