Joel W. Duling - May 9, 2021 Form 4 Insider Report for BWX Technologies, Inc. (BWXT)

Role: President, Nuclear Operations
Signature: /s/ Joel W. Duling by Theresa B. Taylor, attorney-in-fact
Stock symbol: BWXT
Transactions as of: May 9, 2021
Transactions value $: -$18,678
Form type: 4
Date filed: 5/11/2021, 05:03 PM

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	BWXT	Common Stock	Options Exercise	$0	+657	+3.14%	$0.00	21.6K	May 9, 2021	Direct
transaction	BWXT	Common Stock	Tax liability	-$18.7K	-283	-1.31%	$66.00	21.3K	May 9, 2021	Direct
holding	BWXT	Common Stock						425	May 9, 2021	401(k) Plan	F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	BWXT	Restricted Stock Units	Options Exercise	$0	-657	-100%	$0.00^*	0	May 9, 2021	Common Stock	657	$0.00	Direct	F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Based on number of units held in the BWXT Thrift Plan and the fair market value of BWXT common stock as of March 31, 2021.
F2	RSUs vested in three equal annual installments beginning May 9, 2019.