X0306 4 2019-05-03 0 0001133421 NORTHROP GRUMMAN CORP /DE/ NOC 0001216503 BUSH WESLEY G 2980 FAIRVIEW PARK DRIVE FALLS CHURCH VA 22042 1 1 0 0 Chairman Common Stock 2019-05-03 4 S 0 3725 290.70 D 46275 D Common Stock 2019-05-03 4 S 0 5798 292.06 D 40477 D Common Stock 2019-05-03 4 S 0 40477 291.60 D 0 D Common Stock 20035.65 I Held in Bush Trust No. 4 Common Stock 5660.7189 I Held in Northrop Grumman Savings & Investment Plan Common Stock 19089.25 I Held in Wesley G. Bush Rev. Trust Common Stock 207161 I Held in WG&NF Bush Family Trust The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person. Represents the weighted average sale price of $290.70 rounded to the nearest hundredth. The highest price at which the shares were sold was $290.99 and the lowest price at which the shares were sold was $290.39. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote in this Form 4. Represents the weighted average sale price of $292.06 rounded to the nearest hundredth. The highest price at which the shares were sold was $292.19 and the lowest price at which the shares were sold was $292.00. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote in this Form 4. Represents the weighted average sale price of $291.60 rounded to the nearest hundredth. The highest price at which the shares were sold was $291.995 and the lowest price at which the shares were sold was $291.00. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote in this Form 4. Held in the Northrop Grumman Savings and Investment Plan (the "Plan"), a qualified profit sharing plan, as of May 3, 2019. Share totals with respect to the Plan are based upon unit accounting and therefore may reflect a change in units attributable to an individual though no acquisition or disposition occurred. /s/ Jennifer C. McGarey, Attorney-in-Fact 2019-05-07