X0508 4 2026-02-02 0 0001133421 NORTHROP GRUMMAN CORP /DE/ NOC 0001692554 WELSH MARK A III 2980 FAIRVIEW PARK DRIVE FALLS CHURCH VA 22042 1 0 0 0 1 Common Stock 2026-02-02 4 S 0 2 676.14 D 4296 D Common Stock 2026-02-02 4 S 0 2 677.43 D 4294 D Common Stock 2026-02-02 4 S 0 4 680.49 D 4290 D Common Stock 2026-02-02 4 S 0 8 681.68 D 4282 D Common Stock 2026-02-02 4 S 0 22 682.47 D 4260 D Common Stock 2026-02-02 4 S 0 6 683.79 D 4254 D Common Stock 2026-02-02 4 S 0 7 684.67 D 4247 D Common Stock 2026-02-02 4 S 0 10 685.33 D 4237 D Common Stock 2026-02-02 4 S 0 11 686.43 D 4226 D Common Stock 2026-02-02 4 S 0 8 687.64 D 4218 D Common Stock 2026-02-02 4 S 0 10 688.51 D 4208 D Common Stock 2026-02-02 4 S 0 5 689.31 D 4203 D The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 23, 2025. Represents the weighted average sale price of $676.14 rounded to the nearest hundredth. The highest price at which the shares were sold was $676.17 and the lowest price at which the shares were sold was $676.11. 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 $677.43 rounded to the nearest hundredth. The highest price at which the shares were sold was $677.84 and the lowest price at which the shares were sold was $677.02. 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 $680.49 rounded to the nearest hundredth. The highest price at which the shares were sold was $680.94 and the lowest price at which the shares were sold was $680.33. 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 $681.68 rounded to the nearest hundredth. The highest price at which the shares were sold was $681.91 and the lowest price at which the shares were sold was $681.45. 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 $682.47 rounded to the nearest hundredth. The highest price at which the shares were sold was $682.98 and the lowest price at which the shares were sold was $682.04. 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 $683.79 rounded to the nearest hundredth. The highest price at which the shares were sold was $683.98 and the lowest price at which the shares were sold was $683.62. 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 $684.67 rounded to the nearest hundredth. The highest price at which the shares were sold was $684.92 and the lowest price at which the shares were sold was $684.14. 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 $685.33 rounded to the nearest hundredth. The highest price at which the shares were sold was $685.76 and the lowest price at which the shares were sold was $685.00. 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 $686.43 rounded to the nearest hundredth. The highest price at which the shares were sold was $686.83 and the lowest price at which the shares were sold was $686.10. 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 $687.64 rounded to the nearest hundredth. The highest price at which the shares were sold was $687.96 and the lowest price at which the shares were sold was $687.04. 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 $688.51 rounded to the nearest hundredth. The highest price at which the shares were sold was $688.88 and the lowest price at which the shares were sold was $688.08. 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 $689.31 rounded to the nearest hundredth. The highest price at which the shares were sold was $689.72 and the lowest price at which the shares were sold was $689.01. 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. /s/ Jennifer C. McGarey, Attorney-in-Fact 2026-02-03