NOC

SEC source: 0001628280-26-064142 · wk-form4_1790867081.xml · nonDerivative · entry 1

Brown Marianne Catherine · CIK 0001804183 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,706

F1 · shares: Represents shares of common stock deferred into a stock unit account pursuant to the Northrop Grumman 2024 Long-Term Incentive Stock Plan (the "Plan") in a transaction exempt pursuant to Rule 16b-3.

F2 · balance_after: Represents shares of common stock, including dividends, held in a stock unit account pursuant to the Plan. Dividends earned on shares held in the stock unit account were exempt from Section 16 and not reportable under rule 16a-11.

SEC source: 0001628280-26-064144 · wk-form4_1790867229.xml · nonDerivative · entry 1

KRISHNA ARVIND · CIK 0001629898 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,837

F1 · shares: Represents shares of common stock deferred into a stock unit account pursuant to the Northrop Grumman 2024 Long-Term Incentive Stock Plan (the "Plan") in a transaction exempt pursuant to Rule 16b-3.

F2 · balance_after: Represents shares of common stock, including dividends, held in a stock unit account pursuant to the Plan. Dividends earned on shares held in the stock unit account were exempt from Section 16 and not reportable under rule 16a-11.

SEC source: 0001628280-26-058482 · wk-form4_1787346622.xml · derivative · entry 1

Warden Kathy J · CIK 0001559112 · Director · Chair, CEO and President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 35,910

Underlying: Common Stock · 35,910 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Market Stock Unit ("MSU") represents the contingent right to receive, following vesting, between 0% and 150% of one share of the Issuer's common stock, subject to the Issuer's absolute stock price appreciation or depreciation over a performance period ending December 31, 2031. No portion of the MSUs will be earned if the Issuer's stock price depreciates by more than 25%, a 100% (or target) payout is earned if the Issuer's stock price appreciates by 10%, and a 150% payout is earned if the Issuer's stock price appreciates by 50% or more. The target number of MSUs is reported in this Report. Grant awarded pursuant to Rule 16b-3(d).

F1 · derivative.exercise_date: Each Market Stock Unit ("MSU") represents the contingent right to receive, following vesting, between 0% and 150% of one share of the Issuer's common stock, subject to the Issuer's absolute stock price appreciation or depreciation over a performance period ending December 31, 2031. No portion of the MSUs will be earned if the Issuer's stock price depreciates by more than 25%, a 100% (or target) payout is earned if the Issuer's stock price appreciates by 10%, and a 150% payout is earned if the Issuer's stock price appreciates by 50% or more. The target number of MSUs is reported in this Report. Grant awarded pursuant to Rule 16b-3(d).

F1 · derivative.expiration_date: Each Market Stock Unit ("MSU") represents the contingent right to receive, following vesting, between 0% and 150% of one share of the Issuer's common stock, subject to the Issuer's absolute stock price appreciation or depreciation over a performance period ending December 31, 2031. No portion of the MSUs will be earned if the Issuer's stock price depreciates by more than 25%, a 100% (or target) payout is earned if the Issuer's stock price appreciates by 10%, and a 150% payout is earned if the Issuer's stock price appreciates by 50% or more. The target number of MSUs is reported in this Report. Grant awarded pursuant to Rule 16b-3(d).

SEC source: 0001628280-26-052370 · wk-form4_1785865555.xml · nonDerivative · entry 10

WELSH MARK A III · CIK 0001692554 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 4,393

F1 · shares: 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.

F8 · price: Represents the weighted average sale price of $554.14 rounded to the nearest hundredth. The highest price at which the shares were sold was $554.17 and the lowest price at which the shares were sold was $554.11. 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.

SEC source: 0001628280-26-052370 · wk-form4_1785865555.xml · nonDerivative · entry 9

WELSH MARK A III · CIK 0001692554 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 4,397

F1 · shares: 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.

SEC source: 0001628280-26-052370 · wk-form4_1785865555.xml · nonDerivative · entry 8

WELSH MARK A III · CIK 0001692554 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 4,399

F1 · shares: 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.

SEC source: 0001628280-26-052370 · wk-form4_1785865555.xml · nonDerivative · entry 7

WELSH MARK A III · CIK 0001692554 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 4,401

F1 · shares: 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.

SEC source: 0001628280-26-052370 · wk-form4_1785865555.xml · nonDerivative · entry 6

WELSH MARK A III · CIK 0001692554 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 4,403

F1 · shares: 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.

F7 · price: Represents the weighted average sale price of $549.50 rounded to the nearest hundredth. The highest price at which the shares were sold was $549.74 and the lowest price at which the shares were sold was $549.03. 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.

SEC source: 0001628280-26-052370 · wk-form4_1785865555.xml · nonDerivative · entry 5

WELSH MARK A III · CIK 0001692554 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 4,409

F1 · shares: 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.

F6 · price: Represents the weighted average sale price of $548.32 rounded to the nearest hundredth. The highest price at which the shares were sold was $548.78 and the lowest price at which the shares were sold was $548.11. 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.

SEC source: 0001628280-26-052370 · wk-form4_1785865555.xml · nonDerivative · entry 4

WELSH MARK A III · CIK 0001692554 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 4,419

F1 · shares: 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.

F5 · price: Represents the weighted average sale price of $547.42 rounded to the nearest hundredth. The highest price at which the shares were sold was $547.94 and the lowest price at which the shares were sold was $547.12. 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.

SEC source: 0001628280-26-052370 · wk-form4_1785865555.xml · nonDerivative · entry 3

WELSH MARK A III · CIK 0001692554 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 4,450

F1 · shares: 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.

F4 · price: Represents the weighted average sale price of $546.42 rounded to the nearest hundredth. The highest price at which the shares were sold was $546.89 and the lowest price at which the shares were sold was $546.05. 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.

SEC source: 0001628280-26-052370 · wk-form4_1785865555.xml · nonDerivative · entry 2

WELSH MARK A III · CIK 0001692554 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 4,461

F1 · shares: 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.

F3 · price: Represents the weighted average sale price of $545.59 rounded to the nearest hundredth. The highest price at which the shares were sold was $545.82 and the lowest price at which the shares were sold was $545.12. 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.

SEC source: 0001628280-26-052370 · wk-form4_1785865555.xml · nonDerivative · entry 1

WELSH MARK A III · CIK 0001692554 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 4,480

F1 · shares: 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.

F2 · price: Represents the weighted average sale price of $544.53 rounded to the nearest hundredth. The highest price at which the shares were sold was $544.81 and the lowest price at which the shares were sold was $544.03. 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.

SEC source: 0001628280-26-046450 · wk-form4_1782931259.xml · nonDerivative · entry 1

Brown Marianne Catherine · CIK 0001804183 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,558

F1 · shares: Represents shares of common stock deferred into a stock unit account pursuant to the Northrop Grumman 2024 Long-Term Incentive Stock Plan (the "Plan") in a transaction exempt pursuant to Rule 16b-3.

F2 · balance_after: Represents shares of common stock, including dividends, held in a stock unit account pursuant to the Plan. Dividends earned on shares held in the stock unit account were exempt from Section 16 and not reportable under rule 16a-11.

SEC source: 0001628280-26-046449 · wk-form4_1782931234.xml · nonDerivative · entry 1

KRISHNA ARVIND · CIK 0001629898 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,749

F1 · shares: Represents shares of common stock deferred into a stock unit account pursuant to the Northrop Grumman 2024 Long-Term Incentive Stock Plan (the "Plan") in a transaction exempt pursuant to Rule 16b-3.

F2 · balance_after: Represents shares of common stock, including dividends, held in a stock unit account pursuant to the Plan. Dividends earned on shares held in the stock unit account were exempt from Section 16 and not reportable under rule 16a-11.

SEC source: 0001628280-26-037211 · wk-form4_1779391794.xml · nonDerivative · entry 2

WINSTON MARY A · CIK 0001282797 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,609

F1 · kind: Represents shares of common stock deferred into a stock unit account pursuant to the Northrop Grumman 2024 Long-Term Incentive Stock Plan (the "Plan") in a transaction exempt pursuant to Rule 16b-3.

F1 · shares: Represents shares of common stock deferred into a stock unit account pursuant to the Northrop Grumman 2024 Long-Term Incentive Stock Plan (the "Plan") in a transaction exempt pursuant to Rule 16b-3.

F2 · balance_after: Amount includes (i) 78 shares of common stock; and (ii) 1,540 shares of common stock, including dividends, held in a stock unit account pursuant to the Plan and the Northrop Grumman 2011 Long-Term Incentive Stock Plan. Dividends earned on shares held in the stock unit account were exempt from Section 16 and not reportable under Rule 16a-11.

SEC source: 0001628280-26-037209 · wk-form4_1779391739.xml · nonDerivative · entry 1

WELSH MARK A III · CIK 0001692554 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,470

F1 · kind: Represents shares of common stock deferred into a stock unit account pursuant to the Northrop Grumman 2024 Long-Term Incentive Stock Plan (the "Plan") in a transaction exempt pursuant to Rule 16b-3.

F1 · shares: Represents shares of common stock deferred into a stock unit account pursuant to the Northrop Grumman 2024 Long-Term Incentive Stock Plan (the "Plan") in a transaction exempt pursuant to Rule 16b-3.

F2 · balance_after: Amount includes (i) 488 shares of common stock; and (ii) 3,982 shares of common stock, including dividends, held in a stock unit account pursuant to the Plan and the Northrop Grumman 2011 Long-Term Incentive Stock Plan. Dividends earned on shares held in the stock unit account were exempt from Section 16 and not reportable under Rule 16a-11.

SEC source: 0001628280-26-037207 · wk-form4_1779391692.xml · nonDerivative · entry 1

Turley James S · CIK 0001580994 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,738

F1 · kind: Represents shares of common stock deferred into a stock unit account pursuant to the Northrop Grumman 2024 Long-Term Incentive Stock Plan (the "Plan") in a transaction exempt pursuant to Rule 16b-3.

F1 · shares: Represents shares of common stock deferred into a stock unit account pursuant to the Northrop Grumman 2024 Long-Term Incentive Stock Plan (the "Plan") in a transaction exempt pursuant to Rule 16b-3.

F2 · balance_after: Amount includes (i) 635 shares of common stock; and (ii) 6,103 shares of common stock, including dividends, held in a stock unit account pursuant to the Plan and the Northrop Grumman 2011 Long-Term Incentive Stock Plan. Dividends earned on shares held in the stock unit account were exempt from Section 16 and not reportable under Rule 16a-11.

SEC source: 0001628280-26-037205 · wk-form4_1779391640.xml · nonDerivative · entry 1

SCHOEWE THOMAS M · CIK 0001161375 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,737

F1 · kind: Represents shares of common stock deferred into a stock unit account pursuant to the Northrop Grumman 2024 Long-Term Incentive Stock Plan (the "Plan") in a transaction exempt pursuant to Rule 16b-3.

F1 · shares: Represents shares of common stock deferred into a stock unit account pursuant to the Northrop Grumman 2024 Long-Term Incentive Stock Plan (the "Plan") in a transaction exempt pursuant to Rule 16b-3.

F2 · balance_after: Amount includes (i) 3,160 shares of common stock; and (ii) 13,577 shares of common stock, including dividends, held in a stock unit account pursuant to the Plan and the Northrop Grumman 2011 Long-Term Incentive Stock Plan. Dividends earned on shares held in the stock unit account were exempt from Section 16 and not reportable under Rule 16a-11.

SEC source: 0001628280-26-037203 · wk-form4_1779391537.xml · nonDerivative · entry 1

ROUGHEAD GARY · CIK 0001543052 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,210

F1 · kind: Represents shares of common stock deferred into a stock unit account pursuant to the Northrop Grumman 2024 Long-Term Incentive Stock Plan (the "Plan") in a transaction exempt pursuant to Rule 16b-3.

F1 · shares: Represents shares of common stock deferred into a stock unit account pursuant to the Northrop Grumman 2024 Long-Term Incentive Stock Plan (the "Plan") in a transaction exempt pursuant to Rule 16b-3.

F2 · balance_after: Represents shares of common stock, including dividends, held in a stock unit account pursuant to the Plan and the Northrop Grumman 2011 Long-Term Incentive Stock Plan. Dividends earned on shares held in the stock unit account were exempt from Section 16 and not reportable under rule 16a-11.

SEC source: 0001628280-26-037201 · wk-form4_1779391495.xml · nonDerivative · entry 1

Ross Kimberly A. · CIK 0001536350 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,612

F1 · kind: Represents shares of common stock deferred into a stock unit account pursuant to the Northrop Grumman 2024 Long-Term Incentive Stock Plan (the "Plan") in a transaction exempt pursuant to Rule 16b-3.

F1 · shares: Represents shares of common stock deferred into a stock unit account pursuant to the Northrop Grumman 2024 Long-Term Incentive Stock Plan (the "Plan") in a transaction exempt pursuant to Rule 16b-3.

F2 · balance_after: Represents shares of common stock, including dividends, held in a stock unit account pursuant to the Plan and the Northrop Grumman 2011 Long-Term Incentive Stock Plan. Dividends earned on shares held in the stock unit account were exempt from Section 16 and not reportable under rule 16a-11.

SEC source: 0001628280-26-037199 · wk-form4_1779391441.xml · nonDerivative · entry 1

KRISHNA ARVIND · CIK 0001629898 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,666

F1 · kind: Represents shares of common stock deferred into a stock unit account pursuant to the Northrop Grumman 2024 Long-Term Incentive Stock Plan (the "Plan") in a transaction exempt pursuant to Rule 16b-3.

F1 · shares: Represents shares of common stock deferred into a stock unit account pursuant to the Northrop Grumman 2024 Long-Term Incentive Stock Plan (the "Plan") in a transaction exempt pursuant to Rule 16b-3.

F2 · balance_after: Represents shares of common stock, including dividends, held in a stock unit account pursuant to the Plan and the Northrop Grumman 2011 Long-Term Incentive Stock Plan. Dividends earned on shares held in the stock unit account were exempt from Section 16 and not reportable under rule 16a-11.

SEC source: 0001628280-26-037197 · wk-form4_1779391388.xml · nonDerivative · entry 1

Grady Christopher W. · CIK 0002112505 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 421

F1 · kind: Represents shares of common stock deferred into a stock unit account pursuant to the Northrop Grumman 2024 Long-Term Incentive Stock Plan (the "Plan") in a transaction exempt pursuant to Rule 16b-3.

F1 · shares: Represents shares of common stock deferred into a stock unit account pursuant to the Northrop Grumman 2024 Long-Term Incentive Stock Plan (the "Plan") in a transaction exempt pursuant to Rule 16b-3.

F2 · balance_after: Represents shares of common stock, including dividends, held in a stock unit account pursuant to the Plan and the Northrop Grumman 2024 Long-Term Incentive Stock Plan. Dividends earned on shares held in the stock unit account were exempt from Section 16 and not reportable under rule 16a-11.

SEC source: 0001628280-26-037195 · wk-form4_1779391337.xml · nonDerivative · entry 1

Brown Marianne Catherine · CIK 0001804183 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,415

F1 · kind: Represents shares of common stock deferred into a stock unit account pursuant to the Northrop Grumman 2024 Long-Term Incentive Stock Plan (the "Plan") in a transaction exempt pursuant to Rule 16b-3.

F1 · shares: Represents shares of common stock deferred into a stock unit account pursuant to the Northrop Grumman 2024 Long-Term Incentive Stock Plan (the "Plan") in a transaction exempt pursuant to Rule 16b-3.

F2 · balance_after: Represents shares of common stock, including dividends, held in a stock unit account pursuant to the Plan and the Northrop Grumman 2011 Long-Term Incentive Stock Plan. Dividends earned on shares held in the stock unit account were exempt from Section 16 and not reportable under rule 16a-11.

SEC source: 0001628280-26-037192 · wk-form4_1779391216.xml · nonDerivative · entry 1

ABNEY DAVID P · CIK 0001229820 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,824

F1 · kind: Represents shares of common stock deferred into a stock unit account pursuant to the Northrop Grumman 2024 Long-Term Incentive Stock Plan (the "Plan") in a transaction exempt pursuant to Rule 16b-3.

F1 · shares: Represents shares of common stock deferred into a stock unit account pursuant to the Northrop Grumman 2024 Long-Term Incentive Stock Plan (the "Plan") in a transaction exempt pursuant to Rule 16b-3.

F2 · balance_after: Amount includes (i) 2,475 shares of common stock; and (ii) 349 shares of common stock, including dividends, held in a stock unit account pursuant to the Plan. Dividends earned on shares held in the stock unit account were exempt from Section 16 and not reportable under Rule 16a-11.

SEC source: 0001628280-26-030668 · wk-form4_1778013600.xml · nonDerivative · entry 11

WELSH MARK A III · CIK 0001692554 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 4,121

F1 · shares: 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.

SEC source: 0001628280-26-030668 · wk-form4_1778013600.xml · nonDerivative · entry 10

WELSH MARK A III · CIK 0001692554 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 4,122

F1 · shares: 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.

F10 · price: Represents the weighted average sale price of $576.38 rounded to the nearest hundredth. The highest price at which the shares were sold was $576.87 and the lowest price at which the shares were sold was $576.03. 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.

SEC source: 0001628280-26-030668 · wk-form4_1778013600.xml · nonDerivative · entry 9

WELSH MARK A III · CIK 0001692554 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 4,129

F1 · shares: 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.

F9 · price: Represents the weighted average sale price of $575.59 rounded to the nearest hundredth. The highest price at which the shares were sold was $575.99 and the lowest price at which the shares were sold was $575.38. 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.

SEC source: 0001628280-26-030668 · wk-form4_1778013600.xml · nonDerivative · entry 8

WELSH MARK A III · CIK 0001692554 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 4,133

F1 · shares: 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.

F8 · price: Represents the weighted average sale price of $574.51 rounded to the nearest hundredth. The highest price at which the shares were sold was $574.66 and the lowest price at which the shares were sold was $574.35. 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.

SEC source: 0001628280-26-030668 · wk-form4_1778013600.xml · nonDerivative · entry 7

WELSH MARK A III · CIK 0001692554 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 4,135

F1 · shares: 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.

F7 · price: Represents the weighted average sale price of $573.51 rounded to the nearest hundredth. The highest price at which the shares were sold was $573.80 and the lowest price at which the shares were sold was $573.14. 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.

SEC source: 0001628280-26-030668 · wk-form4_1778013600.xml · nonDerivative · entry 6

WELSH MARK A III · CIK 0001692554 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 4,149

F1 · shares: 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.

F6 · price: Represents the weighted average sale price of $572.72 rounded to the nearest hundredth. The highest price at which the shares were sold was $572.98 and the lowest price at which the shares were sold was $572.51. 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.

SEC source: 0001628280-26-030668 · wk-form4_1778013600.xml · nonDerivative · entry 5

WELSH MARK A III · CIK 0001692554 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 4,155

F1 · shares: 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.

F5 · price: Represents the weighted average sale price of $571.74 rounded to the nearest hundredth. The highest price at which the shares were sold was $571.98 and the lowest price at which the shares were sold was $571.32. 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.

SEC source: 0001628280-26-030668 · wk-form4_1778013600.xml · nonDerivative · entry 4

WELSH MARK A III · CIK 0001692554 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 4,158

F1 · shares: 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.

F4 · price: Represents the weighted average sale price of $570.47 rounded to the nearest hundredth. The highest price at which the shares were sold was $570.84 and the lowest price at which the shares were sold was $570.25. 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.

SEC source: 0001628280-26-030668 · wk-form4_1778013600.xml · nonDerivative · entry 3

WELSH MARK A III · CIK 0001692554 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 4,201

F1 · shares: 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.

F3 · price: Represents the weighted average sale price of $569.49 rounded to the nearest hundredth. The highest price at which the shares were sold was $569.97 and the lowest price at which the shares were sold was $569.01. 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.

SEC source: 0001628280-26-030668 · wk-form4_1778013600.xml · nonDerivative · entry 2

WELSH MARK A III · CIK 0001692554 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 4,210

F1 · shares: 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.

F2 · price: Represents the weighted average sale price of $568.75 rounded to the nearest hundredth. The highest price at which the shares were sold was $568.92 and the lowest price at which the shares were sold was $568.49. 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.

SEC source: 0001628280-26-030668 · wk-form4_1778013600.xml · nonDerivative · entry 1

WELSH MARK A III · CIK 0001692554 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 4,215

F1 · shares: 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.

SEC source: 0001628280-26-022976 · wk-form4_1775141987.xml · nonDerivative · entry 1

Brown Marianne Catherine · CIK 0001804183 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,066

F1 · shares: Represents shares of common stock deferred into a stock unit account pursuant to the Northrop Grumman 2024 Long-Term Incentive Stock Plan (the "Plan") in a transaction exempt pursuant to Rule 16b-3.

F2 · balance_after: Represents shares of common stock, including dividends, held in a stock unit account pursuant to the Plan. Dividends earned on shares held in the stock unit account were exempt from Section 16 and not reportable under rule 16a-11.

SEC source: 0001628280-26-022974 · wk-form4_1775141941.xml · nonDerivative · entry 1

KRISHNA ARVIND · CIK 0001629898 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,317

F1 · shares: Represents shares of common stock deferred into a stock unit account pursuant to the Northrop Grumman 2024 Long-Term Incentive Stock Plan (the "Plan") in a transaction exempt pursuant to Rule 16b-3.

F2 · balance_after: Represents shares of common stock, including dividends, held in a stock unit account pursuant to the Plan. Dividends earned on shares held in the stock unit account were exempt from Section 16 and not reportable under rule 16a-11.

SEC source: 0001628280-26-013772 · wk-form4_1772571789.xml · nonDerivative · entry 1

Simpson Kathryn G · CIK 0001986485 · Corp VP & General Counsel

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1.39

F1 · shares: The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 28, 2025.

SEC source: 0001628280-26-013201 · wk-form4_1772485669.xml · nonDerivative · entry 1

ROEDER ROSHAN S · CIK 0001950117 · CVP & Pres. Mission Systems

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 2,353.39

F1 · shares: The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on October 30, 2025.

SEC source: 0001628280-26-010267 · wk-form4_1771624018.xml · nonDerivative · entry 1

ROEDER ROSHAN S · CIK 0001950117 · CVP & Pres. Mission Systems

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 4,107.39

F1 · shares: The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on October 30, 2025.

SEC source: 0001628280-26-010367 · wk-form4_1771635706.xml · nonDerivative · entry 1

Simpson Kathryn G · CIK 0001986485 · Corp VP & General Counsel

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 874.39

F1 · shares: The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 28, 2025.

SEC source: 0001628280-26-010262 · wk-form4_1771623755.xml · nonDerivative · entry 1

Hardesty Michael A · CIK 0001569355 · Corp VP, Controller & CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,525.29

SEC source: 0001628280-26-009800 · wk-form4_1771536607.xml · nonDerivative · entry 3

Davies Benjamin R. · CIK 0002026085 · CVP & Pres. Defense Systems

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 151

F1 · price: Represents the weighted average sale price of $719.61 rounded to the nearest hundredth. The highest price at which the shares were sold was $719.935 and the lowest price at which the shares were sold was $719.55. 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.

SEC source: 0001628280-26-009800 · wk-form4_1771536607.xml · derivative · entry 5

Davies Benjamin R. · CIK 0002026085 · CVP & Pres. Defense Systems

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,444

Underlying: Common Stock · 274 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: Each Restricted Stock Right ("RSR") represents a contingent right to receive an equivalent number of shares in Issuer common stock, or, at the election of the Issuer's Compensation Committee, cash or a combination of cash and Issuer common stock.

F3 · derivative.exercise_date: Each Restricted Stock Right ("RSR") represents a contingent right to receive an equivalent number of shares in Issuer common stock, or, at the election of the Issuer's Compensation Committee, cash or a combination of cash and Issuer common stock.

F4 · derivative.expiration_date: Shares issued upon vesting of RSRs granted under the 2011 Long-Term Incentive Stock Plan ("2011 LTISP") on 2/16/23 that vested on 2/17/26.

F5 · balance_after: Total amount includes (i) 641 RSRs granted under the 2011 LTISP on 11/1/23 that will vest on 11/2/26; (ii) 1,008 RSRs granted under the 2011 LTISP on 2/14/24 that will vest on 2/16/27; (iii) 638 RSRs granted under the 2011 LTISP on 7/31/24 that will vest on 8/2/27; (iv) 2,456 RSRs granted under the 2024 LTISP on 2/18/25 that will vest on 2/18/28; and (v) 1,701 RSRs granted under 2024 LTISP on 2/11/26 that will vest on 2/12/29.

SEC source: 0001628280-26-009800 · wk-form4_1771536607.xml · nonDerivative · entry 2

Davies Benjamin R. · CIK 0002026085 · CVP & Pres. Defense Systems

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,340.04

SEC source: 0001628280-26-009800 · wk-form4_1771536607.xml · nonDerivative · entry 1

Davies Benjamin R. · CIK 0002026085 · CVP & Pres. Defense Systems

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,463.04

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001628280-26-009796 · wk-form4_1771536525.xml · derivative · entry 3

Fleming Robert J. · CIK 0001995165 · CVP and Pres. Space Systems

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,513

Underlying: Common Stock · 264 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each Restricted Stock Right ("RSR") represents a contingent right to receive an equivalent number of shares in Issuer common stock, or, at the election of the Issuer's Compensation Committee, cash or a combination of cash and Issuer common stock.

F1 · derivative.exercise_date: Each Restricted Stock Right ("RSR") represents a contingent right to receive an equivalent number of shares in Issuer common stock, or, at the election of the Issuer's Compensation Committee, cash or a combination of cash and Issuer common stock.

F2 · derivative.expiration_date: Shares issued upon vesting of RSRs granted under the 2011 Long-Term Incentive Stock Plan ("2011 LTISP") on 2/16/23 that vested on 2/17/26.

F3 · balance_after: Total amount includes (i) 2,356 RSRs granted under the 2011 LTISP on 2/14/24 that will vest on 2/16/27; (ii) 2,456 RSRs granted under the 2024 LTISP on 2/18/25 that will vest on 2/18/28; and (iii) 1,701 RSRs granted under 2024 LTISP on 2/11/26 that will vest on 2/12/29.

SEC source: 0001628280-26-009796 · wk-form4_1771536525.xml · nonDerivative · entry 2

Fleming Robert J. · CIK 0001995165 · CVP and Pres. Space Systems

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,619.03

SEC source: 0001628280-26-009796 · wk-form4_1771536525.xml · nonDerivative · entry 1

Fleming Robert J. · CIK 0001995165 · CVP and Pres. Space Systems

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,704.03

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.