Company: NOC
Filing Date: 2025-04-04
Form Type: DEF 14A
Source: 0001133421-25-000016
Chunk: 2

Company: NORTHROP GRUMMAN CORP /DE/
Filing Date: 2025-04-04
Form: DEF 14A
Chunk 2
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 |     | Graham N. Robinson |
| Kimberly A. Ross     |     | Gary Roughead     |     | Thomas M. Schoewe  |
| James S. Turley      |     | Kathy J. Warden   |     | Mark A. Welsh III  |
| Mary A. Winston      |     |                   |     |                    |

#### 2Northrop Grumman

#### Notice of 2025 Annual Meeting of Shareholders

#### Voting Items
| Proposals |     |                                                                                           |     | Board VoteRecommendations |     | For FurtherDetails |
| 1.        |     | Election of Directors                                                                     |     | “FOR”eachDirector Nominee |     | Page15             |
| 2.        |     | Advisory Vote on Compensation of Named Executive Officers                                 |     | “FOR”                     |     | Page47             |
| 3.        |     | Ratification of Appointment of Independent Auditor                                        |     | “FOR”                     |     | Page89             |
| 4.        |     | Shareholder Proposal to Support Improved Clawback Policy regarding Unearned Executive Pay |     | “AGAINST”                 |     | Page92             |

Shareholders will also act on any other business as may properly come before the Annual Meeting or any adjournment or postponement thereof by or at the direction of the Board of Directors. The Annual Meeting will be conducted exclusively online through a live webcast in order to facilitate shareholder attendance and participation. You can find detailed instructions on how to attend on page 98of this Proxy Statement.

Your vote is important. Please promptly submit your vote by internet or telephone, or by signing, dating and returning a proxy card or voting instruction form in the postage-prepaid envelope provided so that your shares will be represented and voted at the meeting. A paper copy of the proxy materials may be obtained by logging on to www.proxyvote.com and following the instructions given.

By order of the Board of Directors,

Jennifer C. McGarey Corporate Vice President and Secretary

| How to Vote |     |                                                                                                                                                                                                                                                              |     |                                                                                                                         |     | Important Notice Regarding the Availability of Proxy Materials for the Shareholders Meeting to be held on May 21, 2025:                                        
 The Proxy Statement for the 2025 Annual Meeting of Shareholders and the Annual Report for the year ended December 31, 2024 are available at:www.proxyvote.com. |
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