Company: NOC
Filing Date: 2025-06-10
Form Type: 11-K
Source: 0001133421-25-000044
Chunk: 0

Company: NORTHROP GRUMMAN CORP /DE/
Filing Date: 2025-06-10
Form: 11-K
Chunk 0
---
#### ______________________________________________

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549
#### ____________________

#### FORM 11-K
#### ____________________

(Mark One)

| þ |     | ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 |

#### For the fiscal year ended December 31, 2024

#### OR
| ¨ |     | TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 |

<div align='center'>For the transition period from to .</div>

#### Commission file number: 1-16411
| A. |     | Full title of the plan and address of the plan, if different from that of the issuer named below: |

### NORTHROP GRUMMAN FINANCIAL

### SECURITY AND SAVINGS PROGRAM
| B. |     | Name of issuer of the securities held pursuant to the plan and the address of its principal executive office: |

### NORTHROP GRUMMAN CORPORATION

#### 2980 Fairview Park Drive

#### Falls Church, Virginia 22042
#### ________________________________________________

### Northrop Grumman Financial

#### Security and Savings Program
Financial Statements as of December 31, 2024 and 2023,

and for the Year Ended December 31, 2024,

Supplemental Schedule as of December 31, 2024,

and Report of Independent Registered Public Accounting Firm

NORTHROP GRUMMAN FINANCIAL SECURITY AND SAVINGS PROGRAM

| TABLE OF CONTENTS                                                                                         |     |    |     |      |
|                                                                                                           |     |    |     | Page |
| REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM                                                   |     |  1 |     |      |
| FINANCIAL STATEMENTS                                                                                      |     |    |     |      |
| Statements of Net Assets Available for Benefits as of December 31, 2024 and 2023                          |     |  2 |     |      |
| Statement of Changes in Net Assets Available for Benefits for the Year Ended December 31, 2024            |     |  3 |     |      |
| Notes to Financial Statements                                                                             |     |  4 |     |      |
| SUPPLEMENTAL SCHEDULE                                                                                     |     |    |     |      |
| Form 5500, Schedule H, Part IV,