Company: UIS
Filing Date: 2025-06-12
Form Type: 11-K
Source: 0001628280-25-030912
Chunk: 0

Company: UNISYS CORP
Filing Date: 2025-06-12
Form: 11-K
Chunk 0
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<div align='center'>UNITED STATES</div>

### SECURITIES AND EXCHANGE COMMISSION

#### WASHINGTON, DC 20549

#### FORM 11-K

### UNISYS CORPORATION
(Mark One):

| ý |     | 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 |

#### For the transition period from

#### to
#### .

#### Commission file number 1-8729
| A. |     | Full title of the plan and the address of the plan, if different from that of the issuer named below: |

### UNISYS CORPORATION SAVINGS PLAN
| B. |     | Name of issuer of the securities held pursuant to the plan and the address of its principal executive office: |

### UNISYS CORPORATION

#### 801 Lakeview Dr., Suite 100

#### Blue Bell, Pennsylvania 19422

#### UNISYS CORPORATION SAVINGS PLAN

#### TABLE OF CONTENTS
|                                                                                                     |     | Page |
| REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM                                             |     |    3 |
| FINANCIAL STATEMENTS:                                                                               |     |      |
| Statements of Net Assets Available for Benefits – December  31, 2024 and 2023                       |     |    4 |
| Statements of Changes in Net Assets Available for Benefits – Years ended December 31, 2024 and 2023 |     |    5 |
| Notes to Financial Statements                                                                       |     |    6 |
| SUPPLEMENTAL SCHEDULE:                                                                              |     |      |
| Schedule H, Line 4i – Schedule of Assets (Held at End of Year) – December 31, 2024                  |     |   12 |
| Exhibit Index                                                                                       |     |   13 |
| SIGNATURES                                                                                          |     |   14 |

NOTE: All other schedules required by the Department of Labor’s Rules and Regulations for Reporting and Disclosure under the Employee Retirement Income Security Act of 1974 (ERISA) have been omitted because they are not applicable.

<div align='center'>Report of Independent Registered Public Accounting Firm</div>

Plan Administrator and Plan Participants

Unisys