Company: MATV
Filing Date: 2025-06-27
Form Type: 11-K
Source: 0001000623-25-000041
Chunk: 0

Company: Mativ Holdings, Inc.
Filing Date: 2025-06-27
Form: 11-K
Chunk 0
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### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### WASHINGTON, D.C. 20549

#### FORM 11-K
<div align='center'>(Mark One)</div>

#### [X]

#### ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE

#### SECURITIES EXCHANGE ACT OF 1934
<div align='center'>For the fiscal year ended</div>

#### December 31, 2024

#### OR
#### [ ]

<div align='center'>TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from_____________to___________

Commission file number</div>

#### 1-13948
<div align='center'>A. Full title of the Plan and the address of the Plan, if different from that of the issuer named below:</div>

#### Mativ Holdings, Inc. 401(k) Retirement Plan
<div align='center'>(formerly SWM Retirement Savings Plan II)

B. Name of issuer of the securities held pursuant to the Plan and the address of its principal executive offices:</div>

| Mativ Holdings, Inc.         |
| 100 Kimball Place, Suite 600 |
| Alpharetta, Georgia 30009    |

#### 1.

#### Financial Statements and Schedules
The financial statements and supplemental schedules for the plan have been prepared in accordance with the Employee Retirement Income Security Act of 1974, and are filed as Exhibit 99.1 hereto and incorporated by reference herein.

#### 2.

#### SWM Retirement Savings Plan II
The Report of Independent Registered Public Accounting Firm with respect to the financial statements and supplemental schedules of the Mativ Holdings, Inc. 401(k) Retirement Plan (formerly SWM Retirement Savings Plan II) is set forth in such financial statements and supplemental schedules filed as Exhibit 99.1 hereto and incorporated by reference herein.

#### 3.

#### Exhibits
| Exhibit |      |     | Description                                                                                                                           |
|         | 23.1 |     | Consent of Moore, Colson & Company, P.C., Registered Independent Public Accounting Firm.                                              |
|         | 23.2 |     | Consent of Warren Averett, LLC, Registered Independent Public Accounting Firm.                                                        |
|         | 99.1 |     | Mativ Holdings, Inc. 401(k) Retirement Plan (formerly SWM Retirement Savings Plan II) Financial Statements and