Company: FRFXF
Filing Date: 2025-07-31
Form Type: 6-K
Source: 0000915191-25-000011
Chunk: 0

Company: FAIRFAX FINANCIAL HOLDINGS LTD/ CAN
Filing Date: 2025-07-31
Form: 6-K
Chunk 0
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### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549

#### FORM 6-K

#### Report of Foreign Private Issuer

#### Pursuant to Rule 13a-16 or 15d-16

#### of the Securities Exchange Act of 1934

#### For the month of July 2025

#### Commission File Number: 033-71976

### FAIRFAX FINANCIAL HOLDINGS LIMITED
<div align='center'>(Translation of registrant’s name into English)</div>

#### 95 Wellington Street West

#### Suite 800

#### Toronto, Ontario

#### Canada M5J 2N7
<div align='center'>(Address of principal executive offices)</div>

Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F.

<div align='center'>Form 20-F ☐ Form 40-F ☒

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1):</div>

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7):

Indicate by check mark whether by furnishing the information contained in this Form, the registrant is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

Yes ☐ No ☒

If “Yes” is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): 82-N/A

The information contained in Exhibit 99.2 of this Form 6-K is incorporated by reference into the Registrant's registration statement on Form F-10 (File No. 333-271084).

### Signatures
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

| By: |     | /s/ Derek Bulas                                                       |
|     |     | Name:  Derek Bulas                                                    |
|     |     | Title:    Vice President, Chief Legal Officer and Corporate Secretary |

Dated: July 31, 2025

#### Exhibit Index