Company: FRFXF
Filing Date: 2025-11-06
Form Type: 6-K
Source: 0001628280-25-050311
Chunk: 0

Company: FAIRFAX FINANCIAL HOLDINGS LTD/ CAN
Filing Date: 2025-11-06
Form: 6-K
Chunk 0
---
### 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 November 2025

#### Commission File Number: 001-31556

### 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 ☒</div>

Exhibit 99.2 of this Form 6-K shall be incorporated by reference as an exhibit to the Registration Statement of Fairfax Financial Holdings Limited on Form F-10 (File No. 333-290660).

#### Exhibit Index

### 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.

### FAIRFAX FINANCIAL HOLDINGS LIMITED
| By: |     | /s/ Derek Bulas                                                       |
|     |     | Name:  Derek Bulas                                                    |
|     |     | Title:    Vice President, Chief Legal Officer and Corporate Secretary |

Dated: November 6, 2025