Company: SLFQF
Filing Date: 2025-02-13
Form Type: 6-K
Source: 0001062993-25-002325
Chunk: 0

Company: SUN LIFE FINANCIAL INC
Filing Date: 2025-02-13
Form: 6-K
Chunk 0
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<div align='center'>UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

Report of Foreign Private Issuer

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

under the Securities Exchange Act of

1934

For the month of February, 2025Commission File Number:001-15014

SUN LIFE FINANCIAL INC.(Translation of registrant's name into English)

(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-FForm 40-F</div>

Exhibit

| 99.1 | Notice of Meeting Date and Record Date |

<div align='center'>SIGNATURE</div>

Pursuant to the requirement 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.

| Date: February 13, 2025 | Sun Life Financial Inc. 
 (Registrant)            
 By                      | /s/ Tracie Allan                               |
|:------------------------|:------------------------|:-----------------------------------------------|
|                         |                         | Tracie Allan                                   |
|                         |                         | VP, Associate General Counsel, Corporate Legal |