UNITED STATES

SECURITIES AND EXCHANGE COMMISSION ~~Washington, D.C. 20549~~

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~~Pursuant ~~the~~to ~~month~~Rule of13a-16 ~~December~~or ~~2025 Commission File Number: 001~~15d-~~15014~~16

under the Securities Exchange Act of

1934

For the month of February, 2026 Commission File Number:001-15014

SUN LIFE FINANCIAL INC.

(Translation of registrant'’s name into English)

1 York Street, 31st Floor, Toronto, Ontario, M5J 0B6

(Address of principal executive offices)

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

Form 20-F ☐ Form 40-F ☒ X

Exhibits		Description
99.1		News Release dated December 1, 2025

Exhibit

99.1 Press Release dated February 11, 2026 – Sun Life Reports Fourth Quarter and Full Year 2025 Results

99.2 Certificates of the Chief Executive Officer and Chief Financial Officer pursuant to Canadian National Instrument 52-109 – Certification of Disclosure in Issuers’ Annual and Interim Filings

99.3 Earnings Coverage Ratio pursuant to Canadian National Instrument 44-102 – Shelf Distributions

99.4 Annual Board Charter

SIGNATURE

Pursuant to the ~~requirement~~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.

	Sun Life Financial Inc. (Registrant)
Date: December 1, 2025	By:	/s/ “Kevin Armitage”
		Kevin Armitage
		AVP & Managing Counsel, Corporate Legal

Sun Life Financial Inc.

(Registrant)

Date: February 11, 2026 By /s/ Kevin Armitage

Kevin Armitage

AVP & Managing Counsel, Corporate Legal

Exhibit 99.1

Exhibit 99.2

Exhibit 99.3

Exhibit 99.4

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