UNITED ~~STATES~~STATESSECURITIES AND EXCHANGE COMMISSIONWashington, D.C. 20549

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

Report of Foreign Private ~~Issuer~~IssuerPursuant to Rule 13a-16 or 15d-16under the Securities Exchange Act of

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

under the Securities Exchange Act of

1934

For the month of March, 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 Form 20-F or Form 40-F.

Form 20-F ☐ Form 40-F ☒ X

Exhibit 99.1 of this Form 6-K is incorporated by reference into the registrant’s registration statement on Form S-8 (File No. 333-269768).

Exhibits

99.1		Notice of Annual Meeting and Management Information Circular
99.2		Notice and Access - Notice of Annual and Special Meeting and Notice of Availability of Meeting Materials
99.3		Proxy Form and Request for Delivery of Financial Statements
99.4		Electronic Distribution Insert
99.5		Annual Report

Exhibits		Description
99.1		Sun Life Financial Inc. Amended and Restated Executive Stock Option Plan

SIGNATURE

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.

			Sun Life Financial Inc. (Registrant)
	Sun Life Financial Inc.
Date: March 13, 2026		By	/s/ Kevin Armitage
	(Registrant)
			Kevin Armitage AVP & Managing Counsel, Corporate Legal
Date: March 24, 2026	By	/s/ Kevin Armitage
		Kevin Armitage
		AVP & Managing Counsel, Corporate Legal

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