SECURITIES AND EXCHANGE COMMISSIONSEC FORM 17-C

CURRENT REPORT UNDER SECTION 17
OF THE SECURITIES REGULATION CODE
AND SRC RULE 17.2(c) THEREUNDER

1. Date of Report (Date of earliest event reported)

Aug 25, 2026

2. SEC Identification Number

N/A

3. BIR Tax Identification No.

N/A

4. Exact name of issuer as specified in its charter

Sun Life Financial Inc.

5. Province, country or other jurisdiction of incorporation

Canada

6. Industry Classification Code(SEC Use Only)

7. Address of principal office

1 York Street, Toronto, Ontario, Canada M5J 0B6 Postal Code M5J

8. Issuer's telephone number, including area code

1-416-979-9966

9. Former name or former address, if changed since last report

N/A

10. Securities registered pursuant to Sections 8 and 12 of the SRC or Sections 4 and 8 of the RSA

Title of Each Class	Number of Shares of Common Stock Outstanding and Amount of Debt Outstanding
Common	556,714,560

11. Indicate the item numbers reported herein

1

The Exchange does not warrant and holds no responsibility for the veracity of the facts and representations contained in all corporate disclosures, including financial reports. All data contained herein are prepared and submitted by the disclosing party to the Exchange, and are disseminated solely for purposes of information. Any questions on the data contained herein should be addressed directly to the Corporate Information Officer of the disclosing party.

Sun Life Financial Inc.SLF

PSE Disclosure Form 4-31 - Press Release References: SRC Rule 17 (SEC Form 17-C)
Section 4.4 of the Revised Disclosure Rules

Subject of the Disclosure
Press Release dated August 25, 2026: Sun Life and Wilton Re announce a strategic partnership, combining depth and breadth of capabilities across life and annuity reinsurance and asset management
Background/Description of the Disclosure
Press Release dated August 25, 2026: Sun Life and Wilton Re announce a strategic partnership, combining depth and breadth of capabilities across life and annuity reinsurance and asset management
Other Relevant Information
Press Release dated August 25, 2026: Sun Life and Wilton Re announce a strategic partnership, combining depth and breadth of capabilities across life and annuity reinsurance and asset management