As filed with the Securities and Exchange Commission on February 13, 2025

Registration No. 333-______

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM S-8

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933

SUN LIFE FINANCIAL INC.

(Exact Name of Registrant as Specified in Its Charter)

1 York Street, 31st Floor

Toronto, Ontario, Canada

M5J 0B6

(Address, Including Zip Code of Principal Executive Offices)

Sun Life Financial (U.S.) Services Company, Inc. Employee Stock Purchase Plan

Sun Life Investments LLC Employee Stock Purchase Plan

(Full title of Plans)

Sun Life Assurance Company of Canada - U.S. Operations Holdings, Inc.

One Sun Life Executive Park

Wellesley Hills, Massachusetts 02481

(781) 247-6030

(Name, address and telephone number, including area code, of agent for service)

Copies to:

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company" and "emerging growth company" in Rule 12b-2 of the Exchange Act.

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act  ☐

EXPLANATORY NOTE

This registration statement on Form S-8 (the "Registration Statement") is being filed for the purpose of registering 1,000,000 common shares, without par value (the "Common Shares"), of Sun Life Financial Inc. (the "Registrant"), which may be offered pursuant to awards under the Sun Life Financial (U.S.) Services Company, Inc. Employee Stock Purchase Plan and the Sun Life Investments LLC Employee Stock Purchase Plan.

PART I

INFORMATION REQUIRED IN THE SECTION 10(A) PROSPECTUS

The documents containing the information specified in Item 1 and Item 2 of Part I of Form S-8 will be delivered to participants as specified by Rule 428(b)(1) under the Securities Act. In accordance with the rules and regulations of the Securities and Exchange Commission (the "Commission") and the instructions to Form S-8, such documents are not being filed with the Commission either as part of this Registration Statement or as prospectuses or prospectus supplements pursuant to Rule 424 under the Securities Act.

PART II

INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

Item 3. Incorporation of Documents by Reference.

The following documents, which have heretofore been filed by the Registrant with the Commission pursuant to the Securities Exchange Act of 1934, as amended (the "Exchange Act"), are incorporated by reference herein and shall be deemed to be a part hereof:

In addition, all documents or reports subsequently filed by the Registrant with the Commission pursuant to Sections 13(a), 13(c), 14 and 15(d) of the Exchange Act after the date of this Registration Statement and prior to the filing of a post-effective amendment to this Registration Statement which indicates that all securities offered hereby have been sold or which deregisters all securities offered hereby then remaining unsold, shall be deemed to be incorporated by reference into this Registration Statement and to be a part hereof from the date of the filing of such documents or reports; provided that reports on Form 6-K shall only be deemed so incorporated by reference to the extent expressly stated therein.

Any statement contained in a document or report incorporated or deemed to be incorporated by reference herein shall be deemed to be modified or superseded for the purposes of this Registration Statement to the extent that a statement contained herein (or in any other subsequently filed document or report which also is incorporated or deemed to be incorporated by reference herein) modifies or supersedes such statement. Any such statement so modified or superseded shall not be deemed, except as so modified or superseded, to constitute a part of this Registration Statement.

Item 4. Description of Securities.

Not applicable.

Item 5. Interests of Named Experts and Counsel.

Not applicable. No original issuance Common Shares are to be registered hereunder, therefore no opinion of counsel regarding the legality of the Common Shares being registered hereunder is required.

Item 6. Indemnification of Directors and Officers.

Subject to any limitations contained in the Insurance Companies Act (Canada), S.C. 1991, c.47, as amended, the by-laws of the Registrant provide that the Registrant shall indemnify a director or an officer, a former director or officer or any person who acts or acted, at the Registrant's request, as a director or officer of, or in a similar capacity for, another entity, and each of such person's heirs and personal representatives, against all costs, charges and expenses, including an amount paid to settle an action or satisfy a judgment, reasonably incurred by such person in respect of any civil, criminal, administrative, investigative or other proceeding in which such person is or was involved because of that association with the Registrant or such other entity, if (a) such person acted honestly and in good faith with a view to the best interests of, as the case may be, the Registrant or such other entity, and (b) in the case of a criminal or administrative action or proceeding enforced by a monetary penalty, such person had reasonable grounds for believing that their conduct was lawful. The by-laws also provide that the Registrant may enter into agreements evidencing its indemnity in favor of the foregoing persons to the full extent permitted by law.

The Registrant has entered into indemnification agreements with a number of its officers and directors under which the Registrant has agreed to indemnify them against costs, charges, fines and expenses, including amounts paid to settle an action or satisfy a judgment, reasonably incurred by an officer or director in respect of any civil, criminal or administrative action or proceeding to which such person is made a party by reason of being or having been a director or officer of the Registrant, subject to any limitations contained in the Insurance Companies Act (Canada), S.C. 1991, c.47, as amended. The Registrant also has entered into similar agreements with individuals who serve at the written request of the Registrant as a director, officer employee, trustee, agent or fiduciary of another entity.

Item 7. Exemption from Registration Claimed.

Not applicable.

Item 8. Exhibits.

Item 9. Undertakings.

provided, however, that paragraphs (a)(1)(a) and (a)(1)(b) do not apply if the information required to be included in a post-effective amendment by those paragraphs is contained in reports filed with or furnished to the Commission by the Registrant pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 that are incorporated by reference into this Registration Statement.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing this Registration Statement on Form S-8 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Toronto, Province of Ontario, Canada, on this 13^th day of February, 2025.

POWER OF ATTORNEY

Each person whose signature appears below constitutes and appoints Troy Krushel, Sandra Perri and Tracie Allan, his or her true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, and in any and all capacities, to sign any and all amendments to this registration statement, and to file the same, with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, state securities law administrators, and other governmental authorities, granting unto said attorney-in-fact and agent full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully and to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorney-in-fact and agent, or his or her respective substitute, may lawfully do or cause to be done by virtue thereof.

Pursuant to the requirements of the Securities Act of 1933, as amended, this Registration Statement has been signed by the following persons in the capacities on February 13, 2025.

SIGNATURE OF AUTHORIZED U.S. REPRESENTATIVE OF THE REGISTRANT

Pursuant to the requirements of Section 6(a) of the Securities Act, the undersigned, the Registrant's duly authorized representative in the United States has signed this Registration Statement on this 13^th day of February, 2025: