SUN LIFE FINANCIAL INC

4. Segmented Information

We have five reportable business segments: Canada, U.S., Asset Management, Asia, and Corporate. These business segments operate in the financial services industry and reflect our management structure and internal financial reporting. Asset Management includes the results of our MFS and SLC Management business units. Corporate includes the results of our UK business unit and our Corporate Support operations, which include run-off reinsurance operations, as well as investment income, expenses, capital and other items not allocated to our other business groups. Effective the second quarter of 2023, we completed the sale of our UK Business unit. We have retained our economic interest in the annuity business via a reinsurance arrangement that will be reported under the U.S. reportable segment on a prospective basis.

Revenues from our business segments are derived primarily from life and health insurance, investment management and annuities, and mutual funds. Revenues not attributed to the strategic business units are derived primarily from Corporate investments and earnings on capital. Transactions between segments are executed and priced at an arm's-length basis in a manner similar to transactions with third parties.

The expenses in each business segment may include costs or services directly incurred or provided on their behalf at the enterprise level. For other costs not directly attributable to one of our business segments, we use a management reporting framework that uses assumptions, judgments, and methodologies for allocating overhead costs and indirect expenses to our business segments.

Intersegment transactions consist primarily of internal financing agreements which are measured at fair values prevailing when the arrangements are negotiated. Intersegment investment income consists primarily of interest paid by U.S. to Corporate. Intersegment fee income is primarily asset management fees paid by our business segments to Asset Management. SLC Management collects fee income and incurs the operational expenses associated with the management of the general fund assets. Intersegment transactions are eliminated in the Consolidation adjustments column in the following tables.

Management considers its external Clients to be individuals and corporations. We are not reliant on any individual Client as none is individually significant to our operations.

40 Sun Life Financial Inc. December 31, 2023 Notes to the Consolidated Financial Statements

(1) Total revenue and total expenses exclude Investment result for insurance contracts for account of segregated fund holders.

Notes to the Consolidated Financial Statements Sun Life Financial Inc. December 31, 2023 41

Assets and liabilities by segment are as follows:

The revenue and assets of our business segments differ from geographic segments primarily due to the geographic segmenting of our Asset Management and Corporate segments.

The following table shows revenue by country for Asset Management and Corporate:

The following table shows total assets by country for Asset Management and Corporate:

42 Sun Life Financial Inc. December 31, 2023 Notes to the Consolidated Financial Statements