8-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported) May 4, 2026

Aflac Incorporated

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(Exact name of registrant as specified in its charter)

706.323.3431

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(Registrant’s telephone number, including area code)

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(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

Securities registered pursuant to Section 12(b) of the Act:

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

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 13(a) of the Exchange Act. ¨

Item 5.07    Submission of Matters to a Vote of Security Holders

The Annual Meeting of the Shareholders of Aflac Incorporated (the "Company") was held on May 4, 2026. Matters submitted to the shareholders and voted upon at the meeting, which are more fully described in the Company's Proxy Statement, are as follows:

(1) Election of 11 members to the board of directors;

(2) Approval of a non-binding advisory proposal on compensation of the Company's named executive officers as described in the Proxy Statement;

(3) Ratification of the appointment of KPMG LLP as the independent registered public accounting firm of the Company for the year ending December 31, 2026; and

(4) Shareholder proposal regarding an independent board chairman.

The shareholders approved proposals (1), (2) and (3). The shareholders did not approve proposal (4).

The total number of shares of the Company’s Common Stock entitled to vote at the meeting was 515,183,672, of which 85,520,827 directly registered shares were entitled to ten votes per share and 23,397,450 shares held in “street” or “nominee” name exercised ten votes per share. The total number of voting rights at the meeting was 1,495,448,165.

The shares owned by J&A Alliance Trust (the "Trust") represented, in aggregate, 20% of the total voting power of the Company's Common Stock. The Shareholders Agreement, entered into on February 28, 2019, by the Company, Japan Post Holdings Co., Ltd., J&A Alliance Holdings Corporation, solely in its capacity as trustee of the Trust, and General Incorporated Association J&A Alliance, provides voting restrictions that require the Trust to vote (i) all shares representing voting rights in excess of 20% of the voting rights in the Company and (ii) all of its shares in connection with a change in control transaction, in each case, in a manner proportionally equal to votes of shares not beneficially owned by the Trust. For more information about the forgoing, please see the Company's Proxy Statement.

The following is a summary of the votes cast, as well as the number of abstention and broker non-votes, as to each proposal, including a separate tabulation with respect to each nominee for director.

SIGNATURES

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 hereunto duly authorized.

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