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SEC.gov | Request Rate Threshold Exceeded

U.S. Securities and Exchange Commission

You’ve Exceeded the SEC’s Traffic Limit

Your request rate has exceeded the SEC’s maximum allowable requests per second. Your access to SEC.gov will be limited for 10 minutes.

Current guidelines limit each user to a total of no more than 10 requests per second, regardless of the number of machines used to submit requests. To ensure that SEC.gov remains available to all users, we reserve the right to block IP addresses that submit excessive requests.

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For best practices on efficiently downloading information from SEC.gov, including the latest EDGAR filings, visit sec.gov/developer. You can also sign up for email updates on the SEC open data program, including best practices that make it more efficient to download data, and SEC.gov enhancements that may impact scripted downloading processes. For more information, contact opendata@sec.gov.

For more information, please see the SEC’s Web Site Privacy and Security Policy. Thank you for your interest in the U.S. Securities and Exchange Commission.

Reference ID: 0.e618d017.1785156364.360252a3

More Information

Internet Security Policy

By using this site, you are agreeing to security monitoring and auditing. For security purposes, and to ensure that the public service remains available to users, this government computer system employs programs to monitor network traffic to identify unauthorized attempts to upload or change information or to otherwise cause damage, including attempts to deny service to users.

Unauthorized attempts to upload information and/or change information on any portion of this site are strictly prohibited and are subject to prosecution under the Computer Fraud and Abuse Act of 1986 and the National Information Infrastructure Protection Act of 1996 (see Title 18 U.S.C. §§ 1001 and 1030).

To ensure our website performs well for all users, the SEC monitors the frequency of requests for SEC.gov content to ensure automated searches do not impact the ability of others to access SEC.gov content. We reserve the right to block IP addresses that submit excessive requests. Current guidelines limit users to a total of no more than 10 requests per second, regardless of the number of machines used to submit requests.

If a user or application submits more than 10 requests per second, further requests from the IP address(es) may be limited for a brief period. Once the rate of requests has dropped below the threshold for 10 minutes, the user may resume accessing content on SEC.gov. This SEC practice is designed to limit excessive automated searches on SEC.gov and is not intended or expected to impact individuals browsing the SEC.gov website.

Note that this policy may change as the SEC manages SEC.gov to ensure that the website performs efficiently and remains available to all users.

Note: We do not offer technical support for developing or debugging scripted downloading processes.

afl-202602040000004977false00000049772026-02-042026-02-040000004977exch:XNYS2026-02-042026-02-04

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) February 4, 2026

Aflac Incorporated

(Exact name of registrant as specified in its charter)

Georgia001-07434  58-1167100 (State or other jurisdiction(Commission  (IRS Employer of incorporation)File Number)  Identification No.)

1932 Wynnton RoadColumbusGeorgia31999 (Address of principal executive offices)  (Zip Code)

706.323.3431

(Registrant’s telephone number, including area code)

(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:

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

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

Title of each classTrading Symbol(s)Name of each exchange on which registered Common Stock, $.10 Par ValueAFLNew York Stock Exchange

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 2.02 Results of Operations and Financial Condition. On February 4, 2026, Aflac Incorporated (the "Company") issued a press release dated February 4, 2026 in which it reported the Company's 2025 fourth quarter and full year 2025 financial results. A copy of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and incorporated by reference herein in its entirety. In addition, a copy of the Company's fourth quarter supplemental earnings materials is furnished as Exhibit 99.2 to this Current Report on Form 8-K and incorporated by reference herein in its entirety. Item 7.01 Regulation FD Disclosure. On February 4, 2026, the Company posted to its investor relations website at investors.aflac.com a video presentation by Max Brodén, the Company's Senior Executive Vice President and Chief Financial Officer, discussing the Company's 2025 fourth quarter and full year 2025 financial results. A copy of the transcript of Mr. Brodén's comments from the Investor Update and a copy of the Investor Presentation are furnished as Exhibit 99.3 and Exhibit 99.4 to this Current Report on Form 8-K, respectively, and are incorporated by reference herein in their entirety. The Investor Update and the Investor Presentation should be read in conjunction with the press release.

Item 9.01 Financial Statements and Exhibits. (d) Exhibits.

Exhibit NumberExhibit Title or Description 99.1 Press release of Aflac Incorporated dated February 4, 2026

99.2 Financial Supplement for Fourth Quarter 2025

99.3 Transcript of comments in video presentation by Max Brodén, Senior Executive Vice President and Chief Financial Officer of Aflac Incorporated. 99.4 Slides referenced in video presentation by Max Brodén, Senior Executive Vice President and Chief Financial Officer of Aflac Incorporated. 104Cover Page Interactive Data File (the cover page XBRL tags are embedded within the Inline XBRL document)

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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.

Aflac Incorporated

February 4, 2026  /s/ Robin L. Blackmon (Robin L. Blackmon) Senior Vice President, Financial Services Chief Accounting Officer

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