# EDGAR Filing Document

**Accession Number:** 0000004977
**File Stem:** 0001104659-26-024124
**Filing Date:** 2026-3
**Character Count:** 8226
**Document Hash:** e97f82f125f9837bc8a74be9b6e1ee0d
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001104659-26-024124.hdr.sgml**: 20260305

**ACCESSION NUMBER**: 0001104659-26-024124

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20260303

**FILED AS OF DATE**: 20260305

**DATE AS OF CHANGE**: 20260305

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Japan Post Holdings Co., Ltd.
- **CENTRAL INDEX KEY:** 0001783464

**ORGANIZATION NAME:**
- **STATE OF INCORPORATION:** M0
- **FISCAL YEAR END:** 0331

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-07434
- **FILM NUMBER:** 26726339

**BUSINESS ADDRESS:**
- **STREET 1:** 2-3-1 OTEMACHI
- **STREET 2:** CHIYODA-KU
- **CITY:** TOKYO
- **STATE:** M0
- **ZIP:** 100-8791
- **BUSINESS PHONE:** 81-2-3477-0212

**MAIL ADDRESS:**
- **STREET 1:** 2-3-1 OTEMACHI
- **STREET 2:** CHIYODA-KU
- **CITY:** TOKYO
- **STATE:** M0
- **ZIP:** 100-8791
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** AFLAC INC
- **CENTRAL INDEX KEY:** 0000004977
- **STANDARD INDUSTRIAL CLASSIFICATION:** ACCIDENT & HEALTH INSURANCE [6321]
- **ORGANIZATION NAME:** 02 Finance
- **EIN:** 581167100
- **STATE OF INCORPORATION:** GA
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 1932 WYNNTON RD
- **CITY:** COLUMBUS
- **STATE:** GA
- **ZIP:** 31999
- **BUSINESS PHONE:** 7063233431

**MAIL ADDRESS:**
- **STREET 1:** 1932 WYNNTON ROAD
- **CITY:** COLUMBUS
- **STATE:** GA
- **ZIP:** 31999

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** AMERICAN FAMILY CORP
- **DATE OF NAME CHANGE:** 19920306

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

[x] Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Japan Post Holdings Co., Ltd.<br><sub>(Last) (First) (Middle)</sub><br>2-3-1, OTEMACHI, CHIYODA-KU<br><sub>(Street)</sub><br>TOKYO, M0 100-8791<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2026-03-03 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>AFLAC INC [ AFL ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| Common Stock | 2026-03-03 |  | S |  | 4488 | D | 111.21<sup>(1)</sup> | 52295512 | I | See footnote<sup>(2)</sup> |
| Common Stock | 2026-03-03 |  | S |  | 14172 | D | 112.39<sup>(3)</sup> | 52281340 | I | See footnote<sup>(2)</sup> |
| Common Stock | 2026-03-03 |  | S |  | 640 | D | 112.75<sup>(4)</sup> | 52280700 | I | See footnote<sup>(2)</sup> |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

---

### Footnotes:

(1) The price reported represents the weighted average price of shares of Common Stock of Aflac Inc. (the "Issuer") sold in multiple transactions at prices ranging from $110.70 to $111.70 per share. The reporting person will provide to the Issuer, or the Securities and Exchange Commission staff, upon request, information regarding the number of shares sold at each price within the range.

(2) The reported securities are held directly by J&A Alliance Holdings Corporation ("J&A Holdings"), in its capacity as the trustee of the J&A Alliance Trust (the "Trust"). General Incorporated Association J&A Alliance ("General Incorporated") and Kenji Sano each may be deemed to beneficially own the securities held by J&A Holdings (in its capacity as trustee of the Trust) because (i) General Incorporated owns J&A Holdings and (ii) Kenji Sano owns 100% of the equity interests in General Incorporated. Japan Post Holdings Co., Ltd. ("Japan Post") may be deemed to beneficially own the shares of common stock owned directly by J&A Holdings, in its capacity as the trustee of the Trust, due to its role as the sole settlor and beneficiary of the Trust. Each of General Incorporated, Kenji Sano and Japan Post expressly disclaim beneficial ownership of the reported securities except to the extent of its pecuniary interest therein.

(3) The price reported represents the weighted average price of shares of Common Stock of the Issuer sold in multiple transactions at prices ranging from $111.71 to $112.71 per share. The reporting person will provide to the Issuer, or the Securities and Exchange Commission staff, upon request, information regarding the number of shares sold at each price within the range.

(4) The price reported represents the weighted average price of shares of Common Stock of the Issuer sold in multiple transactions at prices ranging from $112.72 to $112.79 per share. The reporting person will provide to the Issuer, or the Securities and Exchange Commission staff, upon request, information regarding the number of shares sold at each price within the range.

**Signature:** /s/ Nobuyasu Kato, Rep. Exec. Officer and Executive Vice President of Japan Post Holdings Co., Ltd.  
**Date:** 2026-03-05

### Remarks:

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

**Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.**