Japan Post (NYSE: AFL) affiliate sells 23,500 AFLAC shares in open market

Rhea-AI Filing Summary

Japan Post Holdings Co., Ltd., reporting as a more-than-10% owner of AFLAC Inc, disclosed indirect open-market sales of AFLAC common stock through an affiliated trust structure. An entity called J&A Alliance Holdings Corporation, acting as trustee of the J&A Alliance Trust, sold a total of 23,500 shares on May 15, 2026 in two transactions at weighted average prices around $116.81–$117.35 per share, across detailed price ranges. After these sales, the trust still holds a very large stake, with filings indicating an indirect position exceeding 51 million shares, so the activity represents only a small fraction of the overall holding.

Insider Trade Summary 10b5-1

Net Seller: 23,500 shares ($2,745,886)

Net Sell 2 txns

Insider Japan Post Holdings Co., Ltd.

Role null

Sold 23,500 shs ($2.75M)

Type	Security	Shares	Price	Value
Sale	Common Stock	21,925	$116.81	$2.56M
Sale	Common Stock	1,575	$117.35	$185K

Holdings After Transaction: Common Stock — 51,517,920 shares (Indirect, See footnote)

Footnotes (1)

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 $116.28 to $117.28 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. 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"), Kenji Sano and Tetsuya Numaguchi 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 and Tetsuya Numaguchi each own 50% 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, Tetsuya Numaguchi and Japan Post expressly disclaim beneficial ownership of the reported securities except to the extent of its pecuniary interest therein. The price reported represents the weighted average price of shares of Common Stock of the Issuer sold in multiple transactions at prices ranging from $117.285 to $117.45 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.

Key Figures

Total shares sold: 23,500 shares First block sold: 1,575 shares Second block sold: 21,925 shares +3 more

6 metrics

Total shares sold 23,500 shares Open-market sales of AFLAC common stock on May 15, 2026

First block sold 1,575 shares AFLAC common stock, open-market sale on May 15, 2026

Second block sold 21,925 shares AFLAC common stock, open-market sale on May 15, 2026

Weighted avg price (first sale range) $116.28–$117.28 per share Price range for first group of open-market sales

Weighted avg price (second sale range) $117.285–$117.45 per share Price range for second group of open-market sales

Indirect holdings after sales Over 51,000,000 shares Approximate AFLAC stake indirectly held via trust structure

Key Terms

weighted average price, beneficially own, pecuniary interest, indirect ownership

4 terms

weighted average price financial

"The price reported represents the weighted average price of shares of Common Stock of Aflac Inc."

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

beneficially own financial

"each may be deemed to beneficially own the securities held by J&A Holdings"

Beneficially own means having the economic rights and risks of a security—such as the right to receive dividends, sell the shares, or profit from price changes—whether or not your name appears on the official share register. Think of it like renting a car: you use it and reap the benefits even if the title lists someone else. Investors care because beneficial ownership determines who truly controls value, must be disclosed under securities rules, and can signal potential influence or trading activity that affects a stock’s price.

pecuniary interest financial

"expressly disclaim beneficial ownership of the reported securities except to the extent of its pecuniary interest therein"

indirect ownership financial

"The reported securities are held directly by J&A Alliance Holdings Corporation, in its capacity as the trustee of the Trust"

Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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^*

Japan Post Holdings Co., Ltd.

(Last) (First) (Middle)

2-3-1, OTEMACHI, CHIYODA-KU

(Street)

TOKYO 100-8791

(City) (State) (Zip)

JAPAN

(Country)

2. Issuer Name and Ticker or Trading Symbol
AFLAC INC [ AFL ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/15/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	05/15/2026		S		21,925	D	$116.81(1)	51,517,920	I	See footnote(2)
Common Stock	05/15/2026		S		1,575	D	$117.35(3)	51,516,345	I	See footnote(2)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

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 $116.28 to $117.28 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"), Kenji Sano and Tetsuya Numaguchi 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 and Tetsuya Numaguchi each own 50% 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, Tetsuya Numaguchi 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 $117.285 to $117.45 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.

	/s/ Yuki Takemura, Senior General Manager, as attorney-in-fact for Nobuyasu Kato	05/19/2026
	** Signature of Reporting Person	Date
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.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did Japan Post Holdings report in AFLAC (AFL) stock?

Japan Post Holdings, as a more-than-10% owner of AFLAC, reported indirect open-market sales totaling 23,500 shares of AFLAC common stock on May 15, 2026, executed through a trust-managed entity that holds its large stake.

At what prices were the AFLAC (AFL) shares sold by the Japan Post-related entity?

The disclosed AFLAC shares were sold at weighted average prices around $116.81–$117.35 per share, across multiple trades within price ranges of $116.28–$117.28 and $117.285–$117.45, as detailed in the transaction footnotes.

How many AFLAC (AFL) shares did the Japan Post-related trust sell in this Form 4?

The trust-related entity sold a total of 23,500 AFLAC common shares, split into transactions of 1,575 shares and 21,925 shares. These sales are small relative to the more than 51 million shares indirectly held afterward.

Who actually holds the AFLAC (AFL) shares linked to Japan Post Holdings?

The reported AFLAC shares are held directly by J&A Alliance Holdings Corporation as trustee of the J&A Alliance Trust. Japan Post may be deemed a beneficial owner as sole settlor and beneficiary but expressly disclaims ownership beyond its pecuniary interest.

Is the Form 4 sale a major change in Japan Post’s AFLAC (AFL) position?

The Form 4 shows sales of 23,500 shares, while the trust structure still holds over 51 million shares. This indicates the reported transactions represent only a small portion of the overall indirect stake in AFLAC common stock.