Japan Post-linked trust trims AFLAC (AFL) stake with 41,700-share sale

Rhea-AI Filing Summary

J&A Alliance Holdings Corporation, acting as trustee of the J&A Alliance Trust, reported open-market sales of Aflac Inc. common stock associated with Japan Post Holdings Co., Ltd..

The trust sold a total of 41,700 shares of Aflac common stock on May 18, 2026 in two transactions at weighted average prices around $118 per share, within disclosed ranges between about $117.30 and $118.80. These shares are held indirectly for Japan Post, which may be deemed to beneficially own them as sole settlor and beneficiary of the trust but expressly disclaims beneficial ownership beyond its pecuniary interest. The filing indicates the trust still holds a very large remaining position in Aflac shares.

Insider Trade Summary 10b5-1

Net Seller: 41,700 shares ($4,939,291)

Net Sell 2 txns

Insider Japan Post Holdings Co., Ltd.

Role null

Sold 41,700 shs ($4.94M)

Type	Security	Shares	Price	Value
Sale	Common Stock	13,748	$118.16	$1.62M
Sale	Common Stock	27,952	$118.59	$3.31M

Holdings After Transaction: Common Stock — 51,502,597 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 $117.30 to $118.30 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 $118.305 to $118.80 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

Shares sold (first tranche): 27,952 shares Price per share (first tranche): $118.59/share Shares sold (second tranche): 13,748 shares +4 more

7 metrics

Shares sold (first tranche) 27,952 shares Aflac common stock sold May 18, 2026

Price per share (first tranche) $118.59/share Weighted average sale price May 18, 2026

Shares sold (second tranche) 13,748 shares Aflac common stock sold May 18, 2026

Price per share (second tranche) $118.16/share Weighted average sale price May 18, 2026

Total shares sold 41,700 shares Net shares sold across both transactions

Price range (first sale block) $117.30–$118.30/share Multiple trades aggregated into weighted average

Price range (second sale block) $118.305–$118.80/share Multiple trades aggregated into weighted average

Key Terms

weighted average price, beneficially own, trustee, pecuniary interest, +1 more

5 terms

weighted average price financial

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

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.

trustee financial

"held directly by J&A Alliance Holdings Corporation in its capacity as the trustee of the J&A Alliance Trust"

A trustee is a person or institution legally appointed to hold and manage assets or enforce an agreement on behalf of other people (beneficiaries). Think of a trustee as a neutral referee or custodian who must act in the beneficiaries’ best interests, follow the trust or contract rules, and handle distributions, recordkeeping and enforcement. Investors care because a trustworthy trustee protects their rights, ensures promised payments or remedies are delivered, and can influence recoveries if things go wrong.

pecuniary interest financial

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

settlor and beneficiary financial

"Japan Post may be deemed to beneficially own the shares ... due to its role as the sole settlor and beneficiary 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)
05/18/2026

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	05/18/2026		S		13,748	D	$118.16(1)	51,502,597	I	See footnote(2)
Common Stock	05/18/2026		S		27,952	D	$118.59(3)	51,474,645	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 $117.30 to $118.30 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 $118.305 to $118.80 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	05/20/2026
	** 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 transactions did AFLAC (AFL) report in this Form 4?

Aflac Inc. reported indirect insider sales of common stock linked to Japan Post through a trust. J&A Alliance Holdings, as trustee, sold a total of 41,700 AFL shares in two open-market transactions on May 18, 2026 at weighted average prices near $118 per share.

Who actually sold the AFLAC (AFL) shares in this filing?

The reported shares were sold by J&A Alliance Holdings Corporation in its role as trustee of the J&A Alliance Trust. Japan Post Holdings may be deemed to beneficially own the shares through its role as sole settlor and beneficiary of the trust but disclaims full beneficial ownership.

How many AFLAC (AFL) shares were sold and at what prices?

A total of 41,700 Aflac common shares were sold in two tranches: 27,952 shares at a weighted average price of $118.59 and 13,748 shares at $118.16. Footnotes show underlying trade prices ranged from $117.30 to $118.80 per share across the transactions.

Are the AFLAC (AFL) sales by Japan Post considered open-market transactions?

Yes, the transactions are classified as open-market sales. The filing codes both trades as “S,” described as sales in open market or private transactions, with disclosed weighted average prices and detailed price ranges available upon request from the reporting person.

Does Japan Post still hold a significant position in AFLAC (AFL) after these sales?

The filing indicates a very large remaining Aflac position held through the J&A Alliance Trust. Reported post-transaction share balances show tens of millions of AFL shares still indirectly held, so the 41,700 shares sold represent only a small fraction of the overall stake.