Japan Post trust trims AFLAC (NYSE: AFL) stake by 10,100 shares

Rhea-AI Filing Summary

Japan Post Holdings Co., Ltd. reported indirect open-market sales of AFLAC Inc. common stock through a related trust structure. On March 19, 2026, J&A Alliance Holdings Corporation, as trustee of the J&A Alliance Trust, sold 10,100 shares in two transactions. One sale of 8,800 shares occurred at a weighted average price of $107.28 per share within a $106.74–$107.73 range, and another sale of 1,300 shares at a weighted average price of $108.28 within a $107.75–$108.62 range. Following these sales, entities tied to Japan Post indirectly held 52,078,600 AFLAC shares, indicating a very small reduction in a large existing position.

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

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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)
03/19/2026

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	03/19/2026		S		8,800	D	$107.28(1)	52,079,900	I	See footnote(2)
Common Stock	03/19/2026		S		1,300	D	$108.28(3)	52,078,600	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 $106.74 to $107.73 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 $107.75 to $108.62 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/ Nobuyasu Kato, Rep. Exec. Officer and Executive Vice President of Japan Post Holdings Co., Ltd.	03/23/2026
	** 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 activity did Japan Post Holdings report in AFL stock on this Form 4?

Japan Post Holdings reported indirect open-market sales of AFLAC Inc. (AFL) common stock. A trust-related entity sold a total of 10,100 shares on March 19, 2026, modestly reducing a much larger indirect ownership position in the company.

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

The filing shows two open-market sales totaling 10,100 AFLAC shares. One block of 8,800 shares sold at a weighted average of $107.28, and 1,300 shares sold at a weighted average of $108.28, each within specified intraday price ranges.

Who actually holds the AFLAC shares related to Japan Post Holdings in this Form 4?

The reported AFLAC shares are held by J&A Alliance Holdings Corporation as trustee of the J&A Alliance Trust. Japan Post Holdings may be deemed to beneficially own these shares as the Trust’s sole settlor and beneficiary, while various parties expressly disclaim beneficial ownership beyond pecuniary interest.

What is Japan Post’s remaining indirect AFLAC (AFL) position after these sales?

After the reported transactions, entities associated with Japan Post Holdings indirectly held 52,078,600 AFLAC common shares. The 10,100 shares sold represent only a very small fraction of this position, indicating a minor portfolio adjustment rather than a large-scale exit.

Were any derivatives or options involved in Japan Post’s AFLAC insider transactions?

No derivatives or options appear in this Form 4. The transactions involve only non-derivative common stock sales. The derivative position summary is empty, indicating no reported option exercises, conversions, or other derivative trades linked to these AFLAC insider sales.

How were the AFLAC (AFL) sale prices reported in the Form 4 footnotes?

The Form 4 reports weighted average prices for each sale. One sale ranged from $106.74 to $107.73 per share, and the other from $107.75 to $108.62. The reporting person will supply detailed price breakdowns upon regulatory or issuer request.