Aflac’s Japan Post sells 13,000 shares under trading plan (NYSE: AFL)

What happened

Aflac Inc. (NYSE: AFL) filed a Form 4 showing Japan Post Holdings Co., Ltd., a 10% owner, sold 13,000 shares on 2026-10-05. The shares sold for $112.25 each, or about $1.46 million in total.

The filing says the sale was made under a Rule 10b5-1 trading plan. After the sale, Japan Post Holdings held 50,407,190 shares of Aflac common stock. The form says the shares were sold in multiple transactions at prices from $111.85 to $112.47 per share. That range matches the weighted average price reported for the sale.

Key numbers

Metric	Latest	Change	Source
Shares sold	13,000 shares		SEC Form 4
Sale price per share	$112.25		SEC Form 4
Total value	about $1.46 million		SEC Form 4
Shares held after sale	50,407,190 shares		SEC Form 4
Sale price range	$111.85 to $112.47		SEC Form 4

Read more: Aflac (AFL) stock analysis and investment case

Why it matters

OptimistFi's view is that Aflac creates durable value by selling employer-distributed supplemental insurance and managing an investment portfolio that funds benefits. This filing does not change that view, because it reports a planned stock sale by a large holder, not a business update. OptimistFi's calculation puts the 13,000 shares at about 0.0% of the holding before the trade.

Japan Post Holdings still held 50,407,190 shares after the sale, so the position stayed above 50 million shares. The key point is that the filing shows an ownership change under a trading plan, not a discretionary signal about Aflac's business. The sale price also sits inside the filing's stated range, so the report is about execution, not valuation.

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What's next

Aflac's next quarterly report is the next scheduled check on whether the company still fits OptimistFi's case. Results that show steady premium flows and a strong capital base would support the unchanged view.

A weaker report would matter more than this planned sale, because it would speak to the business rather than to ownership. Until then, this Form 4 mainly serves as a baseline for tracking ownership changes in Aflac.

If the next report shows no change in Aflac's operating case, this sale should stay a side note for investors. If it does change, that report would matter more because it would speak to the business, not the holder's plan.

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