Aflac (NYSE: AFL) owner trims stake under preset plan in latest filing

What happened

Aflac Inc (NYSE: AFL) said Japan Post Holdings Co., Ltd. sold 113,611 shares on 10/15/2026 under a Rule 10b5-1 plan. The Form 4 identifies Japan Post Holdings Co., Ltd. as a 10% owner.

The filing lists 88,114 shares at $118.19, 19,122 shares at $119.48 and 6,375 shares at $120.31. The trades totaled about $13.47 million, and Japan Post Holdings Co., Ltd. held 50,134,329 shares after the sale. It cut the reported holding from 50,247,940 shares before the trade to 50,134,329 afterward. That is the filing's central ownership change.

Key numbers

Metric	Latest	Change	Source
Shares sold	113,611 shares		SEC Form 4
Sale price range	from $118.19 to $120.31 per share		SEC Form 4
Reported proceeds	$13.47 million		SEC Form 4
Shares held after sale	50,134,329 shares		SEC Form 4
Sale as share of prior holding	about 0.2%		Calculated from SEC Form 4

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

Why it matters

OptimistFi's case is that Aflac creates durable value by selling sticky, employer-distributed supplemental accident & health insurance and managing an investment portfolio that funds benefits. The sale trims a large holder's position, but the 10b5-1 structure means the filing is less useful as a fresh verdict on Aflac's business.

The 113,611 shares were about 0.2% of the holding before the trade. That makes the move small relative to the remaining stake. Japan Post Holdings Co., Ltd. still reported 50,134,329 shares afterward, so the remaining stake is still sizable.

That matters because Japan Post Holdings Co., Ltd. remains a sizable owner even after the trim. The report is about ownership turnover, not a change in Aflac's core business. For investors, the key question is whether more sales follow under the same plan.

The tight price range from $118.19 to $120.31 a share suggests the shares were sold through multiple transactions rather than one block. At the reported prices, the sale looks orderly rather than abrupt. The strongest caveat is the Rule 10b5-1 trading plan, which points to a prearranged sale. That keeps the signal mixed even though Japan Post Holdings Co., Ltd. is a 10% owner.

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What's next

Any later Form 4 filing by Japan Post Holdings Co., Ltd. under the same Rule 10b5-1 plan will show whether the stake keeps declining. If sales continue, the position will keep shrinking from the 50,134,329 shares reported here. If they stop, this filing stays a limited snapshot of a planned reduction.

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