Japan Post stock steady after insider sale of Aflac shares

Published on 09/19/2026 at 14:07 | Editorial responsibility: Rafael Müller, Editor-in-Chief AD HOC NEWS

Japan Post stock remains steady as of September 19, 2026 after Japan Post Holdings sold 13,800 Aflac shares on September 16, 2026 for about USD 1.62 million. The transactions trimmed its Aflac stake by roughly 0.03 percent while it still indirectly holds over 50 million shares.

Japan Post, JP3823600002, Illustration mit AI erstellt.

Japan Post Holdings Co., Ltd. stock (ISIN JP3823600002) is trading steadily as of September 19, 2026, while the group draws attention for insider sales of Aflac shares totaling about USD 1.62 million on September 16, 2026 according to StockTitan.

Aflac stake trimmed but remains large

According to StockTitan on September 18, 2026, Japan Post Holdings, a greater-than-10 percent shareholder in Aflac Inc., indirectly sold a total of 13,800 Aflac shares in two open market transactions on September 16, 2026 under a Rule 10b5-1 trading plan.

The filing shows that 2,986 shares were sold at a weighted average price of USD 116.89 per share and 10,814 shares at a weighted average price of USD 117.66 per share, resulting in aggregate proceeds of about USD 1.62 million and representing a roughly 0.03 percent reduction in Japan Post’s Aflac position according to MarketBeat.

Impact for investors in Japan Post stock

As reported by MarketBeat on September 18, 2026, Japan Post Holdings still indirectly owns 50,557,190 Aflac shares after the sale, with the stake valued at roughly USD 5.94 billion at an Aflac share price of about USD 117.49, underlining that the trimmed position remains a significant financial asset on Japan Post’s balance sheet.

Aflac shares were quoted around USD 116.20 during trading on September 18, 2026, slightly below the prior close of about USD 116.60, illustrating that the insider sale coincided with only a modest intraday move in Aflac’s market price according to MarketBeat.

Japan Post stock and portfolio considerations

For shareholders of Japan Post stock, the transaction highlights the group’s ongoing portfolio management, as it monetizes a small portion of its long-held Aflac stake while maintaining exposure to the US insurer’s earnings and dividends as a major shareholder according to Investing.com.

The modest 0.03 percent reduction in Aflac share count compared with the remaining 50,557,190 shares means that the financial impact on Japan Post’s overall asset base is limited in percentage terms, even though the sale proceeds of roughly USD 1.62 million are meaningful in absolute value according to StockTitan.

Stock price context

Japan Post stock is listed on the Tokyo Stock Exchange, and the reference price for investors is the yen quotation on that primary venue as of the most recent completed trading day prior to September 19, 2026, with the stock trading in its usual range in a stable pattern relative to recent weeks.