Japan Post Holdings Co., Ltd., a major insider in Aflac, sold 16,639 shares on March 12, 2026 at $109.58 per share, for a total value of about $1.82 million. Because Japan Post is a large, strategic shareholder rather than a typical individual executive, its trades can matter to investors as signals of ownership changes and potential shifts in long-term positioning. This sale is also part of a clear, recent pattern. Over the last week shown in filings, Japan Post reported multiple consecutive sales: about $1.74 million on March 13, $1.73 million on March 16, $1.72 million on March 17, and $864,360 on March 18, in addition to the March 12 transaction. A cluster of back-to-back sales like this often points to an organized reduction in stake (for example, following a plan or portfolio rebalancing), rather than a one-off decision tied to a single day’s news. Other insiders have also been selling shares in the same period, including Koide Masatoshi and Lake Charles D II, which adds to the broader picture of net insider selling. For retail investors, the key takeaway is that a significant shareholder has been steadily trimming exposure in a short timeframe, which is more notable than an isolated sale.