AFLAC INC

Insider Trading Arrangements

During the fourth quarter of 2023, the following directors or executive officers adopted orterminated a written plan intended to satisfy the affirmative defense conditions of Rule 10b5-1(c):

•On November 2, 2023, Charles D. Lake II, Chairman and Representative Director of Aflac Japan and President of Aflac International, adopted a trading plan that provides for the sale of 56% of performance-based restricted stock shares to be released upon approval of the Company's board of directors and will terminate no later than May 10, 2024. The estimated number of gross shares of Aflac Incorporated common stock to be acquired is 28,682; however, the actual number of shares may vary based on achievement of designated performance metrics.

•On November 3, 2023, Joseph L. Moskowitz, amember of the Company's board of directors, adopted a trading plan that provides for the sale of 2,400 shares of Aflac Incorporated common stock and will terminate no later than November 11, 2024.

•On November 7, 2023, Masatoshi Koide, President and Representative Director of Aflac Japan, adopted a trading plan that provides for the sale of 50% of performance-based restricted stock shares to be released upon approval of the Company's board of directors and will terminate no later than May 10, 2024. The estimated number of gross shares of Aflac Incorporated common stock to be acquired is 30,338; however, the actual number of shares may vary based on achievement of designated performance metrics.