Aflac shares slipped 4.1% to $57.87 in late trading after the results.
Net income came in at $483 million, or $1 a share, up 16% from a year earlier when the health insurer made $415 million, or 84 cents a share. Operating earnings, which exclude net realized investment gains and losses, were $487 million, or $1.01 a share, in the latest quarter.
AFL 55.04, -5.28, -8.7%) was expected to make $1.01 a share, according to the average estimate of 19 analysts in a Thomson Reuters survey.