Unum Group's stock experienced a significant after-hours plunge of 7.81% following the release of its fourth quarter 2025 financial results.

The workplace benefits provider reported quarterly adjusted earnings of $1.92 per share, missing analyst estimates of $2.11 by 9.09%. Revenue for the quarter came in at $3.244 billion, falling short of the $3.284 billion consensus estimate. More notably, the company's net income dropped 50.1% year-over-year to $174.1 million.

The disappointing earnings results, particularly the substantial decline in net income and the misses on both top and bottom line estimates, appear to be the primary drivers behind the stock's sharp decline in after-hours trading.