Hartford Insurance Group's stock tumbled 5.23% in after-hours trading following the release of its first-quarter financial results.

The property and casualty insurer reported core earnings of $3.09 per share for the quarter ended March 31, which missed the analyst consensus estimate of $3.40. Quarterly sales of $7.23 billion also fell short of the expected $7.35 billion. While the company's profit showed a significant year-over-year increase, the failure to meet Wall Street expectations on key metrics appears to have driven the negative investor reaction post-market.

The earnings miss was broad-based, with adjusted net income of $866 million coming in below the estimate of $956.6 million. This quarterly performance contrasts with recent quarters where the company had consistently beaten analyst estimates, potentially amplifying the market's disappointment.