Hartford Insurance Group's stock tumbled 5.43% in post-market trading on Thursday, as the property and casualty insurer reported first-quarter financial results that fell short of Wall Street expectations.

The company reported core earnings per share of $3.09 for the quarter, which missed the analyst consensus estimate of $3.40. Quarterly revenue of $7.23 billion also came in below the expected $7.35 billion. While the results showed significant year-over-year growth, the failure to meet key analyst estimates appears to have driven the negative investor reaction.

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 expectations, potentially amplifying the market's disappointment.