Shares of Montrose Environmental Group (NYSE: MEG) are surging 12.49% in pre-market trading on Thursday, building on the previous day's 7.24% gain. The significant uptick comes in response to the company's impressive first-quarter 2025 financial results, the announcement of a new stock repurchase program, and increased full-year guidance.

Montrose reported quarterly revenue of $177.80 million, marking a 14.5% increase year-over-year and surpassing analyst expectations of $168.12 million. The company's adjusted earnings figures, however, showed some discrepancies in reporting. While one source indicated adjusted earnings of $0.07 per share, significantly beating the analyst consensus estimate of $(0.48), another report suggested a quarterly adjusted loss of $0.64 per share. Despite this inconsistency, the overall financial performance appears to have impressed investors.

Adding to the positive sentiment, Montrose Environmental Group announced its first-ever stock repurchase program of up to $40.0 million. This move signals confidence in the company's financial position and demonstrates a commitment to enhancing shareholder value. Furthermore, the environmental services company reaffirmed its expected full-year 2025 revenue and increased its guidance, with adjusted EBITDA now projected to be in the range of $103-110 million. The combination of strong quarterly results, the stock buyback initiative, and the optimistic outlook for the year ahead has fueled investor enthusiasm, driving the substantial pre-market stock price increase.