As of Q4'25 (2025-12-31), VST reported an Operating Cash Flow of -2.64B USD and a Free Cash Flow of -722M USD, both showing significant declines compared to previous quarters. This marks a notable negative shift in the company's cash generation at the end of the reported period. From Q1'23 to Q3'25, both Operating and Free Cash Flow generally fluctuated within positive territory, with peaks in Q2'23 and Q3'24 for Operating Cash Flow (1.58B USD and 1.70B USD, respectively) and Free Cash Flow (1.24B USD and 1.03B USD, respectively). However, the chart reveals increased volatility in 2024 and 2025, including several quarters of negative Free Cash Flow and culminating in a sharp downturn in Q4'25. This suggests emerging cash flow challenges and potential operational or capital expenditure pressures in the most recent quarters.