This study investigates the financial impact of FinTech acquisitions by examining the behavior of three key financial ratios: financial leverage, liquidity, and cost-to-income. Using data from two acquiring firms (JP Morgan Chase and Goldman Sachs) over six years, three years before and three years after acquisition, the research evaluates how these indicators evolve in response to acquisition-driven structural and operational changes. The results reveal that acquisitions often lead to a temporary increase in financial leverage, driven by debt-financed transactions, followed by deliberate deleveraging efforts. Liquidity ratios decline in the immediate post-acquisition period due to integration costs and working capital adjustments but recover gradually as firms adapt financially and operationally. Cost-to-income ratios rise significantly after acquisition, reflecting transitional inefficiencies and added operational burdens, although moderate improvements are observed by the third year. These patterns underscore the importance of multidimensional financial analysis in acquisition evaluation. The findings suggest that firms can maintain financial health and regain operational control within a medium-term window if post-acquisition financial management is disciplined and adaptive. This study contributes to existing literature by providing empirical insights into acquisition outcomes in the FinTech sector using ratio-based analysis as a conceptual and diagnostic framework.