This study investigates the financial impact of mergers and acquisitions within the FinTech sector by examining the pre- and post-acquisition performance of two firms (JP Morgan Chase and Goldman Sachs) over five years. The research adopts a comparative quantitative approach to assess whether acquisitions lead to measurable improvements in financial performance focusing on Return on Assets, Return on Equity, and total net revenue. Results indicate that while Return on Equity consistently improved after acquisition, suggesting enhanced shareholder returns, Return on Assets either plateaued or declined, reflecting limited gains in asset productivity. Additionally, revenue growth was found to be short-lived, with both cases experiencing stagnation after initial post-acquisition increases. These findings suggest that financial performance improvements may be influenced more by changes in capital structure than by operational efficiency or market expansion. The study concludes that while acquisitions in the FinTech space can deliver short-term financial benefits, but long-term value creation is contingent upon strategic integration, sustained innovation, and market adaptability. The analysis contributes to existing literature by offering a grounded, data-driven perspective on the real financial implications of FinTech acquisitions, urging firms to focus beyond transactional gains toward longer-term performance sustainability.