Following the leadership transition on October 27, 2022, Twitter/X underwent a notable change in platform governance. This study investigates how these changes influenced information quality for registered U.S. voters and the platform more broadly. We address this question by analyzing two complementary datasets—a Twitter panel and a Decahose sample. Our findings reveal a subtle yet statistically significant decline in information quality across both datasets, stemming from an increase in content from low-quality sources and a decrease in content from high-quality sources. These results suggest that the ownership change and subsequent policy adjustments were associated with shifts in the platform’s information ecosystem. Our results underscore the broader significance of ownership and governance for information quality in dynamic sociotechnical systems, highlighting the determinantal power that platform owners may have in shaping the information ecosystem.