The Diamond Hill Small-Mid Cap Fund concluded the second quarter of 2026 with a notable increase, albeit trailing the broader market index. This report summarizes the fund's activities and performance during this period, detailing significant investment decisions and the factors influencing its returns.

Detailed Investment Performance and Strategic Adjustments

In the second quarter of 2026, the Diamond Hill Small-Mid Cap Fund recorded a 9.71% growth, which was less than the 20.26% surge observed in the Russell 2500 Index. This disparity highlights a period of mixed fortunes for the fund amidst a robust market. A crucial new investment for the fund was the managed care provider, Centene (CNC), reflecting a strategic move to capitalize on opportunities within the healthcare sector.

Conversely, the fund divested its holdings in Wix.com, a company specializing in website design software. This decision stemmed from concerns over the company's decelerating core business expansion, primarily attributed to the rise of AI-driven 'vibe coding' technologies, which are reshaping the web development landscape. This strategic pivot underscores the fund's adaptive approach to portfolio management, reacting to evolving technological trends and their impact on market sectors.

Reflections on Market Dynamics and Future Outlook

The latest performance of the Diamond Hill Small-Mid Cap Fund offers valuable insights into the dynamic nature of the market and the importance of agile investment strategies. The substantial growth of the Russell 2500 Index suggests a generally positive economic climate for small and mid-cap enterprises. However, the fund's underperformance relative to this benchmark indicates that specific sector exposures and individual stock selections played a significant role in its quarterly returns.

The decision to invest in Centene showcases a belief in the resilience and growth potential of the healthcare services industry, particularly in managed care. This move could be seen as a defensive strategy or an opportunistic play on demographic shifts and policy changes impacting healthcare. Conversely, exiting Wix.com demonstrates a proactive response to technological disruption. The rapid advancement of AI is clearly transforming various industries, and investment funds must continually assess how these changes affect the competitive advantages and growth trajectories of their portfolio companies. This quarter's activity emphasizes the continuous need for careful analysis and timely adjustments to navigate an increasingly complex market environment.