Diamond Hill Capital, a First Eagle Investment Management company, issued its Q2 2026 investor letter for its “Mid Cap Strategy”. A copy of the Q2 2026 investor letter can be downloaded here. In the quarter, equity markets posted strong returns as resilient economic growth and robust corporate earnings supported investor sentiment, although AI-related companies continued to dominate market leadership. Technology was the strongest-performing sector, while industrials also advanced and energy lagged as oil prices declined. The Fund returned 7.92% and the Russell Midcap Index returned 13.83%. Health care holdings were the largest positive contributor, supported by strength across managed care, diagnostics, and life sciences. However, stock selection and an underweight position in information technology remained the main relative headwinds. The strategy maintained limited exposure to highly valued semiconductor and memory companies, reflecting concerns that current valuations assume an extended period of elevated AI spending. It also continued to assess software and services businesses individually based on how AI may affect their long-term competitive positions. Management emphasized higher-quality companies, attractive valuations, capital preservation, and durable long-term compounding while remaining cautious about elevated valuations, concentrated leadership, and the sustainability of the current AI investment cycle. Please review the Strategy’s top five holdings for its key selections.
In its Q2 2026 investor letter, Diamond Hill Capital Mid Cap Strategy highlighted Regal Rexnord Corporation (NYSE:RRX) as a notable contributor. Regal Rexnord Corporation (NYSE:RRX) is a leading industrial company that offers sustainable power solutions, transmission, and control motion products. On August 4, 2026, Regal Rexnord Corporation (NYSE:RRX) closed at $220.04 per share, reflecting a market capitalization of $12.59 billion. Regal Rexnord Corporation (NYSE:RRX) posted a one-month return of -10.87%, while its shares gained 27.56% over the past 52 weeks.
Diamond Hill Capital Mid Cap Strategy stated the following regarding Regal Rexnord Corporation (NYSE:RRX) in its Q2 2026 investor letter:
“Shares of electrical product manufacturer Regal Rexnord Corporation (NYSE:RRX) rose in 2Q26 after reporting solid results on strong data center demand. Merger synergies and operational improvement initiatives drove better-than-expected organic growth and margin expansion, and we believe the market has yet to fully reflect the benefits of these efforts.”

Regal Rexnord Corporation (NYSE:RRX) is not on our list of 40 Most Popular Stocks Among Hedge Funds Heading Into 2026. According to our database, 51 hedge fund portfolios held Regal Rexnord Corporation (NYSE:RRX) at the end of the first quarter, up from 40 in the previous quarter. Regal Rexnord Corporation (NYSE:RRX) Q1 2026 sales increased 4.3% and 1.6% on an organic basis compared to Q1 2025. While we acknowledge the risk and potential of Regal Rexnord Corporation (NYSE:RRX) as an investment, our conviction lies in the belief that some AI stocks hold greater promise for delivering higher returns and doing so within a shorter time frame. If you are looking for an AI stock that is more promising than Regal Rexnord Corporation (NYSE:RRX) and that has 10,000% upside potential, check out our report about this cheapest AI stock.
In another article, we covered Regal Rexnord Corporation (NYSE:RRX) and shared a list of best industrial automation stocks to buy. In addition, please check out our hedge fund investor letters Q2 2026 page for more investor letters from hedge funds and other leading investors.
READ NEXT: 33 Stocks That Should Double in 3 Years and 15 Stocks That Will Make You Rich in 10 Years.
Disclosure: None. This article is originally published at Insider Monkey.






