Diamond Hill Capital, an investment management company, released its “Mid Strategy” fourth-quarter 2025 investor letter. A copy of the letter can be downloaded here. The fourth quarter posted another period of favorable gains for equity markets, with small and large cap positions being stronger performers, returning 2.19% and 2.41%. While the mid-cap range was a relative laggard, with the Russell Mid Cap Index returning 0.16%. The Strategy returned 3.65% (net) in Q4, compared to 0.16% return for the Russell Midcap Index. YTD, the strategy returned 13.47%, outperforming the 10.60% return for the Index. In 2025, AI-related spending remained a key driver in equity markets, though December saw a pause as investors became more cautious about AI developments and potential market bubbles. Given the elevated equity market valuations, the Strategy is well-positioned to withstand ongoing uncertainty. Please review the Strategy’s top five holdings to gain insights into their key selections for 2025.
In its fourth-quarter 2025 investor letter, Diamond Hill Mid Strategy identified Post Holdings, Inc. (NYSE:POST) as its leading detractor. Post Holdings, Inc. (NYSE:POST) is a packaged consumer food company that manufactures and markets branded and private-label ready-to-eat (RTE) cereals. On March 19, 2026, Post Holdings, Inc. (NYSE:POST) stock closed at $97.41 per share. One-month return of Post Holdings, Inc. (NYSE:POST) was -8.75%, and its shares lost 12.66% over the past 52 weeks. Post Holdings, Inc. (NYSE:POST) has a market capitalization of $3.101 billion.
Diamond Hill Mid Strategy stated the following regarding Post Holdings, Inc. (NYSE:POST) in its fourth quarter 2025 investor letter:
“Packaged food company Post Holdings, Inc. (NYSE:POST) faced pressure in Q4 as a tough food staples environment and weaker consumer sentiment hurt volumes. Higher price sensitivity and heavy promotional activity also limited margin growth.”
Post Holdings, Inc. (NYSE:POST) is not on our list of 40 Most Popular Stocks Among Hedge Funds Heading Into 2026. According to our database, 57 hedge fund portfolios held Post Holdings, Inc. (NYSE:POST) at the end of the fourth quarter, up from 56 in the previous quarter. While we acknowledge the risk and potential of Post Holdings, Inc. (NYSE:POST) 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 Post Holdings, Inc. (NYSE:POST) and that has 10,000% upside potential, check out our report about this cheapest AI stock.
In another article, we covered Post Holdings, Inc. (NYSE:POST) and shared a bullish thesis on the company. In addition, please check out our hedge fund investor letters Q4 2025 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.
