Artisan Partners, an investment management company, released its first-quarter 2026 investor letter for the “Artisan Mid Cap Fund”. A copy of the letter is available to download here. In Q1 2026, the Artisan Mid Cap Fund reported negative absolute returns but slightly outperformed the Russell Midcap® Growth Index. The market favored lower volatility and income-oriented equities, with value outpacing growth significantly. Despite challenges for growth strategies, selective stock choices in sectors like industrials and healthcare provided strength, while consumer discretionary faced weaknesses. Mid- and small-cap indices showed resilience amid lagging large-cap growth stocks. The escalating conflict in Iran influenced market behavior, and AI-related investments continued to support capital spending and earnings. In addition, please check the Fund’s top five holdings to know its best picks in 2026.
In its first-quarter 2026 investor letter, Artisan Mid Cap Fund highlighted Comfort Systems USA, Inc. (NYSE:FIX) as a leading contributor. Comfort Systems USA, Inc. (NYSE:FIX) is a leading mechanical and electrical installation, renovation, maintenance, repair, and replacement services provider to commercial, industrial, and institutional customers. On May 8, 2026, Comfort Systems USA, Inc. (NYSE:FIX) closed at $1,952.37 per share. One-month return of Comfort Systems USA, Inc. (NYSE:FIX) was 19.94%, and its shares gained 332.07% over the past 52 weeks. Comfort Systems USA, Inc. (NYSE:FIX) has a market capitalization of $68.73 billion.
Artisan Mid Cap Fund stated the following regarding Comfort Systems USA, Inc. (NYSE:FIX) in its Q1 2026 investor letter:
“Among our top contributors in Q1 were Comfort Systems USA, Inc. (NYSE:FIX), Twist Bioscience and RBC Bearings. Comfort Systems is a provider of heating, ventilation and air conditioning services. Strong demand from data center construction, driven by hyperscaler customers, now generates a significant portion of the company’s revenue. Recent results exceeded expectations, with accelerating revenue growth supported by a strong backlog and continued expansion in modular capacity. We view the company as well positioned to benefit from sustained investment in data center infrastructure.”
Comfort Systems USA, Inc. (NYSE:FIX) is not on our list of 40 Most Popular Stocks Among Hedge Funds Heading Into 2026. According to our database, 72 hedge fund portfolios held Comfort Systems USA, Inc. (NYSE:FIX) at the end of the fourth quarter, up from 67 in the previous quarter. Comfort Systems USA, Inc.’s (NYSE:FIX) EPS reached $10.51 in the first quarter of 2026, representing more than double that of Q1 2025. While we acknowledge the risk and potential of Comfort Systems USA, Inc. (NYSE:FIX) 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 Comfort Systems USA, Inc. (NYSE:FIX) and that has 10,000% upside potential, check out our report about this cheapest AI stock.
In another article, we covered Comfort Systems USA, Inc. (NYSE:FIX) and shared the list of best engineering stocks to buy in 2026. In Q1 2026, Alger Mid Cap Fund also attributed the same reason for the Comfort Systems USA, Inc.’s (NYSE:FIX) strong performance. In addition, please check out our hedge fund investor letters Q1 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.
