Artisan Added Comfort Systems USA (FIX) as Data Center Demand Accelerates

Artisan Partners , an investment management company, released its second-quarter 2026 investor letter for the "Artisan Mid Cap Fund". The letter can be downloaded here . Global equities rebounded sharply in Q2 2026, recovering from March lows as resilient economic data, strong corporate earnings, and continued AI investment improved investor sentiment despite inflation concerns, delayed rate cuts, and geopolitical uncertainty. The portfolio generated strong absolute returns and outperformed the Russell Midcap® Growth Index, benefiting from semiconductor exposure within IT and strong stock selection in health care and consumer discretionary. Its Investor Class: ARTMX returned 17.86%, Advisor Class: APDMX returned 17.88%, and Institutional Class: APHMX returned 17.93% vs. a 14.55% gain for the index. Healthcare was the largest contributor, with biotech holdings driving gains, while consumer holdings also performed well. Software exposure, aerospace and defense holdings, and communication services positions weighed on relative performance. The fund continues to focus on identifying high-quality growth companies with durable secular trends and attractive valuation opportunities. Please check the fund's top five holdings for its best picks in 2026.

In its second-quarter 2026 investor letter, Artisan Mid Cap Fund highlighted Comfort Systems USA, Inc. (NYSE: FIX ) as a notable 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 September 04, 2026, Comfort Systems USA, Inc. (NYSE:FIX) closed at $1,610.34 per share. Over the past month, Comfort Systems USA, Inc. (NYSE:FIX) declined 3.85% and its shares gained 124.95% over the past 52 weeks. Comfort Systems USA, Inc. (NYSE:FIX) has a market capitalization of $56.67 billion.

Artisan Mid Cap Fund stated the following regarding Comfort Systems USA, Inc. (NYSE:FIX) in its Q2 2026 investor letter:

" Comfort Systems USA, Inc. (NYSE:FIX) is a provider of heating, ventilation and air conditioning services. Strong demand from data center construction, driven by hyperscaler customers, now accounts for a majority of its revenue. Recent earnings results exceeded expectations, with year-over-year same-store revenue growth of 51% and margin expansion. It also raised full-year guidance. We view the company as well positioned to benefit from ongoing investment in data center infrastructure and added to the position during the quarter."