Comfort Systems USA (FIX) Stock: S&P 500 Inclusion, Data‑Center Boom and Insider Selling as of December 6, 2025
Comfort Systems USA, Inc. (NYSE: FIX) has gone from a niche HVAC contractor to one of 2025’s hottest industrial growth stories. The stock is up well over 100% this year, powered by record earnings, a surging data‑center backlog and aggressive capital returns – and now it’s being added to the S&P 500 index on December 22, 2025. Investors.com+2Investing News Network (INN)+2 As the share price hovers around $1,001 and the market cap tops $33 billion, investors are asking the obvious question: is FIX still a buy after this run, or has the story gotten ahead of itself? MarketBeat Where Comfort