Finally, Nuveen LLC bought a new stake in Comfort Systems USA in the 1st quarter valued at approximately $74,634,000. Get Comfort Systems USA alerts:Analyst Upgrades and DowngradesSeveral research firms have weighed in on FIX. Comfort Systems USA Stock PerformanceShares of Comfort Systems USA stock opened at $806.24 on Friday. Comfort Systems USA Increases DividendThe firm also recently disclosed a quarterly dividend, which was paid on Monday, August 25th. Receive News & Ratings for Comfort Systems USA Daily - Enter your email address below to receive a concise daily summary of the latest news and analysts' ratings for Comfort Systems USA and related companies with MarketBeat.com's FREE daily email newsletter.