Zacks Research upgraded Comfort Systems USA (NYSE: FIX) from "hold" to "strong-buy" on May 27, 2026.

The upgrade follows recent quarterly earnings that surpassed analyst expectations. Other analysts also issued upgrades and buy ratings for the company in recent months.

On the same day, regulatory filings showed that Kestra Investment Management LLC reduced its stake in the company during the fourth quarter.

New Age Alpha Advisors LLC also reduced its holdings during the fourth quarter.