Shares of Comfort Systems slid after the company appointed a new finance chief and reported third-quarter results that came in ahead of Wall Street expectations.

The stock was declined by 5.4% to $1,209.78 in after-hours trading on Thursday. Shares closed down 8.7% at $1,279.37, and had risen 37% this year through the close.

The provider of heating, ventilation and air conditioning services said that Chief Financial Officer Bill George will retire after the company files its 2026 annual report.

Comfort Systems appointed Chief Accounting Officer Julie Shaeff to take over as CFO once George exits.

The company also reported a third-quarter profit of $489 million, or $13.91 a share, compared with a profit of $291.6 million, or $8.25 a share, a year earlier.

Revenue rose to $3.77 billion from $2.45 billion a year prior.

Analysts polled by FactSet were expecting a profit of $12.85 a share on revenue of $3.46 billion.

Comfort Systems also raised its quarterly dividend by 10 cents to $1.00 a share, up from 90 cents.

The new payout of $4.00 a year represents a 0.3% yield based on the company's latest closing share price of $1,279.37.

The dividend is payable on Nov. 23 to shareholders of record as of Nov. 12.