CoStar Group reports Q3 2026 earnings beat but shares tumble on guidance

CoStar Group posted third‑quarter 2026 adjusted earnings per share of $0.38 and revenue of $952 million, both beating analyst estimates. The company raised its full‑year adjusted EBITDA guidance to $820‑$840 million and its revenue outlook to $3.75‑$3.77 billion, but signaled modest fourth‑quarter growth. Despite the beat, the stock fell sharply after the results were released.

The higher full‑year guidance may support the stock’s longer‑term valuation, but the immediate post‑earnings price drop reflects investor concern over the modest outlook for Q4 revenue and margins.

  • 1Adjusted EPS for Q3 2026 was $0.38, beating the consensus of $0.34.
  • 2Quarterly revenue was $952 million, up 14.2% year over year.
  • 3Adjusted EBITDA for the quarter was $229 million, exceeding the guidance range of $190‑$210 million.
  • 4Full‑year 2026 adjusted EBITDA guidance was raised to $820‑$840 million.
  • 5Full‑year 2026 adjusted EPS guidance was set at $1.38‑$1.41.
  • 6Q4 2026 revenue guidance was $976‑$996 million.
  • Post‑earnings stock decline reported as 12.5% in material 2 and 9.54% in material 3.

Sources