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AI brief of an SEC Form 8-K · CoStar (CSGP)

CoStar Group Q1 revenue rises 23% to $897 million; raises Adjusted EBITDA guidance

Positive Impact 4 of 5 earnings Written later

CoStar Group reported first-quarter 2026 revenue of $897 million, up 23% from $732 million a year earlier, and net income of $3 million, or $0.01 per diluted share, compared with a net loss of $15 million in the prior-year quarter. The company raised its full-year 2026 Adjusted EBITDA guidance to $780 million to $820 million, an increase of $30 million at the midpoint, while reaffirming full-year revenue guidance of $3.78 billion to $3.82 billion.

Key points

  • Q1 2026 revenue was $897 million, up 23% from $732 million; net income was $3 million, or $0.01 per diluted share, versus a $15 million net loss a year earlier.
  • Q1 2026 Adjusted EBITDA was $132 million, up 100% from $66 million; Adjusted EPS was $0.23, up from $0.15.
  • Full-year 2026 Adjusted EBITDA guidance was raised to $780 million to $820 million; full-year Adjusted EPS guidance is $1.32 to $1.39.
  • Second-quarter 2026 revenue is expected at $922 million to $932 million, and Adjusted EBITDA at $160 million to $180 million. Repurchases of stock totaled $505 million in the first quarter.

The filing

CompanyCoStar (CSGP)
Form8-K, current report
Filed with the SECApr 28, 2026, 4:05 PM ET
Accession number0001057352-26-000030

Items reported: 2.02 Results of Operations7.01 Regulation FD Disclosure

Read the filing on SEC.gov ↗

Written by AI (Anthropic Claude, claude-haiku-5-5) on Nov 8, 2026, 1:12 AM ET, from the text of the filing and its press-release exhibits only. Written later: this filing was briefed after the fact, when past filings were added to the site, so the brief may be read with hindsight; the filing itself is the record of what was known on April 28, 2026.

Briefs are written by AI from the filing text (each brief's own page names the model) and can contain mistakes — open the filing before acting on anything. Impact (1-5) and tone are the model's reading of the filing for shareholders, not a price forecast. Not investment advice.