---
schema_version: "secwatch.filing_event.v1"
accession: "0001057352-26-000030"
form_type: "8-K"
ticker: "CSGP"
cik: "0001057352"
company_name: "COSTAR GROUP, INC."
filed_at: "2026-04-28T23:59:59+00:00"
generated_at: "2026-05-15T02:41:20.533645+00:00"
event_type: "earnings"
sentiment: "positive"
materiality_score: 0.8
calibrated_materiality_score: 0.8
confidence: "high"
source: SEC EDGAR
---

# CoStar Group Q1 revenue $897M (+23% YoY); raises FY2026 EBITDA guidance to $780-820M

## Summary
- Revenue $897M (+23% YoY); net income $3M vs loss of $15M in Q1 2025.
- Adjusted EPS $0.23 (+53% YoY); Adjusted EBITDA $132M (+100% YoY), above guidance top end.
- Net new bookings $67M (+20% YoY); 60 consecutive quarters of double-digit revenue growth.
- Homes.com organic traffic +119% YoY; 35,000 members (+200% YoY).
- FY2026 revenue reaffirmed $3.78-3.82B; adjusted EBITDA guidance raised $30M midpt to $780-820M.

## SEC filing metadata
- accession: 0001057352-26-000030
- form_type: 8-K
- ticker: CSGP
- cik: 0001057352
- company_name: COSTAR GROUP, INC.
- filed_at: 2026-04-28T23:59:59+00:00
- event_type: earnings
- sentiment: positive
- materiality_score: 0.8
- calibrated_materiality_score: 0.8
- confidence: high
- sec_items: 2.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1057352/000105735226000030/0001057352-26-000030-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1057352/000105735226000030/form8-kq12026earningspr.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001057352-26-000030
- JSON: https://secwatch.observer/filing/0001057352-26-000030.json
- Plain text: https://secwatch.observer/filing/0001057352-26-000030.txt

## Key facts
- Earnings Releases
  COSTAR GROUP, INC. reported the quarter ended March 31, 2026 results: revenue $897 million, net income $3 million, EPS $0.01. Guidance reaffirmed.
  - Period: the quarter ended March 31, 2026
  - Revenue: $897 million
  - Net income: $3 million
  - EPS: $0.01
  - Guidance: reaffirmed
  - Result: reported results
  source text: announced today that revenue for the quarter ended March 31, 2026 was $897 million, up 23% over revenue of $732 million for the quarter ended March 31, 2025. Net income was $3 million and earnings per diluted share was $0.01 for the first quarter of 2026
  evidence_url: https://www.sec.gov/Archives/edgar/data/1057352/000105735226000030/0001057352-26-000030-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.