---
schema_version: "secwatch.filing_event.v1"
accession: "0001057352-26-000072"
form_type: "8-K"
ticker: "CSGP"
cik: "0001057352"
company_name: "COSTAR GROUP, INC."
filed_at: "2026-08-21T20:03:36+00:00"
generated_at: "2026-08-21T20:04:05.301061+00:00"
event_type: "m_and_a"
sentiment: "positive"
materiality_score: 0.8
calibrated_materiality_score: 0.8
confidence: "high"
source: SEC EDGAR
---

# CoStar completes $800M cash acquisition of Zonda, expanding into new home data marketplaces

## Summary
- CoStar Group acquired Zonda for $800M cash; deal announced May 29, 2026 and now closed after regulatory approvals.
- Zonda serves 3,000+ customers; 2025 revenue ~$170M at 23% Adjusted EBITDA margin.
- Adds NewHomeSource.com and Livabl marketplaces; U.S. new home market ~$400B in annual sales.
- Q2 2026 revenue $925M (+18% YoY); Adjusted EBITDA doubled to $184M; residential revenue up 33% to $444M.
- Zonda CEO Jeff Meyers will stay on; CoStar sees synergies with Matterport's spatial tech.

## SEC filing metadata
- accession: 0001057352-26-000072
- form_type: 8-K
- ticker: CSGP
- cik: 0001057352
- company_name: COSTAR GROUP, INC.
- filed_at: 2026-08-21T20:03:36+00:00
- event_type: m_and_a
- sentiment: positive
- materiality_score: 0.8
- calibrated_materiality_score: 0.8
- confidence: high
- sec_items: 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1057352/000105735226000072/0001057352-26-000072-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1057352/000105735226000072/csgp-20260821.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001057352-26-000072
- JSON: https://secwatch.observer/filing/0001057352-26-000072.json
- Plain text: https://secwatch.observer/filing/0001057352-26-000072.txt

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