---
schema_version: "secwatch.filing_event.v1"
accession: "0001057352-25-000102"
form_type: "8-K"
ticker: "CSGP"
cik: "0001057352"
company_name: "COSTAR GROUP, INC."
filed_at: "2025-08-27T23:59:59+00:00"
generated_at: "2026-05-17T09:37:05.021815+00:00"
event_type: "m_and_a"
sentiment: "positive"
materiality_score: 0.8
calibrated_materiality_score: 0.8
confidence: "high"
source: SEC EDGAR
---

# CoStar Group completes acquisition of Domain Holdings Australia for $4.43 AUD per share

## Summary
- CoStar now owns 100% of Domain after acquiring remaining ~83% at $4.43 AUD/share (net of $0.088 AUD special dividend).
- Domain reaches 7M Australians monthly; CoStar plans to apply Homes.com playbook to boost competition and lower costs.
- Acquisition expands CoStar's international presence and challenges dominant Australian property marketplace.
- CEO Florance commits to invest in content, tools, traffic, and user experience while reducing agent costs.

## SEC filing metadata
- accession: 0001057352-25-000102
- form_type: 8-K
- ticker: CSGP
- cik: 0001057352
- company_name: COSTAR GROUP, INC.
- filed_at: 2025-08-27T23:59:59+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/1057352/000105735225000102/0001057352-25-000102-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1057352/000105735225000102/csgp-20250827.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001057352-25-000102
- JSON: https://secwatch.observer/filing/0001057352-25-000102.json
- Plain text: https://secwatch.observer/filing/0001057352-25-000102.txt

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