---
schema_version: "secwatch.filing_event.v1"
accession: "0001057352-25-000069"
form_type: "8-K"
ticker: "CSGP"
cik: "0001057352"
company_name: "COSTAR GROUP, INC."
filed_at: "2025-05-09T23:59:59+00:00"
generated_at: "2026-05-22T01:15:21.515586+00:00"
event_type: "m_and_a"
sentiment: "positive"
materiality_score: 0.85
calibrated_materiality_score: 0.85
confidence: "high"
source: SEC EDGAR
---

# CoStar Group enters binding agreement to acquire Domain Holdings for A$4.43/share (~$1.5B)

## Summary
- CoStar (CSGP) to acquire remaining ~83% of Domain (ASX:DHG) for A$4.43/share cash, total ~A$2.3B ($1.5B).
- Already owns ~17% from earlier A$4.20 purchase; implied enterprise value ~A$3.0B.
- Domain Board unanimously recommends; Nine Entertainment (60.1% stake) intends to vote in favor.
- Closing conditions: >75% shareholder vote, court, FIRB, expert opinion, no MAC; expected Q3 2025.
- Break fees of ~A$28M each side; customary no-shop, matching and exclusivity provisions.

## SEC filing metadata
- accession: 0001057352-25-000069
- form_type: 8-K
- ticker: CSGP
- cik: 0001057352
- company_name: COSTAR GROUP, INC.
- filed_at: 2025-05-09T23:59:59+00:00
- event_type: m_and_a
- sentiment: positive
- materiality_score: 0.85
- calibrated_materiality_score: 0.85
- confidence: high
- sec_items: 1.01, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1057352/000105735225000069/0001057352-25-000069-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1057352/000105735225000069/csgp-20250509.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001057352-25-000069
- JSON: https://secwatch.observer/filing/0001057352-25-000069.json
- Plain text: https://secwatch.observer/filing/0001057352-25-000069.txt

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