---
schema_version: "secwatch.filing_event.v1"
accession: "0001057352-26-000024"
form_type: "8-K"
ticker: "CSGP"
cik: "0001057352"
company_name: "COSTAR GROUP, INC."
filed_at: "2026-03-16T23:59:59+00:00"
generated_at: "2026-05-15T11:21:51.973397+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.35
calibrated_materiality_score: 0.35
confidence: "high"
source: SEC EDGAR
---

# CoStar Group appoints Nana Banerjee to board; brings AI and analytics expertise

## Summary
- Nana Banerjee appointed independent director effective March 15, 2026; board expands to nine directors, eight independent.
- Banerjee formerly CEO of Pelmorex Corp (The Weather Network), with deep AI and advanced analytics experience.
- He also served as Senior Managing Director at Cerberus Capital Management and CEO of McGraw-Hill.
- No committee assignments have been made at this time; compensation follows standard director program.

## SEC filing metadata
- accession: 0001057352-26-000024
- form_type: 8-K
- ticker: CSGP
- cik: 0001057352
- company_name: COSTAR GROUP, INC.
- filed_at: 2026-03-16T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.35
- calibrated_materiality_score: 0.35
- confidence: high
- sec_items: 5.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1057352/000105735226000024/0001057352-26-000024-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1057352/000105735226000024/csgp-20260315.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001057352-26-000024
- JSON: https://secwatch.observer/filing/0001057352-26-000024.json
- Plain text: https://secwatch.observer/filing/0001057352-26-000024.txt

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