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How Many Employees Does CoStar Group Have?
CoStar Group (CSGP) has 12,662 employees according to LinkedIn, up 8.0% over the past three months. Headcount growth at this pace signals active expansion — hiring to scale operations, R&D, or go-to-market. The LinkedIn count includes everyone who lists CoStar Group as their current employer, so it reflects workforce changes sooner than the 6,152 reported in CoStar Group’s most recent official filing.
With 12,662 employees, CoStar Group employs more people than AvalonBay Communities (2,079) but fewer than Equinix (14,753).
Is CoStar Group Growing or Shrinking?
Employee count is one of the most reliable leading indicators in alternative data: companies tend to hire before they grow and cut before they report weakness. CoStar Group currently has 219 active job postings. AltIndex feeds CoStar Group’s headcount into the CSGP AI Score alongside job postings, employee business outlook, and 20+ other signals.
For more on CoStar Group’s workforce, see its job postings, employee business outlook, and employee ratings. For a demand-side read, see CoStar Group web traffic.
Month over Month
| Sep 2026 | 11,758 | |
| Aug 2026 | 11,768 | |
| Jul 2026 | 11,724 | |
| Jun 2026 | 11,714 | |
| May 2026 | 11,737 | |
| Apr 2026 | 11,786 |
CoStar Group Employees & Headcount: Frequently Asked Questions
CoStar Group has 12,662 employees according to LinkedIn, compared with 6,152 reported in its most recent official filings. The LinkedIn figure counts everyone who lists CoStar Group as their current employer, so it reflects workforce changes sooner than annual filings.
CoStar Group’s headcount has grown 8.0% over three months, and it has 219 active job postings, indicating active hiring. View the headcount trend chart above for the full history.
Headcount is a leading indicator: companies typically hire before revenue accelerates and reduce staff before earnings disappoint. No single data point predicts a stock on its own, which is why AltIndex combines CoStar Group’s headcount with job postings, employee business outlook, and 20+ other signals in its AI Score.
CoStar Group underperforms its industry peers when it comes to Linkedin Employees, ranking in the 16th percentile.
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