CoStar Group, Inc. (CSGP)

Real estate marketplaces and data, 78% U.S. Read October 19, 2026 from the annual report for the period ending December 31, 2025, filed February 26, 2026. Ranked 5 of the 15 Real Estate companies read so far, by the share within reach now.

CoStar Group’s 8,441 employees, 78% in the United States, sell and run online real estate marketplaces and the research and data business behind CoStar Suite, split by description.

The figures on this page come from the company's own annual report and from BLS staffing patterns for its industries, never from a roster. They are estimates with a stated method. Nothing here says what the company will do: within reach is not a forecast of jobs lost or of savings.

What follows from the reading

Share of working time within reach of AI, on the long-run pace at four in five: 26% now, 54% at the end of 2027, 67% at the end of 2028, 72% at the end of 2030. By the patterns, the work is about 72% desk work, 23% people work and 5% body work. These are the site's industry estimates weighted by the shares below: estimates with a stated method and range, not a forecast of what the company will do. By the same patterns, at the end of 2028 about 28% of the working time stays with people (conversation, in-person and hands-on work), 54% becomes checking a model's work and 12% could be handed over with lighter checks, from the industries' own figures, not the company's roles.

Headcount

8,441 employees as of January 31, 2026 (sum of stated parts). 6,602 of 8,441 employees are U.S.-based, about 78% by the filing; 1,155 in Asia and Oceania, 608 in Europe, 72 in Canada and 4 in Latin America.

The filing: “As of January 31, 2026, we employed: 6,602 U.S.-based employees, representing approximately 78% of the overall employee population; 1,155 employees in Asia and Oceania; 608 employees in Europe; 72 employees in Canada; 4 employees in Latin America.”

The workforce as industry patterns

What the filing says about the workforce: Over 8,000 employees in 20 countries, 8,441 by the count by region as of January 31, 2026; no U.S. employees represented by a union; works councils at the German and French subsidiaries; extensive sales training programs.

Companies read with the same leading pattern

Other companies whose largest staffing pattern is also Web Search Portals, Libraries, Archives, and Other Information Services, largest first, each read from its own annual report. Within reach now and at the end of 2028, long-run pace, four in five.

• Alphabet (GOOGL, 190,820 employees)25% now, 65% by 2028
• eBay Inc. (EBAY, 12,300 employees)25% now, 65% by 2028
• Clarivate Plc (CLVT, 12,000 employees)29% now, 64% by 2028
• Zillow Group, Inc. Class A (ZG, 7,068 employees)26% now, 65% by 2028

What the filing says about AI

53 sentences in the filing name AI. The filing names AI 53 times: Homes AI and other AI technologies in its products and the risks related to them.

• “Form 10-K Summary 57 Signatures 58 Index to Consolidated Financial Statements F- 1 2 Glossary of Terms The following abbreviations or acronyms used in this Annual Report on Form 10-K (this "Report") are defined below: Abbreviation or Acronym Definition 2020 Credit Agreement The second amended and restated credit agreement, dated July 1, 2020, which amended and restated in its entirety the then-...”
• “Domain Domain Holdings Australia Pty Limited Domain Acquisition CoStar's acquisition of Domain completed on August 27, 2025, pursuant to the Scheme Implementation Deed Domain Proposal The Company's non-binding indicative proposal to acquire 100% of the issued capital of Domain by way of scheme of arrangement for a cash consideration of A$4.43 per ordinary share of Domain Domain SID The Company'...”
• “The following important factors, in addition to those discussed or referred to under the heading "Risk Factors," and other unforeseen events or circumstances, could affect our future results and could cause those results or other outcomes to differ materially from those expressed or implied in our forward-looking statements: the risks related to AI Technologies, such as Homes AI; our inability...”
• “We also continue to leverage AI by deeply integrating it into our products and internal processes.”
• “AI is driving research efficiencies, improving data quality and increasing the pace of product development.”

Its annual reports, year by year

Sentences naming AI in each annual report, counted by one rule, beside the median report in the Index that year. Each count links its filing. Every company, by year and sector

• Fiscal 20210median 0
• Fiscal 20221median 0
• Fiscal 20233median 1
• Fiscal 202410median 4
• Fiscal 202553median 10

Headcount by filing year

As reported in each year's annual report, with the filing. A year marked not read had no figure the reading could take from the report's text.

Limits of this reading

• The collector’s 8,000 was the rounded sentence; the count by region sums to 8,441 (rule 2) and includes Domain, acquired in August 2025, so the series is not like for like.
• No count by business; the split between the marketplaces and the research and data businesses is by description.
• The segment table is fiscal 2024 and was not used.

Source: the company's annual report on EDGAR, accession 0001057352-26-000020, the filing. Read by Claude Fable 5.1 under rubric version 1, by the method. A company can write to info@stratussc.com to have its reading checked against its filing.