Company · CSGP · CIK 1057352

Costar Group, Inc. (CSGP) SEC filings and CIK.

CSGP’s SEC Central Index Key (CIK) is 0001057352, or 1057352 without leading zeros. The SEC’s ticker file lists it as COSTAR GROUP, INC..

Ticker: CSGP
CIK: 0001057352
Other tickers: None
Insider transactions, Q3 2026: 6

Insider trading

In Q3 2026, insiders at Costar Group, Inc. reported 6 non-derivative transactions on 8 Forms 3, 4 and 5, including 1 open-market purchases and 2 sales. See every CSGP insider transaction →

Recent filings we observed

No filings for this CIK appear in our current observation window. The full history is available from the filings endpoint below and on SEC.gov.

Get CSGP SEC data through the API

Filing history

curl "https://sec-api.dev/api/v1/filings?cik=1057352&limit=10" \
  -H "Authorization: Bearer $SEC_API_KEY"

Company profile

curl "https://sec-api.dev/api/v1/companies/1057352" \
  -H "Authorization: Bearer $SEC_API_KEY"

Reported XBRL facts

curl "https://sec-api.dev/api/v1/facts/1057352?taxonomy=us-gaap&concept=Revenues&limit=10" \
  -H "Authorization: Bearer $SEC_API_KEY"

Ticker to CIK API · SEC filings API · Costar Group, Inc. on SEC.gov

Questions

What is CSGP’s CIK number?

CSGP’s SEC Central Index Key (CIK) is 0001057352, or 1057352 without leading zeros. The SEC’s ticker file lists it as COSTAR GROUP, INC..

How do I find Costar Group, Inc.’s 10-K?

Request /api/v1/filings?cik=1057352&form=10-K, or open the company’s EDGAR page and filter by 10-K. Foreign issuers file 20-F or 40-F instead.

Ticker and CIK: SEC company_tickers.json, cached 2026-11-02. Tickers can move between entities; the CIK identifies the filer.

Plain-text version for agents and LLMs: /companies/csgp.md

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