4 insiders at CoStar Group, Inc. (CSGP) reported open-market stock purchases totaling $8,484,600 in recent weeks, according to filings with the U.S. Securities and Exchange Commission. The largest reported purchase came from FLORANCE ANDREW C (director, officer: Founder and CEO), who acquired 83,300 shares at $29.89 on August 04, 2026.
Source: SEC Form 4. Option grants and tax-withholding sales are excluded.
| Date | Insider | Role | Shares | Price | Value | Source |
|---|---|---|---|---|---|---|
| 2026-08-04 | FLORANCE ANDREW C | director, officer: Founder and CEO | 83,300 | $29.89 | $2,489,837 | SEC Form 4 |
| 2026-05-01 | FLORANCE ANDREW C | director, officer: President and CEO | 3,100 | $35.82 | $111,042 | SEC Form 4 |
| 2026-05-01 | FLORANCE ANDREW C | director, officer: President and CEO | 68,330 | $35.17 | $2,403,166 | SEC Form 4 |
| 2026-03-06 | Sams Louise S | director | 1,000 | $48.36 | $48,360 | SEC Form 4 |
| 2026-03-02 | Glaser Rachel C | director | 1,000 | $44.94 | $44,940 | SEC Form 4 |
| 2026-03-02 | SAINT FREDERICK G. | officer: President, Marketplaces | 20,000 | $45.33 | $906,600 | SEC Form 4 |
| 2026-02-27 | FLORANCE ANDREW C | director, officer: President and CEO | 55,720 | $44.52 | $2,480,654 | SEC Form 4 |
CoStar Group, Inc. is a Real Estate company in the Real Estate - Services industry. It carried a market capitalization of about $12.2B, with shares trading near $30.21.
This article is automated factual reporting of public SEC filings, for informational purposes only. It is not investment advice, nor a recommendation, offer or solicitation to buy or sell any security, and reflects no opinion on the company. Figures are drawn from filings believed reliable but are not guaranteed. Always verify against the primary SEC filing and consult a licensed professional. Investing can lose value, up to total loss.