A Form 4 filed with the SEC on August 5, 2026, disclosed that Andrew C. Florance, Founder and CEO of CoStar Group, Inc., purchased 83,300 shares of common stock on August 4, 2026.

Key Highlights

  • Reporting person: Andrew C. Florance, identified as Founder and CEO and Director of CoStar Group, Inc.
  • Transaction: Purchase (code P) of 83,300 shares of Common Stock, par value $0.01 per share, on August 4, 2026.
  • Average price: $29.89 per share, based on individual sale prices ranging from $29.57 to $29.99, according to the filing's footnote.
  • Beneficial ownership following transaction: 1,806,165.03 shares held directly.
  • No derivative securities were reported in Table II of this filing.

Andrew Florance's Direct Purchase of CoStar Group Common Stock

According to the Form 4 filed with the SEC, Andrew C. Florance, who serves as Founder and CEO and is also listed as a Director of CoStar Group, Inc. (NASDAQ: CSGP), acquired 83,300 shares of the company's Common Stock, par value $0.01 per share, on August 4, 2026. The filing records the transaction under code "P," designating an open-market purchase. The shares are held directly by the reporting person.

The filing notes that the reported price of $29.89 per share is an average, with individual transaction prices ranging from $29.57 to $29.99. Following this purchase, according to the filing, Florance's direct beneficial ownership of CoStar Group common stock totals 1,806,165.03 shares. No transactions involving derivative securities were reported in Table II of this filing.

The Form 4 was signed by Gene Boxer as Attorney-in-Fact for Florance and was dated August 5, 2026. The filing lists Florance's address as c/o CoStar Group, Inc., 1201 Wilson Blvd., Arlington, Virginia 22209.

What Was Disclosed

The filing disclosed a direct open-market purchase of 83,300 shares of CoStar Group common stock by Founder and CEO Andrew C. Florance on August 4, 2026, at an average price of $29.89 per share, bringing his direct beneficial ownership to 1,806,165.03 shares.