Welcome to our dedicated page for Costar Group SEC filings (Ticker: CSGP), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
CoStar Group filings document the regulatory record of a Delaware operating company that provides online real estate marketplaces, information, analytics, and 3D digital twin technology. Its 8-K reports commonly furnish quarterly and annual operating results, Regulation FD disclosures, investor presentation channels, and material corporate events tied to its property-market data and marketplace business.
Proxy and governance filings cover annual meeting matters, board composition, executive compensation arrangements, severance plans, and related employment agreements. Recent filings also document completed acquisition activity, capital actions, and formal disclosures connected to CoStar Group’s corporate structure and public-company governance.
CoStar Group’s General Counsel and Secretary, Gene Boxer, reported a small tax-related share disposition. On this amended Form 4, 482 shares of common stock were withheld at a price of $43.63 per share to cover tax obligations. After this non‑market, tax-withholding transaction, Boxer directly holds 95,463 shares of CoStar Group common stock. A footnote states that the reported amount reflects a correction due to an administrative error, indicating this filing primarily updates prior data rather than reflecting a new trading decision.
CoStar Group Senior VP Lisa Ruggles reported a routine tax-withholding transaction involving company stock. On March 15, 2026, 2,977 shares of common stock were disposed of at $43.63 per share to cover tax obligations tied to equity compensation. After this non-market transaction, she directly holds 174,915 shares of CoStar Group common stock.
CoStar Group, Inc. General Counsel and Secretary Gene Boxer reported a small share disposition related to tax withholding. On March 15, 2026, 428 shares of common stock were delivered at a price of $43.63 per share to satisfy a tax liability. This was reported as a tax-withholding disposition rather than an open-market sale. Following the transaction, Boxer continued to hold 95,517 shares of CoStar common stock directly.
CoStar Group Chief Technology Officer Frank Simuro reported a tax-withholding disposition of 11,107 shares of common stock. The shares were valued at $43.63 each, based on the Nasdaq closing price on March 13, 2026. After this transaction, he directly holds 414,491 shares.
CoStar Group, Inc. director Nana Banerjee filed an initial Form 3 as a reporting person for the company’s securities. The filing identifies Banerjee’s role as a director and does not report any insider transactions or derivative positions in CoStar Group stock.
CoStar Group’s Chief Human Resources Officer Michael J. Desmarais reported a tax-withholding disposition of 2,873 shares of common stock at $43.63 per share. This type F transaction reflects shares withheld to cover taxes, not an open-market sale. He now directly holds 87,725 shares.
COSTAR GROUP, INC. Chief Accounting Officer Cynthia Cammett reported a routine tax-related share disposition. On March 15, 2026, 1,194 shares of common stock were withheld at a price of $43.63 per share to cover tax obligations, rather than sold on the open market. Following this transaction, she directly holds 25,148 shares, indicating she retains the vast majority of her equity position.
CoStar Group, Inc. appointed Nana Banerjee as a new independent member of its Board of Directors, effective immediately. With his appointment, the Board expands to nine directors, eight of whom are independent. Banerjee brings more than two decades of experience leading and scaling global technology and data-driven businesses, including roles as President and CEO of Pelmorex Corp. and McGraw-Hill and senior leadership positions at Verisk, Argus, and Citibank. He has also served in key board and committee roles, including Audit Committee Chairman and Non-executive Chairman of Comscore. CoStar highlights his deep background in AI, centralized data, and advanced analytics as aligned with its long-term growth strategy and value-creation plans.
CoStar Group, Inc. reported that Chief Accounting Officer Cynthia Cammett received an award of 4,374 shares of common stock as compensation. Under the Management Stock Purchase Plan, part of her annual cash incentive was converted into Deferred Stock Units at $46.34 per unit, and she was granted an equal number of Restricted Stock Units that vest in full after four years. Following this grant, she directly holds 26,342 shares of CoStar common stock.
CoStar Group, Inc. reported that President and CEO Andrew C. Florance acquired 124,162 shares of common stock through an equity award. Under a Management Stock Purchase Plan, his annual cash incentive was converted into Deferred Stock Units at $46.34 per unit, and he received Restricted Stock Units for an equal number of shares that vest in full after four years. Following this grant, he directly holds 1,651,435.03 shares of CoStar common stock, reflecting a sizable, compensation-related increase rather than an open-market purchase.