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.
The CoStar Group, Inc. (NASDAQ: CSGP) SEC filings page on Stock Titan provides access to the company’s regulatory disclosures as filed with the U.S. Securities and Exchange Commission. CoStar Group is a public company that describes itself as a global leader in commercial real estate information, analytics, online marketplaces, and 3D digital twin technology, and its filings offer detail on financial performance, governance, acquisitions, and capital allocation.
Among the documents available are Form 8-K current reports, which CoStar Group uses to announce material events. The provided examples include 8-K filings reporting quarterly financial and operating results, the completion of the acquisition of Domain Holdings Australia Limited, and stockholder actions at the annual meeting such as the approval of the CoStar Group, Inc. 2025 Stock Incentive Plan and advisory votes on executive compensation. These filings also describe the company’s intent to use its corporate website as a channel for distributing material information.
In addition to 8-Ks, investors typically review CoStar Group’s annual reports on Form 10-K, quarterly reports on Form 10-Q, and proxy statements for insight into its subscription-based business model, brand portfolio, risk factors, and governance practices. Forms related to equity compensation plans and stockholder votes, such as the 2025 Stock Incentive Plan, are also reflected in the company’s filings.
Stock Titan’s platform pairs these CoStar Group filings with AI-powered tools that summarize key points and help explain technical sections, such as non-GAAP reconciliations, definitions of metrics like Adjusted EBITDA, and descriptions of compensation or incentive plans. Users can quickly see what each filing covers and then drill into the full SEC document for more detail, supporting research into CSGP’s financial condition, corporate actions, and regulatory history.
CoStar Group director Christine M. McCarthy filed an amended initial ownership report to correct her disclosed holdings. The amendment shows she directly holds 350 shares of Common Stock, par value $0.01 per share. A footnote explains these shares were omitted from her original Form 3 and from one subsequent Form 4.
The Vanguard Group filed Amendment No. 13 to a Schedule 13G/A reporting its beneficial ownership in CoStar Group Inc. The filing states 0% ownership and an as of alignment change: certain Vanguard subsidiaries will report disaggregated holdings following an internal realignment effective January 12, 2026. The filing is signed by the Head of Global Fund Administration on 03/26/2026.
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.