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 reported that stockholders approved all proposals at the 2026 Annual Meeting, including the new 2026 Employee Stock Purchase Plan authorizing 2,500,000 shares of common stock. The plan replaces the prior 2021 ESPP and became effective upon stockholder approval.
All eight director nominees were elected with strong support, with most receiving more than 93% of votes cast, and Ernst & Young LLP was ratified as independent auditor for the 2026 fiscal year. Stockholders also approved the advisory say-on-pay proposal, following the Board’s outreach to top investors and a redesign of the 2026 executive compensation program to emphasize more rigorous, quantitative goals and clearer alignment with long-term stockholder value.
Glaser Rachel C reported acquisition or exercise transactions in this Form 4 filing.
CoStar Group director Rachel C. Glaser reported receiving a restricted stock award of 8,262 shares of common stock as compensation. The shares were granted at no cash cost on June 23, 2026 and increase her direct holdings to 12,419 shares after the award.
The restricted stock will vest in full on the earlier of the first anniversary of the grant date or the date of CoStar Group's 2027 Annual Meeting of Stockholders. This is a routine equity compensation grant and not an open-market purchase or sale.
CoStar Group director John L. Berisford received a restricted stock award of 8,262 shares of common stock. The grant was made at no cash cost per share and is classified as a compensation-related acquisition. After this award, he directly holds 11,235 CoStar Group shares.
The restricted stock vests in full on the earlier of the first anniversary of the grant date or the date of CoStar Group’s 2027 Annual Meeting of Stockholders, tying the award to both time-based service and the company’s future shareholder meeting.
Hill John W reported acquisition or exercise transactions in this Form 4 filing.
CoStar Group director John W. Hill received a grant of 8,262 shares of common stock as an equity award. The award was granted at no cash cost per share and is structured as restricted stock. Following this grant, Hill directly holds 26,493 shares.
The restricted stock award will vest in full on the earlier of the first anniversary of the grant date or the date of CoStar Group’s 2027 Annual Meeting of Stockholders. This is a compensation-related equity grant, not an open-market stock purchase or sale.
Brunner Angelique G. reported acquisition or exercise transactions in this Form 4 filing.
CoStar Group director Angelique G. Brunner received an equity grant of 8,262 shares of restricted common stock on June 23, 2026. The award carries no purchase price and represents stock-based compensation rather than an open-market transaction. The restricted shares vest in full on the earlier of the first anniversary of the grant date or the company’s 2027 Annual Meeting of Stockholders. Following this grant, Brunner directly holds 18,428 shares of CoStar Group common stock.
Musslewhite Robert W reported acquisition or exercise transactions in this Form 4 filing.
COSTAR GROUP, INC. director Robert W. Musslewhite received an equity grant of 8,262 shares of common stock as a restricted stock award. The award was granted at no cash cost to him and increases his direct holdings to 26,539 shares. According to the terms, the restricted stock vests in full on the earlier of the first anniversary of the grant date or the date of the company’s 2027 Annual Meeting of Stockholders, tying his compensation more closely to the company’s future performance and continued board service.
Sams Louise S reported acquisition or exercise transactions in this Form 4 filing.
CoStar Group director Louise S. Sams received a grant of 8,262 shares of restricted common stock at no purchase price. The award vests in full on the earlier of the first anniversary of the grant date or the company’s 2027 annual meeting of stockholders. After this grant, she directly holds 28,671 shares.
McCarthy Christine M reported acquisition or exercise transactions in this Form 4 filing.
COSTAR GROUP, INC. director Christine M. McCarthy received a grant of 8,262 shares of common stock as a restricted stock award. The award vests in full on the earlier of the first anniversary of the grant date or the Company’s 2027 Annual Meeting of Stockholders. After this grant and the inclusion of shares that were inadvertently omitted from a prior filing, she directly holds 11,585 shares.
CoStar Group’s Chief Accounting Officer Cynthia Cammett reported a routine tax-withholding transaction. On June 15, 2026, 461 shares of common stock were disposed of at $32.04 per share to cover tax obligations. After this non-market event, she directly holds 24,687 shares.
CoStar Group plans to expand further into new home real estate by acquiring Zonda, a leading new home construction data and marketplace business, for $800 million in cash. Zonda serves more than 3,000 homebuilding ecosystem customers and generates mostly subscription revenue with 104% net customer retention, indicating strong stickiness.
The deal is expected to close in the second half of 2026, subject to Hart-Scott-Rodino and other regulatory clearances and customary conditions, including no material adverse effect at Zonda. CoStar expects the acquisition to be accretive to adjusted EPS in the first full year of ownership and to create cross-sell opportunities across its commercial, residential, multifamily, lending, and analytics businesses.