CoStar Group Beats Q1 Estimates as Adjusted EBITDA Doubles to $132M
CoStar Group (NASDAQ: CSGP) delivered stronger-than-expected first quarter 2026 results, with Adjusted EBITDA doubling year-over-year to $132 million, beating the company's guidance midpoint by 26%. The real estate information and marketplace operator reported adjusted earnings per share of $0.23, up 53% from $0.15 in the prior year period.
Key Numbers
CoStar's first quarter revenue reached $897 million, growing 23% year-over-year from $732 million, marking the company's 60th consecutive quarter of double-digit revenue growth. The revenue figure came in slightly above the midpoint of management's guidance range of $890-900 million.
The standout metric was Adjusted EBITDA, which surged 100% to $132 million from $66 million a year ago, significantly exceeding the high end of the company's $95-115 million guidance range. This dramatic margin expansion demonstrates the company's operating leverage as it scales its residential real estate investments.
On a GAAP basis, CoStar reported net income of $3 million, or $0.01 per diluted share, compared to a net loss of $15 million, or negative $0.04 per share, in Q1 2025. Adjusted Net Income climbed 49% to $94 million.
Net new bookings, a key growth metric for the subscription-based business, reached $67 million annualized, up 20% year-over-year. This acceleration in bookings growth signals continued strong demand for CoStar's commercial and residential real estate platforms.
Revenue by segment showed balanced growth across both major divisions. Commercial Real Estate revenue increased to $472 million from $409 million, while Residential Real Estate revenue jumped 31% to $425 million from $323 million in the prior year.
What Management Said
CEO Andy Florance emphasized the company's consistent execution track record, stating, "We have delivered 60 consecutive quarters of consistent, double-digit revenue growth in a wide range of economic conditions." This remarkable streak spans 15 years and multiple economic cycles, underscoring the resilience of CoStar's business model.
Florance highlighted the success of the company's AI initiatives, particularly the February launch of the Homes.com AI application, which contributed to a 119% increase in organic traffic year-over-year. He noted that customer engagement metrics reached all-time highs, with the best-ever time on site, page views, and bounce rates for the platform.
The company's strategic focus on AI-powered features extends beyond Homes.com. Florance mentioned the introduction of Smart Search on Apartments.com, describing it as "the first AI-powered voice search in multifamily marketplaces." This positions CoStar at the forefront of technology adoption in real estate information services.
CFO Christian Lown struck a confident tone about the company's financial trajectory, noting they "exceeded the midpoint of our revenue guidance and exceeded the top-end of our Adjusted EBITDA guidance." His comments suggest management's confidence in their ability to deliver on promises to investors.
Importantly, Florance reaffirmed the company's commitment to "significant Adjusted EBITDA expansion in 2026 and beyond," signaling that the dramatic margin improvement seen in Q1 represents just the beginning of a multi-year profitability inflection.
What to Watch
CoStar raised its full-year 2026 Adjusted EBITDA guidance by $30 million at the midpoint to a range of $780-820 million, representing approximately 85% year-over-year growth at the midpoint. This substantial guidance raise after just one quarter suggests management sees accelerating momentum in the business.
For Q2 2026, the company expects revenue of $922-932 million (19% growth at midpoint) and Adjusted EBITDA of $160-180 million. The sequential improvement in Adjusted EBITDA from Q1's $132 million to Q2's $170 million midpoint implies continued margin expansion throughout 2026.
The company maintained its full-year revenue guidance of $3.78-3.82 billion, representing 17% growth, despite the strong Q1 performance. This conservative approach to revenue guidance, combined with the aggressive EBITDA raise, suggests management expects further operating leverage gains rather than revenue acceleration.
A critical metric to monitor is the momentum in Homes.com membership, which reached 35,000 members in Q1, up more than 200% year-over-year. The platform's ability to continue capturing market share from established players like Zillow and Realtor.com will be essential for justifying CoStar's significant residential real estate investments.
The company's cash position remains robust at $1.2 billion, though down from $1.6 billion at year-end due to $505 million in share repurchases. With $994 million in long-term debt, CoStar maintains a net cash position that provides flexibility for continued investments in growth initiatives.
Investors should closely watch the company's ability to sustain its net new bookings growth rate of 20%, as any deceleration could signal market saturation in its core commercial real estate business. Additionally, the progression of Adjusted EBITDA margins through 2026 will validate whether the company's heavy investments in residential real estate are generating the expected returns.
The raised Adjusted EPS guidance of $1.32-1.39 for full-year 2026, up from the prior implied range, suggests management expects the profitability inflection to accelerate. With the stock likely trading at a premium valuation given the growth profile, CoStar will need to continue delivering on both its growth and margin expansion promises to maintain investor confidence.