Key Stats for CoStar Stock
- 52-Week Range: $31 to $97
- Current Price: $33
- Street Mean Target: $49
- Street High Target: $50
- Analyst Consensus: 10 Buys, 4 Outperforms, 4 Holds, 1 Sell
- TIKR Model Target (Dec. 2030): $72
What Happened?
CoStar Group (CSGP), the dominant provider of commercial real estate data and analytics, reported Q1 2026 revenue of $897 million, up 22.5% year over year, while trading near $32.68 — a price last seen in January 2019.
Q1 2026 revenue came in at $897 million, up 22.5% year over year, with adjusted EBITDA of $132 million doubling from the prior-year period and landing 26% above the midpoint of the company’s own forecast, driven primarily by AI-led personnel cost savings that management said are now a structural, not a one-time, efficiency.
The headline beat was offset by a guidance miss that rattled investors: CoStar guided Q2 2026 revenue to $922 million to $932 million, a midpoint below analyst consensus of $931 million, sending shares down more than 5% on the print and prompting J.P. Morgan to cut its price target to $70 from $82, citing continued uncertainty in commercial real estate transaction volumes.
Homes.com, the residential marketplace CoStar is building as a direct competitor to Zillow and Realtor.com, is the pivot the entire bull thesis rests on: the platform grew revenue 58% year over year to $26 million in Q1, its March annual revenue run rate reached $106 million, and the February launch of Homes AI, a conversational property search tool, drove a 119% surge in organic traffic with AI users spending roughly 4x longer on site than conventional searchers.
The agent economics behind the platform are now quantifiable, and they matter for pricing power: CoStar analyzed the first 11,400 Homes.com subscribers and found they earned an average of $36,400 more in commissions in their first year of membership against an average subscription cost of $3,400, an 11x return that gave management enough conviction to raise prices for new subscribers starting May 1.
The Residential segment as a whole, covering Homes.com, Apartments.com (the multifamily marketplace with 15 consecutive quarters of double-digit revenue growth), OnTheMarket (CoStar’s U.K. portal, which just eclipsed Zoopla as the country’s second-largest by inventory), and Domain Australia, generated $425 million of revenue in Q1, up 32% year over year, with management guiding the segment to reach adjusted EBITDA breakeven in Q2, a milestone that would remove a $29 million quarterly drag from the consolidated P&L.
On the activist front, billionaire Daniel Loeb’s Third Point hedge fund, which had signaled plans to nominate new directors and force a restructuring of Homes.com investment, disclosed in April that it had sold its entire CSGP stake, writing to investors that “we no longer believe that our original thesis holds true today,” effectively removing the proxy overhang that had weighed on Homes.com sales and partnerships for months.
CEO Andy Florance stated on the Q1 2026 earnings call that “I’ve never been more confident in our plan to deliver double-digit revenue growth and significant earnings expansion through 2030 and beyond,” backed by raised full-year adjusted EBITDA guidance of $780 million to $820 million, a $1.5 billion share repurchase program with $505 million already deployed in Q1, and one additional headwind: Nasdaq’s announcement that CSGP will be removed from the Nasdaq-100 index effective May 18, replaced by Lumentum Holdings, pulling passive fund support at the worst possible moment.
Wall Street’s Take on CSGP Stock
CoStar Group stock’s historic selloff has created a spread between operational momentum and market price that hasn’t existed since the company was a fraction of its current scale, and the question for investors is whether the Q2 guidance miss was a signal or a stumble.
CSGP’s EBITDA doubled year over year to $132 million in Q1 2026, and consensus projects continued acceleration: EBITDA expected at around $170 million in Q2 2026 and around $280 million by Q4 2026, with EBITDA margins expanding from 14.7% to around 28% over the next three quarters, driven by the Homes.com investment turning EBITDA-positive in Q2.
Ten analysts rate CoStar Group stock a buy or strong buy, four rate it outperform, four hold, and one sells, with a mean price target of $49.32, implying around 51% upside from the current $32.68 close; the Street is waiting for the Residential segment to flip to sustained profitability, which management guided will occur in Q2 2026.
The target spread from $33 to $70 captures the entire debate: bears see a Homes.com investment that has drained operating income for years without proving a path to scale, while bulls see a residential platform with a $106 million annualized revenue run rate, 35,175 agent subscribers, and an 11x subscriber ROI that sets up meaningful pricing power.
At 22.32x NTM normalized earnings versus a historical mean of 75.89x, CoStar Group stock appears deeply undervalued: the market is applying a 70% discount to a business that just doubled adjusted EBITDA year over year and raised its full-year earnings guidance while sustaining 22% revenue growth.
The signal that reframes the narrative: subscribers who have been on the platform at least five years carry a 95% renewal rate, providing the recurring revenue floor that Homes.com’s incremental investment sits on top of, not beneath.
If commercial real estate transaction volumes do not recover and subscription net new bookings fail to reaccelerate in the second half of 2026, the EBITDA expansion path narrows materially.
Q2 2026 results in late July are the next test: watch whether Residential EBITDA turns positive as guided and whether net new bookings reverse three consecutive quarters of sequential decline.
From $51 Million in Operating Losses to Breakeven: What CoStar’s Income Statement Reveals
CoStar Group’s operating income swung to $3 million in Q1 2026 from a $25 million loss a year earlier, a 112% year-over-year improvement that arrived despite no let-up in Homes.com spending, driven instead by AI-led personnel cost savings that CFO Chris Lown called the primary driver of the EBITDA beat.
Revenue for the quarter reached $897 million at a 22.5% year-over-year growth rate, with SG&A expenses rising to $549 million but holding as a shrinking proportion of a rapidly expanding revenue base, reflecting the operational leverage beginning to emerge as the sales force matures past its first year of tenure.
The operating margin trajectory tells the longer story: CSGP swung from a -6.1% operating margin in Q3 2025 to 5.5% in Q4 2025 to 0.3% in Q1 2026, a volatile path but one trending toward sustained profitability as the Residential segment nears its own breakeven.
Gross margins compressed slightly to 78.1% in Q1 2026 from 79.1% a year ago, a tension worth flagging: even as revenue accelerates, cost of goods sold rose to $196 million, and any further compression in gross margins would slow the path to the $800 million EBITDA midpoint the company reaffirmed.
What Does the Valuation Model Say?
TIKR’s mid-case model prices CSGP at around $72 per share on a 13% revenue CAGR through 2030, assuming net income margins expand to 18% as Homes.com’s $550 million annual net investment phases down, with a 20% EPS CAGR and an IRR of around 16%, inputs management explicitly reaffirmed on the Q1 call.
Trading at 22x forward earnings against a 75.89x historical mean, with a mid-case price target of around $72 and a December 2034 forecast of around $120 on a 267% total return scenario, CoStar Group stock appears deeply undervalued for investors who believe the Homes.com investment thesis is intact and the EBITDA expansion path holds.
The entire argument hinges on one question: whether Homes.com’s 35,000-agent subscriber base and 119% organic traffic growth translate into a self-sustaining revenue flywheel before the market loses patience with operating income drag.
What Has to Go Right
- Residential EBITDA turns positive in Q2 2026 as guided, eliminating the segment’s -$29 million quarterly drag
- Homes.com subscriber ARPU rises materially after the May 1 price increase, given documented 11x ROI for agents
- Net new bookings reaccelerate in Q2 and H2 2026 as the rookie sales force crosses its 12-month productivity inflection
- Commercial real estate leasing momentum, with office space at its strongest quarter since 2018, converts into CoStar subscription renewals and new enterprise adds
- The $700 million in planned 2026 buybacks, with $505 million already executed, reduces share count meaningfully, amplifying per-share earnings growth
What Could Go Wrong
- Commercial transaction volumes stay depressed through 2026 if interest rates remain elevated, limiting core CoStar subscription growth to single-digit organic rates
- Homes.com’s $550 million net investment burns through free cash flow without producing the subscriber growth necessary to justify ARPU expansion, repeating the pattern Third Point publicly called “a reckless drain”
- Nasdaq-100 removal on May 18 triggers passive fund selling at a moment when institutional conviction is already low, with the stock 49% down year to date
- Q2 bookings fail to reverse sequential declines for a fourth consecutive quarter, undermining management’s second-half confidence narrative
- Gross margin compression accelerates if Matterport integration costs and domain expansion into France, Australia, and Germany outpace revenue contribution timelines
Should You Invest in CoStar Group, Inc.?
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