Analyst Report: CSGP

1. EXECUTIVE SUMMARY

CoStar Group fell 20.62% over the week to a $28.14 close on Thursday 29 October 2026, from $35.45 on 22 October, and almost all of the damage came on Wednesday 28 October, when the shares dropped 13.96% on 18,319,100 shares traded. The trigger was a Q3 report released with a $730M acquisition of Vexcel after the close on 27 October. Net new bookings of $37 million, against $84 million a year earlier, and 2026 revenue guidance below the Street (per TIKR) outweighed a quarter in which revenue rose 14% and adjusted EBITDA doubled. Several brokers cut price targets the next morning. The shares rose 2.18% on Thursday, leaving them 57.16% lower year to date and 8.7% above the 52-week low of $25.89. Valuation has compressed to a 15.7 forward P/E, and the next test is whether bookings recover in Q4, as management says they will.

2. THE CATALYST

Q3 results and the Vexcel purchase were announced together after the close on Tuesday 27 October, and the sell-off came in the Wednesday session (Bisnow, 28 October).

Management blamed economic headwinds and slower-than-expected sales force growth for the bookings shortfall (Bisnow). A separate write-up cited inside-sales attrition (StockStory via Yahoo Finance). TIKR said Q4 guidance implies roughly 10% growth.

The Vexcel deal is all cash for an aerial imagery business with about $140M of trailing revenue, up 30%, and closing is expected early next year (Bisnow). TIKR reported it is funded from cash and a credit line. Investing.com said the deal raised questions about capital deployment while bookings were under scrutiny, and concluded that the bookings miss, a wave of target cuts and the acquisition together overwhelmed the earnings beat.

Analyst actions on 28 October:

• JPMorgan cut its target to $44 from $52 and kept Overweight (MarketBeat).
• TIKR counted five firms cutting targets that morning and said BTIG cited a fifth consecutive bookings miss. MarketBeat instead lists BTIG as keeping Buy with a $35 target, so the BTIG action is conflicting.
• Jefferies cut its target, per Investing.com as cited by Bisnow, without sourced levels.
• Goldman Sachs, Baird, KBW and Wells Fargo lowered targets, with no new levels given (MarketBeat).
• Citizens reiterated Market Outperform, from a headline only (Investing.com).

The brief found no sourced cause for the 22 October rally of 7.75% on 8,311,300 shares, the 5.01% fall on 27 October before results, or the rebound on 29 October.

3. COMPANY PROFILE

CoStar Group is a Real Estate Services company with a $11.40bn market cap. It provides information, analytics and online marketplace services to real estate businesses in the United States, Australia, Canada, Europe, Asia Pacific and Latin America. Its products include CoStar Property, Leasing, Sales, Owners and Markets.

Recent history in the brief:

• In Q2, revenue guidance was lowered by about 2% at the midpoint while the $780–820M EBITDA range was reiterated (Investing.com, 29 July).
• Baird moved to Neutral from Outperform after the CFO left without guidance being reiterated, around mid-July (StockStory via Yahoo Finance, approximate date).
• The CEO bought about $2.49M of stock around August (TIKR).
• The Q3 release set out about $150M of savings this year and at least another $200M identified over 12–18 months. The 2028 adjusted EBITDA target of $1.25bn stands (StockStory via Yahoo Finance).

4. DEEP DIVE ANALYSIS

Do fundamentals justify the move? Profit growth was strong, and TIKR reported an adjusted EPS of $0.38 against a $0.34 consensus (a single-source figure). The sell-off followed the growth indicator that investors watch most closely. Bookings under half of the prior year's level, guidance below consensus and a cash acquisition arriving the same evening gave holders several reasons to reduce exposure at once. BTIG's reported reference to a fifth straight bookings miss (TIKR) suggests the problem is recurring. This is inference, but a 13.96% single-day fall on 18,319,100 shares, about 2.8 times the 50-session average of 6,565,212, fits a re-rating of growth expectations and not a routine earnings reaction.

Comparable episodes. The stock fell about 18.2% roughly 11 months earlier on Q3 results and a Q4 EPS outlook below consensus (StockStory via Yahoo Finance, approximate date). RBC cut its target to $34 from $39 on 13 July, flagging tougher bookings comparisons, and Citizens cut to $35 from $44 on 29 July after the Q2 guidance reduction. StockStory counted 21 moves greater than 5% over the past year.

Peers and sector. Over the same period AMT rose 2.37%, WELL fell 1.78%, EQIX rose 8.82%, PLD rose 1.07%, CCI rose 12.69% and O rose 0.25%, while the S&P 500 gained 0.74%. The brief offers no explanation linking peer moves to CoStar, so the divergence is unexplained. Investing.com said the real estate data sector has faced high rates and softer transaction volumes. The Q3 release projected net absorption giving back 2.7M sq ft over the 12 months to September 2026 (StockStory via TradingView).

Bull case. Management expects bookings to improve in Q4 (TIKR). The cost programme supports the 2028 EBITDA target. TIKR said the stock had traded at 19x forward earnings against a five-year average of 66x and sat near September's five-year low of 17x after the drop. The forward P/E is now 15.7. Vexcel is growing about 30% (Bisnow), and Matterport is expected to turn profitable by the end of next year (Bisnow).

Bear case. Simply Wall St reported analysts arguing that CoStar leans too hard on margin preservation while its growth engines slow. Sales force attrition, a prior CFO exit, repeated guidance cuts this year and a debt-funded acquisition add to the case. The trailing P/E of 64.0 shows how far earnings still lag the valuation history.

Consensus targets conflict: $35.53, $35.68 and $35.11 (TradingView), $39.11 (MarketBeat) and $35.85 (Yahoo Finance). TradingView's $35.53 is based on 19 analysts. All of these sit above the $28.14 close.

5. TECHNICAL SNAPSHOT

The $28.14 close sits below the 50-day average of $30.37 and the 200-day average of $36.84, and 8.7% above the 52-week low of $25.89 set on 29 July 2026, while the 52-week high of $72.50 came a year ago on 29 October 2025. Thursday's 7,154,400 shares was 1.09x the 50-session average, so the bounce came on ordinary volume after the 18,319,100 shares of the prior day. The nearest support is the 28 October close of $27.54, with the $25.89 low below it. The nearest resistance is the 27 October close of $32.01, close to the 50-day average.

6. RISK FACTORS

• Bookings may stay weak if sales force attrition continues, which would leave the Q4 recovery unproven.
• Vexcel adds cash and credit-line spending while growth investors question capital deployment.
• Guidance of $3.75–3.77bn sits below the Street figure, which leaves room for further estimate cuts.
• Sector conditions, including high rates and softer transaction volumes, persist.
• Source quality: guidance and bookings figures come from secondary coverage, and the company release was not reviewed.

Dated catalysts: the Q4 bookings report is due early next year, and the Vexcel closing is expected early next year. The next earnings date was not found in the sources.

7. ACTIONABLE OUTLOOK

Short term (1-2 weeks): The stock has stabilised after the drop, with a 2.18% gain on Thursday. Trading probably stays between the $27.54 close and the $32.01 close while brokers finalise target changes. A close below $27.54 would put the $25.89 low in view.

Medium term (1-3 months): No scheduled results fall in this window, so direction depends on evidence of sales hiring, further cost savings and any update on the Vexcel financing. Recovery above the 50-day average of $30.37 would show buyers returning.

Long term: The thesis rests on the 2028 adjusted EBITDA target of $1.25bn, which management kept. The bookings trend now carries more weight in assessing it, and the Q4 bookings report is the first test. This is analysis only, not personal financial advice.