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Costar Group, Inc. Stock: price and insider trades · United States
1 insider bought €2.2M of shares over the last 90 days, the latest filed 05 Aug 2026.
Costar Group, Inc.: what insiders have been doing
Every trade that managers of Costar Group, Inc. disclose to SEC (Form 4) is tracked on this page. The company sits in the Real Estate sector and is based in Arlington County, United States. It was founded in 1987. Over the twelve months to 18 October 2026, 48 filings were filed, from 17 insiders.
On the market, 3 insiders bought (4 purchases totalling €4.3M) while 2 insiders sold (4 sales totalling €462k). Purchases outweigh sales by €3.9M. Unlike grants, an open-market purchase is paid for by the insider, at the market price. Among those who bought: 2 senior executives and 1 chief executive. The largest single trade was a purchase of €2.2M by Florance Andrew C, published on 5 August 2026, equal to 0.021% of the market capitalisation.
In the case of 2 purchases, another manager of the company was buying within the same 30 days. Purchases made close together by different insiders form what is called a cluster. The most recent open-market purchase was published on 5 August 2026, 74 days ago. The median gap between a trade and its publication by SEC (Form 4) is 2 days. Section 16 rules allow two business days to file each Form 4.
For context, the typical company on the same exchange (median of 5,816 companies) published 19 filings over the same period, against 48 filings here. Since 2016, the database holds 5 purchases and 39 sales by insiders of the company. On the fundamentals side, the SEC filing (10-K) for the period ending 31 December 2025 lists revenue at 3.25 bn USD and net income at 7.0 m USD.
For comparison within the same sector, see the insider buying recorded at Agree Realty Corp and Simon Property Group Inc /DE/. This summary is built from SEC (Form 4) disclosures alone and does not predict where the share price will go.
Insider Decl.
227
Thresholds
n/a
Buy Volume
€5M
5 ops. · all time
Sell Volume
€40M
39 ops. · all time
Who traded when
BuySaleCynthia Cammett Cann3 sales
Frederick G. Saint3 sales
John W. Hill3 sales
Andrew C. Florance2 buys
Louise S. Sams1 buy
Michael J. Desmarais1 sale
+2 other insiders
Since the insiders bought
- +9.2%Entry US$29.58 · Close 16 Oct 2026 US$32.31
- -27.9%Entry US$46.33 · Close at T+90 US$33.39
- -29.3%Entry US$47.60 · Close at T+90 US$33.66
Entry is the close on the day after publication, the first price a reader could act on. Prices in the listing currency. Past moves are not a forecast.
Analyst consensus: bullish or bearish?
Analysts rate Costar Group, Inc. Buy (bullish), based on 20 analysts. Average price target: US$37.40.
This score ranks the purchase within its own market. A position size is suggested only on the venues of the backtested strategy universe; elsewhere, signals stay on watch. Not investment advice.
Fundamental score
Ranked 17,038 of 24,148 companies
37.9
score / 100
Value36
Quality40
FCF yld0.3%
Earn yld0.1%
EV/EBITDA·
ROE0.9%
Gross mgn79%
Net mgn0.2%
Debt/EBITDA6.2x
Pillars2/3
Transparent value + quality ranking, distinct from the insider signal.
Financial data
as of FY 2025FY ended December 2025 · cache
US$30.11
Analyst consensus
20 analystsBuy
US$25.00Target US$37.40(+24%)US$53.00
Income statement
RevenueUS$3.2B
Gross profitUS$2.6B79% margin
EBITDAUS$191M6% margin
Net incomeUS$7M2.1% margin
Valuation
PER (trailing)167.3x
PER (forward)17.0x
P/Book1.5x
Beta0.80
Balance sheet & cash
Market capUS$12.2B
Total debtUS$1.2B
Free Cash FlowUS$41M
Debt / Equity15%
Profitability & ownership
ROE0.9%
ROA0.5%
% insiders0.8%
% institutions104.7%
Last declaration on 16 October 2026
Declarations227 total
756 shares@ US$32.00Common Stock, par value $0.01 per shareSEC:0001628280-26-066186:0
3,500 shares@ US$30.210.0009% mcap3.1% of flowCommon Stock, par value $0.01 per shareSEC:0001351689-26-000005:0
4,788 shares@ US$30.780.0013% mcap16.2% of flowCommon Stock, par value $0.01 per shareSEC:0001472762-26-000012:0
3,500 shares@ US$30.3050.0009% mcap3.1% of flowCommon StockSEC144:0001965301-26-000108
83,300 shares@ US$29.890.021% mcap8.5% of flowCommon Stock, par value $0.01 per shareSEC:0001628280-26-052968:0
Canonical exit: 2 Nov 2026 (T+90)
1,077 shares@ US$28.760.0003% mcap3.4% of flowCommon Stock, par value $0.01 per shareSEC:0001472762-26-000010:0
1,436 shares@ US$28.760.0004% mcap0.3% of flowCommon Stock, par value $0.01 per shareSEC:0001500076-26-000010:0
5,597 shares@ US$29.360.0014% mcap19.7% of flowCommon Stock, par value $0.01 per shareSEC:0001701994-26-000006:0
8,262 sharesCommon Stock, par value $0.01 per shareSEC:0001449719-26-000002:0
8,262 sharesCommon Stock, par value $0.01 per shareSEC:0001742356-26-000002:0
8,262 sharesCommon Stock, par value $0.01 per shareSEC:0001351689-26-000002:0
8,262 sharesCommon Stock, par value $0.01 per shareSEC:0001390194-26-000002:0
8,262 sharesCommon Stock, par value $0.01 per shareSEC:0001497570-26-000011:0
8,262 sharesCommon Stock, par value $0.01 per shareSEC:0001628280-26-045326:0
8,262 sharesCommon Stock, par value $0.01 per shareSEC:0001796961-26-000004:0
461 sharesCommon Stock, par value $0.01 per shareSEC:0001472762-26-000008:0
2,873 shares@ US$43.633.2% of flowCommon Stock, par value $0.01 per shareSEC:0001925959-26-000006:0
428 shares@ US$43.631.3% of flowCommon Stock, par value $0.01 per shareSEC:0001758152-26-000006:0
1,194 shares@ US$43.635.7% of flowCommon Stock, par value $0.01 per shareSEC:0001472762-26-000006:0
11,107 shares@ US$43.633.4% of flowCommon Stock, par value $0.01 per shareSEC:0001925960-26-000008:0
482 shares@ US$43.631.5% of flowCommon Stock, par value $0.01 per shareSEC:0001758152-26-000008:0
2,977 shares@ US$43.631.5% of flowCommon Stock, par value $0.01 per shareSEC:0001717178-26-000008:0
17,676 sharesCommon Stock, par value $0.01 per shareSEC:0001925959-26-000004:0
21,920 sharesCommon Stock, par value $0.01 per shareSEC:0001758152-26-000004:0
12,268 sharesCommon Stock, par value $0.01 per shareSEC:0001701994-26-000004:0
25 of 227 declarations
About Costar Group, Inc.
CoStar Group, Inc. (NASDAQ: CSGP) is a leading provider of real estate information, analytics, online marketplaces, and 3D digital twin technology. Headquartered in Arlington, Virginia, United States, the company was founded in 1986 and built its franchise around one core proposition: helping commercial and residential real estate participants make better decisions with proprietary, high-quality, decision-ready data. For investors, CoStar is best understood as a digital infrastructure company embedded in the property ecosystem rather than as a traditional listings portal.
The group’s operating model is built on a portfolio of well-known brands. CoStar remains the historical core of the business, delivering commercial real estate data, analytics, and news. LoopNet is positioned as a leading commercial real estate marketplace. Apartments.com serves multifamily rental demand in the U.S. residential segment, while Homes.com has become a major strategic growth initiative in the residential marketplace. Domain provides exposure to the Australian property market, giving CoStar a meaningful international footprint. The acquisition of Matterport further expanded the platform into 3D digital twins and AI-enabled property visualization and analytics.
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From a competitive standpoint, CoStar has a strong moat built on data depth, brand strength, and long-standing relationships with brokers, owners, developers, and property managers. Its scale in commercial real estate information is a key differentiator, and the company increasingly combines data, marketplaces, and immersive technology into a broader real estate software and media ecosystem. That said, the business still faces real-estate cyclicality, competitive pressure from other property portals, and the need to continuously defend traffic, product relevance, and monetization.
Geographically, CoStar is primarily a U.S. business, but it has international operations and ambitions, including presence in London and Australia. Management has recently emphasized profitable growth, broader product development for commercial real estate, international expansion, and the use of AI across the organization to improve efficiency and accelerate revenue growth.
Recent milestones underscore that strategy. In Q1 2026, revenue increased 23% year over year to $897 million, while net new bookings improved, and management raised full-year 2026 guidance. The company also completed the Matterport acquisition and highlighted initiatives aimed at scaling Homes.com, enhancing commercial product offerings, and improving long-term shareholder value. Listed on the NASDAQ in the United States, CoStar remains one of the most important public-market plays on the digitization of real estate.
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