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CoStar Group (CSGP)

CoStar Group on one page: short interest, daily short volume, fails to deliver, planned sales, large holders, 13F holders, financials, earnings dates and insider trades. Listed on Nasdaq, classified by the SEC as services-business services, nec.

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13.3M

Short interest

settlement 2026-09-30

2.0

Days to cover

-0.7 days vs prior

57.0%

Short share of volume

2026-10-09

3,694

Fails to deliver

settlement 2026-09-09

Tue 27 Oct

Next earnings

estimated date

$2.2M

Insider flow, 90 days

1 buys, 2 sells

As of 2026-10-09.

Short interest

FINRA, twice a month. The newest 24 settlements in the table, 48 in the chart. JSON

As of 30 September 2026, short interest in CSGP is 13,284,736 shares, down 5,617,022 shares over the last month. Over the last 48 readings it ranged from 8,074,429 shares (15 October 2024) to 26,150,995 shares (27 February 2026). At the reported average volume of 6.7M shares a day that is 2.0 days to cover.

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SettlementShares shortChangeAvg daily volumeDays to cover
2026-09-3013,284,736-10.5%6,734,6161.97
2026-09-1514,839,529-21.5%5,527,5412.68
2026-08-3118,901,758+13.2%7,540,3222.51
2026-08-1416,691,379+2.3%5,985,1902.79
2026-07-3116,312,412-0.1%8,517,3461.92
2026-07-1516,321,416+6.9%6,658,9942.45
2026-06-3015,266,339-10.8%8,017,1391.90
2026-06-1517,109,207+13.3%7,153,3022.39
2026-05-2915,095,773-19.0%6,284,2542.40
2026-05-1518,639,692+6.0%9,860,0001.89
2026-04-3017,590,854+5.7%6,297,8312.79
2026-04-1516,639,852-24.3%6,279,0152.65
2026-03-3121,977,041-8.3%6,694,7473.28
2026-03-1323,958,704-8.4%5,254,5954.56
2026-02-2726,150,995+35.2%6,981,7563.75
2026-02-1319,341,189+16.4%7,974,7512.43
2026-01-3016,612,914+15.2%6,606,4412.51
2026-01-1514,419,195-11.4%7,547,9761.91
2025-12-3116,266,374-7.3%3,925,3234.14
2025-12-1517,547,557+0.1%3,391,7405.17
2025-11-2817,534,153-3.1%4,616,0653.80
2025-11-1418,092,722+8.2%4,501,5164.02
2025-10-3116,725,267+6.4%4,153,2154.03
2025-10-1515,724,532+2.0%3,066,1135.13

Daily short volume

FINRA Reg SHO, the last 30 sessions. JSON

As of 9 October 2026, the short share of CSGP volume is 57.0%, up 5.3 points over the last five sessions. Over the last 30 readings it ranged from 26.0% (25 September 2026) to 60.3% (15 September 2026). The latest reading sits at the top of that range. The latest reading is 13.8 points above the 30-session average of 43.2%, on 1.5M shares reported.

DateShort volumeTotal volumeShort shareExempt
2026-10-09878K1.5M57.0%215
2026-10-081.1M2.6M40.7%1,487
2026-10-07488K1.2M40.2%86
2026-10-06507K1.4M35.0%5
2026-10-05692K1.9M36.6%4,388
2026-10-02658K1.3M51.7%31
2026-10-01688K1.7M40.6%11
2026-09-30774K2.2M35.1%1,627
2026-09-29646K2.1M30.8%473
2026-09-28512K1.7M30.1%0
2026-09-25596K2.3M26.0%0
2026-09-24719K1.8M41.0%18,122
2026-09-23826K2.1M39.3%6,112
2026-09-22575K1.7M33.8%4,925
2026-09-21660K1.7M38.6%133
2026-09-18534K1.9M28.8%304
2026-09-17584K1.3M43.6%51
2026-09-16585K1.2M47.8%169
2026-09-151.4M2.4M60.3%371
2026-09-141.1M2.1M51.0%55,878
2026-09-111.6M2.8M58.7%13,446
2026-09-101.6M3.2M50.8%307
2026-09-09702K1.6M44.7%1,104
2026-09-081.0M2.2M47.7%0
2026-09-04548K1.4M39.4%100
2026-09-03776K1.7M44.7%100
2026-09-021.1M1.9M58.6%131
2026-09-01975K2.2M43.8%2,538
2026-08-312.3M4.5M52.0%0
2026-08-28939K2.0M47.7%7,925

Fails to deliver

SEC, the last 30 settlement dates with a fail. JSON

As of 9 September 2026, the fails-to-deliver balance in CSGP is 3,694 shares, down 15,858 shares over the last settlement date. Over the last 30 readings it ranged from 1 share (19 August 2026) to 493,442 shares (20 March 2026). The latest reading sits at the bottom of that range.

SettlementShares failedPriceValue
2026-09-093,694$30.34$112K
2026-09-0319,552$31.26$611K
2026-09-0179,443$32.07$2.5M
2026-08-3162,865$32.22$2.0M
2026-08-265,560$32.81$182K
2026-08-191$31.38$31
2026-08-114,200$31.48$132K
2026-08-0381$28.76$2K
2026-07-28400$29.17$12K
2026-06-2235,999$30.12$1.1M
2026-06-1826,104$30.46$795K
2026-06-16323$32.04$10K
2026-05-265,309$33.95$180K
2026-05-2211,970$33.93$406K
2026-05-1837,704$32.68$1.2M
2026-05-141,288$31.97$41K
2026-05-1349,798$33.05$1.6M
2026-05-0853,143$34.98$1.9M
2026-04-2110$40.06$401
2026-04-20651$39.72$26K
2026-04-16171$39.31$7K
2026-04-156$37.60$226
2026-04-14243$37.06$9K
2026-04-102,690$37.32$100K
2026-04-012,800$40.34$113K
2026-03-311,919$40.88$78K
2026-03-2543$41.46$2K
2026-03-24491,248$42.91$21.1M
2026-03-23491,261$42.90$21.1M
2026-03-20493,442$42.82$21.1M

Insider trades

SEC Form 4, newest first, 50 of 100 shown. JSON

Over the last 90 days CSGP insiders reported 1 open-market buy ($2.5M) against 2 sells ($253K), so the dollar flow leans toward buying. Latest filing: Cann Cynthia Cammett (Chief Accounting Officer) on 2026-08-07.

DateInsiderTitleTypeSharesPriceValueOwned after
2026-08-07Cann Cynthia CammettChief Accounting OfficerSell5K$30.78$147K19K
2026-08-05Hill John WDirectorSell4K$30.21$106K23K
2026-08-04FLORANCE ANDREW CFounder and CEOBuy83K$29.89$2.5M1.8M
2026-08-01SAINT FREDERICK G.President, MarketplacesTax withholding1K$28.76$41K278K
2026-08-01Cann Cynthia CammettChief Accounting OfficerTax withholding1K$28.76$31K24K
2026-07-01LOWN CHRISTIAN M.Chief Financial OfficerTax withholding6K$29.36$164K130K
2026-06-23McCarthy Christine MDirectorGrant8K$0.00$012K
2026-06-23Sams Louise SDirectorGrant8K$0.00$029K
2026-06-23Musslewhite Robert WDirectorGrant8K$0.00$027K
2026-06-23Hill John WDirectorGrant8K$0.00$026K
2026-06-23Glaser Rachel CDirectorGrant8K$0.00$012K
2026-06-23Brunner Angelique G.DirectorGrant8K$0.00$018K
2026-06-23BERISFORD JOHN LDirectorGrant8K$0.00$011K
2026-06-15Cann Cynthia CammettChief Accounting OfficerTax withholding461$32.04$15K25K
2026-05-01FLORANCE ANDREW CPresident and CEOBuy3K$35.82$111K1.7M
2026-05-01FLORANCE ANDREW CPresident and CEOBuy68K$35.17$2.4M1.7M
2026-03-15Boxer GeneGeneral Counsel and SecretaryTax withholding482$43.63$21K95K
2026-03-15SIMURO FRANKChief Technology OfficerTax withholding11K$43.63$485K414K
2026-03-15DESMARAIS MICHAEL JChief Human Resources OfficerTax withholding3K$43.63$125K88K
2026-03-15Ruggles LisaSenior VP, Global OperationsTax withholding3K$43.63$130K175K
2026-03-15Cann Cynthia CammettChief Accounting OfficerTax withholding1K$43.63$52K25K
2026-03-15Boxer GeneGeneral Counsel and SecretaryTax withholding428$43.63$19K96K
2026-03-10DESMARAIS MICHAEL JChief Human Resources OfficerGrant18Kprice not stated in the filingnot stated91K
2026-03-10Boxer GeneGeneral Counsel and SecretaryGrant22Kprice not stated in the filingnot stated96K
2026-03-10LOWN CHRISTIAN M.Chief Financial OfficerGrant12Kprice not stated in the filingnot stated135K
2026-03-10FLORANCE ANDREW CPresident and CEOGrant124Kprice not stated in the filingnot stated1.7M
2026-03-10Cann Cynthia CammettChief Accounting OfficerGrant4Kprice not stated in the filingnot stated26K
2026-03-06Sams Louise SDirectorBuy1K$48.36$48K20K
2026-03-02SAINT FREDERICK G.President, MarketplacesBuy20K$45.33$907K280K
2026-03-02Glaser Rachel CDirectorBuy1K$44.94$45K4K
2026-03-01SIMURO FRANKChief Technology OfficerTax withholding19K$44.63$835K426K
2026-03-01DESMARAIS MICHAEL JChief Human Resources OfficerTax withholding6K$44.63$284K73K
2026-03-01Ruggles LisaSenior VP, Global OperationsTax withholding9K$44.63$399K178K
2026-03-01LOWN CHRISTIAN M.Chief Financial OfficerTax withholding7K$44.63$320K123K
2026-03-01SAINT FREDERICK G.President, MarketplacesTax withholding11K$44.63$495K260K
2026-03-01Cann Cynthia CammettChief Accounting OfficerTax withholding1K$44.63$62K22K
2026-03-01FLORANCE ANDREW CPresident and CEOTax withholding60K$44.63$2.7M1.5M
2026-03-01Boxer GeneGeneral Counsel and SecretaryTax withholding5K$44.63$203K74K
2026-02-27FLORANCE ANDREW CPresident and CEOBuy56K$44.52$2.5M1.6M
2026-02-19SIMURO FRANKChief Technology OfficerTax withholding4K$49.07$217K444K
2026-02-19SIMURO FRANKChief Technology OfficerDisposition31K$0.00$0449K
2026-02-19Ruggles LisaSenior VP, Global OperationsTax withholding3K$49.07$158K187K
2026-02-19Ruggles LisaSenior VP, Global OperationsDisposition18K$0.00$0190K
2026-02-19SAINT FREDERICK G.President, MarketplacesTax withholding2K$49.07$105K271K
2026-02-19SAINT FREDERICK G.President, MarketplacesDisposition18K$0.00$0273K
2026-02-19FLORANCE ANDREW CPresident and CEOTax withholding19K$49.07$943K1.5M
2026-02-19FLORANCE ANDREW CPresident and CEODisposition105K$0.00$01.6M
2026-02-15SIMURO FRANKChief Technology OfficerTax withholding4K$44.99$187K479K
2026-02-15Ruggles LisaSenior VP, Global OperationsTax withholding4K$44.99$161K208K
2026-02-15SAINT FREDERICK G.President, MarketplacesTax withholding2K$44.99$109K291K

Form 4 filings are due within two business days of the trade. Insiders sell for many reasons that say nothing about the company; open-market buys are rarer.

Planned sales (Form 144)

Newest first. JSON

2 Form 144 notices on file for CSGP worth $258K at the prices reported; 1 in the last 90 days worth $106K. Latest: Hill John W filed on 2026-08-05 to sell 3,500 shares ($106K) from 2026-08-05.

FiledSellerSharesMarket valueOf outstandingSale fromBroker
2026-08-05Hill John WDirector4K$106K0.001%2026-08-05Ameritas Investment Corp
2025-11-13Hill John WDirector, Member of immediate family of any of the foregoing2K$152K0.001%2025-11-13Ameritas Investment Corp

Large holders (13D and 13G)

One row per reporting person with its latest filing, newest first. JSON

4 holders report 5% or more of CSGP in their latest filing, all on Schedule 13G (passive). The largest reported stake is Vanguard Portfolio Management at 9.1% of the class (38,292,035 shares), filed 2026-04-29 for an event on 2026-03-31.

FiledFormHolderSharesOf classEvent
2026-08-1413GRonald Baronparent holding company, individual21.6M5.3%2026-06-30
2026-08-1413GBaron Capital Group, Inc.corporation, parent holding company21.6M5.3%2026-06-30
2026-08-1413GBAMCO INC /NY/investment adviser, corporation18.7M4.6%2026-06-30
2026-08-1413GBaron Capital Management, Inc.investment adviser, corporation2.9M0.7%2026-06-30
2026-04-2913GVanguard Portfolio Managementinvestment adviser38.3M9.1%2026-03-31
2026-04-2913GVanguard Capital Managementinvestment adviser31.6M7.5%2026-03-31
2026-03-2613G/Ano. 13The Vanguard Groupinvestment adviser00.0%2026-03-13

13F holders

Tracked managers holding CSGP at their latest 13F. JSON

6 of the 30 tracked managers held CSGP at their latest 13F, $345.9M in total at quarter-end prices. AQR Capital Management is the largest at $239.2M (0.1% of its portfolio) as of 2026-06-30. Over the prior quarter 4 added shares and 2 cut.

FundQuarterSharesValueOf portfolioChange in shares
AQR Capital Management2026-06-308.4M$239.2M0.08%+7.2M
Two Sigma Investments2026-06-301.1M$31.3M0.02%+802K
D. E. Shaw & Co.2026-06-301.0M$29.5M0.01%-4.9M
Millennium Management2026-06-30747K$21.2M0.01%+623K
Citadel Advisors2026-06-30742K$21.0M0.00%-346K
Point72 Asset Management2026-06-30131K$3.7M0.00%new

Only the 30 tracked managers on the funds hub; a 13F reports long positions in US listed stock at quarter end, 45 days late, and says nothing about shorts or positions sold since.

Financials

SEC XBRL, as filed. JSON

In Q2 FY 2026 (quarter ended 2026-06-30) CoStar Group reported revenue of $925.0M, up 18.4% from the same quarter a year earlier, and net income of $55.0M (0.14 diluted EPS). In FY 2025 it generated $430.0M of operating cash flow and spent $500.0M on buybacks. As of 2026-06-30, cash was $1.27B against $1.00B of debt.

Cash
$1.27B
Debt
$1.00B
Equity
$7.93B
Total assets
$10.14B
Shares outstanding
405,197,588

Quarterly, last 8 quarters

QuarterPeriod endRevenueNet incomeMarginDiluted EPS
Q2 FY 20262026-06-30$925.0M$55.0M5.9%0.14
Q1 FY 20262026-03-31$897.0M$3.0M0.3%0.01
Q4 FY 2025derived2025-12-31$900.4M$46.9M5.2%n/a
Q3 FY 20252025-09-30$833.6M-$30.9M-3.7%-0.07
Q2 FY 20252025-06-30$781.0M$6.0M0.8%0.01
Q1 FY 20252025-03-31$732.0M-$15.0M-2.0%-0.04
Q4 FY 2024derived2024-12-31$709.2M$60.1M8.5%n/a
Q3 FY 20242024-09-30$692.6M$53.0M7.7%0.13

Fiscal years, with buybacks and dividends

Fiscal yearEndsRevenueNet incomeOperating cash flowCapexBuybacksDividends
FY 20252025-12-31$3.25B$7.0M$430.0M$307.0M$500.0Mn/a
FY 20242024-12-31$2.74B$139.0M$393.0M$579.0M$0n/a
FY 20232023-12-31$2.46B$375.0M$490.0M$118.0M$0n/a
FY 20222022-12-31$2.18B$369.5M$478.7M$35.2Mn/an/a
FY 20212021-12-31$1.94B$292.6M$469.7M$123.7Mn/an/a

Quarters are the three-month figures the company reports; a fourth quarter marked derived is the fiscal year less the three reported quarters, since companies report it only inside the 10-K. Fiscal years are the annual figures. Buybacks are the cash the company paid to repurchase its common stock in the year, not the amount authorized. Balance sheet lines are as of 2026-06-30; shares outstanding as of 2026-07-27 from the cover page.

What this page is

CoStar Group in the regulatory record

Regulators publish company data in separate files that never sit next to each other: FINRA's twice-monthly short interest, its daily short sale volume, the SEC's fails-to-deliver counts, and each insider's Form 4. A company page puts those series for one ticker on one URL, with planned sales, large holders, 13F holders and financials beside them, so the short position, the daily flow, the settlement fails and what insiders are doing can be read together.

Each section has its own history table, a one-line summary of the latest figures and its own JSON and CSV links, and says when its source last updated.

This page follows CoStar Group (CSGP), SEC CIK 1057352, listed on Nasdaq, classified by the SEC as services-business services, nec. The cross-market tables live on the short interest and insider transactions hubs.

Source and updates

Short interest
FINRA consolidated short interestSource: FINRA.Twice a month, about eight business days after settlement. Latest 2026-09-30.JSON and CSV
Daily short volume
FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-10-09.JSON and CSV
Fails to deliver
SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-09-09.JSON and CSV
Planned sales
SEC EDGAR Form 144Source: SEC.New notices appear shortly after the SEC posts them; a notice is filed on or before the sale. Latest 2026-08-05.JSON and CSV
Large holders
SEC EDGAR Schedule 13D and 13GSource: SEC.New filings appear shortly after the SEC posts them. A 13D is due within five business days of crossing 5%; a 13G follows the passive schedule. Latest 2026-08-14.JSON and CSV
13F holders
SEC EDGAR Form 13F-HRSource: SEC.Quarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
Financials
SEC EDGAR 10-K and 10-Q filingsSource: SEC.Weekly; values are as filed in the 10-Q and 10-K. Latest 2026-06-30.JSON and CSV
Earnings dates
SEC EDGAR 8-K filings (Item 2.02)Source: SEC.Twice a day. Reported dates come from the company's 8-K filings; the next date is marked as an estimate until the 8-K arrives. Latest 2026-07-28.JSON and CSV
Insider trades
SEC EDGAR Form 4Source: SEC.New filings appear shortly after the SEC posts them; they're due two business days after the trade. Latest 2026-08-07.JSON and CSV
Company record
EDGAR filing index for CIK 1057352Ticker, name and exchange from the SEC's company list, refreshed weekly.
Rate limits
10 requests a minute without a key, 30 with a free key from a free account.

How to read it

  • Read the position against the flow: rising short interest with a high daily short share is new shorting; rising short interest with a normal short share is old shorts holding on.
  • Insider buys next to a large short position are rare and stand out; insider sells next to one are common and mean little.
  • Fails to deliver matter relative to the float, not in absolute shares; a million failed shares in a mega cap is noise.

Analysis of what the data shows, not advice. XOOMAR does not recommend buying, selling or holding anything.

Other companies the SEC classifies as services-business services, nec

Datasets

Frequently Asked Questions

How much of CSGP is sold short?
13,284,736 shares were held short at the 2026-09-30 settlement, 2.0 days of average volume. FINRA publishes the next count about eight business days after the 15th and the last business day of the month.
What is CSGP's daily short volume?
On 2026-10-09, 878,473 of the 1,540,586 CSGP shares reported to FINRA were sold short, 57.0% of the day's reported volume. Short volume is a flow for one day, not a position.
Does CSGP have fails to deliver?
The SEC's latest file shows 3,694 CSGP shares failed to deliver at settlement 2026-09-09. Fails are reported per settlement date and published twice a month with a lag.
Are CSGP insiders buying or selling?
Over the last 90 days CSGP insiders reported 1 open-market buy ($2.5M) against 2 sells ($253K), so the dollar flow leans toward buying. Latest filing: Cann Cynthia Cammett (Chief Accounting Officer) on 2026-08-07.
Have CSGP insiders filed to sell?
2 Form 144 notices on file for CSGP worth $258K at the prices reported; 1 in the last 90 days worth $106K. Latest: Hill John W filed on 2026-08-05 to sell 3,500 shares ($106K) from 2026-08-05.
Who owns 5% or more of CSGP?
4 holders report 5% or more of CSGP in their latest filing, all on Schedule 13G (passive). The largest reported stake is Vanguard Portfolio Management at 9.1% of the class (38,292,035 shares), filed 2026-04-29 for an event on 2026-03-31.
What did CSGP report last quarter?
In Q2 FY 2026 (quarter ended 2026-06-30) CoStar Group reported revenue of $925.0M, up 18.4% from the same quarter a year earlier, and net income of $55.0M (0.14 diluted EPS). In FY 2025 it generated $430.0M of operating cash flow and spent $500.0M on buybacks. As of 2026-06-30, cash was $1.27B against $1.00B of debt.
Which tracked 13F managers own CSGP?
6 of the 30 tracked 13F managers held CSGP shares at their latest filing, $345.9M in all. The largest: Cliff Asness's AQR Capital Management (8.4M shares, $239.2M), Two Sigma Investments (1.1M shares, $31.3M), D. E. Shaw & Co. (1.0M shares, $29.5M), Izzy Englander's Millennium Management (747K shares, $21.2M), Ken Griffin's Citadel Advisors (742K shares, $21.0M), Steve Cohen's Point72 Asset Management (131K shares, $3.7M).

Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.