NASDAQ: CSGP
Costar Group Inc Stock Ownership - Who owns Costar Group?

Insider buying vs selling

Have Costar Group Inc insiders been buying or selling?

Buy
Sell
NameRoleDateSharesPriceValue
Louise S. SamsDirector2026-03-061,000$48.36
$48.36kBuy
Frederick G. SaintPresident Marketplaces2026-03-0220,000$45.33
$906.60kBuy
Rachel C. GlaserDirector2026-03-021,000$44.94
$44.94kBuy
Frank SimuroChief Technology Officer2026-03-0118,702$44.63
$834.67kSell
Andrew C. FlorancePresident and CEO2026-03-0159,593$44.63
$2.66MSell
Frederick G. SaintPresident Marketplaces2026-03-0111,096$44.63
$495.21kSell
Lisa RugglesSenior VP Global Operations2026-03-018,931$44.63
$398.59kSell
Cynthia Cammett CannChief Accounting Officer2026-03-011,385$44.63
$61.81kSell
Gene BoxerGeneral Counsel and Secretary2026-03-014,547$44.63
$202.93kSell
Michael J. DesmaraisChief Human Resources Officer2026-03-016,353$44.63
$283.53kSell

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Net Insider Buy/Sell (L12M) Ownership

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CSGP Shareholders

What type of owners hold Costar Group Inc stock?

Institutional
Insider
Retail
NameHoldSharesValueType
Vanguard Group Inc16.70%70,108,999$3.18BInstitution
Blackrock Inc8.09%33,970,626$1.54BInstitution
Bamco Inc4.64%19,498,099$884.04MInstitution
State Street Corp4.44%18,632,352$844.79MInstitution
Principal Financial Group Inc4.18%17,566,074$796.45MInstitution
Baillie Gifford Co3.08%12,933,185$586.39MInstitution
Geode Capital Management LLC2.90%12,182,167$552.34MInstitution
Capital International Investors2.58%10,842,010$491.58MInstitution
Akre Capital Management LLC2.29%9,617,805$436.07MInstitution
Janus Henderson Group PLC1.78%7,473,380$338.84MInstitution

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CSGP vs Real Estate Service Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
CSGP98.53%1.47%Net SellingNet Selling
BEKE4.92%0.00%
JLL93.98%2.79%Net SellingNet Selling
FSV71.15%0.00%
CIGI71.21%19.99%

Costar Group Stock Ownership FAQ

Who owns Costar Group?

Costar Group (NASDAQ: CSGP) is owned by 98.67% institutional shareholders, 1.47% Costar Group insiders, and 0.00% retail investors. Vanguard Group Inc is the largest individual Costar Group shareholder, owning 70.11M shares representing 16.70% of the company. Vanguard Group Inc's Costar Group shares are currently valued at $3.04B.

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