CoStar Group Inc

CSGPNASDAQ
$27.10
-0.99-3.52%
Last update: Sep 28, 1:44 PM

CoStar Group Ownership & Insider Activity

CoStar Group (CSGP) institutional and insider ownership, recent insider transactions and ownership breakdown.

Insiders own 1.6% of shares outstanding. Institutional investors hold 79.2%. Over the past 90 days, insiders made 1 purchase worth $2.5M and 2 sales worth $253K.

Shares Outstanding

405.198M

Shares Float

402.258M

Insider Shares Owned

6.366M

Insider % Owned

1.6%

Institutional Shares Held

320.797M

Institutional % Held

79.2%

Ownership Breakdown

Net Insider Activity by Month

Purchases (90d)

1

$2.5M total

Sales (90d)

2

$253K total

Net Activity

Net Buying

Net Value (90d)

$2.2M

CoStar Group Insider Transactions (Last 6 Months)

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DateInsiderTitleTypeSharesPriceValue
Aug 7, 2026Cammett Cynthia CannCHIEF ACCOUNTING OFFICERSELL4.788K$30.78$147K
Aug 5, 2026John HillDIRECTORSELL3.500K$30.21$106K

Congressional Trading Activity

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DateMemberPartyChamberActionAmount
Aug 19, 2026Gilbert Ray CisnerosDHousePurchase$1,001 - $15,000
Apr 14, 2026Gilbert Ray CisnerosDHouseSale (Partial)$1,001 - $15,000