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CoStar Group

CSGP No buying or selling
CIK 0001057352 #134 in the set updated 17 Sep 2026
Bought (1 mo)
$0.00
out of their own pocket, the only kind of buying there is
Sold (1 mo)
$0.00
$0.00 on a plan · $0.00 straight out of an exercise
Sold at will
$0.00
0 of 0 sales
Net
$0.00
$0.00 against sales at will

By person

17 insiders · 0 transactions
55.5×

Andrew C. Florance holds 55.5 times base salary in stock. $55.59M of shares against $1.00M in salary for 2025.

Salary from the company's own proxy. The shares are what Andrew C. Florance last reported holding, valued at $30.78, the price Common Stock, par value $0.01 per share was last bought or sold at on the open market here, on 7 Aug 2026.

Insider
Role
Bought
Sold
Net
Holding
Worth
Change
KLEIN MICHAEL R
Director
1,848,592
$56.90M
−7.2%
FLORANCE ANDREW C
Founder and CEO
1,806,165
$55.59M
+44.7%
SIMURO FRANK
Chief Technology Officer
414,491
$12.76M
+6.1%
SAINT FREDERICK G.
President, Marketplaces
278,415
$8.57M
−5.8%
NASSETTA CHRISTOPHER J
Director
229,715
$7.07M
−0.7%
Ruggles Lisa
Senior VP, Global Operations
174,915
$5.38M
+1.3%
LOWN CHRISTIAN M.
Chief Financial Officer
129,653
$3.99M
+248.3%
Boxer Gene
General Counsel and Secretary
95,517
$2.94M
+120.6%
DESMARAIS MICHAEL J
Chief Human Resources Officer
87,725
$2.70M
+36.1%
Sams Louise S
Director
28,671
$882.49K
+77.9%
Musslewhite Robert W
Director
26,539
$816.87K
+75.1%
Hill John W
Director
22,993
$707.72K
+13.6%
Cann Cynthia Cammett
Chief Accounting Officer
18,822
$579.34K
−32.6%
Brunner Angelique G.
Director
18,428
$567.21K
+162.4%
Glaser Rachel C
Director
12,419
$382.26K
+88,607%
McCarthy Christine M
Director
11,585
$356.59K
+3,210%
BERISFORD JOHN L
Director
11,235
$345.81K

No percentages here. These insiders hold more than one class of share between them, and the share count on file covers one of them rather than all. Dividing the two would compare different things.

Nothing of that kind in this period.

What was left out

Form 4 filings counted 0
Amendments (4/A) skipped 0
Filings about a different issuer 0
Unreadable filings 0
Joint filings 0
Sales on a Rule 10b5-1 plan 0
Sales straight out of an exercise 0
Sales at will 0
Transactions with no price 0
Shares from compensation/vesting 0
History held since 13 Sep 2016