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 JS
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Detailed Insider History for:
COSTAR GROUP INC: CSGP
Price: 3/7/25 52-Wk
High		 52-Wk
Low		 Mkt Cap (mm) Shrs Out (mm) 3-Mth Ave
Vol (m)		 Ind. Yield Short Int
% Float		 Inst. Owned Insider Owned
$79.39 $100.38 $68.26 $33,484 422 3,103 0.0% 4.4% 100.46% 1.42%
Exch Sector Industry Sub-Industry
NasdaqGS Services Business Services Services- Business Services, N E C
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Insider Statistics
T N H M S
Filer Name
Insider Title
Trans Type
Dollar Value
Shares Traded
Trans Date From
Trans Date To
Trans Price From
Trans Price To
Total Holdings
Delta % Owned
Owned
Other Info
Input Date
1
    
 
CANN CYNTHIA CAMMETT
CAO
JB
---
1,498
---
3/5/25
---
---
33,715
4.6
D
R
3/7/25 - 6:06:41 pm
2
    
 
BOXER GENE
GC,SEC
JB
---
12,492
---
3/5/25
---
---
79,053
18.8
D
R
3/7/25 - 6:06:31 pm
3
    
 
FLORANCE ANDREW C
PR,CEO,DIR
JB
---
76,232
---
3/5/25
---
---
1,672,832
4.8
D
R
3/7/25 - 6:06:21 pm
4
    
 
DESMARAIS MICHAEL J
HR
JB
---
9,026
---
3/5/25
---
---
82,759
12.2
D
R
3/7/25 - 6:06:11 pm
5
    
 
RUGGLES LISA
VP,OO
JS
$565,013
7,410
---
3/1/25
---
$76.25
213,171
-3.4
D
---
3/3/25 - 7:11:04 pm
6
    
 
DESMARAIS MICHAEL J
HR
JS
$296,841
3,893
---
3/1/25
---
$76.25
73,733
-5.0
D
---
3/3/25 - 7:10:51 pm
7
    
 
SAINT FREDERICK G
PR
JS
$629,215
8,252
---
3/1/25
---
$76.25
369,539
-2.2
D
---
3/3/25 - 7:10:41 pm
8
    
 
CANN CYNTHIA CAMMETT
CAO
JS
$61,991
813
---
3/1/25
---
$76.25
32,217
-2.5
D
---
3/3/25 - 7:10:31 pm
9
    
 
BOXER GENE
GC,SEC
JS
$277,855
3,644
---
3/1/25
---
$76.25
66,561
-5.2
D
---
3/3/25 - 7:10:21 pm
10
    
 
FLORANCE ANDREW C
PR,CEO,DIR
JS
$3,148,820
41,296
---
3/1/25
---
$76.25
1,596,600
-2.5
D
---
3/3/25 - 7:10:11 pm
11
    
 
SIMURO FRANK
CTO
JS
$947,940
12,432
---
3/1/25
---
$76.25
489,299
-2.5
D
---
3/3/25 - 7:10:01 pm
12
    
 
DESMARAIS MICHAEL J
HR
JB
---
18,828
---
2/27/25
---
---
77,626
32.0
D
---
3/3/25 - 7:10:51 pm
13
    
 
CANN CYNTHIA CAMMETT
CAO
JB
---
4,035
---
2/27/25
---
---
33,030
13.9
D
---
3/3/25 - 7:10:31 pm
14
    
 
BOXER GENE
GC,SEC
JB
---
26,897
---
2/27/25
---
---
70,205
62.1
D
---
3/3/25 - 7:10:21 pm
15
    
 
LOWN CHRISTIAN M
CFO
JB
---
97,600
---
2/20/25
---
---
134,823
262.2
D
R
2/24/25 - 6:48:59 pm
16
    
 
FLORANCE ANDREW C
PR,CEO,DIR
JB
---
451,440
---
2/20/25
---
---
1,637,896
38.0
D
R
2/24/25 - 6:48:48 pm
17
    
 
RUGGLES LISA
VP,OO
JB
---
65,440
---
2/20/25
---
---
220,581
42.2
D
R
2/24/25 - 6:48:39 pm
18
    
 
SIMURO FRANK
CTO
JB
---
130,640
---
2/20/25
---
---
501,731
35.2
D
R
2/24/25 - 6:48:28 pm
19
    
 
SAINT FREDERICK G
PR
JB
---
97,600
---
2/20/25
---
---
377,791
34.8
D
R
2/24/25 - 6:48:18 pm
20
    
 
SIMURO FRANK
CTO
JS
$406,219
5,485
---
2/15/25
---
$74.06
385,019
-1.4
D
---
2/19/25 - 4:57:12 pm
21
    
 
RUGGLES LISA
VP,OO
JS
$261,506
3,531
---
2/15/25
---
$74.06
169,074
-2.0
D
---
2/19/25 - 4:57:02 pm
22
    
 
FLORANCE ANDREW C
PR,CEO,DIR
JS
$1,054,244
14,235
---
2/15/25
---
$74.06
1,248,863
-1.1
D
---
2/19/25 - 4:56:50 pm
23
    
 
SAINT FREDERICK G
PR
JS
$173,967
2,349
---
2/15/25
---
$74.06
293,245
-0.8
D
---
2/19/25 - 4:56:40 pm
24
    
 
FLORANCE ANDREW C
PR,CEO,DIR
JS
$2,455,351
62,407
---
2/13/25
---
$73.27
1,186,456
-5.0
D
R
2/24/25 - 6:48:48 pm
25
    
 
RUGGLES LISA
VP,OO
JS
$548,133
13,933
---
2/13/25
---
$73.27
155,141
-8.2
D
R
2/24/25 - 6:48:39 pm
26
    
 
SIMURO FRANK
CTO
JS
$547,767
13,928
---
2/13/25
---
$73.27
371,091
-3.6
D
R
2/24/25 - 6:48:28 pm
27
    
 
SAINT FREDERICK G
PR
JS
$483,729
13,054
---
2/13/25
---
$73.27
280,191
-4.5
D
R
2/24/25 - 6:48:18 pm
28
1y
12
42%
20%
2
HILL JOHN W
DIR
S
$209,939
2,735
---
12/10/24
---
$76.76
17,499
-13.5
D
---
12/12/24 - 4:16:28 pm
29
    
 
HILL JOHN W
DIR
JS
---
195
---
12/10/24
---
---
17,304
-1.1
D
---
12/12/24 - 4:16:28 pm
30
    
 
KLEIN MICHAEL R
DIR
JS
---
64,909
---
12/10/24
---
---
1,848,592
-3.4
D
---
12/12/24 - 4:16:17 pm
31
1y
6
33%
25%
3
NASSETTA CHRISTOPHER J
DIR
S
$135,136
1,681
---
11/27/24
---
$80.39
229,715
-0.7
D
---
12/2/24 - 4:55:38 pm
32
    
 
DESMARAIS MICHAEL J
HR
S
$439,340
5,500
---
11/26/24
---
$79.88
58,798
-8.6
D
---
11/27/24 - 6:33:50 pm
33
1y
12
33%
24%
2
KLEIN MICHAEL R
DIR
S
$5,350,269
71,633
---
10/25/24
---
$74.69
1,913,501
-3.6
D
---
10/28/24 - 5:14:32 pm
34
    
 
KLEIN MICHAEL R
DIR
JS
---
5,872
---
10/25/24
---
---
1,985,134
-0.3
D
---
10/28/24 - 5:14:32 pm
35
1y
6
50%
22%
2
FLORANCE ANDREW C
PR,CEO,DIR
B
$1,099,966
14,731
---
10/25/24
---
$74.67
1,263,098
1.2
D
---
10/28/24 - 5:13:24 pm
36
1y
12
42%
20%
2
HILL JOHN W
DIR
S
$103,562
1,325
---
7/30/24
---
$78.16
16,545
-7.4
D
---
8/1/24 - 4:13:53 pm
37
    
 
KLEIN MICHAEL R
DIR
JS
---
16,500
---
7/27/24
---
---
1,987,225
-0.8
D
---
7/30/24 - 4:11:57 pm
38
    
 
CANN CYNTHIA CAMMETT
CAO
JB
---
9,553
---
7/26/24
---
---
28,995
49.1
D
---
7/30/24 - 4:12:19 pm
39
    
 
SAINT FREDERICK G
PR
JB
---
12,738
---
7/26/24
---
---
295,594
4.5
D
---
7/30/24 - 4:12:08 pm
40
    
 
KLEIN MICHAEL R
DIR
JB
---
3,781
---
7/17/24
---
---
1,991,006
0.2
D
---
8/5/24 - 4:14:12 pm
41
    
 
BRUNNER ANGELIQUE G
DIR
JB
---
3,491
---
7/17/24
---
---
7,023
98.8
D
---
8/5/24 - 4:14:01 pm
42
    
 
SAMS LOUISE S
DIR
JB
---
3,491
---
7/17/24
---
---
16,118
27.6
D
---
8/5/24 - 4:13:51 pm
43
    
 
MUSSLEWHITE ROBERT W
DIR
JB
---
3,293
---
7/17/24
---
---
15,156
27.8
D
---
8/5/24 - 4:13:41 pm
44
    
 
KAPLAN LAURA COX
DIR
JB
---
3,452
---
7/17/24
---
---
17,835
24.0
D
---
8/5/24 - 4:13:30 pm
45
    
 
HILL JOHN W
DIR
JB
---
3,689
---
7/17/24
---
---
20,234
22.3
D
---
8/5/24 - 4:13:19 pm
46
    
 
NASSETTA CHRISTOPHER J
DIR
JB
---
3,781
---
7/17/24
---
---
231,396
1.7
D
---
8/5/24 - 4:12:58 pm
47
    
 
CANN CYNTHIA CAMMETT
CAO
3
---
---
---
7/8/24
---
---
19,442
---
D
---
7/18/24 - 4:07:09 pm
48
    
 
LOWN CHRISTIAN M
CFO
JB
---
33,839
---
7/1/24
---
---
33,839
New
D
---
7/3/24 - 4:12:12 pm
49
    
 
LOWN CHRISTIAN M
CFO
3
---
---
---
7/1/24
---
---
---
---
D
---
7/3/24 - 4:10:37 pm
50
    
 
RUGGLES LISA
VP,OO
JS
$860
11
---
6/1/24
---
$78.17
172,605
-0.0
D
---
6/4/24 - 4:11:59 pm
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