CoStar Group, Inc. (CSGP) - Insider Holders & Insider Ownership

List of insiders holdings for CoStar Group, Inc.:
  1. Shares directly owned by the insider.
  2. Shares indirectly owned by the insider.
  3. Total shares owned by the insider (sum of shares directly and indirectly owned).
  4. Total market value if available.
  5. Shares are not adjusted for stock split.
"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
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#Insider Holder NameReport
Date Time		Shares Owned
Directly
Indirectly		Total
Shares Owned		Filing
1KLEIN MICHAEL R
Director		2024-12-12 16:16:171,848,592
0		1,848,592Form 4
2FLORANCE ANDREW C
Founder and CEO		2026-08-05 09:27:001,806,165
0		1,806,165Form 4
3SIMURO FRANK
Chief Technology Officer		2026-03-17 16:12:32414,491
0		414,491Form 4
4Wheeler Scott T
Chief Financial Officer		2024-04-30 16:13:35328,651
5,701		334,352Form 4
5BONDERMAN DAVID
Director		2014-09-15 17:41:07294,277
0		294,277Form 4
6SAINT FREDERICK G.
President, Marketplaces		2026-08-04 17:24:37278,415
0		278,415Form 4
7NASSETTA CHRISTOPHER J
Director		2024-12-02 16:55:38229,715
46,000		275,715Form 4
8Ruggles Lisa
Senior VP, Global Operations		2026-03-17 16:12:44174,915
0		174,915Form 4
9LOWN CHRISTIAN M.
Chief Financial Officer		2026-07-06 16:05:32129,653
0		129,653Form 4
10HABER WARREN H
Director		2018-09-24 16:28:08121,049
0		121,049Form 4
11Glosserman Michael J
Director		2023-11-01 16:13:10101,465
0		101,465Form 4
12Boxer Gene
General Counsel and Secretary		2026-03-17 17:47:5895,463
0		95,463Form 4/A
13ARABE MICHAEL D
Sen. VP- Sales & Cust. Service		2004-03-02 19:00:3889,912
1,500		91,412Form 4
14DESMARAIS MICHAEL J
Chief Human Resources Officer		2026-03-17 16:12:1687,725
0		87,725Form 4
15Radecki Brian J
Chief Financial Officer		2015-03-13 17:07:5445,973
0		45,973Form 4
16Rossmann Robin Jack
Chief Financial Officer		2026-08-04 17:24:4734,771
0		34,771Form 4
17Sams Louise S
Director		2026-06-24 21:13:3328,671
0		28,671Form 4
18SCHAFFEL DAVID M
Chief Information Officer		2005-03-14 17:09:5928,635
0		28,635Form 4
19Marples Paul
Managing Director, CoStar UK
Director		2012-08-01 17:35:2428,632
0		28,632Form 4
20Musslewhite Robert W
Director		2026-06-24 21:13:3926,539
0		26,539Form 4
21Hill John W
Director		2026-08-10 16:06:3322,993
0		22,993Form 4
22Kitchen Jennifer
Sr. Vice President, Research		2013-09-11 16:55:4022,220
0		22,220Form 4
23LOW JOSIAH O III
Director		2010-09-07 16:45:4320,705
0		20,705Form 4
24Stanfill John L
Sr. VP-Sales, Customer Service		2014-03-12 17:50:0620,105
0		20,105Form 4
25Linnington Matthew
Executive VP, Sales		2020-08-13 16:31:3119,766
0		19,766Form 4
26Cann Cynthia Cammett
Chief Accounting Officer		2026-08-10 16:06:4118,822
0		18,822Form 4
27Brunner Angelique G.
Director		2026-06-24 21:13:4518,428
0		18,428Form 4
28Kaplan Laura Cox
Director		2024-08-05 16:13:3017,835
0		17,835Form 4
29Glaser Rachel C
Director		2026-06-24 21:14:0312,419
0		12,419Form 4
30McCarthy Christine M
Director		2026-06-24 21:12:4211,585
0		11,585Form 4
31BERISFORD JOHN L
Director		2026-06-24 21:13:5711,235
0		11,235Form 4
32Tully Christopher
Sr. VP-Sales, Customer Service		2008-05-29 11:30:4610,682
0		10,682Form 4
33CARCHEDI FRANCIS
Executive VP, Corp. Dev.		2018-10-02 16:17:566,540
0		6,540Form 4
34Steinberg David Jay
Director		2020-03-05 16:46:366,456
0		6,456Form 4
35FARRINGTON CRAIG
Vice President, Research		2007-05-01 16:27:066,307
0		6,307Form 4
36Reynolds Catherine B
Director		2007-09-18 16:16:445,736
0		5,736Form 4
37Yinger Scott L
Interim CFO		2015-08-11 17:23:234,583
0		4,583Form 3
38Banerjee Nana
Director		2026-03-17 16:12:220
0		0Form 3