CSGP
COSTAR GROUP, INC.
Services-Business Services, NECNasdaqLarge accelerated filer
Total Trades
40
Buys
4
Sells
33
Largest Trade
$1M+
Insiders
11
Institutional Funds
731
Inst. Value
$1M+
Activist Filings
8
Insider Trades
| Insider | Title | Type | Value | Shares | Price | Date |
|---|---|---|---|---|---|---|
| Glaser Rachel C | Director | BUY | $15K–$50K | 1K | $44.94 | Mar 3, 2026 |
| SAINT FREDERICK G. | President | BUY | $500K+ | 20K | $45.33 | Mar 3, 2026 |
| FLORANCE ANDREW C | President and CEO | BUY | $1M+ | 56K | $44.52 | Mar 2, 2026 |
| Hill John W | Director | SELL | $100K–$500K | 2K | $68.68 | Nov 17, 2025 |
| Cann Cynthia Cammett | Chief Accounting O… | SELL | $100K–$500K | 2K | $68.79 | Nov 17, 2025 |
| SAINT FREDERICK G. | President | SELL | $1M+ | 25K | $90.33 | Sep 2, 2025 |
| SAINT FREDERICK G. | President | SELL | $1M+ | 25K | $93.23 | Jul 29, 2025 |
| Cann Cynthia Cammett | Chief Accounting O… | SELL | $100K–$500K | 2K | $92.85 | Jul 29, 2025 |
| SAINT FREDERICK G. | President | SELL | $1M+ | 25K | $81.10 | Jun 12, 2025 |
| Cann Cynthia Cammett | Chief Accounting O… | SELL | $100K–$500K | 4K | $78.48 | Mar 14, 2025 |
| NASSETTA CHRISTOPHER J | Director | SELL | $100K–$500K | 2K | $80.39 | Dec 2, 2024 |
| DESMARAIS MICHAEL J | CHRO | SELL | $100K–$500K | 6K | $79.88 | Nov 27, 2024 |
| KLEIN MICHAEL R | Director | SELL | $1M+ | 72K | $74.69 | Oct 28, 2024 |
| FLORANCE ANDREW C | President and CEO | BUY | $1M+ | 15K | $74.67 | Oct 28, 2024 |
| Hill John W | Director | SELL | $100K–$500K | 1K | $78.16 | Aug 1, 2024 |
| DESMARAIS MICHAEL J | CHRO | SELL | $100K–$500K | 4K | $92.67 | Apr 30, 2024 |
| Wheeler Scott T | CFO | SELL | $1M+ | 123K | $92.61 | Apr 30, 2024 |
| Wheeler Scott T | CFO | EXERCISE | $1M+ | 123K | $58.03 | Apr 30, 2024 |
| Hill John W | Director | SELL | $100K–$500K | 3K | $84.07 | Nov 29, 2023 |
| NASSETTA CHRISTOPHER J | Director | SELL | $100K–$500K | 2K | $77.86 | Nov 9, 2023 |
| Wheeler Scott T | CFO | SELL | $1M+ | 22K | $89.30 | Jun 30, 2023 |
| Ruggles Lisa | Senior VP | SELL | $1M+ | 30K | $91.42 | Jun 30, 2023 |
| SIMURO FRANK | CTO | SELL | $1M+ | 92K | $89.65 | Jun 28, 2023 |
| Hill John W | Director | SELL | $100K–$500K | 2K | $86.57 | Jun 28, 2023 |
| Wheeler Scott T | CFO | SELL | $1M+ | 25K | $80.68 | Jun 14, 2023 |
| SAINT FREDERICK G. | President | SELL | $1M+ | 30K | $80.24 | Jun 9, 2023 |
| FLORANCE ANDREW C | President and CEO | EXERCISE | $1M+ | 361K | $18.28 | May 2, 2023 |
| FLORANCE ANDREW C | President and CEO | SELL | $1M+ | 361K | $76.77 | May 2, 2023 |
| Hill John W | Director | SELL | $100K–$500K | 2K | $68.50 | Apr 4, 2023 |
| DESMARAIS MICHAEL J | CHRO | SELL | $100K–$500K | 6K | $70.36 | Mar 9, 2023 |
| SIMURO FRANK | CTO | SELL | $1M+ | 35K | $70.09 | Mar 3, 2023 |
| SIMURO FRANK | CTO | EXERCISE | $100K–$500K | 35K | $10.22 | Mar 3, 2023 |
| Hill John W | Director | SELL | $100K–$500K | 4K | $78.92 | Nov 4, 2022 |
| DESMARAIS MICHAEL J | CHRO | SELL | $100K–$500K | 1K | $82.81 | Oct 31, 2022 |
| Hill John W | Director | SELL | $100K–$500K | 1K | $74.49 | Aug 11, 2022 |
| KLEIN MICHAEL R | Director | SELL | $1M+ | 150K | $72.42 | Aug 9, 2022 |
| DESMARAIS MICHAEL J | CHRO | SELL | $100K–$500K | 2K | $72.51 | Aug 5, 2022 |
| Hill John W | Director | SELL | $50K–$100K | 2K | $57.07 | May 26, 2022 |
| DESMARAIS MICHAEL J | CHRO | SELL | $50K–$100K | 1K | $63.14 | May 4, 2022 |
| Ruggles Lisa | Senior VP | SELL | $1M+ | 22K | $59.88 | Mar 3, 2022 |
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Institutional Ownership
13F filings as of Dec 31, 2025 · 731 funds holding
| Fund | Shares | Value | Type |
|---|---|---|---|
| STATE STREET CORP | 18.6M | $1M+ | SH |
| GEODE CAPITAL MANAGEMENT, LLC | 10.9M | $1M+ | SH |
| Capital International Investors | 10.8M | $1M+ | SH |
| AKRE CAPITAL MANAGEMENT LLC | 9.6M | $1M+ | SH |
| NORGES BANK | 7.1M | $1M+ | SH |
| Capital Research Global Investors | 5.6M | $1M+ | SH |
| POLEN CAPITAL MANAGEMENT LLC | 4.9M | $1M+ | SH |
| Vulcan Value Partners, LLC | 4.5M | $1M+ | SH |
| MIZUHO MARKETS AMERICAS LLC | 4.4M | $1M+ | SH |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | 3.9M | $1M+ | SH |
| Third Point LLC | 3.2M | $1M+ | SH |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 2.7M | $1M+ | SH |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 2.5M | $1M+ | SH |
| BECK MACK & OLIVER LLC | 2.2M | $1M+ | SH |
| BNP Paribas Asset Management Holding S.A. | 2.1M | $1M+ | SH |
| BARCLAYS PLC | 2.1M | $1M+ | SH |
| DF DENT & CO INC | 2.0M | $1M+ | SH |
| RGM Capital, LLC | 2.0M | $1M+ | SH |
| DIMENSIONAL FUND ADVISORS LP | 1.9M | $1M+ | SH |
| MACKENZIE FINANCIAL CORP | 1.7M | $1M+ | SH |
Activist & 5%+ Owners
SC 13D/13G filings — investors holding 5%+ of outstanding shares
SC 13G/A · Apr 24, 2025
7.5%
31.8M shares
The Vanguard Group - 23-1945930
SC 13G/A · Feb 13, 2024
15.9%
64.9M shares
SC 13G/A · Jan 25, 2024
8.9%
36.5M shares
T. ROWE PRICE ASSOCIATES, INC. 52-0556948
SC 13G/A · Feb 14, 2023
1.6%
6.7M shares
SC 13G/A · Jan 30, 2023
7.8%
31.6M shares
The Vanguard Group - 23-1945930
SC 13G/A · Oct 11, 2022
10.6%
43.0M shares
T. ROWE PRICE ASSOCIATES, INC. 52-0556948
SC 13G/A · Feb 14, 2022
6.9%
27.7M shares
SC 13G/A · Feb 1, 2022
6.1%
23.9M shares