CoStar Group, Inc.

Historical 13F Holders

Symbol
CSGP
CUSIP
22160N109
All holders as of
Q2 2026
Type
Equity
Class
COM
Reported Value, Excluding Options
Total Filings

13D/G Filers

Investors who own more than 5% of a class must file a Schedule 13D or 13G. Each filer's latest filing for 22160N109 since 12/18/2024, largest first.

Filer % of Class Filed
Vanguard Portfolio Management LLC 13G 9.1% 4/29/2026
Event 3/31/2026
Vanguard Capital Management LLC 13G 7.5% 4/29/2026
Event 3/31/2026
BlackRock, Inc. 13G/A 7.5% 4/23/2025
Event 3/31/2025
Bamco Inc /NY/ 13G
5.3% 8/14/2026
Event 6/30/2026
Under 5%, checked the "5 percent or less" box, or amended by a later filing (1)
Vanguard Group Inc 13G/A 0% 3/26/2026
Event 3/13/2026

13F Holders by Quarter

Period Filings Shares, Excl. Options Value, Excl. Options
2026 Q3 51 3.50 M $95.8 M
2026 Q2 802 433 M $13.0 B
2026 Q1 838 416 M $16.8 B
2025 Q4 901 426 M $28.6 B
2025 Q3 961 417 M $35.1 B
2025 Q2 922 427 M $34.4 B
2025 Q1 905 430 M $34.1 B
2024 Q4 847 410 M $29.3 B
2024 Q3 816 401 M $30.2 B
2024 Q2 812 400 M $29.7 B
2024 Q1 802 416 M $40.1 B
2023 Q4 775 401 M $35.0 B
2023 Q3 724 393 M $30.2 B
2023 Q2 753 401 M $35.6 B
2023 Q1 725 392 M $26.9 B
2022 Q4 735 410 M $31.7 B
2022 Q3 664 417 M $29.1 B
2022 Q2 616 383 M $23.2 B
2022 Q1 620 379 M $25.2 B
2021 Q4 662 383 M $30.2 B
2021 Q3 617 376 M $32.3 B
2021 Q2 633 375 M $31.1 B
2021 Q1 622 38.0 M $31.2 B
2020 Q4 640 38.7 M $35.9 B
2020 Q3 597 37.9 M $32.1 B
2020 Q2 576 37.8 M $26.9 B
2020 Q1 527 35.6 M $20.9 B
2019 Q4 506 35.3 M $21.1 B
2019 Q3 502 34.8 M $20.7 B
2019 Q2 468 35.4 M $19.5 B
2019 Q1 449 35.7 M $16.6 B
2018 Q4 398 35.7 M $12.1 B
2018 Q3 422 36.5 M $15.3 B
2018 Q2 393 36.2 M $15.0 B
2018 Q1 374 35.7 M $12.9 B
2017 Q4 352 36.2 M $10.8 B
2017 Q3 343 36.1 M $9.69 B
2017 Q2 304 32.6 M $8.60 B
2017 Q1 290 33.0 M $6.85 B
2016 Q4 297 33.4 M $6.30 B
2016 Q3 248 33.1 M $7.16 B
2016 Q2 255 33.9 M $7.36 B
2016 Q1 233 34.2 M $6.44 B
2015 Q4 228 34.4 M $7.12 B
2015 Q3 228 35.4 M $6.13 B
2015 Q2 220 33.1 M $6.67 B
2015 Q1 222 33.9 M $6.71 B
2014 Q4 222 34.0 M $6.24 B
2014 Q3 215 33.3 M $5.18 B
2014 Q2 246 32.5 M $5.16 B
2014 Q1 248 27.9 M $5.22 B