CoStar Group, Inc.
MX ˙ BMV ˙ US22160N1090
TEN SYMBOL NIE JEST JUŻ AKTYWNY
SecurityMX:CSGP / CoStar Group, Inc.
InstitutionGeode Capital Management, Llc
Latest Disclosed Ownership12,448,652 shares
Latest Disclosed Value $ 500,449,270
Geode Capital Management, Llc reports 2.19% increase in ownership of CSGP / CoStar Group, Inc.

On May 15, 2026 - Geode Capital Management, Llc filed a 13F-HR form disclosing ownership of 12,448,652 shares of CoStar Group, Inc. (MX:CSGP) valued at $500,449,270 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 12,182,167 shares of CoStar Group, Inc.. This represents a change in shares of 2.19% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F COSTAR GROUP COM 22160N109 12,448,652 266,485 2.19 500,449 -38.69 0.0166
2026-02-09 2025-12-31 13F COSTAR GROUP COM 22160N109 12,182,167 -419,288 -3.33 816,237 -22.95 0.0504
2025-11-12 2025-09-30 13F COSTAR GROUP COM 22160N109 12,601,455 243,615 1.97 1,059,386 7.02 0.0676
2025-08-08 2025-06-30 13F COSTAR GROUP COM 22160N109 12,357,840 290,404 2.41 989,905 3.83 0.0694
2025-05-13 2025-03-31 13F COSTAR GROUP COM 22160N109 12,067,436 591,681 5.16 953,408 16.31 0.0750
2025-02-12 2024-12-31 13F COSTAR GROUP COM 22160N109 11,475,755 166,769 1.47 819,678 -3.64 0.0635
2024-11-12 2024-09-30 13F COSTAR GROUP COM 22160N109 11,308,986 236,407 2.14 850,656 3.86 0.0689
2024-08-09 2024-06-30 13F COSTAR GROUP COM 22160N109 11,072,579 230,768 2.13 819,017 -21.62 0.0719
2024-05-13 2024-03-31 13F COSTAR GROUP COM 22160N109 10,841,811 391,366 3.74 1,044,966 14.68 0.0966
2024-02-13 2023-12-31 13F COSTAR GROUP COM 22160N109 10,450,445 178,942 1.74 911,163 15.59 0.0953
2023-11-13 2023-09-30 13F COSTAR GROUP COM 22160N109 10,271,503 -627,559 -5.76 788,304 -18.56 0.0939
2023-08-11 2023-06-30 13F COSTAR GROUP COM 22160N109 10,899,062 1,085,038 11.06 968,002 43.54 0.1138
2023-05-15 2023-03-31 13F COSTAR GROUP COM 22160N109 9,814,024 500,775 5.38 674,381 93,824.79 0.0876
2023-02-13 2022-12-31 13F COSTAR GROUP COM 22160N109 9,313,249 415,176 4.67 719 -99.88 0.1008
2022-11-14 2022-09-30 13F COSTAR GROUP COM 22160N109 8,898,073 2,578,917 40.81 619,104 62.34 0.0939
2022-08-12 2022-06-30 13F COSTAR GROUP COM 22160N109 6,319,156 916,498 16.96 381,371 6.13 0.0559
2022-05-13 2022-03-31 13F COSTAR GROUP COM 22160N109 5,402,658 1,034 0.02 359,347 -15.71 0.0449
2022-02-11 2021-12-31 13F COSTAR GROUP COM 22160N109 5,401,624 447,790 9.04 426,313 0.15 0.0513
2021-11-12 2021-09-30 13F COSTAR GROUP COM 22160N109 4,953,834 14,099 0.29 425,665 4.20 0.0573
2021-08-13 2021-06-30 13F COSTAR GROUP COM 22160N109 4,939,735 4,464,515 939.46 408,498 4.73 0.0563
2021-05-12 2021-03-31 13F COSTAR GROUP COM 22160N109 475,220 26,531 5.91 390,033 -5.83 0.0597
2021-02-12 2020-12-31 13F COSTAR GROUP COM 22160N109 448,689 21,352 5.00 414,177 14.34 0.0695
2020-11-13 2020-09-30 13F COSTAR GROUP COM 22160N109 427,337 -18,400 -4.13 362,233 14.45 0.0710
2020-08-13 2020-06-30 13F COSTAR GROUP COM 22160N109 445,737 21,771 5.14 316,501 27.24 0.0677
2020-05-14 2020-03-31 13F COSTAR GROUP COM 22160N109 423,966 6,458 1.55 248,750 -0.33 0.0648
2020-02-20 2019-12-31 13F/A-1 COSTAR GROUP COM 22160N109 417,508 8,993 2.20 249,574 3.06 0.0522
2020-02-13 2019-12-31 13F COSTAR GROUP COM 22160N109 417,508 8,993 249,574 31,806.0180
2019-11-12 2019-09-30 13F COSTAR GROUP COM 22160N109 408,515 25,713 6.72 242,170 14.26 0.0565
2019-08-14 2019-06-30 13F COSTAR GROUP COM 22160N109 382,802 29,450 8.33 211,948 28.70 0.0513
2019-05-14 2019-03-31 13F COSTAR GROUP COM 22160N109 353,352 18,050 5.38 164,679 45.70 0.0427
2019-03-06 2018-12-31 13F/A-1 COSTAR GROUP COM 22160N109 335,302 4,060 1.23 113,029 -18.86 0.0349
2019-02-13 2018-12-31 13F COSTAR GROUP COM 22160N109 335,302 4,060 113,029
2018-11-13 2018-09-30 13F COSTAR GROUP COM 22160N109 331,242 17,042 5.42 139,297 7.52 0.0393
2018-08-14 2018-06-30 13F COSTAR GROUP COM 22160N109 314,200 -9,053 -2.80 129,551 10.60 0.0398
2018-05-15 2018-03-31 13F COSTAR GROUP COM 22160N109 323,253 7,868 2.49 117,133 25.14 0.0382
2018-02-13 2017-12-31 13F COSTAR GROUP COM 22160N109 315,385 37,973 13.69 93,605 25.86 0.0318
2017-11-14 2017-09-30 13F COSTAR GROUP COM 22160N109 277,412 10,108 3.78 74,374 5.61 0.0275
2017-08-14 2017-06-30 13F COSTAR GROUP COM 22160N109 267,304 14,150 5.59 70,424 34.29 0.0277
2017-06-21 2017-03-31 13F/A-1 COSTAR GROUP INC COM COM 22160N109 253,154 17,298 7.33 52,440 18.00 0.0215
2017-05-12 2017-03-31 13F COSTAR GROUP INC COM COM 22160N109 253,154 52,440
2017-02-14 2016-12-31 13F COSTAR GROUP INC COM COM 22160N109 235,856 15,090 6.84 44,441 -7.03 0.0207
2016-11-10 2016-09-30 13F COSTAR GROUP INC COM COM 22160N109 220,766 5,557 2.58 47,802 1.58 0.0241
2016-08-12 2016-06-30 13F COSTAR GROUP INC COM COM 22160N109 215,209 10,345 5.05 47,057 22.07 0.0256
2016-05-13 2016-03-31 13F COSTAR GROUP INC COM COM 22160N109 204,864 7,763 3.94 38,549 -5.37 0.0205
2016-02-12 2015-12-31 13F COSTAR GROUP INC COM COM 22160N109 197,101 -528 -0.27 40,738 19.12 0.0232
2015-11-13 2015-09-30 13F COSTAR GROUP INC COM COM 22160N109 197,629 6,558 3.43 34,200 -11.06 0.0207
2015-08-14 2015-06-30 13F COSTAR GROUP INC COM COM 22160N109 191,071 3,347 1.78 38,454 3.55 0.0220
2015-05-14 2015-03-31 13F COSTAR GROUP INC COM COM 22160N109 187,724 12,436 7.09 37,137 15.38 0.0212
2015-02-12 2014-12-31 13F COSTAR GROUP INC COM COM 22160N109 175,288 11,344 6.92 32,188 26.23 0.0191
2014-11-14 2014-09-30 13F COSTAR GROUP INC COM COM 22160N109 163,944 2,974 1.85 25,499 0.15 0.0165
2014-08-13 2014-06-30 13F COSTAR GROUP INC COM COM 22160N109 160,970 5,949 3.84 25,460 -12.05 0.0165
2014-05-14 2014-03-31 13F COSTAR GROUP INC COM COM 22160N109 155,021 9,339 6.41 28,948 7.66 0.0194
2014-02-14 2013-12-31 13F COSTAR GROUP INC COM COM 22160N109 145,682 10,916 8.10 26,889 18.84 0.0186
2013-11-14 2013-09-30 13F COSTAR GROUP INC COM COM 22160N109 134,766 16,458 13.91 22,627 48.18 0.0181
2013-08-14 2013-06-30 13F COSTAR GROUP INC COM COM 22160N109 118,308 118,308 15,270 0.0134
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.