CoStar Group, Inc.
MX ˙ BMV ˙ US22160N1090
DETTE SYMBOL ER IKKE LÆNGERE AKTIVT
SecurityMX:CSGP / CoStar Group, Inc.
InstitutionEagleClaw Capital Managment, LLC
Latest Disclosed Ownership33,750 shares
Latest Disclosed Value $ 1,361,475
EagleClaw Capital Managment, LLC reports 1.17% decrease in ownership of CSGP / CoStar Group, Inc.

On May 8, 2026 - EagleClaw Capital Managment, LLC filed a 13F-HR form disclosing ownership of 33,750 shares of CoStar Group, Inc. (MX:CSGP) valued at $1,361,475 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 34,150 shares of CoStar Group, Inc.. This represents a change in shares of -1.17% 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)
2026-05-08 2026-03-31 13F COSTAR GROUP COM 22160N109 33,750 -400 -1.17 1,361 -40.72 0.1906
2026-02-10 2025-12-31 13F COSTAR GROUP COM 22160N109 34,150 300 0.89 2,296 -19.58 0.3322
2025-11-14 2025-09-30 13F COSTAR GROUP COM 22160N109 33,850 19,550 136.71 2,856 148.48 0.3995
2025-08-08 2025-06-30 13F COSTAR GROUP COM 22160N109 14,300 -150 -1.04 1,150 0.44 0.1717
2025-05-08 2025-03-31 13F COSTAR GROUP COM 22160N109 14,450 -1,150 -7.37 1,145 2.51 0.1800
2025-02-07 2024-12-31 13F COSTAR GROUP COM 22160N109 15,600 0 0.00 1,117 -5.10 0.1770
2024-11-08 2024-09-30 13F COSTAR GROUP COM 22160N109 15,600 1,500 10.64 1,177 12.54 0.1969
2024-08-09 2024-06-30 13F COSTAR GROUP COM 22160N109 14,100 0 0.00 1,045 -23.27 0.1881
2024-05-13 2024-03-31 13F COSTAR GROUP COM 22160N109 14,100 -600 -4.08 1,362 6.07 0.2467
2024-02-14 2023-12-31 13F COSTAR GROUP COM 22160N109 14,700 0 0.00 1,285 13.63 0.2676
2023-11-08 2023-09-30 13F COSTAR GROUP COM 22160N109 14,700 0 0.00 1,130 -13.61 0.2566
2023-08-10 2023-06-30 13F COSTAR GROUP COM 22160N109 14,700 -750 -4.85 1,308 23.05 0.3009
2023-05-05 2023-03-31 13F COSTAR GROUP COM 22160N109 15,450 -1,460 -8.63 1,064 -18.61 0.2508
2023-02-10 2022-12-31 13F/A-1 COSTAR GROUP COM 22160N109 16,910 850 5.29 1,307 16.71 0.3160
2023-02-07 2022-12-31 13F COSTAR GROUP COM 22160N109 17,310 1,250 1,368 0.3128
2022-11-08 2022-09-30 13F COSTAR GROUP COM 22160N109 16,060 -1,250 -7.22 1,119 6.98 0.3130
2022-08-08 2022-06-30 13F COSTAR GROUP COM 22160N109 17,310 0 0.00 1,046 -9.28 0.2837
2022-05-13 2022-03-31 13F COSTAR GROUP COM 22160N109 17,310 0 0.00 1,153 -15.72 0.2649
2022-02-14 2021-12-31 13F COSTAR GROUP COM 22160N109 17,310 800 4.85 1,368 -3.66 0.2998
2021-12-02 2021-09-30 13F/A-1 COSTAR GROUP COM 22160N109 16,510 -100 -0.60 1,420 3.20 0.3659
2021-11-05 2021-09-30 13F COSTAR GROUP COM 22160N109 16,510 -100 1,421 0.3662
2021-08-10 2021-06-30 13F COSTAR GROUP COM 22160N109 16,610 14,999 931.04 1,376 3.93 0.3559
2021-05-12 2021-03-31 13F COSTAR GROUP COM 22160N109 1,611 25 1.58 1,324 -9.75 0.3805
2021-02-11 2020-12-31 13F COSTAR GROUP COM 22160N109 1,586 -25 -1.55 1,467 7.32 0.4666
2020-11-09 2020-09-30 13F COSTAR GROUP COM 22160N109 1,611 -150 -8.52 1,367 9.27 0.4790
2020-08-13 2020-06-30 13F COSTAR GROUP COM 22160N109 1,761 -10 -0.56 1,251 20.17 0.4858
2020-05-08 2020-03-31 13F COSTAR GROUP COM 22160N109 1,771 -50 -2.75 1,041 -4.58 0.4915
2020-01-27 2019-12-31 13F COSTAR GROUP COM 22160N109 1,821 -154 -7.80 1,091 -6.99 0.3991
2019-10-22 2019-09-30 13F COSTAR GROUP COM 22160N109 1,975 -50 -2.47 1,173 4.45 0.4781
2019-07-18 2019-06-30 13F COSTAR GROUP COM 22160N109 2,025 -25 -1.22 1,123 17.59 0.4887
2019-05-01 2019-03-31 13F COSTAR GROUP COM 22160N109 2,050 -125 -5.75 955 30.46 0.4359
2019-02-13 2018-12-31 13F COSTAR GROUP COM 22160N109 2,175 -150 -6.45 732 -25.23 0.3838
2018-11-14 2018-09-30 13F COSTAR GROUP COM 22160N109 2,325 -250 -9.71 979 -7.99 0.4286
2018-08-14 2018-06-30 13F COSTAR GROUP COM 22160N109 2,575 -75 -2.83 1,064 10.49 0.5162
2018-05-18 2018-03-31 13F COSTAR GROUP COM 22160N109 2,650 -175 -6.19 963 14.92 0.4875
2018-02-13 2017-12-31 13F COSTAR GROUP COM 22160N109 2,825 1,000 54.79 838 71.02 0.4228
2017-11-16 2017-09-30 13F COSTAR GROUP COM 22160N109 1,825 -175 -8.75 490 -7.02 0.2772
2017-08-15 2017-06-30 13F COSTAR GROUP COM 22160N109 2,000 0 0.00 527 26.99 0.3091
2017-05-15 2017-03-31 13F COSTAR GROUP COM 22160N109 2,000 0 0.00 415 10.08 0.2500
2017-02-13 2016-12-31 13F COSTAR GROUP COM 22160N109 2,000 0 0.00 377 -12.93 0.2376
2016-11-14 2016-09-30 13F COSTAR GROUP COM 22160N109 2,000 -50 -2.44 433 -3.56 0.2768
2016-08-08 2016-06-30 13F COSTAR GROUP COM 22160N109 2,050 0 0.00 449 16.32 0.2987
2016-05-09 2016-03-31 13F COSTAR GROUP COM 22160N109 2,050 0 0.00 386 -8.96 0.2617
2016-02-09 2015-12-31 13F COSTAR GROUP COM 22160N109 2,050 -100 -4.65 424 13.98 0.2814
2015-11-17 2015-09-30 13F COSTAR GROUP COM 22160N109 2,150 0 0.00 372 -13.89 0.2616
2015-08-17 2015-06-30 13F COSTAR GROUP COM 22160N109 2,150 -25 -1.15 432 0.47 0.2768
2015-05-14 2015-03-31 13F COSTAR GROUP COM 22160N109 2,175 0 0.00 430 7.50 0.2784
2015-02-17 2014-12-31 13F COSTAR GROUP COM 22160N109 2,175 -125 -5.43 400 12.04 0.2639
2014-11-12 2014-09-30 13F COSTAR GROUP COM 22160N109 2,300 0 0.00 357 -2.19 0.2422
2014-08-11 2014-06-30 13F COSTAR GROUP COM 22160N109 2,300 0 0.00 365 -14.92 0.2477
2014-05-09 2014-03-31 13F COSTAR GROUP COM 22160N109 2,300 2,300 429 0.3097
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.