CoStar Group, Inc.
MX ˙ BMV ˙ US22160N1090
DIESES SYMBOL IST NICHT MEHR AKTIV
SecurityMX:CSGP / CoStar Group, Inc.
InstitutionAncora Advisors, LLC
Latest Disclosed Ownership244 shares
Latest Disclosed Value $ 9,843
Ancora Advisors, LLC reports 41.77% decrease in ownership of CSGP / CoStar Group, Inc.

On May 15, 2026 - Ancora Advisors, LLC filed a 13F-HR form disclosing ownership of 244 shares of CoStar Group, Inc. (MX:CSGP) valued at $9,843 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 419 shares of CoStar Group, Inc.. This represents a change in shares of -41.77% 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 INC COM COM 22160N109 244 -175 -41.77 10 -67.86 0.0001
2026-02-17 2025-12-31 13F COSTAR GROUP INC COM COM 22160N109 419 14 3.46 28 -17.65 0.0006
2025-11-14 2025-09-30 13F COSTAR GROUP INC COM COM 22160N109 405 0 0.00 34 6.25 0.0007
2025-08-14 2025-06-30 13F COSTAR GROUP INC COM COM 22160N109 405 0 0.00 33 0.00 0.0007
2025-05-15 2025-03-31 13F COSTAR GROUP INC COM COM 22160N109 405 3 0.75 32 14.29 0.0007
2025-02-14 2024-12-31 13F COSTAR GROUP INC COM COM 22160N109 402 0 0.00 29 -6.67 0.0006
2024-11-14 2024-09-30 13F COSTAR GROUP INC COM COM 22160N109 402 2 0.50 30 3.45 0.0007
2024-08-14 2024-06-30 13F COSTAR GROUP INC COM COM 22160N109 400 0 0.00 30 -23.68 0.0007
2024-05-16 2024-03-31 13F COSTAR GROUP INC COM COM 22160N109 400 0 0.00 39 11.76 0.0009
2024-02-14 2023-12-31 13F COSTAR GROUP INC COM COM 22160N109 400 -200 -33.33 35 -26.09 0.0008
2023-11-14 2023-09-30 13F COSTAR GROUP INC COM COM 22160N109 600 0 0.00 46 -13.21 0.0012
2023-08-14 2023-06-30 13F COSTAR GROUP INC COM COM 22160N109 600 0 0.00 53 29.27 0.0014
2023-05-16 2023-03-31 13F COSTAR GROUP INC COM COM 22160N109 600 -5 -0.83 41 -10.87 0.0012
2023-02-14 2022-12-31 13F COSTAR GROUP INC COM COM 22160N109 605 5 0.83 46 9.52 0.0013
2022-11-14 2022-09-30 13F COSTAR GROUP INC COM COM 22160N109 600 0 0.00 42 16.67 0.0013
2022-08-15 2022-06-30 13F COSTAR GROUP INC COM COM 22160N109 600 -140 -18.92 36 -26.53 0.0010
2022-05-16 2022-03-31 13F/A-1 COSTAR GROUP INC COM COM 22160N109 740 -300 -28.85 49 -40.24 0.0012
2022-05-13 2022-03-31 13F COSTAR GROUP INC COM COM 22160N109 157 -883 129 0.0022
2022-02-14 2021-12-31 13F COSTAR GROUP INC COM COM 22160N109 1,040 0 0.00 82 -8.89 0.0019
2021-11-15 2021-09-30 13F COSTAR GROUP INC COM COM 22160N109 1,040 -530 -33.76 90 -30.77 0.0023
2021-11-12 2021-06-30 13F/A-1 COSTAR GROUP INC COM COM 22160N109 1,570 1,413 900.00 130 0.78 0.0034
2021-08-13 2021-06-30 13F COSTAR GROUP INC COM COM 22160N109 1,570 1,413 130 0.0034
2021-11-12 2021-03-31 13F/A-1 COSTAR GROUP INC COM COM 22160N109 157 0 0.00 129 -11.03 0.0036
2021-05-14 2021-03-31 13F COSTAR GROUP INC COM COM 22160N109 157 0 129 0.0036
2021-11-12 2020-12-31 13F/A-1 COSTAR GROUP INC COM COM 22160N109 157 0 0.00 145 9.02 0.0047
2021-02-12 2020-12-31 13F COSTAR GROUP INC COM COM 22160N109 157 0 145 0.0047
2021-11-12 2020-09-30 13F/A-1 COSTAR GROUP INC COM COM 22160N109 157 -500 -76.10 133 -71.52 0.0053
2020-11-13 2020-09-30 13F COSTAR GROUP INC COM COM 22160N109 157 -500 133 0.0053
2021-11-12 2020-06-30 13F/A-1 COSTAR GROUP INC COM COM 22160N109 657 14 2.18 467 23.54 0.0195
2020-08-14 2020-06-30 13F COSTAR GROUP INC COM COM 22160N109 657 14 467 0.0195
2021-11-12 2020-03-31 13F/A-1 COSTAR GROUP INC COM COM 22160N109 643 0 0.00 378 -1.82 0.0175
2020-05-14 2020-03-31 13F COSTAR GROUP INC COM COM 22160N109 643 0 378 0.0175
2020-02-14 2019-12-31 13F COSTAR GROUP INC COM COM 22160N109 643 20 3.21 385 4.05 0.0143
2019-11-19 2019-09-30 13F/A-2 COSTAR GROUP INC COM COM 22160N109 623 0 0.00 370 7.25 0.0161
2019-11-18 2019-09-30 13F/A-1 COSTAR GROUP INC COM COM 22160N109 623 0 370 0.0161
2019-11-14 2019-09-30 13F COSTAR GROUP INC COM COM 22160N109 623 0 370 0.0162
2019-11-14 2019-06-30 13F/A-1 COSTAR GROUP INC COM COM 22160N109 623 0 0.00 345 18.56 0.0155
2019-08-12 2019-06-30 13F COSTAR GROUP INC COM COM 22160N109 623 0 345 14,249.9861
2019-11-14 2019-03-31 13F/A-1 COSTAR GROUP INC COM COM 22160N109 623 0 0.00 291 38.57 0.0132
2019-05-15 2019-03-31 13F COSTAR GROUP INC COM COM 22160N109 623 0 291 12,122.6007
2019-11-14 2018-12-31 13F/A-1 COSTAR GROUP INC COM COM 22160N109 623 500 406.50 210 303.85 0.0101
2019-02-14 2018-12-31 13F COSTAR GROUP INC COM COM 22160N109 623 500 210
2018-11-13 2018-09-30 13F COSTAR GROUP INC COM COM 22160N109 123 123 52 0.0020
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.