CoStar Group, Inc.
MX ˙ BMV ˙ US22160N1090
DETTE SYMBOL ER IKKE LÆNGERE AKTIVT
SecurityMX:CSGP / CoStar Group, Inc.
InstitutionMalaga Cove Capital, LLC
Latest Disclosed Ownership29,440 shares
Latest Disclosed Value $ 1,187,610
Malaga Cove Capital, LLC reports 4.34% decrease in ownership of CSGP / CoStar Group, Inc.

On May 7, 2026 - Malaga Cove Capital, LLC filed a 13F-HR form disclosing ownership of 29,440 shares of CoStar Group, Inc. (MX:CSGP) valued at $1,187,610 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 30,776 shares of CoStar Group, Inc.. This represents a change in shares of -4.34% 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)
2026-05-07 2026-03-31 13F COSTAR GROUP COM 22160N109 29,440 -1,336 -4.34 1,188 -42.63 0.4268
2026-02-09 2025-12-31 13F COSTAR GROUP COM 22160N109 30,776 4,231 15.94 2,069 -7.59 0.7164
2025-11-13 2025-09-30 13F COSTAR GROUP COM 22160N109 26,545 271 1.03 2,240 6.01 0.8127
2025-08-06 2025-06-30 13F COSTAR GROUP COM 22160N109 26,274 53 0.20 2,112 1.69 0.8297
2025-05-09 2025-03-31 13F COSTAR GROUP COM 22160N109 26,221 103 0.39 2,077 11.13 0.8979
2025-02-14 2024-12-31 13F COSTAR GROUP COM 22160N109 26,118 -734 -2.73 1,870 -7.70 0.7340
2024-10-31 2024-09-30 13F COSTAR GROUP COM 22160N109 26,852 -323 -1.19 2,026 0.55 0.8148
2024-08-07 2024-06-30 13F COSTAR GROUP COM 22160N109 27,175 1,500 5.84 2,015 -18.79 0.8183
2024-05-07 2024-03-31 13F COSTAR GROUP COM 22160N109 25,675 -393 -1.51 2,480 8.87 1.0107
2024-02-06 2023-12-31 13F COSTAR GROUP COM 22160N109 26,068 2,376 10.03 2,278 25.10 0.9613
2023-10-31 2023-09-30 13F COSTAR GROUP COM 22160N109 23,692 -374 -1.55 1,822 -14.95 0.8411
2023-08-02 2023-06-30 13F COSTAR GROUP COM 22160N109 24,066 -392 -1.60 2,142 27.21 0.9896
2023-05-15 2023-03-31 13F COSTAR GROUP COM 22160N109 24,458 2,809 12.98 1,684 0.60 0.8323
2023-02-09 2022-12-31 13F COSTAR GROUP COM 22160N109 21,649 1,155 5.64 1,673 17.24 0.9125
2022-11-07 2022-09-30 13F COSTAR GROUP COM 22160N109 20,494 0 0.00 1,427 15.92 0.8134
2022-08-02 2022-06-30 13F COSTAR GROUP COM 22160N109 20,494 0 0.00 1,231 -9.82 0.6871
2022-04-28 2022-03-31 13F COSTAR GROUP COM 22160N109 20,494 -63 -0.31 1,365 -16.00 0.6206
2022-02-10 2021-12-31 13F COSTAR GROUP COM 22160N109 20,557 -430 -2.05 1,625 -10.02 0.6356
2021-11-05 2021-09-30 13F COSTAR GROUP COM 22160N109 20,987 2,747 15.06 1,806 19.52 0.7442
2021-07-27 2021-06-30 13F COSTAR GROUP COM 22160N109 18,240 16,468 929.35 1,511 2.86 0.6441
2021-05-07 2021-03-31 13F COSTAR GROUP COM 22160N109 1,772 319 21.95 1,469 9.46 0.6271
2021-02-05 2020-12-31 13F COSTAR GROUP COM 22160N109 1,453 5 0.35 1,342 9.19 0.6309
2020-11-03 2020-09-30 13F COSTAR GROUP COM 22160N109 1,448 6 0.42 1,229 19.90 0.7158
2020-07-29 2020-06-30 13F COSTAR GROUP COM 22160N109 1,442 -4 -0.28 1,025 19.32 0.6258
2020-05-15 2020-03-31 13F COSTAR GROUP COM 22160N109 1,446 219 17.85 859 17.03 0.7052
2020-02-13 2019-12-31 13F COSTAR GROUP COM 22160N109 1,227 1,227 734 0.4547
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.