코스타그룹(주)
US ˙ NasdaqGS ˙ US22160N1090

SecurityCSGP / CoStar Group, Inc.
InstitutionRMR Wealth Builders
Latest Disclosed Ownership16,576 shares
Latest Disclosed Value $ 668,676
RMR Wealth Builders reports 3.37% increase in ownership of CSGP / CoStar Group, Inc.

On April 22, 2026 - RMR Wealth Builders filed a 13F-HR form disclosing ownership of 16,576 shares of CoStar Group, Inc. (US:CSGP) valued at $668,676 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 29, 2026 disclosing 16,036 shares of CoStar Group, Inc.. This represents a change in shares of 3.37% during the quarter. The current value of the position is $557,948 USD.

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)
2026-04-22 2026-03-31 13F COSTAR GROUP COM 22160N109 16,576 540 3.37 669 -38.03 0.0527
2026-01-29 2025-12-31 13F COSTAR GROUP COM 22160N109 16,036 0 0.00 1,078 -20.27 0.0863
2025-11-05 2025-09-30 13F COSTAR GROUP COM 22160N109 16,036 2,148 15.47 1,353 21.15 0.1132
2025-07-08 2025-06-30 13F COSTAR GROUP COM 22160N109 13,888 -31 -0.22 1,117 1.27 0.1015
2025-04-16 2025-03-31 13F COSTAR GROUP COM 22160N109 13,919 -25 -0.18 1,103 10.42 0.1161
2025-01-14 2024-12-31 13F/A-1 COSTAR GROUP COM 22160N109 13,944 14 0.10 998 -4.95 0.1032
2025-01-10 2024-12-31 13F COSTAR GROUP COM 22160N109 13,944 14 998 0.1038
2024-10-21 2024-09-30 13F COSTAR GROUP COM 22160N109 13,930 42 0.30 1,051 2.04 0.1114
2024-07-23 2024-06-30 13F COSTAR GROUP COM 22160N109 13,888 0 0.00 1,030 -23.27 0.1182
2024-04-15 2024-03-31 13F COSTAR GROUP COM 22160N109 13,888 0 0.00 1,342 10.55 0.1622
2024-02-06 2023-12-31 13F COSTAR GROUP COM 22160N109 13,888 0 0.00 1,214 13.68 0.1705
2023-10-23 2023-09-30 13F COSTAR GROUP COM 22160N109 13,888 0 0.00 1,068 -13.67 0.1705
2023-07-21 2023-06-30 13F COSTAR GROUP COM 22160N109 13,888 0 0.00 1,236 29.29 0.2103
2023-04-11 2023-03-31 13F COSTAR GROUP COM 22160N109 13,888 0 0.00 956 -10.90 0.1818
2023-02-15 2022-12-31 13F/A-1 COSTAR GROUP COM 22160N109 13,888 0 0.00 1,073 10.96 0.2433
2023-02-02 2022-12-31 13F COSTAR GROUP COM 22160N109 13,888 0 1 0.2892
2022-11-08 2022-09-30 13F COSTAR GROUP COM 22160N109 13,888 2,910 26.51 967 45.85 0.2365
2022-08-02 2022-06-30 13F COSTAR GROUP COM 22160N109 10,978 1,468 15.44 663 4.74 0.1652
2022-05-13 2022-03-31 13F COSTAR GROUP COM 22160N109 9,510 9,510 633 0.1358
2022-02-02 2021-12-31 13F COSTAR GROUP COM 22160N109 0 -9,510 -100.00 0 -100.00
2021-10-18 2021-09-30 13F COSTAR GROUP COM 22160N109 9,510 0 0.00 818 3.81 0.2402
2021-08-16 2021-06-30 13F COSTAR GROUP INC COM Common Stock 22160N109 9,510 8,559 900.00 788 0.77 0.2583
2021-05-13 2021-03-31 13F COSTAR GROUP COM 22160N109 951 15 1.60 782 -9.60 0.2032
2021-02-26 2020-12-31 13F/A-1 COSTAR GROUP COM 22160N109 936 -15 -1.58 865 7.19 0.4249
2021-02-09 2020-12-31 13F COSTAR GROUP COM 22160N109 224 -727 865 473,513.3596
2020-11-13 2020-09-30 13F COSTAR GROUP COM 22160N109 951 15 1.60 807 21.35 0.2095
2020-08-19 2020-06-30 13F COSTAR GROUP COM 22160N109 936 0 0.00 665 18.75 0.5928
2020-03-03 2019-12-31 13F COSTAR GROUP INC COM COM 22160N109 936 936 560 0.5395
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.