CoStar Group, Inc.
MX ˙ BMV ˙ US22160N1090
DETTE SYMBOL ER IKKE LÆNGERE AKTIVT
SecurityMX:CSGP / CoStar Group, Inc.
InstitutionNational Pension Service
Latest Disclosed Ownership702,678 shares
Latest Disclosed Value $ 28,346,031
National Pension Service reports 3.01% increase in ownership of CSGP / CoStar Group, Inc.

On May 12, 2026 - National Pension Service filed a 13F-HR form disclosing ownership of 702,678 shares of CoStar Group, Inc. (MX:CSGP) valued at $28,346,031 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 682,119 shares of CoStar Group, Inc.. This represents a change in shares of 3.01% 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)
2026-05-12 2026-03-31 13F COSTAR GROUP COM 22160N109 702,678 20,559 3.01 28,346 -38.20 0.0215
2026-02-10 2025-12-31 13F COSTAR GROUP COSTAR GROUP INC 22160N109 682,119 128,520 23.22 45,866 -1.80 0.0340
2025-11-04 2025-09-30 13F COSTAR GROUP COM 22160N109 553,599 11,998 2.22 46,707 7.26 0.0363
2025-08-08 2025-06-30 13F COSTAR GROUP COM 22160N109 541,601 4,539 0.85 43,545 2.33 0.0376
2025-05-13 2025-03-31 13F COSTAR GROUP COM 22160N109 537,062 45,316 9.22 42,551 20.87 0.0409
2025-02-05 2024-12-31 13F COSTAR GROUP COM 22160N109 491,746 -529,197 -51.83 35,204 -54.29 0.0333
2024-10-30 2024-09-30 13F COSTARGROUPINC COM 22160N109 1,020,943 6,826 0.67 77,020 2.44 0.0743
2024-08-13 2024-06-30 13F COSTAR GROUP COM 22160N109 1,014,117 42,454 4.37 75,187 -19.90 0.0864
2024-05-14 2024-03-31 13F COSTAR GROUP COM 22160N109 971,663 34,218 3.65 93,863 14.57 0.1126
2024-02-07 2023-12-31 13F COSTAR GROUP COM 22160N109 937,445 27,388 3.01 81,923 17.98 0.1141
2023-11-15 2023-09-30 13F COSTAR GROUP COM 22160N109 910,057 16,577 1.86 69,437 -13.76 0.1111
2023-08-16 2023-06-30 13F COSTAR GROUP COM 22160N109 893,480 24,497 2.82 80,520 35.97 0.1299
2023-05-12 2023-03-31 13F COSTAR GROUP COM 22160N109 868,983 375,757 76.18 59,221 55.37 0.1078
2023-02-24 2022-12-31 13F/A-1 COSTAR GROUP COM 22160N109 493,226 9,720 2.01 38,117 11.52 0.0750
2023-02-21 2022-12-31 13F COSTAR GROUP COM 22160N109 493,226 9,720 38 0.0750
2023-02-24 2022-09-30 13F/A-1 COSTAR GROUP COM 22160N109 483,506 -60,880 -11.18 34,179 3.93 0.0713
2022-11-18 2022-09-30 13F COSTAR GROUP COM 22160N109 483,506 -60,880 34,179 0.0713
2022-08-17 2022-06-30 13F COSTAR GROUP COM 22160N109 544,386 0 0.00 32,886 -9.31 0.0678
2022-05-13 2022-03-31 13F COSTAR GROUP COM 22160N109 544,386 -5,647 -1.03 36,262 -16.58 0.0662
2022-02-15 2021-12-31 13F COSTAR GROUP COM 22160N109 550,033 -4,342 -0.78 43,469 -8.89 0.0758
2021-11-18 2021-09-30 13F COSTAR GROUP COM 22160N109 554,375 -3,075 -0.55 47,710 3.34 0.0908
2021-08-17 2021-06-30 13F COSTAR GROUP COM 22160N109 557,450 501,707 900.04 46,168 0.77 0.0877
2021-05-14 2021-03-31 13F COSTAR GROUP COM 22160N109 55,743 966 1.76 45,815 -9.51 0.0958
2021-02-19 2020-12-31 13F COSTAR GROUP COM 22160N109 54,777 1,260 2.35 50,629 10.37 0.1154
2020-11-13 2020-09-30 13F COSTAR GROUP COM 22160N109 53,517 0 0.00 45,871 20.61 0.1205
2020-08-11 2020-06-30 13F COSTAR GROUP COM 22160N109 53,517 3,487 6.97 38,033 29.46 0.1086
2020-05-27 2020-03-31 13F COSTAR GROUP COM 22160N109 50,030 0 0.00 29,378 -1.85 0.0994
2020-02-21 2019-12-31 13F COSTAR GROUP COM 22160N109 50,030 -1,182 -2.31 29,933 -1.47 0.0821
2019-11-15 2019-09-30 13F COSTAR GROUP COM 22160N109 51,212 2,671 5.50 30,379 12.95 0.0961
2019-08-14 2019-06-30 13F COSTAR GROUP COM 22160N109 48,541 2,950 6.47 26,895 26.48 0.0899
2019-05-15 2019-03-31 13F COSTAR GROUP COM 22160N109 45,591 1,879 4.30 21,265 19.30 0.0818
2019-02-15 2018-12-31 13F COSTAR GROUP COM 22160N109 43,712 1,959 4.69 17,825 1.45 0.0735
2018-11-15 2018-09-30 13F COSTAR GROUP COM 22160N109 41,753 0 0.00 17,571 1.32 0.0715
2018-08-14 2018-06-30 13F COSTAR GROUP COM 22160N109 41,753 -531 -1.26 17,342 13.08 0.0785
2018-04-13 2018-03-31 13F COSTAR GROUP COM 22160N109 42,284 42,284 15,336 0.0760
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.