CoStar Group, Inc.
MX ˙ BMV ˙ US22160N1090
DETTE SYMBOL ER IKKE LÆNGERE AKTIVT
SecurityMX:CSGP / CoStar Group, Inc.
InstitutionNordea Investment Management Ab
Latest Disclosed Ownership87,230 shares
Latest Disclosed Value $ 3,476,988
Nordea Investment Management Ab reports 95.69% increase in ownership of CSGP / CoStar Group, Inc.

On May 13, 2026 - Nordea Investment Management Ab filed a 13F-HR form disclosing ownership of 87,230 shares of CoStar Group, Inc. (MX:CSGP) valued at $3,476,988 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 8, 2026 disclosing 44,575 shares of CoStar Group, Inc.. This represents a change in shares of 95.69% 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)
2026-05-13 2026-03-31 13F COSTAR GROUP COM 22160N109 87,230 42,655 95.69 3,477 16.29 0.0012
2026-01-08 2025-12-31 13F COSTAR GROUP COM 22160N109 44,575 3,829 9.40 2,989 -12.01 0.0026
2025-10-27 2025-09-30 13F COSTAR GROUP COM 22160N109 40,746 4,596 12.71 3,398 16.58 0.0030
2025-07-29 2025-06-30 13F COSTAR GROUP COM 22160N109 36,150 3,133 9.49 2,914 11.69 0.0027
2025-05-14 2025-03-31 13F COSTAR GROUP COM 22160N109 33,017 115 0.35 2,609 9.85 0.0028
2025-01-06 2024-12-31 13F COSTAR GROUP COM 22160N109 32,902 1,172 3.69 2,376 -0.34 0.0025
2024-11-05 2024-09-30 13F COSTAR GROUP COM 22160N109 31,730 992 3.23 2,383 4.66 0.0027
2024-08-08 2024-06-30 13F COSTAR GROUP COM 22160N109 30,738 2,554 9.06 2,277 -17.08 0.0027
2024-05-02 2024-03-31 13F COSTAR GROUP COM 22160N109 28,184 1,424 5.32 2,746 17.30 0.0032
2024-01-10 2023-12-31 13F COSTAR GROUP COM 22160N109 26,760 605 2.31 2,341 15.49 0.0030
2023-11-13 2023-09-30 13F COSTAR GROUP COM 22160N109 26,155 -1,002 -3.69 2,028 -18.50 0.0028
2023-07-07 2023-06-30 13F COSTAR GROUP COM 22160N109 27,157 0 0.00 2,488 34.58 0.0034
2023-04-19 2023-03-31 13F COSTAR GROUP COM 22160N109 27,157 2,766 11.34 1,849 -1.70 0.0027
2023-02-08 2022-12-31 13F COSTAR GROUP COM 22160N109 24,391 630 2.65 1,881 11.37 0.0029
2022-10-19 2022-09-30 13F COSTAR GROUP COM 22160N109 23,761 0 0.00 1,688 21.53 0.0027
2022-08-09 2022-06-30 13F COSTAR GROUP COM 22160N109 23,761 3,201 15.57 1,389 -0.29 0.0021
2022-04-11 2022-03-31 13F COSTAR GROUP COM 22160N109 20,560 0 0.00 1,393 -15.16 0.0017
2022-01-20 2021-12-31 13F COSTAR GROUP COM 22160N109 20,560 0 0.00 1,642 -6.81 0.0020
2021-11-01 2021-09-30 13F/A-1 COSTAR GROUP COM 22160N109 20,560 0 0.00 1,762 3.46 0.0023
2021-11-01 2021-09-30 13F COSTAR GROUP COM 22160N109 41,120 20,560 3,524 0.0015
2021-07-16 2021-06-30 13F COSTAR GROUP COM 22160N109 20,560 3,165 18.19 1,703 -87.89 0.0023
2021-05-17 2021-03-31 13F COSTAR GROUP COM 22160N109 17,395 -4,488 -20.51 14,059 -30.49 0.0204
2021-02-12 2020-12-31 13F COSTAR GROUP COM 22160N109 21,883 2,661 13.84 20,226 21.84 0.0325
2020-11-09 2020-09-30 13F COSTAR GROUP COM 22160N109 19,222 -10,236 -34.75 16,600 -18.85 0.0311
2020-08-13 2020-06-30 13F COSTAR GROUP COM 22160N109 29,458 15,154 105.94 20,456 143.81 0.0212
2020-05-15 2020-03-31 13F COSTAR GROUP COM 22160N109 14,304 6,683 87.69 8,390 85.70 0.0202
2020-02-11 2019-12-31 13F COSTAR GROUP COM 22160N109 7,621 57 0.75 4,518 2.38 0.0090
2019-11-13 2019-09-30 13F COSTAR GROUP COM 22160N109 7,564 6,156 437.22 4,413 465.04 0.0096
2019-08-14 2019-06-30 13F COSTAR GROUP COM 22160N109 1,408 0 0.00 781 19.05 0.0017
2019-05-20 2019-03-31 13F CoStar Group COM 22160N109 1,408 0 0.00 656 38.11 0.0014
2019-02-20 2018-12-31 13F/A-2 CoStar Group COM 22160N109 1,408 0 0.00 475 -19.76 0.0011
2019-02-19 2018-12-31 13F/A-1 CoStar Group COM 22160N109 1,408 0 475 0.0011
2019-02-14 2018-12-31 13F CoStar Group COM 22160N109 1,408 0 475
2018-11-16 2018-09-30 13F/A-1 CoStar Group COM 22160N109 1,408 434 44.56 592 47.26 0.0012
2018-11-14 2018-09-30 13F CoStar Group COM 22160N109 1,408 434 592
2018-08-13 2018-06-30 13F CoStar Group Common 22160N109 974 0 0.00 402 13.88 0.0010
2018-05-14 2018-03-31 13F CoStar Group Common 22160N109 974 0 0.00 353 22.15 0.0008
2018-02-09 2017-12-31 13F CoStar Group Common 22160N109 974 0 0.00 289 10.73 0.0007
2017-11-09 2017-09-30 13F CoStar Group Common 22160N109 974 0 0.00 261 1.56 0.0006
2017-08-11 2017-06-30 13F CoStar Group Common 22160N109 974 0 0.00 257 27.23 0.0006
2017-05-09 2017-03-31 13F CoStar Group COMMON 22160N109 974 0 0.00 202 9.78 0.0005
2017-02-08 2016-12-31 13F CoStar Group COMMON 22160N109 974 974 184 0.0005
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.