CoStar Group, Inc.
MX ˙ BMV ˙ US22160N1090
DETTE SYMBOL ER IKKE LÆNGERE AKTIVT
SecurityMX:CSGP / CoStar Group, Inc.
InstitutionNomura Asset Management Co Ltd
Latest Disclosed Ownership163,961 shares
Latest Disclosed Value $ 6,614,187
Nomura Asset Management Co Ltd reports 5.18% increase in ownership of CSGP / CoStar Group, Inc.

On May 11, 2026 - Nomura Asset Management Co Ltd filed a 13F-HR form disclosing ownership of 163,961 shares of CoStar Group, Inc. (MX:CSGP) valued at $6,614,187 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 155,881 shares of CoStar Group, Inc.. This represents a change in shares of 5.18% 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)
2026-05-11 2026-03-31 13F COSTAR GROUP COM 22160N109 163,961 8,080 5.18 6,614 -36.90 0.0107
2026-02-10 2025-12-31 13F COSTAR GROUP COM 22160N109 155,881 2,781 1.82 10,481 -18.86 0.0265
2025-11-12 2025-09-30 13F COSTAR GROUP COM 22160N109 153,100 -359 -0.23 12,917 4.69 0.0337
2025-08-11 2025-06-30 13F COSTAR GROUP COM 22160N109 153,459 6,517 4.44 12,338 5.98 0.0338
2025-05-12 2025-03-31 13F COSTAR GROUP COM 22160N109 146,942 12,024 8.91 11,642 20.54 0.0356
2025-02-12 2024-12-31 13F COSTAR GROUP COM 22160N109 134,918 -121 -0.09 9,659 -5.19 0.0291
2024-11-15 2024-09-30 13F COSTAR GROUP COM 22160N109 135,039 8,326 6.57 10,187 8.44 0.0314
2024-08-14 2024-06-30 13F COSTAR GROUP COM 22160N109 126,713 4,024 3.28 9,395 -20.73 0.0320
2024-05-13 2024-03-31 13F COSTAR GROUP COM 22160N109 122,689 1,750 1.45 11,852 12.14 0.0430
2024-02-09 2023-12-31 13F COSTAR GROUP COM 22160N109 120,939 4,621 3.97 10,569 18.17 0.0437
2023-11-03 2023-09-30 13F COSTAR GROUP COM 22160N109 116,318 4,371 3.90 8,944 -10.24 0.0419
2023-08-14 2023-06-30 13F COSTAR GROUP COM 22160N109 111,947 -4,028 -3.47 9,963 24.79 0.0459
2025-01-10 2023-03-31 13F/A-1 COSTAR GROUP COM 22160N109 115,975 4,212 3.77 7,985 -7.56 0.0420
2023-05-11 2023-03-31 13F COSTAR GROUP COM 22160N109 115,975 4,212 7,985 0.0420
2025-01-10 2022-12-31 13F/A-1 COSTAR GROUP COM 22160N109 111,763 18,735 20.14 8,637 33.31 0.0502
2023-02-14 2022-12-31 13F COSTAR GROUP COM 22160N109 111,763 18,735 8,637 0.0502
2025-01-10 2022-09-30 13F/A-3 COSTAR GROUP COM 22160N109 93,028 6,210 7.15 6,479 23.55 0.0413
2022-11-14 2022-09-30 13F/A-2 COSTAR GROUP COM 22160N109 93,028 6,210 6,479 0.0412
2022-11-10 2022-09-30 13F/A-1 COSTAR GROUP COM 22160N109 93,028 6,210 6,479 0.0412
2022-11-10 2022-09-30 13F COSTAR GROUP COM 22160N109 93,028 6,210 6,479 0.0261
2025-01-10 2022-06-30 13F/A-1 COSTAR GROUP COM 22160N109 86,818 4,288 5.20 5,245 -4.60 0.0328
2022-08-12 2022-06-30 13F COSTAR GROUP COM 22160N109 86,818 4,288 5,245 0.0324
2025-01-10 2022-03-31 13F/A-1 COSTAR GROUP COM 22160N109 82,530 3,897 4.96 5,497 -11.54 0.0299
2022-05-13 2022-03-31 13F COSTAR GROUP COM 22160N109 82,530 3,897 5,497 0.0299
2025-01-10 2021-12-31 13F/A-2 COSTAR GROUP COM 22160N109 78,633 2,421 3.18 6,214 -5.25 0.0314
2022-02-01 2021-12-31 13F COSTAR GROUP COM 22160N109 78,633 2,421 6,214 0.0314
2025-01-10 2021-09-30 13F/A-2 COSTAR GROUP COM 22160N109 76,212 -3,958 -4.94 6,559 -1.22 0.0370
2021-11-12 2021-09-30 13F COSTAR GROUP COM 22160N109 76,212 -3,958 6,559 0.0370
2025-01-10 2021-06-30 13F/A-2 COSTAR GROUP COM 22160N109 80,170 72,097 893.06 6,640 0.06 0.0384
2021-08-06 2021-06-30 13F COSTAR GROUP COM 22160N109 80,170 72,097 6,640 0.0385
2025-01-10 2021-03-31 13F/A-2 COSTAR GROUP COM 22160N109 8,073 390 5.08 6,635 -6.56 0.0423
2021-05-14 2021-03-31 13F COSTAR GROUP COM 22160N109 8,073 390 6,635 0.0423
2025-01-10 2020-12-31 13F/A-2 COSTAR GROUP COM 22160N109 7,683 297 4.02 7,101 13.31 0.0478
2021-02-12 2020-12-31 13F COSTAR GROUP COM 22160N109 7,683 297 7,102 0.0478
2020-11-12 2020-09-30 13F COSTAR GROUP COM 22160N109 7,386 -694 -8.59 6,267 9.14 0.0481
2020-08-13 2020-06-30 13F COSTAR GROUP COM 22160N109 8,080 485 6.39 5,742 28.74 0.0486
2020-05-14 2020-03-31 13F COSTAR GROUP COM 22160N109 7,595 803 11.82 4,460 9.74 0.0461
2020-02-13 2019-12-31 13F COSTAR GROUP COM 22160N109 6,792 304 4.69 4,064 5.59 0.0364
2019-11-13 2019-09-30 13F COSTAR GROUP COM 22160N109 6,488 315 5.10 3,849 12.54 0.0368
2019-08-13 2019-06-30 13F COSTAR GROUP COM 22160N109 6,173 486 8.55 3,420 28.91 0.0338
2019-05-10 2019-03-31 13F/A-1 COSTAR GROUP COM 22160N109 5,687 426 8.10 2,653 49.46 0.0261
2019-05-10 2019-03-31 13F COSTAR GROUP COM 22160N109 5,687 426 2,653
2019-02-12 2018-12-31 13F COSTAR GROUP COM 22160N109 5,261 346 7.04 1,775 -14.17 0.0198
2018-11-07 2018-09-30 13F COSTAR GROUP COM 22160N109 4,915 9 0.18 2,068 2.17 0.0201
2018-08-03 2018-06-30 13F COSTAR GROUP COM 22160N109 4,906 426 9.51 2,024 24.55 0.0210
2018-05-14 2018-03-31 13F COSTAR GROUP COM 22160N109 4,480 0 0.00 1,625 22.18 0.0177
2018-02-14 2017-12-31 13F COSTAR GROUP COM 22160N109 4,480 460 11.44 1,330 23.38 0.0154
2017-11-13 2017-09-30 13F COSTAR GROUP COM 22160N109 4,020 440 12.29 1,078 14.19 0.0139
2017-08-14 2017-06-30 13F COSTAR GROUP COM 22160N109 3,580 0 0.00 944 27.22 0.0127
2017-05-12 2017-03-31 13F COSTAR GROUP COM 22160N109 3,580 0 0.00 742 9.93 0.0010
2017-02-14 2016-12-31 13F COSTAR GROUP COM 22160N109 3,580 3,580 675 0.0122
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.