CoStar Group, Inc.
MX ˙ BMV ˙ US22160N1090
DETTE SYMBOL ER IKKE LÆNGERE AKTIVT
SecurityMX:CSGP / CoStar Group, Inc.
InstitutionSwiss National Bank
Latest Disclosed Ownership1,243,765 shares
Latest Disclosed Value $ 50,173,480
Swiss National Bank reports 7.13% increase in ownership of CSGP / CoStar Group, Inc.

On May 7, 2026 - Swiss National Bank filed a 13F-HR form disclosing ownership of 1,243,765 shares of CoStar Group, Inc. (MX:CSGP) valued at $50,173,480 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 1,160,965 shares of CoStar Group, Inc.. This represents a change in shares of 7.13% 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 1,243,765 82,800 7.13 50,173 -35.73 0.0289
2026-02-12 2025-12-31 13F COSTAR GROUP COM 22160N109 1,160,965 -55,200 -4.54 78,063 -23.92 0.0465
2025-11-13 2025-09-30 13F COSTAR GROUP COM 22160N109 1,216,165 -60,600 -4.75 102,608 -0.04 0.0595
2025-08-12 2025-06-30 13F COSTAR GROUP COM 22160N109 1,276,765 88,600 7.46 102,652 9.04 0.0615
2025-05-12 2025-03-31 13F COSTAR GROUP COM 22160N109 1,188,165 30,465 2.63 94,138 13.58 0.0665
2025-02-10 2024-12-31 13F COSTAR GROUP COM 22160N109 1,157,700 -54,700 -4.51 82,880 -9.39 0.0551
2024-11-07 2024-09-30 13F COSTAR GROUP COM 22160N109 1,212,400 3,200 0.26 91,463 2.02 0.0594
2024-08-08 2024-06-30 13F COSTAR GROUP COM 22160N109 1,209,200 -13,700 -1.12 89,650 -24.11 0.0616
2024-05-07 2024-03-31 13F COSTAR GROUP COM 22160N109 1,222,900 -54,000 -4.23 118,132 5.86 0.0828
2024-02-06 2023-12-31 13F COSTAR GROUP COM 22160N109 1,276,900 -37,200 -2.83 111,588 10.44 0.0819
2023-11-08 2023-09-30 13F COSTAR GROUP COM 22160N109 1,314,100 -155,100 -10.56 101,041 -22.73 0.0793
2023-08-09 2023-06-30 13F COSTAR GROUP COM 22160N109 1,469,200 -144,800 -8.97 130,759 17.67 0.0888
2023-05-10 2023-03-31 13F COSTAR GROUP COM 22160N109 1,614,000 4,800 0.30 111,124 -10.64 0.0762
2023-02-08 2022-12-31 13F COSTAR GROUP COM 22160N109 1,609,200 -107,890 -6.28 124,359 3.98 0.0893
2022-11-09 2022-09-30 13F COSTAR GROUP COM 22160N109 1,717,090 4,000 0.23 119,595 15.56 0.0856
2022-08-09 2022-06-30 13F COSTAR GROUP COM 22160N109 1,713,090 2,500 0.15 103,488 -9.17 0.0700
2022-05-09 2022-03-31 13F COSTAR GROUP COM 22160N109 1,710,590 209,400 13.95 113,942 -3.96 0.0642
2022-02-08 2021-12-31 13F COSTAR GROUP COM 22160N109 1,501,190 -62,400 -3.99 118,639 -11.83 0.0714
2021-11-08 2021-09-30 13F COSTAR GROUP COM 22160N109 1,563,590 -42,500 -2.65 134,563 1.16 0.0856
2021-08-06 2021-06-30 13F COSTAR GROUP COM 22160N109 1,606,090 1,454,490 959.43 133,016 6.76 0.0820
2021-05-07 2021-03-31 13F COSTAR GROUP COM 22160N109 151,600 3,000 2.02 124,599 -9.28 0.0831
2021-02-05 2020-12-31 13F COSTAR GROUP COM 22160N109 148,600 -4,600 -3.00 137,348 5.66 0.0976
2020-11-09 2020-09-30 13F COSTAR GROUP COM 22160N109 153,200 1,100 0.72 129,992 20.26 0.1017
2020-08-05 2020-06-30 13F COSTAR GROUP COM 22160N109 152,100 9,900 6.96 108,093 29.45 0.0914
2020-05-08 2020-03-31 13F COSTAR GROUP COM 22160N109 142,200 26,900 23.33 83,501 21.04 0.0886
2020-02-06 2019-12-31 13F COSTAR GROUP COM 22160N109 115,300 -5,500 -4.55 68,984 -3.73 0.0708
2019-11-12 2019-09-30 13F COSTAR GROUP COM 22160N109 120,800 2,000 1.68 71,659 8.87 0.0762
2019-08-02 2019-06-30 13F COSTAR GROUP COM 22160N109 118,800 -2,700 -2.22 65,822 16.15 0.0710
2019-05-10 2019-03-31 13F COSTAR GROUP COM 22160N109 121,500 3,200 2.70 56,670 42.01 0.0622
2019-02-13 2018-12-31 13F COSTAR GROUP COM 22160N109 118,300 2,000 1.72 39,907 -18.46 0.0512
2018-11-08 2018-09-30 13F COSTAR GROUP COM 22160N109 116,300 -3,400 -2.84 48,944 -0.91 0.0545
2018-08-09 2018-06-30 13F COSTAR GROUP COM 22160N109 119,700 3,800 3.28 49,392 17.50 0.0565
2018-05-04 2018-03-31 13F COSTAR GROUP COM 22160N109 115,900 -15,900 -12.06 42,035 7.40 0.0513
2018-02-07 2017-12-31 13F COSTAR GROUP COM 22160N109 131,800 11,400 9.47 39,138 21.18 0.0423
2017-11-03 2017-09-30 13F COSTAR GROUP COM 22160N109 120,400 1,700 1.43 32,297 3.22 0.0368
2017-08-09 2017-06-30 13F COSTAR GROUP COM 22160N109 118,700 3,200 2.77 31,289 30.73 0.0371
2017-05-04 2017-03-31 13F COSTAR GROUP COM 22160N109 115,500 24,900 27.48 23,934 40.15 0.0298
2017-02-08 2016-12-31 13F COSTAR GROUP COM 22160N109 90,600 37,891 71.89 17,077 49.63 0.0269
2016-11-07 2016-09-30 13F COSTAR GROUP COM 22160N109 52,709 -1,300 -2.41 11,413 -3.36 0.0183
2016-08-03 2016-06-30 13F COSTAR GROUP COM 22160N109 54,009 300 0.56 11,810 21.05 0.0191
2016-05-04 2016-03-31 13F COSTAR GROUP COM 22160N109 53,709 10,700 24.88 9,756 9.74 0.0179
2016-02-03 2015-12-31 13F COSTAR GROUP COM 22160N109 43,009 0 0.00 8,890 19.44 0.0215
2015-11-04 2015-09-30 13F COSTAR GROUP COM 22160N109 43,009 6,299 17.16 7,443 0.74 0.0191
2015-08-05 2015-06-30 13F COSTAR GROUP COM 22160N109 36,710 600 1.66 7,388 3.42 0.0191
2015-05-06 2015-03-31 13F COSTAR GROUP COM 22160N109 36,110 36,110 0.00 7,144 0.0191
2015-02-03 2014-12-31 13F COSTAR GROUP COM 22160N109 0 -33,610 -100.00 0 -100.00
2014-11-04 2014-09-30 13F COSTAR GROUP COM 22160N109 33,610 -700 -2.04 5,228 -3.67 0.0200
2014-08-06 2014-06-30 13F COSTAR GROUP COM 22160N109 34,310 2,410 7.55 5,427 -8.90 0.0201
2014-05-06 2014-03-31 13F COSTAR GROUP COM 22160N109 31,900 7,200 29.15 5,957 30.66 0.0234
2014-01-31 2013-12-31 13F COSTAR GROUP COM 22160N109 24,700 1,000 4.22 4,559 14.58 0.0178
2013-10-29 2013-09-30 13F COSTAR GROUP COM 22160N109 23,700 -1,000 -4.05 3,979 24.81 0.0166
2013-08-09 2013-06-30 13F COSTAR GROUP COM 22160N109 24,700 24,700 3,188 0.0140
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.