CoStar Group, Inc.
MX ˙ BMV ˙ US22160N1090
DETTE SYMBOL ER IKKE LÆNGERE AKTIVT
SecurityMX:CSGP / CoStar Group, Inc.
InstitutionFirst Trust Advisors Lp
Latest Disclosed Ownership839,044 shares
Latest Disclosed Value $ 33,847,034
First Trust Advisors Lp reports 19.29% increase in ownership of CSGP / CoStar Group, Inc.

On May 13, 2026 - First Trust Advisors Lp filed a 13F-HR form disclosing ownership of 839,044 shares of CoStar Group, Inc. (MX:CSGP) valued at $33,847,034 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 703,358 shares of CoStar Group, Inc.. This represents a change in shares of 19.29% 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 839,044 135,686 19.29 33,847 -28.43 0.0241
2026-02-13 2025-12-31 13F COSTAR GROUP COM 22160N109 703,358 28,608 4.24 47,294 -16.92 0.0344
2025-11-12 2025-09-30 13F COSTAR GROUP COM 22160N109 674,750 58,212 9.44 56,929 14.85 0.0423
2025-08-13 2025-06-30 13F COSTAR GROUP COM 22160N109 616,538 339,464 122.52 49,570 125.81 0.0399
2025-05-14 2025-03-31 13F COSTAR GROUP COM 22160N109 277,074 -30,471 -9.91 21,953 -0.30 0.0194
2025-02-13 2024-12-31 13F COSTAR GROUP COM 22160N109 307,545 29,224 10.50 22,017 4.86 0.0194
2024-11-13 2024-09-30 13F COSTAR GROUP COM 22160N109 278,321 -99,835 -26.40 20,997 -25.11 0.0200
2024-08-13 2024-06-30 13F COSTAR GROUP COM 22160N109 378,156 116,610 44.58 28,036 10.97 0.0286
2024-05-13 2024-03-31 13F COSTAR GROUP COM 22160N109 261,546 -34,798 -11.74 25,265 -2.44 0.0256
2024-02-13 2023-12-31 13F COSTAR GROUP COM 22160N109 296,344 -97,298 -24.72 25,898 -14.44 0.0283
2023-11-13 2023-09-30 13F COSTAR GROUP COM 22160N109 393,642 122,834 45.36 30,267 25.58 0.0359
2023-08-14 2023-06-30 13F COSTAR GROUP COM 22160N109 270,808 -57,640 -17.55 24,102 6.58 0.0274
2023-05-15 2023-03-31 13F COSTAR GROUP COM 22160N109 328,448 26,522 8.78 22,614 -3.09 0.0261
2023-02-09 2022-12-31 13F COSTAR GROUP COM 22160N109 301,926 210,890 231.66 23,334 268.04 0.0277
2022-11-14 2022-09-30 13F COSTAR GROUP COM 22160N109 91,036 12,707 16.22 6,340 33.98 0.0082
2022-08-12 2022-06-30 13F COSTAR GROUP COM 22160N109 78,329 54,663 230.98 4,732 200.25 0.0058
2022-05-13 2022-03-31 13F COSTAR GROUP COM 22160N109 23,666 -102,795 -81.29 1,576 -84.23 0.0016
2022-02-08 2021-12-31 13F COSTAR GROUP COM 22160N109 126,461 -11,700 -8.47 9,994 -15.95 0.0097
2021-11-15 2021-09-30 13F COSTAR GROUP COM 22160N109 138,161 122,461 780.01 11,890 785.99 0.0128
2021-10-12 2021-06-30 13F/A-1 COSTAR GROUP COM 22160N109 15,700 9,017 134.92 1,342 -75.57 0.0015
2021-08-16 2021-06-30 13F COSTAR GROUP COM 22160N109 23,091 16,408 1,912 0.0020
2021-05-14 2021-03-31 13F COSTAR GROUP COM 22160N109 6,683 -3,114 -31.79 5,493 -39.34 0.0067
2021-02-02 2020-12-31 13F COSTAR GROUP COM 22160N109 9,797 -1,778 -15.36 9,055 -7.81 0.0120
2020-11-05 2020-09-30 13F COSTAR GROUP COM 22160N109 11,575 -21,593 -65.10 9,822 -58.33 0.0157
2020-07-22 2020-06-30 13F COSTAR GROUP COM 22160N109 33,168 2,654 8.70 23,572 31.55 0.0409
2020-05-06 2020-03-31 13F COSTAR GROUP COM 22160N109 30,514 -18,119 -37.26 17,918 -38.42 0.0406
2020-02-03 2019-12-31 13F COSTAR GROUP COM 22160N109 48,633 6,489 15.40 29,097 16.39 0.0497
2019-11-04 2019-09-30 13F COSTAR GROUP COM 22160N109 42,144 -2,684 -5.99 25,000 0.66 0.0471
2019-07-30 2019-06-30 13F COSTAR GROUP COM 22160N109 44,828 35,994 407.45 24,837 502.84 0.0468
2019-06-19 2019-03-31 13F/A-1 COSTAR GROUP COM 22160N109 8,834 -7,095 -44.54 4,120 -23.32 0.0082
2019-05-09 2019-03-31 13F COSTAR GROUP COM 22160N109 8,834 -7,095 4,120
2019-02-07 2018-12-31 13F COSTAR GROUP COM 22160N109 15,929 -62,334 -79.65 5,373 -83.69 0.0127
2018-10-25 2018-09-30 13F COSTAR GROUP COM 22160N109 78,263 -6,659 -7.84 32,936 -6.01 0.0613
2018-08-02 2018-06-30 13F COSTAR GROUP COM 22160N109 84,922 24,631 40.85 35,041 60.25 0.0727
2018-04-23 2018-03-31 13F COSTAR GROUP COM 22160N109 60,291 17,848 42.05 21,866 73.50 0.0502
2018-02-08 2017-12-31 13F COSTAR GROUP COM 22160N109 42,443 -46,675 -52.37 12,603 -47.28 0.0300
2017-10-24 2017-09-30 13F COSTAR GROUP COM 22160N109 89,118 85,817 2,599.73 23,906 2,647.82 0.0615
2017-08-02 2017-06-30 13F COSTAR GROUP COM 22160N109 3,301 3,301 870 0.0023
2017-05-02 2017-03-31 13F COSTAR GROUP COM 22160N109 0 -46,428 -100.00 0 -100.00
2017-02-06 2016-12-31 13F COSTAR GROUP COM 22160N109 46,428 32,535 234.18 8,751 190.92 0.0260
2016-11-01 2016-09-30 13F COSTAR GROUP COM 22160N109 13,893 10,741 340.77 3,008 336.57 0.0090
2016-08-04 2016-06-30 13F COSTAR GROUP COM 22160N109 3,152 -4,377 -58.14 689 -51.38 0.0022
2016-05-10 2016-03-31 13F COSTAR GROUP COM 22160N109 7,529 7,529 0.00 1,417 0.0046
2016-05-04 2015-12-31 13F/A-1 COSTAR GROUP COM 22160N109 0 -15,996 -100.00 0 -100.00
2015-11-05 2015-09-30 13F COSTAR GROUP COM 22160N109 15,996 1,352 9.23 2,768 -6.07 0.0080
2015-08-04 2015-06-30 13F COSTAR GROUP COM 22160N109 14,644 -1,990 -11.96 2,947 -10.45 0.0076
2015-05-04 2015-03-31 13F COSTAR GROUP COM 22160N109 16,634 16,634 3,291 0.0097
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.