CoStar Group, Inc.
MX ˙ BMV ˙ US22160N1090
DIESES SYMBOL IST NICHT MEHR AKTIV
SecurityMX:CSGP / CoStar Group, Inc.
InstitutionComerica Bank
Latest Disclosed Ownership64,101 shares
Latest Disclosed Value $ 4,310,206
Comerica Bank reports 16.66% decrease in ownership of CSGP / CoStar Group, Inc.

On January 29, 2026 - Comerica Bank filed a 13F-HR form disclosing ownership of 64,101 shares of CoStar Group, Inc. (MX:CSGP) valued at $4,310,206 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 14, 2025 disclosing 76,913 shares of CoStar Group, Inc.. This represents a change in shares of -16.66% 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)
2026-01-29 2025-12-31 13F COSTAR GROUP COM 22160N109 64,101 -12,812 -16.66 4,310 -33.58 0.0172
2025-11-14 2025-09-30 13F COSTAR GROUP COM 22160N109 76,913 -2,877 -3.61 6,489 1.15 0.0244
2025-08-14 2025-06-30 13F COSTAR GROUP COM 22160N109 79,790 -3,056 -3.69 6,415 -2.26 0.0249
2025-05-14 2025-03-31 13F COSTAR GROUP COM 22160N109 82,846 2,298 2.85 6,564 13.82 0.0276
2025-02-14 2024-12-31 13F/A-1 COSTAR GROUP COM 22160N109 80,548 -29,431 -26.76 5,766 -30.50 0.0233
2025-02-14 2024-12-31 13F COSTAR GROUP COM 22160N109 80,548 -29,431 5,766 0.0193
2024-11-14 2024-09-30 13F COSTAR GROUP COM 22160N109 109,979 -25,545 -18.85 8,297 -17.43 0.0328
2024-08-15 2024-06-30 13F COSTAR GROUP COMMON 22160N109 135,524 6,236 4.82 10,048 -19.55 0.0418
2024-05-16 2024-03-31 13F COSTAR GROUP COMMON 22160N109 129,288 4,393 3.52 12,489 14.43 0.0538
2024-02-14 2023-12-31 13F COSTAR GROUP COMMON 22160N109 124,895 5,315 4.44 10,915 18.71 0.0503
2023-11-21 2023-09-30 13F COSTAR GROUP COMMON 22160N109 119,580 119,580 9,195 0.0479
2023-08-22 2023-06-30 13F COSTAR GROUP COM 22160N109 0 -82,520 -100.00 0 -100.00
2023-01-26 2022-12-31 13F COSTAR GROUP COM 22160N109 82,520 24,262 41.65 7 -99.86 0.0511
2022-10-28 2022-09-30 13F COSTAR GROUP COM 22160N109 58,258 53,925 1,244.52 4,159 1,469.43 0.0351
2022-08-02 2022-06-30 13F COSTAR GROUP COM 22160N109 4,333 66 1.55 265 -1.85 0.0022
2022-04-27 2022-03-31 13F COSTAR GROUP COM 22160N109 4,267 303 7.64 270 1.50 0.0020
2022-02-18 2021-12-31 13F COSTAR GROUP COM 22160N109 3,964 -1,982 -33.33 266 -54.92 0.0020
2021-11-22 2021-09-30 13F COSTAR GROUP COM 22160N109 5,946 -9,224 -60.80 590 -52.65 0.0036
2021-08-26 2021-06-30 13F COSTAR GROUP COM 22160N109 15,170 12,626 496.31 1,246 -47.54 0.0074
2021-04-28 2021-03-31 13F COSTAR GROUP COM 22160N109 2,544 29 1.15 2,375 5.42 0.0142
2021-01-28 2020-12-31 13F COSTAR GROUP COM 22160N109 2,515 -176 -6.54 2,253 2.13 0.0143
2020-10-30 2020-09-30 13F COSTAR GROUP COM 22160N109 2,691 -790 -22.69 2,206 -10.11 0.0160
2020-07-31 2020-06-30 13F COSTAR GROUP COM 22160N109 3,481 -17 -0.49 2,454 18.15 0.0189
2020-05-01 2020-03-31 13F COSTAR GROUP COM 22160N109 3,498 451 14.80 2,077 3.28 0.0191
2020-02-07 2019-12-31 13F COSTAR GROUP COM 22160N109 3,047 -507 -14.27 2,011 -0.59 0.0152
2019-10-31 2019-09-30 13F COSTAR GROUP COM 22160N109 3,554 -876 -19.77 2,023 -21.74 0.0160
2019-08-02 2019-06-30 13F COSTAR GROUP COM 22160N109 4,430 78 1.79 2,585 24.10 0.0207
2019-05-02 2019-03-31 13F COSTAR GROUP COM 22160N109 4,352 -74 -1.67 2,083 23.84 0.0169
2019-02-06 2018-12-31 13F COSTAR GROUP COM 22160N109 4,426 -127 -2.79 1,682 -3.50 0.0143
2018-11-01 2018-09-30 13F COSTAR GROUP COM 22160N109 4,553 2,612 134.57 1,743 110.51 0.0141
2018-08-01 2018-06-30 13F COSTAR GROUP COM 22160N109 1,941 -1,293 -39.98 828 -32.19 0.0058
2018-05-01 2018-03-31 13F COSTAR GROUP COM 22160N109 3,234 457 16.46 1,221 24.59 0.0087
2018-02-02 2017-12-31 13F COSTAR GROUP COM 22160N109 2,777 419 17.77 980 41.01 0.0065
2017-11-06 2017-09-30 13F COSTAR GROUP COM 22160N109 2,358 769 48.40 695 56.88 0.0050
2017-08-03 2017-06-30 13F COSTAR GROUP COM 22160N109 1,589 -9 -0.56 443 17.20 0.0033
2017-05-03 2017-03-31 13F COSTAR GROUP COM 22160N109 1,598 111 7.46 378 26.42 0.0029
2017-02-08 2016-12-31 13F COSTAR GROUP COM 22160N109 1,487 1,487 -6.95 299 -20.90 0.0024
2014-08-12 2014-06-30 13F COSTAR GROUP COM 22160N109 0 -2,657 -100.00 0 -100.00
2014-05-15 2014-03-31 13F COSTAR GROUP COM 22160N109 2,657 4 0.15 496 1.22 0.0038
2014-02-11 2013-12-31 13F COSTAR GROUP COM 22160N109 2,653 -375 -12.38 490 -3.54 0.0038
2013-11-12 2013-09-30 13F COSTAR GROUP COM 22160N109 3,028 106 3.63 508 34.75 0.0035
2013-08-13 2013-06-30 13F/A-1 COSTAR GROUP COM 22160N109 2,922 2,922 377 0.0031
2013-08-08 2013-06-30 13F COSTAR GROUP COM 22160N109 8,624 1,113
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.