CoStar Group, Inc.
MX ˙ BMV ˙ US22160N1090
DETTE SYMBOL ER IKKE LÆNGERE AKTIVT
SecurityMX:CSGP / CoStar Group, Inc.
InstitutionRedmond Asset Management, LLC
Latest Disclosed Ownership15,915 shares
Latest Disclosed Value $ 642,011
Redmond Asset Management, LLC reports 3.96% increase in ownership of CSGP / CoStar Group, Inc.

On May 6, 2026 - Redmond Asset Management, LLC filed a 13F-HR form disclosing ownership of 15,915 shares of CoStar Group, Inc. (MX:CSGP) valued at $642,011 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 15,309 shares of CoStar Group, Inc.. This represents a change in shares of 3.96% 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)
2026-05-06 2026-03-31 13F COSTAR GROUP COM 22160N109 15,915 606 3.96 642 -37.61 0.1753
2026-02-09 2025-12-31 13F COSTAR GROUP COM 22160N109 15,309 -433 -2.75 1,029 -22.52 0.2625
2025-11-10 2025-09-30 13F COSTAR GROUP COM 22160N109 15,742 -65 -0.41 1,328 4.57 0.3261
2025-08-01 2025-06-30 13F COSTAR GROUP COM 22160N109 15,807 -146 -0.92 1,271 0.55 0.3030
2025-05-13 2025-03-31 13F COSTAR GROUP COM 22160N109 15,953 338 2.16 1,264 13.07 0.3259
2025-02-03 2024-12-31 13F COSTAR GROUP COM 22160N109 15,615 835 5.65 1,118 0.18 0.2791
2024-11-13 2024-09-30 13F COSTAR GROUP COM 22160N109 14,780 -2,325 -13.59 1,115 -12.07 0.3498
2024-08-09 2024-06-30 13F COSTAR GROUP COM 22160N109 17,105 -1,565 -8.38 1,268 -29.67 0.4175
2024-05-07 2024-03-31 13F COSTAR GROUP COM 22160N109 18,670 169 0.91 1,804 11.57 0.5729
2024-02-12 2023-12-31 13F COSTAR GROUP COM 22160N109 18,501 -850 -4.39 1,617 8.68 0.5212
2023-10-24 2023-09-30 13F COSTAR GROUP COM 22160N109 19,351 60 0.31 1,488 -13.34 0.5302
2023-08-09 2023-06-30 13F COSTAR GROUP COM 22160N109 19,291 -341 -1.74 1,717 27.02 0.5576
2023-05-03 2023-03-31 13F/A-1 COSTAR GROUP COM 22160N109 19,632 -208 -1.05 1,352 -11.87 0.4674
2023-05-03 2023-03-31 13F COSTAR GROUP COM 22160N109 19,632 -208 1,352 0.4674
2023-02-06 2022-12-31 13F COSTAR GROUP COM 22160N109 19,840 -315 -1.56 1,533 9.19 0.5507
2022-11-10 2022-09-30 13F COSTAR GROUP COM 22160N109 20,155 -210 -1.03 1,404 14.15 0.5225
2022-08-10 2022-06-30 13F COSTAR GROUP COM 22160N109 20,365 600 3.04 1,230 -6.61 0.4415
2022-05-03 2022-03-31 13F COSTAR GROUP COM 22160N109 19,765 300 1.54 1,317 -14.37 0.3924
2022-02-04 2021-12-31 13F COSTAR GROUP COM 22160N109 19,465 830 4.45 1,538 -4.11 0.4297
2021-10-22 2021-09-30 13F COSTAR GRP COM 22160N109 18,635 85 0.46 1,604 4.43 0.5024
2021-08-11 2021-06-30 13F COSTAR GRP COM 22160N109 18,550 16,747 928.84 1,536 3.71 0.4506
2021-05-06 2021-03-31 13F COSTAR GRP COM 22160N109 1,803 -10 -0.55 1,481 -11.63 0.4605
2021-02-11 2020-12-31 13F COSTAR GRP COM 22160N109 1,813 -218 -10.73 1,676 -2.73 0.5939
2020-11-06 2020-09-30 13F COSTAR GRP COM 22160N109 2,031 -14 -0.68 1,723 18.58 0.7207
2020-08-10 2020-06-30 13F COSTAR GRP COM 22160N109 2,045 0 0.00 1,453 20.98 0.6053
2020-05-06 2020-03-31 13F COSTAR GRP COM 22160N109 2,045 -87 -4.08 1,201 -5.80 0.5975
2020-02-11 2019-12-31 13F COSTAR GRP COM 22160N109 2,132 15 0.71 1,275 1.51 0.5411
2019-11-07 2019-09-30 13F COSTAR GRP COM 22160N109 2,117 -10 -0.47 1,256 6.62 0.5572
2019-08-01 2019-06-30 13F COSTAR GRP COM 22160N109 2,127 -2,473 -53.76 1,178 -45.11 0.5065
2019-04-24 2019-03-31 13F COSTAR GRP COM 22160N109 4,600 0 0.00 2,146 38.27 0.9334
2019-02-06 2018-12-31 13F COSTAR GRP COM 22160N109 4,600 0 0.00 1,552 -19.83 0.7425
2018-11-13 2018-09-30 13F COSTAR GRP COM 22160N109 4,600 -4 -0.09 1,936 1.89 0.7596
2018-08-09 2018-06-30 13F COSTAR GRP COM 22160N109 4,604 4 0.09 1,900 13.91 0.8063
2018-05-07 2018-03-31 13F/A-1 COSTAR GRP COM 22160N109 4,600 0 0.00 1,668 22.11 0.7423
2018-05-07 2018-03-31 13F COSTAR GRP COM 22160N109 4,600 0 1,366
2018-02-02 2017-12-31 13F COSTAR GROUP INC COM COM 22160N109 4,600 0 0.00 1,366 10.70 0.5875
2017-11-06 2017-09-30 13F COSTAR GROUP INC COM COM 22160N109 4,600 8 0.17 1,234 1.98 0.5628
2017-08-14 2017-06-30 13F COSTAR GROUP INC COM COM 22160N109 4,592 0 0.00 1,210 27.10 0.5689
2017-08-08 2017-03-31 13F/A-1 COSTAR GROUP INC COM COM 22160N109 4,592 0 0.00 952 9.93 0.4875
2017-05-11 2017-03-31 13F COSTAR GROUP COM 22160N109 4,592 866
2017-02-10 2016-12-31 13F COSTAR GROUP COM 22160N109 4,592 -70 -1.50 866 -14.17 0.3994
2016-11-14 2016-09-30 13F COSTAR GROUP COM 22160N109 4,662 0 0.00 1,009 -0.98 0.4939
2016-08-12 2016-06-30 13F COSTAR GROUP COM 22160N109 4,662 76 1.66 1,019 18.08 0.5078
2016-05-16 2016-03-31 13F COSTAR GROUP COM 22160N109 4,586 100 2.23 863 -6.90 0.4344
2016-02-16 2015-12-31 13F COSTAR GROUP COM 22160N109 4,486 13 0.29 927 19.77 0.5021
2015-10-14 2015-09-30 13F COSTAR GROUP COM 22160N109 4,473 -298 -6.25 774 -19.37 0.4119
2015-08-13 2015-06-30 13F COSTAR GRP COM 22160N109 4,771 -90 -1.85 960 -0.21 0.4740
2015-05-12 2015-03-31 13F COSTAR GRP COM 22160N109 4,861 1,190 32.42 962 42.73 0.4850
2015-02-09 2014-12-31 13F COSTAR GROUP COM 22160N109 3,671 -4 -0.11 674 17.83 0.3352
2014-11-13 2014-09-30 13F COSTAR GROUP COM 22160N109 3,675 616 20.14 572 18.18 0.2965
2014-08-13 2014-06-30 13F COSTAR GRP COM 22160N109 3,059 3,059 76.82 484 66.90 0.2363
2014-02-14 2013-12-31 13F CoStar Group COM 22160N109 0 -1,730 -100.00 0 -100.00
2013-11-14 2013-09-30 13F CoStar Group COM 22160N109 1,730 1,730 290 0.1686
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.