CoStar Group, Inc.
MX ˙ BMV ˙ US22160N1090
DIESES SYMBOL IST NICHT MEHR AKTIV
SecurityMX:CSGP / CoStar Group, Inc.
InstitutionQuadrant Capital Group Llc
Latest Disclosed Ownership16,861 shares
Latest Disclosed Value $ 680,173
Quadrant Capital Group Llc reports 537.23% increase in ownership of CSGP / CoStar Group, Inc.

On May 13, 2026 - Quadrant Capital Group Llc filed a 13F-HR/A form disclosing ownership of 16,861 shares of CoStar Group, Inc. (MX:CSGP) valued at $680,173 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 2,646 shares of CoStar Group, Inc.. This represents a change in shares of 537.23% 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.

Upgrade to unlock premium data and export to Excel .

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/A-1 COSTAR GROUP COM 22160N109 16,861 14,215 537.23 680 284.18 0.0203
2026-05-11 2026-03-31 13F COSTAR GROUP COM 22160N109 16,861 14,215 49 0.0369
2026-02-12 2025-12-31 13F COSTAR GROUP COM 22160N109 2,646 146 5.84 178 -15.71 0.0054
2025-11-13 2025-09-30 13F COSTAR GROUP COM 22160N109 2,500 2,500 211 0.0069
2025-08-13 2025-06-30 13F COSTAR GROUP COM 22160N109 0 -6,136 -100.00 0 -100.00
2025-05-13 2025-03-31 13F COSTAR GROUP COM 22160N109 6,136 3,551 137.37 486 162.70 0.0181
2025-02-13 2024-12-31 13F COSTAR GROUP COM 22160N109 2,585 108 4.36 185 -0.54 0.0127
2024-11-12 2024-09-30 13F COSTAR GROUP COM 22160N109 2,477 -42 -1.67 187 0.00 0.0130
2024-08-12 2024-06-30 13F COSTAR GROUP COM 22160N109 2,519 -164 -6.11 187 -28.19 0.0139
2024-05-15 2024-03-31 13F COSTAR GROUP COM 22160N109 2,683 953 55.09 259 71.52 0.0205
2024-02-08 2023-12-31 13F COSTAR GROUP COM 22160N109 1,730 81 4.91 151 19.84 0.0130
2023-11-14 2023-09-30 13F COSTAR GROUP COM 22160N109 1,649 185 12.64 127 -3.08 0.0127
2023-08-10 2023-06-30 13F COSTAR GROUP COM 22160N109 1,464 -91 -5.85 130 21.50 0.0129
2023-05-11 2023-03-31 13F COSTAR GROUP COM 22160N109 1,555 -1,017 -39.54 107 -45.96 0.0111
2023-02-13 2022-12-31 13F COSTAR GROUP COM 22160N109 2,572 930 56.64 199 73.68 0.0225
2022-11-10 2022-09-30 13F COSTAR GROUP COM 22160N109 1,642 -161 -8.93 114 4.59 0.0151
2022-08-09 2022-06-30 13F COSTAR GROUP COM 22160N109 1,803 228 14.48 109 3.81 0.0146
2022-05-06 2022-03-31 13F COSTAR GROUP COM 22160N109 1,575 427 37.20 105 15.38 0.0127
2022-02-01 2021-12-31 13F COSTAR GROUP COM 22160N109 1,148 -138 -10.73 91 -18.02 0.0109
2021-11-12 2021-09-30 13F COSTAR GROUP COM 22160N109 1,286 94 7.89 111 12.12 0.0155
2021-08-09 2021-06-30 13F COSTAR GROUP COM 22160N109 1,192 1,080 964.29 99 7.61 0.0144
2021-05-12 2021-03-31 13F COSTAR GROUP COM 22160N109 112 20 21.74 92 8.24 0.0149
2021-02-16 2020-12-31 13F COSTAR GROUP COM 22160N109 92 -44 -32.35 85 -26.09 0.0158
2020-11-13 2020-09-30 13F COSTAR GROUP COM 22160N109 136 35 34.65 115 59.72 0.0251
2020-08-13 2020-06-30 13F COSTAR GROUP COM 22160N109 101 -67 -39.88 72 -28.00 0.0159
2020-05-15 2020-03-31 13F Costar Group Com 22160N109 168 102 154.55 100 170.27 0.0167
2020-03-19 2019-12-31 13F/A-1 Costar Group Com 22160N109 66 3 4.76 37 2.78 0.0045
2020-02-03 2019-12-31 13F Costar Group Com 22160N109 66 3 37 125.0278
2019-10-24 2019-09-30 13F Costar Group COM 22160N109 63 0 0.00 36 9.09 0.0055
2019-07-24 2019-06-30 13F Costar Group COM 22160N109 63 0 0.00 33 17.86 0.0052
2019-04-29 2019-03-31 13F Costar Group COM 22160N109 63 0 0.00 28 47.37 0.0049
2019-01-17 2018-12-31 13F COSTAR GROUP COM 22160N109 63 6 10.53 19 -9.52 0.0051
2018-10-29 2018-09-30 13F COSTAR GROUP COM 22160N109 57 0 0.00 21 0.00 0.0060
2018-08-08 2018-06-30 13F COSTAR GROUP COM 22160N109 57 0 0.00 21 10.53 0.0074
2018-05-10 2018-03-31 13F COSTAR GROUP COM 22160N109 57 0 0.00 19 18.75 0.0069
2018-01-31 2017-12-31 13F CoStar Group COM 22160N109 57 -41 -41.84 16 -27.27 0.0064
2017-10-13 2017-09-30 13F CoStar Group COM 22160N109 98 0 0.00 22 57.14 0.0091
2017-08-14 2017-06-30 13F CoStar Group COM 22160N109 98 13 15.29 14 -6.67 0.0062
2017-04-10 2017-03-31 13F CoStar Group COM 22160N109 85 -2 -2.30 15 7.14 0.0066
2017-01-11 2016-12-31 13F CoStar Group COM 22160N109 87 0 0.00 14 -17.65 0.0070
2016-10-25 2016-09-30 13F CoStar Group COM 22160N109 87 0 0.00 17 0.00 0.0111
2016-07-28 2016-06-30 13F CoStar Group COM 22160N109 87 3 3.57 17 13.33 0.0117
2016-04-27 2016-03-31 13F CoStar Group COM 22160N109 84 14 20.00 15 7.14 0.0097
2016-01-28 2015-12-31 13F CoStar Group COM 22160N109 70 -325 -82.28 14 -78.79 0.0097
2015-10-28 2015-09-30 13F CoStar Group COM 22160N109 395 -5 -1.25 66 -15.38 0.0455
2015-08-12 2015-06-30 13F CoStar Group COM 22160N109 400 400 78 0.0496
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.