CoStar Group, Inc.
MX ˙ BMV ˙ US22160N1090
DETTE SYMBOL ER IKKE LÆNGERE AKTIVT
SecurityMX:CSGP / CoStar Group, Inc.
InstitutionSG Americas Securities, LLC
Latest Disclosed Ownership272,347 shares
Latest Disclosed Value $ 10,986
SG Americas Securities, LLC reports 15.95% increase in ownership of CSGP / CoStar Group, Inc.

On April 16, 2026 - SG Americas Securities, LLC filed a 13F-HR form disclosing ownership of 272,347 shares of CoStar Group, Inc. (MX:CSGP) valued at $10,986 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 9, 2026 disclosing 234,893 shares of CoStar Group, Inc.. This represents a change in shares of 15.95% 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)
2026-04-16 2026-03-31 13F COSTAR GROUP INC COM COM 22160N109 272,347 37,454 15.95 11 -33.33 0.0118
2026-01-09 2025-12-31 13F COSTAR GROUP INC COM COM 22160N109 234,893 230,378 5,102.50 16 0.0202
2025-10-23 2025-09-30 13F COSTAR GROUP INC COM COM 22160N109 4,515 -12,901 -74.08 0 -100.00 0.0013
2025-08-08 2025-06-30 13F COSTAR GROUP INC COM COM 22160N109 17,416 1,699 10.81 1 0.00 0.0058
2025-04-15 2025-03-31 13F COSTAR GROUP INC COM COM 22160N109 15,717 10,558 204.65 1 0.0041
2025-01-17 2024-12-31 13F COSTAR GROUP INC COM COM 22160N109 5,159 -68,407 -92.99 0 -100.00 0.0015
2024-10-03 2024-09-30 13F COSTAR GROUP INC COM COM 22160N109 73,566 18,468 33.52 6 25.00 0.0201
2024-07-12 2024-06-30 13F COSTAR GROUP INC COM COM 22160N109 55,098 -44,702 -44.79 4 -55.56 0.0238
2024-05-06 2024-03-31 13F COSTAR GROUP INC COM COM 22160N109 99,800 79,467 390.83 10 800.00 0.0464
2024-01-12 2023-12-31 13F COSTAR GROUP INC COM COM 22160N109 20,333 2,947 16.95 2 0.00 0.0166
2023-10-13 2023-09-30 13F COSTAR GROUP INC COM COM 22160N109 17,386 -127,736 -88.02 1 -91.67 0.0153
2023-07-10 2023-06-30 13F COSTAR GROUP INC COM COM 22160N109 145,122 120,190 482.07 13 1,100.00 0.0976
2023-04-28 2023-03-31 13F COSTAR GROUP INC COM COM 22160N109 24,932 -6,621 -20.98 2 -50.00 0.0200
2023-02-02 2022-12-31 13F COSTAR GROUP INC COM COM 22160N109 31,553 17,371 122.49 2 -99.80 0.0297
2022-10-31 2022-09-30 13F COSTAR GROUP INC COM COM 22160N109 14,182 9,101 179.12 988 221.82 0.0122
2022-07-29 2022-06-30 13F COSTAR GROUP INC COM COM 22160N109 5,081 -17,653 -77.65 307 -79.72 0.0033
2022-04-29 2022-03-31 13F COSTAR GROUP INC COM COM 22160N109 22,734 -11,580 -33.75 1,514 -44.17 0.0111
2022-02-07 2021-12-31 13F COSTAR GROUP INC COM COM 22160N109 34,314 -6,994 -16.93 2,712 -23.71 0.0148
2021-11-01 2021-09-30 13F COSTAR GROUP INC COM COM 22160N109 41,308 -106,436 -72.04 3,555 -70.95 0.0167
2021-08-12 2021-06-30 13F COSTAR GROUP INC COM COM 22160N109 147,744 147,124 23,729.68 12,236 2,299.22 0.0569
2021-05-13 2021-03-31 13F COSTAR GROUP INC COM COM 22160N109 620 -212 -25.48 510 -33.68 0.0027
2021-02-04 2020-12-31 13F COSTAR GROUP INC COM COM 22160N109 832 -992 -54.39 769 -50.32 0.0041
2020-11-09 2020-09-30 13F COSTAR GROUP INC COM COM 22160N109 1,824 -1,733 -48.72 1,548 -38.77 0.0098
2020-07-20 2020-06-30 13F COSTAR GROUP INC COM COM 22160N109 3,557 2,731 330.63 2,528 421.24 0.0210
2020-04-30 2020-03-31 13F COSTAR GROUP INC COM COM 22160N109 826 -8,124 -90.77 485 -90.94 0.0045
2020-01-28 2019-12-31 13F COSTAR GROUP INC COM COM 22160N109 8,950 7,524 527.63 5,355 532.98 0.0489
2019-11-04 2019-09-30 13F COSTAR GROUP INC COM COM 22160N109 1,426 1,426 846 0.0069
2019-07-29 2019-06-30 13F COSTAR GROUP INC COM COM 22160N109 0 -3,071 -100.00 0 -100.00
2019-04-29 2019-03-31 13F COSTAR GROUP INC COM COM 22160N109 3,071 1,720 127.31 1,432 214.04 0.0132
2019-01-31 2018-12-31 13F COSTAR GROUP INC COM COM 22160N109 1,351 -2,139 -61.29 456 -68.96 0.0040
2018-11-06 2018-09-30 13F COSTAR GROUP INC COM COM 22160N109 3,490 2,877 469.33 1,469 480.63 0.0109
2018-08-07 2018-06-30 13F COSTAR GROUP INC COM COM 22160N109 613 -2,950 -82.80 253 -80.42 0.0023
2018-05-03 2018-03-31 13F COSTAR GROUP INC COM COM 22160N109 3,563 -9,188 -72.06 1,292 -65.87 0.0103
2018-01-24 2017-12-31 13F COSTAR GROUP INC COM COM 22160N109 12,751 12,083 1,808.83 3,786 2,015.08 0.0353
2017-11-07 2017-09-30 13F COSTAR GROUP INC COM COM 22160N109 668 -3,457 -83.81 179 -83.53 0.0016
2017-08-03 2017-06-30 13F COSTAR GROUP INC COM COM 22160N109 4,125 2,007 94.76 1,087 147.61 0.0098
2017-05-10 2017-03-31 13F COSTAR GROUP INC COM COM 22160N109 2,118 -2,221 -51.19 439 -46.33 0.0039
2017-02-08 2016-12-31 13F COSTAR GROUP INC COM COM 22160N109 4,339 4,339 818 0.0069
2016-05-12 2016-03-31 13F COSTAR GROUP INC COM COM 22160N109 0 -848 -100.00 0 -100.00
2016-02-12 2015-12-31 13F COSTAR GROUP INC COM COM 22160N109 848 848 0.00 175 0.0012
2015-11-09 2015-09-30 13F COSTAR GROUP INC COM COM 22160N109 0 -499 -100.00 0 -100.00
2015-08-06 2015-06-30 13F COSTAR GROUP INC COM COM 22160N109 499 -2,019 -80.18 100 -79.92 0.0007
2015-05-13 2015-03-31 13F COSTAR GROUP INC COM COM 22160N109 2,518 1,562 163.39 498 182.95 0.0030
2015-02-12 2014-12-31 13F COSTAR GROUP INC COM COM 22160N109 956 -148 -13.41 176 2.33 0.0009
2014-11-13 2014-09-30 13F COSTAR GROUP INC COM COM 22160N109 1,104 296 36.63 172 34.38 0.0010
2014-08-13 2014-06-30 13F COSTAR GROUP INC COM COM 22160N109 808 808 -81.06 128 -82.12 0.0007
2014-02-12 2013-12-31 13F COSTAR GROUP INC COM COM 22160N109 0 -4,265 -100.00 0 -100.00
2013-11-12 2013-09-30 13F COSTAR GROUP INC COM COM 22160N109 4,265 3,356 369.20 716 511.97 0.0029
2013-08-13 2013-06-30 13F COSTAR GROUP INC COM COM 22160N109 909 909 117 0.0006
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.