CoStar Group, Inc.
MX ˙ BMV ˙ US22160N1090
DETTE SYMBOL ER IKKE LÆNGERE AKTIVT
SecurityMX:CSGP / CoStar Group, Inc.
InstitutionSegall Bryant & Hamill, Llc
Latest Disclosed Ownership26,988 shares
Latest Disclosed Value $ 1,223,636
Segall Bryant & Hamill, Llc ownership in CSGP / CoStar Group, Inc.

On May 15, 2026 - Segall Bryant & Hamill, Llc filed a 13F-HR form disclosing ownership of 26,988 shares of CoStar Group, Inc. (MX:CSGP) valued at $1,223,636 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 14, 2023 disclosing 0 shares of CoStar Group, Inc..

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)
2026-05-15 2026-03-31 13F COSTAR GROUP COM 22160N109 26,988 26,988 1,224 0.0198
2023-02-14 2022-12-31 13F COSTAR GROUP COM 22160N109 0 -3,027 -100.00 0 -100.00
2022-11-14 2022-09-30 13F COSTAR GROUP COM 22160N109 3,027 -11,760 -79.53 210 -76.40 0.0025
2022-08-15 2022-06-30 13F COSTAR GROUP COM 22160N109 14,787 -840 -5.38 890 -14.26 0.0100
2022-05-13 2022-03-31 13F COSTAR GROUP COM 22160N109 15,627 -14,658 -48.40 1,038 -56.77 0.0099
2022-02-14 2021-12-31 13F COSTAR GROUP COM 22160N109 30,285 -472,691 -93.98 2,401 -94.46 0.0222
2021-12-30 2021-09-30 13F/A-1 COSTAR GROUP COM 22160N109 502,976 -6,565 -1.29 43,329 2.68 0.4144
2021-11-03 2021-09-30 13F COSTAR GROUP COM 22160N109 502,976 -6,565 43,329 0.4193
2021-08-12 2021-06-30 13F COSTAR GROUP COM 22160N109 509,541 345,995 211.56 42,197 -68.61 0.4094
2021-05-13 2021-03-31 13F COSTAR GROUP COM 22160N109 163,546 130,616 396.65 134,424 341.70 1.3288
2021-02-12 2020-12-31 13F COSTAR GROUP COM 22160N109 32,930 9,136 38.40 30,433 50.83 0.3385
2020-11-13 2020-09-30 13F COSTAR GROUP COM 22160N109 23,794 18,548 353.56 20,177 441.08 0.2740
2020-08-14 2020-06-30 13F COSTAR GROUP COM 22160N109 5,246 -2,603 -33.16 3,729 -19.09 0.0627
2020-05-14 2020-03-31 13F COSTAR GROUP COM 22160N109 7,849 676 9.42 4,609 7.36 0.0936
2020-02-11 2019-12-31 13F COSTAR GROUP COM 22160N109 7,173 -1,082 -13.11 4,293 -12.32 0.0666
2019-11-12 2019-09-30 13F COSTAR GROUP COM 22160N109 8,255 -1,183 -12.53 4,896 -6.35 0.0760
2019-08-14 2019-06-30 13F Costar Group COM 22160N109 9,438 -1,219 -11.44 5,228 5.19 0.0790
2019-05-15 2019-03-31 13F Costar Group COM 22160N109 10,657 483 4.75 4,970 44.81 0.0772
2019-02-14 2018-12-31 13F Costar Group COM 22160N109 10,174 500 5.17 3,432 -15.70 0.0591
2018-11-14 2018-09-30 13F Costar Group COM 22160N109 9,674 -2,667 -21.61 4,071 -20.05 0.0599
2018-08-08 2018-06-30 13F Costar Group COM 22160N109 12,341 4,431 56.02 5,092 77.48 0.0776
2018-05-15 2018-03-31 13F Costar Group COM 22160N109 7,910 -5,885 -42.66 2,869 -29.96 0.0664
2018-02-15 2017-12-31 13F Costar Group COM 22160N109 13,795 -1,358 -8.96 4,096 0.76 0.0902
2017-11-14 2017-09-30 13F Costar Group -Common Stk P0 22160N109 15,153 476 3.24 4,065 5.07 0.0944
2017-08-14 2017-06-30 13F Costar Group -Common Stk P0 22160N109 14,677 1,190 8.82 3,869 38.43 0.0911
2017-05-12 2017-03-31 13F Costar Group -Common Stk P0 22160N109 13,487 11,911 755.77 2,795 841.08 0.0675
2017-02-14 2016-12-31 13F Costar Group -Common Stk P0 22160N109 1,576 -551 -25.91 297 -35.57 0.0075
2016-11-14 2016-09-30 13F Costar Group -Common Stk P0 22160N109 2,127 282 15.28 461 14.39 0.0118
2016-08-10 2016-06-30 13F Costar Group -Common Stk P0 22160N109 1,845 1,845 403 0.0106
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.