CoStar Group, Inc.
MX ˙ BMV ˙ US22160N1090
DETTE SYMBOL ER IKKE LÆNGERE AKTIVT
SecurityMX:CSGP / CoStar Group, Inc.
InstitutionEmerald Advisers, Llc
Latest Disclosed Ownership4,808 shares
Latest Disclosed Value $ 193,955
Emerald Advisers, Llc ownership in CSGP / CoStar Group, Inc.

On May 4, 2026 - Emerald Advisers, Llc filed a 13F-HR form disclosing ownership of 4,808 shares of CoStar Group, Inc. (MX:CSGP) valued at $193,955 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 4,808 shares of CoStar Group, Inc.. This represents a change in shares of 0.00% 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)
2026-05-04 2026-03-31 13F COSTAR GROUP COM 22160N109 4,808 0 0.00 194 -40.25 0.0061
2026-02-09 2025-12-31 13F COSTAR GROUP COM 22160N109 4,808 -215 -4.28 323 -23.64 0.0100
2025-10-30 2025-09-30 13F COSTAR GROUP COM 22160N109 5,023 -740 -12.84 424 -8.64 0.0136
2025-08-04 2025-06-30 13F COSTAR GROUP COM 22160N109 5,763 110 1.95 463 3.58 0.0170
2025-05-01 2025-03-31 13F COSTAR GROUP COM 22160N109 5,653 -315 -5.28 448 4.68 0.0202
2025-02-11 2024-12-31 13F COSTAR GROUP COM 22160N109 5,968 -2,027 -25.35 427 -29.19 0.0166
2024-10-29 2024-09-30 13F COSTAR GROUP COM 22160N109 7,995 -199 -2.43 603 -0.66 0.0233
2024-08-06 2024-06-30 13F COSTAR GROUP COM 22160N109 8,194 -4,573 -35.82 608 -50.77 0.0255
2024-05-08 2024-03-31 13F COSTAR GROUP COM 22160N109 12,767 -219 -1.69 1,233 8.73 0.0496
2024-02-05 2023-12-31 13F COSTAR GROUP COM 22160N109 12,986 -240 -1.81 1,135 11.61 0.0486
2023-10-26 2023-09-30 13F COSTAR GROUP COM 22160N109 13,226 3,037 29.81 1,017 12.14 0.0493
2023-07-25 2023-06-30 13F COSTAR GROUP COM 22160N109 10,189 -152 -1.47 907 27.43 0.0397
2023-05-04 2023-03-31 13F COSTAR GROUP COM 22160N109 10,341 -3,130 -23.24 712 -31.70 0.0341
2023-02-03 2022-12-31 13F COSTAR GROUP COM 22160N109 13,471 -229 -1.67 1,041 9.12 0.0503
2022-10-25 2022-09-30 13F COSTAR GROUP COM 22160N109 13,700 -115 -0.83 954 14.25 0.0492
2022-07-29 2022-06-30 13F COSTAR GROUP COM 22160N109 13,815 0 0.00 835 -9.24 0.0429
2022-04-29 2022-03-31 13F COSTAR GROUP COM 22160N109 13,815 -111 -0.80 920 -16.44 0.0351
2022-02-02 2021-12-31 13F COSTAR GROUP COM 22160N109 13,926 -5,936 -29.89 1,101 -35.58 0.0406
2021-10-28 2021-09-30 13F COSTAR GROUP COM 22160N109 19,862 -618 -3.02 1,709 0.77 0.0621
2021-07-29 2021-06-30 13F COSTAR GROUP COM 22160N109 20,480 18,432 900.00 1,696 0.77 0.0618
2021-04-29 2021-03-31 13F COSTAR GROUP COM 22160N109 2,048 -50 -2.38 1,683 -13.20 0.0607
2021-01-29 2020-12-31 13F COSTAR GROUP COM 22160N109 2,098 -55 -2.55 1,939 6.13 0.0643
2020-10-28 2020-09-30 13F COSTAR GROUP COM 22160N109 2,153 -276 -11.36 1,827 5.85 0.0752
2020-07-28 2020-06-30 13F COSTAR GROUP COM 22160N109 2,429 -666 -21.52 1,726 -5.01 0.0752
2020-04-30 2020-03-31 13F COSTAR GROUP COM 22160N109 3,095 -44 -1.40 1,817 -3.25 0.1051
2020-01-29 2019-12-31 13F COSTAR GROUP COM 22160N109 3,139 438 16.22 1,878 17.23 0.0793
2019-10-31 2019-09-30 13F COSTAR GROUP COM 22160N109 2,701 -384 -12.45 1,602 -6.26 0.0748
2019-07-31 2019-06-30 13F COSTAR GROUP COM 22160N109 3,085 -1,102 -26.32 1,709 -12.49 0.0686
2019-05-01 2019-03-31 13F COSTAR GROUP COM 22160N109 4,187 23 0.55 1,953 39.00 0.0794
2019-01-30 2018-12-31 13F COSTAR GROUP COM 22160N109 4,164 -1,464 -26.01 1,405 -40.67 0.0691
2018-10-30 2018-09-30 13F COSTAR GROUP COM 22160N109 5,628 -163 -2.81 2,368 -0.92 0.0870
2018-07-31 2018-06-30 13F COSTAR GROUP COM 22160N109 5,791 -265 -4.38 2,390 8.83 0.0902
2018-04-26 2018-03-31 13F COSTAR GROUP COM 22160N109 6,056 415 7.36 2,196 31.10 0.0880
2018-02-05 2017-12-31 13F COSTAR GROUP COM 22160N109 5,641 758 15.52 1,675 27.86 0.0645
2017-10-30 2017-09-30 13F COSTAR GROUP COM 22160N109 4,883 2,489 103.97 1,310 107.61 0.0533
2017-07-28 2017-06-30 13F COSTAR GROUP COM 22160N109 2,394 2,394 631 0.0264
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.