CoStar Group, Inc.
IT ˙ BIT ˙ US22160N1090
27,96 € 0,00 (0,00%)
2026-06-03
DEL PRIS
SecurityIT:1CSGP / CoStar Group, Inc.
InstitutionMather Group, Llc.
Latest Disclosed Ownership2,170 shares
Latest Disclosed Value $ 87,538
Mather Group, Llc. ownership in 1CSGP / CoStar Group, Inc.

On April 13, 2026 - Mather Group, Llc. filed a 13F-HR form disclosing ownership of 2,170 shares of CoStar Group, Inc. (IT:1CSGP) valued at $83,209 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 13, 2026 disclosing 0 shares of CoStar Group, Inc.. The current value of the position is $60,673 USD.

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)
2026-04-13 2026-03-31 13F COSTAR GROUP COM 22160N109 2,170 2,170 88 0.0009
2026-01-13 2025-12-31 13F COSTAR GROUP COM 22160N109 0 -100.00 0
2025-10-21 2025-09-30 13F COSTAR GROUP COM 22160N109 2,648 78 3.04 223 8.25 0.0023
2025-07-15 2025-06-30 13F COSTAR GROUP COM 22160N109 2,570 86 3.46 207 5.10 0.0022
2025-04-25 2025-03-31 13F COSTAR GROUP COM 22160N109 2,484 419 20.29 197 33.33 0.0023
2025-01-27 2024-12-31 13F COSTAR GROUP COM 22160N109 2,065 -94 -4.35 148 -9.26 0.0019
2024-10-07 2024-09-30 13F COSTAR GROUP COM 22160N109 2,159 -337 -13.50 163 -32.78 0.0021
2024-07-09 2024-06-30 13F COSTAR GROUP COM 22160N109 2,496 67 2.76 241 13.68 0.0030
2024-04-09 2024-03-31 13F COSTAR GROUP COM 22160N109 2,429 13 0.54 212 0.47 0.0034
2024-02-05 2023-12-31 13F COSTAR GROUP COM 22160N109 2,416 2,416 211 0.0033
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.