CoStar Group, Inc.
US ˙ NasdaqGS ˙ US22160N1090

SecurityCSGP / CoStar Group, Inc.
InstitutionStock Portfolio - Stock Portfolio
Latest Disclosed Ownership64,601 shares
Latest Disclosed Value $ 5,193,920
Stock Portfolio - Stock Portfolio ownership in CSGP / CoStar Group, Inc.

On August 25, 2025 - Stock Portfolio - Stock Portfolio filed a NPORT-P form disclosing ownership of 64,601 shares of CoStar Group, Inc. (US:CSGP) valued at $5,193,920 USD as of June 30, 2025. The entity filed a previous NPORT-P on May 28, 2025 disclosing 64,601 shares of CoStar Group, Inc.. This represents a change in shares of 0.00% during the quarter. The current value of the position is $2,174,470 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)
2025-08-25 2025-06-30 NP CoStar Group EC US22160N1090 64,601 0 0.00 5,194 1.47 0.6761
2025-05-28 2025-03-31 NP CoStar Group EC US22160N1090 64,601 -39,288 -37.82 5,118 -31.18 0.7414
2025-02-19 2024-12-31 NP CoStar Group EC US22160N1090 103,889 2,383 2.35 7,437 -2.87 0.9957
2024-11-27 2024-09-30 NP CoStar Group EC US22160N1090 101,506 25,448 33.46 7,658 35.81 1.0179
2024-08-20 2024-06-30 NP CoStar Group EC US22160N1090 76,058 0 0.00 5,639 -23.26 0.8012
2024-05-28 2024-03-31 NP CoStar Group EC US22160N1090 76,058 76,058 7,347 1.0960
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.