CoStar Group, Inc.
US ˙ NasdaqGS ˙ US22160N1090

SecurityCSGP / CoStar Group, Inc.
InstitutionMan Group plc
Latest Disclosed Ownership64,729 shares
Latest Disclosed Value $ 2,611,168
Man Group plc reports 71.26% decrease in ownership of CSGP / CoStar Group, Inc.

On May 15, 2026 - Man Group plc filed a 13F-HR form disclosing ownership of 64,729 shares of CoStar Group, Inc. (US:CSGP) valued at $2,611,168 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 225,253 shares of CoStar Group, Inc.. This represents a change in shares of -71.26% during the quarter. The current value of the position is $2,161,949 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)
2026-05-15 2026-03-31 13F COSTAR GROUP COM 22160N109 64,729 -160,524 -71.26 2,611 -82.76 0.0047
2026-02-17 2025-12-31 13F COSTAR GROUP COM 22160N109 225,253 105,994 88.88 15,146 50.54 0.0257
2025-11-14 2025-09-30 13F COSTAR GROUP COM 22160N109 119,259 108,891 1,050.26 10,062 1,107.80 0.0175
2025-08-14 2025-06-30 13F COSTAR GROUP COM 22160N109 10,368 177 1.74 834 3.22 0.0016
2025-05-15 2025-03-31 13F COSTAR GROUP COM 22160N109 10,191 -18,644 -64.66 807 -60.90 0.0020
2025-02-14 2024-12-31 13F COSTAR GROUP COM 22160N109 28,835 -61,805 -68.19 2,064 -69.81 0.0054
2024-11-14 2024-09-30 13F COSTAR GROUP COM 22160N109 90,640 -100,649 -52.62 6,838 -51.79 0.0178
2024-08-14 2024-06-30 13F COSTAR GROUP COM 22160N109 191,289 165,146 631.70 14,182 461.66 0.0358
2024-05-15 2024-03-31 13F COSTAR GROUP COM 22160N109 26,143 -13,212 -33.57 2,525 -26.58 0.0064
2024-02-14 2023-12-31 13F COSTAR GROUP COM 22160N109 39,355 3,439 -28.11 0.0096
2023-11-14 2023-09-30 13F COSTAR GROUP COM 22160N109 4,785 0.95 0.0148
2023-08-14 2023-06-30 13F COSTAR GROUP COM 22160N109 53,254 53,254 4,740 0.0146
2023-05-15 2023-03-31 13F COSTAR GROUP COM 22160N109 0 -103,424 -100.00 0 -100.00
2023-02-14 2022-12-31 13F COSTAR GROUP COM 22160N109 103,424 99,468 2,514.36 7,993 2,795.65 0.0287
2022-11-14 2022-09-30 13F COSTAR GROUP COM 22160N109 3,956 276 -96.15 0.0013
2022-08-15 2022-06-30 13F COSTAR GROUP COM 22160N109 7,164 -53.14 0.0304
2022-05-16 2022-03-31 13F COSTAR GROUP COM 22160N109 229,530 -93,761 -29.00 15,289 -40.16 0.0532
2022-02-14 2021-12-31 13F COSTAR GROUP COM 22160N109 323,291 63,219 24.31 25,549 14.15 0.0821
2021-11-15 2021-09-30 13F COSTAR GROUP COM 22160N109 260,072 35,726 15.92 22,381 20.45 0.0785
2021-08-16 2021-06-30 13F COSTAR GROUP COM 22160N109 224,346 215,391 2,405.26 18,581 152.46 0.0654
2021-05-17 2021-03-31 13F COSTAR GROUP COM 22160N109 8,955 -6,727 -42.90 7,360 -49.22 0.0324
2021-02-16 2020-12-31 13F COSTAR GROUP COM 22160N109 15,682 4,587 41.34 14,494 53.96 0.0636
2020-11-16 2020-09-30 13F COSTAR GROUP COM 22160N109 11,095 1,002 9.93 9,414 31.24 0.0370
2020-08-14 2020-06-30 13F COSTAR GROUP COM 22160N109 10,093 -252 -2.44 7,173 18.07 0.0362
2020-05-15 2020-03-31 13F COSTAR GROUP COM 22160N109 10,345 6,009 138.58 6,075 134.10 0.0394
2020-02-18 2019-12-31 13F COSTAR GROUP COM 22160N109 4,336 360 9.05 2,595 10.05 0.0085
2019-11-14 2019-09-30 13F COSTAR GROUP COM 22160N109 3,976 -3,857 -49.24 2,358 -45.66 0.0088
2019-08-14 2019-06-30 13F COSTAR GROUP COM 22160N109 7,833 -10,100 -56.32 4,339 -48.12 0.0157
2019-05-15 2019-03-31 13F COSTAR GROUP COM 22160N109 17,933 14,242 385.86 8,364 571.81 0.0317
2019-02-14 2018-12-31 13F COSTAR GROUP COM 22160N109 3,691 -3,536 -48.93 1,245 -59.06 0.0055
2018-11-14 2018-09-30 13F COSTAR GROUP COM 22160N109 7,227 -5,187 -41.78 3,041 -40.63 0.0111
2018-08-14 2018-06-30 13F COSTAR GROUP COM 22160N109 12,414 3,806 44.21 5,122 64.06 0.0211
2018-05-15 2018-03-31 13F COSTAR GROUP COM 22160N109 8,608 8,608 3,122 0.0143
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.