CoStar Group, Inc.
MX ˙ BMV ˙ US22160N1090
DETTE SYMBOL ER IKKE LÆNGERE AKTIVT
SecurityMX:CSGP / CoStar Group, Inc.
InstitutionPeregrine Capital Management Llc
Latest Disclosed Ownership699,152 shares
Latest Disclosed Value $ 28,203,792
Peregrine Capital Management Llc reports 6.64% decrease in ownership of CSGP / CoStar Group, Inc.

On April 23, 2026 - Peregrine Capital Management Llc filed a 13F-HR form disclosing ownership of 699,152 shares of CoStar Group, Inc. (MX:CSGP) valued at $28,203,792 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 28, 2026 disclosing 748,873 shares of CoStar Group, Inc.. This represents a change in shares of -6.64% 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)
2026-04-23 2026-03-31 13F COSTAR GROUP COM 22160N109 699,152 -49,721 -6.64 28,204 -43.99 1.0463
2026-01-28 2025-12-31 13F COSTAR GROUP COM 22160N109 748,873 -11,963 -1.57 50,354 -21.56 1.5439
2025-10-23 2025-09-30 13F COSTAR GROUP COM 22160N109 760,836 60,293 8.61 64,192 13.97 1.9321
2025-08-01 2025-06-30 13F COSTAR GROUP COM 22160N109 700,543 -38,854 -5.25 56,324 -3.86 1.6975
2025-04-25 2025-03-31 13F COSTAR GROUP COM 22160N109 739,397 140,742 23.51 58,582 36.69 1.9442
2025-01-31 2024-12-31 13F COSTAR GROUP COM 22160N109 598,655 -28,096 -4.48 42,858 -9.36 1.2684
2024-10-24 2024-09-30 13F COSTAR GROUP COM 22160N109 626,751 -5,597 -0.89 47,282 0.85 1.4276
2024-07-29 2024-06-30 13F COSTAR GROUP COM 22160N109 632,348 12,094 1.95 46,882 -21.75 1.3689
2024-04-26 2024-03-31 13F COSTAR GROUP COM 22160N109 620,254 -10,242 -1.62 59,917 8.74 1.7173
2024-01-26 2023-12-31 13F COSTAR GROUP COM 22160N109 630,496 -23,922 -3.66 55,099 9.50 1.6561
2023-10-19 2023-09-30 13F COSTAR GROUP COM 22160N109 654,418 -356 -0.05 50,318 -13.65 1.5019
2023-07-26 2023-06-30 13F COSTAR GROUP COM 22160N109 654,774 -4,726 -0.72 58,275 28.34 1.5852
2023-04-26 2023-03-31 13F COSTAR GROUP COM 22160N109 659,500 3,904 0.60 45,407 90,712.00 1.3104
2023-01-10 2022-12-31 13F COSTAR GROUP COM 22160N109 655,596 9,810 1.52 51 -99.89 1.5889
2022-10-26 2022-09-30 13F COSTAR GROUP COM 22160N109 645,786 39,889 6.58 44,979 22.89 1.4568
2022-07-20 2022-06-30 13F COSTAR GROUP COM 22160N109 605,897 -36,176 -5.63 36,602 -14.42 1.1034
2022-04-27 2022-03-31 13F COSTAR GROUP COM 22160N109 642,073 3,473 0.54 42,768 -15.26 1.0133
2022-01-31 2021-12-31 13F COSTAR GROUP COM 22160N109 638,600 53,380 9.12 50,469 0.21 1.0111
2021-11-02 2021-09-30 13F COSTAR GROUP COM 22160N109 585,220 -4,740 -0.80 50,364 3.08 1.0442
2021-08-03 2021-06-30 13F COSTAR GROUP COM 22160N109 589,960 533,668 948.04 48,860 5.61 0.8761
2021-05-11 2021-03-31 13F COSTAR GROUP COM 22160N109 56,292 3,857 7.36 46,266 -4.54 0.8578
2021-01-19 2020-12-31 13F COSTAR GROUP COM 22160N109 52,435 -2,915 -5.27 48,465 3.19 0.9213
2020-10-20 2020-09-30 13F COSTAR GROUP COM 22160N109 55,350 326 0.59 46,965 20.10 1.2452
2020-07-30 2020-06-30 13F COSTAR GROUP COM 22160N109 55,024 1,772 3.33 39,104 25.05 1.1113
2020-04-17 2020-03-31 13F COSTAR GROUP COM 22160N109 53,252 429 0.81 31,270 -1.06 1.1208
2020-01-16 2019-12-31 13F COSTAR GROUP COM 22160N109 52,823 205 0.39 31,604 1.25 0.8050
2019-10-16 2019-09-30 13F COSTAR GROUP COM 22160N109 52,618 -6,236 -10.60 31,213 -4.28 0.8491
2019-07-18 2019-06-30 13F COSTAR GROUP COM 22160N109 58,854 -2,902 -4.70 32,609 13.21 0.8049
2019-04-12 2019-03-31 13F COSTAR GROUP COM 22160N109 61,756 736 1.21 28,804 39.93 0.7207
2019-01-17 2018-12-31 13F COSTAR GROUP COM 22160N109 61,020 1,489 2.50 20,584 -17.84 0.5802
2018-10-18 2018-09-30 13F COSTAR GROUP COM 22160N109 59,531 0 0.00 25,053 1.99 0.5937
2018-07-12 2018-06-30 13F COSTAR GROUP COM 22160N109 59,531 174 0.29 24,564 14.10 0.6137
2018-04-16 2018-03-31 13F COSTAR GROUP COM 22160N109 59,357 -219 -0.37 21,528 21.69 0.5263
2018-01-24 2017-12-31 13F COSTAR GROUP COM 22160N109 59,576 0 0.00 17,691 10.70 0.4160
2017-10-25 2017-09-30 13F COSTAR GROUP COM 22160N109 59,576 0 0.00 15,981 1.76 0.3834
2017-07-19 2017-06-30 13F COSTAR GROUP COM 22160N109 59,576 0 0.00 15,704 26.04 0.3915
2017-04-07 2017-03-31 13F COSTAR GROUP COM 22160N109 59,576 -17,697 -22.90 12,460 -14.45 0.3168
2017-02-09 2016-12-31 13F COSTAR GROUP COM 22160N109 77,273 0 0.00 14,565 -12.95 0.3779
2016-10-31 2016-09-30 13F COSTAR GROUP COM 22160N109 77,273 77,273 16,732 0.4360
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.