CoStar Group, Inc.
MX ˙ BMV ˙ US22160N1090
DETTE SYMBOL ER IKKE LÆNGERE AKTIVT
SecurityMX:CSGP / CoStar Group, Inc.
InstitutionWellington Management Group Llp
Latest Disclosed Ownership1,701,692 shares
Ownership 4.67%
Wellington Management Group Llp ownership in CSGP / CoStar Group, Inc.

2019-02-12 - Wellington Management Group Llp has filed an SC 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 1,701,692 shares of CoStar Group, Inc. (MX:CSGP). This represents 4.67 percent ownership of the company. In their previous filing dated 2018-02-08 , Wellington Management Group Llp had reported owning 2,649,082 shares, indicating a decrease of -35.76 percent.

Institutional Ownership: 13D/G Filings

This table shows a history of the 13D/G filings made by the investor and/or investor group. Note that the share values in this table are not directly comparable to any numbers shown in the 13F table (if any).

File
Date
Effective
Date
Form Prev
Shares
Latest
Shares
ΔShares
(Percent)
Ownership
(Percent)
ΔOwnership
(Percent)
2019-02-12 2019-02-12 13G/A 2,649,082 1,701,692 -35.76 4.67 -36.29
2018-02-08 2018-02-08 13G 1,355,532 2,649,082 95.43 7.33 76.20
2017-02-09 2017-02-09 13G/A 3,058,832 1,355,532 -55.68 4.16 -55.84
2016-02-11 2016-02-11 13G 3,058,832 9.42

Important Note: One of the primary uses of the 13D/G filings is to evaluate the ability of a firm to control a company (ie, the "beneficial ownership"). To that end, firms are required to report not just direct holdings in companies, but indirect holdings that they control. For investment firms, these indirect holdings can include shares in funds they manage, advisory accounts, and in the case of activist campaigns, pledged votes. Therefore, share counts listed in 13D/G filings can differ significantly than share counts listed in 13F filings.

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 48,913 -4,755 -8.86 1,973 -45.32 0.0001
2026-02-17 2025-12-31 13F COSTAR GROUP COM 22160N109 53,668 -12,746 -19.19 3,609 -35.61 0.0006
2025-11-14 2025-09-30 13F COSTAR GROUP COM 22160N109 66,414 -20,442 -23.54 5,603 -19.76 0.0010
2025-08-14 2025-06-30 13F COSTAR GROUP COM 22160N109 86,856 -6,578 -7.04 6,983 -5.66 0.0013
2025-05-13 2025-03-31 13F COSTAR GROUP COM 22160N109 93,434 -28,681 -23.49 7,403 -15.33 0.0014
2025-02-12 2024-12-31 13F COSTAR GROUP COM 22160N109 122,115 -225,578 -64.88 8,742 -66.67 0.0016
2024-11-14 2024-09-30 13F COSTAR GROUP COM 22160N109 347,693 -254,349 -42.25 26,230 -41.24 0.0046
2024-08-14 2024-06-30 13F COSTAR GROUP COM 22160N109 602,042 -2,635,204 -81.40 44,635 -85.73 0.0080
2024-05-15 2024-03-31 13F COSTAR GROUP COM 22160N109 3,237,246 406,547 14.36 312,718 26.41 0.0554
2024-02-12 2023-12-31 13F COSTAR GROUP COM 22160N109 2,830,699 -749,850 -20.94 247,375 -10.15 0.0462
2023-11-14 2023-09-30 13F COSTAR GROUP COM 22160N109 3,580,549 662,592 22.71 275,308 6.01 0.0552
2023-08-14 2023-06-30 13F COSTAR GROUP COM 22160N109 2,917,957 1,013,035 53.18 259,698 98.01 0.0492
2023-05-12 2023-03-31 13F COSTAR GROUP COM 22160N109 1,904,922 -1,399,523 -42.35 131,154 -48.64 0.0260
2023-02-13 2022-12-31 13F COSTAR GROUP COM 22160N109 3,304,445 -79,853 -2.36 255,368 8.34 0.0512
2022-11-14 2022-09-30 13F COSTAR GROUP COM 22160N109 3,384,298 -121,072 -3.45 235,716 11.31 0.0502
2022-08-15 2022-06-30 13F COSTAR GROUP COM 22160N109 3,505,370 28,029 0.81 211,759 -8.58 0.0426
2022-05-16 2022-03-31 13F COSTAR GROUP COM 22160N109 3,477,341 1,178,764 51.28 231,626 27.51 0.0397
2022-02-11 2021-12-31 13F COSTAR GROUP COM 22160N109 2,298,577 -2,185,417 -48.74 181,656 -52.93 0.0291
2021-11-15 2021-09-30 13F COSTAR GROUP COM 22160N109 4,483,994 -342,479 -7.10 385,891 -3.46 0.0656
2021-08-16 2021-06-30 13F COSTAR GROUP COM 22160N109 4,826,473 4,337,416 886.89 399,728 -0.55 0.0665
2021-05-17 2021-03-31 13F COSTAR GROUP COM 22160N109 489,057 44,646 10.05 401,951 -2.14 0.0708
2021-02-12 2020-12-31 13F COSTAR GROUP COM 22160N109 444,411 -58,149 -11.57 410,761 -3.67 0.0756
2020-11-16 2020-09-30 13F COSTAR GROUP COM 22160N109 502,560 -234,083 -31.78 426,427 -18.54 0.0883
2020-08-14 2020-06-30 13F COSTAR GROUP COM 22160N109 736,643 75,647 11.44 523,510 34.88 0.1166
2020-05-14 2020-03-31 13F COSTAR GROUP COM 22160N109 660,996 224,155 51.31 388,144 48.51 0.1027
2020-02-11 2019-12-31 13F COSTAR GROUP COM 22160N109 436,841 -634,002 -59.21 261,362 -58.86 0.0548
2019-11-13 2019-09-30 13F COSTAR GROUP COM 22160N109 1,070,843 -290,145 -21.32 635,225 -15.76 0.1432
2019-08-14 2019-06-30 13F COSTAR GROUP COM 22160N109 1,360,988 -348,883 -20.40 754,069 -5.45 0.1669
2019-05-15 2019-03-31 13F COSTAR GROUP COM 22160N109 1,709,871 14,065 0.83 797,518 39.41 0.1806
2019-02-14 2018-12-31 13F COSTAR GROUP COM 22160N109 1,695,806 -224,798 -11.70 572,064 -29.22 0.1432
2018-11-14 2018-09-30 13F COSTAR GROUP COM 22160N109 1,920,604 -138,422 -6.72 808,267 -4.87 0.1702
2018-08-14 2018-06-30 13F COSTAR GROUP COM 22160N109 2,059,026 -393,243 -16.04 849,616 -4.47 0.1891
2018-05-15 2018-03-31 13F COSTAR GROUP COM 22160N109 2,452,269 -196,813 -7.43 889,389 13.06 0.2013
2018-02-13 2017-12-31 13F COSTAR GROUP COM 22160N109 2,649,082 -121,971 -4.40 786,645 5.83 0.1738
2017-11-13 2017-09-30 13F COSTAR GROUP COM 22160N109 2,771,053 544,242 24.44 743,335 26.64 0.1706
2017-08-14 2017-06-30 13F COSTAR GROUP COM 22160N109 2,226,811 367,376 19.76 586,988 52.34 0.1382
2017-05-11 2017-03-31 13F COSTAR GROUP COM 22160N109 1,859,435 503,903 37.17 385,312 50.80 0.0928
2017-02-14 2016-12-31 13F COSTAR GROUP COM 22160N109 1,355,532 -721,217 -34.73 255,504 -43.18 0.0641
2016-11-14 2016-09-30 13F COSTAR GROUP COM 22160N109 2,076,749 -75,721 -3.52 449,678 -4.46 0.1126
2016-08-15 2016-06-30 13F COSTAR GROUP COM 22160N109 2,152,470 -677,150 -23.93 470,660 -11.60 0.1217
2016-05-13 2016-03-31 13F COSTAR GROUP COM 22160N109 2,829,620 -229,212 -7.49 532,449 -15.78 0.1401
2016-02-12 2015-12-31 13F COSTAR GROUP COM 22160N109 3,058,832 -24,812 -0.80 632,231 18.47 0.1654
2015-11-16 2015-09-30 13F COSTAR GROUP COM 22160N109 3,083,644 393,261 14.62 533,656 -1.44 0.1488
2015-08-14 2015-06-30 13F COSTAR GROUP COM 22160N109 2,690,383 103,889 4.02 541,466 5.82 0.1397
2015-05-15 2015-03-31 13F COSTAR GROUP COM 22160N109 2,586,494 1,456,217 128.84 511,687 146.53 0.1316
2015-02-13 2014-12-31 13F COSTAR GROUP COM 22160N109 1,130,277 -12,037 -1.05 207,553 16.82 0.0549
2014-11-14 2014-09-30 13F COSTAR GROUP COM 22160N109 1,142,314 -53,921 -4.51 177,676 -6.09 0.0490
2014-08-14 2014-06-30 13F COSTAR GROUP COM 22160N109 1,196,235 371,071 44.97 189,208 22.79 0.0509
2014-05-15 2014-03-31 13F COSTARGROUP COM 22160N109 825,164 11,983 1.47 154,092 2.66 0.0428
2014-02-14 2013-12-31 13F COSTAR GROUP COM 22160N109 813,181 363,590 80.87 150,097 98.84 0.0432
2013-11-14 2013-09-30 13F COSTAR GROUP COM 22160N109 449,591 108,256 31.72 75,486 71.34 0.0236
2013-08-14 2013-06-30 13F COSTAR GROUP COM 22160N109 341,335 341,335 44,056 0.0144
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.