CoStar Group, Inc.
MX ˙ BMV ˙ US22160N1090
DETTE SYMBOL ER IKKE LÆNGERE AKTIVT
SecurityMX:CSGP / CoStar Group, Inc.
InstitutionHsbc Holdings Plc
Latest Disclosed Ownership1,346,906 shares
Latest Disclosed Value $ 54,386,025
Hsbc Holdings Plc ownership in CSGP / CoStar Group, Inc.

On April 30, 2026 - Hsbc Holdings Plc filed a 13F-HR form disclosing ownership of 1,346,906 shares of CoStar Group, Inc. (MX:CSGP) valued at $54,386,025 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on March 20, 2026 disclosing 987,270 shares of CoStar Group, Inc.. This represents a change in shares of 36.43% during the quarter.

Hsbc Holdings Plc has a history of taking positions in derivatives of the underlying security (CSGP) in the form of stock options. The firm currently holds call options representing 18,500 of underlying shares valued at $746,290 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

MX:CSGP / CoStar Group, Inc. Historical Put/Call Ratio
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)
2026-04-30 2026-03-31 13F COSTAR GROUP COM 22160N109 1,346,906 359,636 36.43 54,386 -18.08 0.0038
2026-03-20 2025-12-31 13F/A-1 COSTAR GROUP COM 22160N109 987,270 269,950 37.63 66,392 10.00 0.0036
2026-03-06 2025-12-31 13F COSTAR GROUP COM 22160N109 987,270 269,950 37.63 66,392 10.00 0.0030
2025-11-13 2025-09-30 13F COSTAR GROUP COM 22160N109 717,320 8,932 1.26 60,359 6.05 0.0333
2025-08-13 2025-06-30 13F COSTAR GROUP COM 22160N109 708,388 -51,903 -6.83 56,918 -5.40 0.0342
2025-05-14 2025-03-31 13F COSTAR GROUP COM 22160N109 760,291 -135,558 -15.13 60,165 -6.21 0.0372
2025-02-14 2024-12-31 13F COSTAR GROUP COM 22160N109 895,849 35,360 4.11 64,148 -1.22 0.0373
2024-11-14 2024-09-30 13F COSTAR GROUP COM 22160N109 860,489 -29,858 -3.35 64,943 -1.60 0.0378
2024-08-12 2024-06-30 13F COSTAR GROUP COM 22160N109 890,347 227,509 34.32 66,000 3.10 0.0404
2024-05-15 2024-03-31 13F COSTAR GROUP COM 22160N109 662,838 75,652 12.88 64,013 24.71 0.0433
2024-02-12 2023-12-31 13F COSTAR GROUP COM 22160N109 587,186 17,387 3.05 51,329 17.21 0.0448
2023-11-13 2023-09-30 13F COSTAR GROUP COM 22160N109 569,799 121,099 26.99 43,791 8.46 0.0456
2023-08-11 2023-06-30 13F COSTAR GROUP COM 22160N109 448,700 88,969 24.73 40,376 63.17 0.0411
2023-05-15 2023-03-31 13F COSTAR GROUP COM 22160N109 359,731 -93,578 -20.64 24,744 -29.13 0.0296
2023-02-14 2022-12-31 13F COSTAR GROUP COM 22160N109 453,309 172,031 61.16 34,917 76.12 0.0401
2022-11-14 2022-09-30 13F COSTAR GROUP COM 22160N109 281,278 168,733 149.92 19,826 191.73 0.0323
2022-08-11 2022-06-30 13F COSTAR GROUP COM 22160N109 112,545 -107,483 -48.85 6,796 -54.10 0.0095
2022-05-16 2022-03-31 13F COSTAR GROUP COM 22160N109 220,028 65,539 42.42 14,805 20.95 0.0180
2022-02-11 2021-12-31 13F COSTAR GROUP COM 22160N109 154,489 12,761 9.00 12,241 0.40 0.0113
2021-11-12 2021-09-30 13F COSTAR GROUP COM 22160N109 141,728 -60,236 -29.83 12,192 -27.28 0.0123
2021-08-13 2021-06-30 13F COSTAR GROUP COM 22160N109 201,964 185,467 1,124.25 16,765 23.65 0.0179
2021-05-14 2021-03-31 13F COSTAR GROUP COM 22160N109 16,497 -390 -2.31 13,558 -13.12 0.0159
2021-02-25 2020-12-31 13F/A-1 COSTAR GROUP COM 22160N109 16,887 -11,904 -41.35 15,606 -36.31 0.0208
2021-02-12 2020-12-31 13F COSTAR GROUP COM 22160N109 16,887 -11,904 15,606 3,705.4380
2020-11-12 2020-09-30 13F COSTAR GROUP COM 22160N109 28,791 -5,189 -15.27 24,502 1.47 0.0391
2020-08-14 2020-06-30 13F COSTAR GROUP COM 22160N109 33,980 9,793 40.49 24,148 69.38 0.0458
2020-05-15 2020-03-31 13F COSTAR GROUP COM 22160N109 24,187 52 0.22 14,257 -1.25 0.0331
2020-02-14 2019-12-31 13F COSTAR GROUP COM 22160N109 24,135 -2,863 -10.60 14,438 -9.85 0.0251
2019-11-14 2019-09-30 13F COSTAR GROUP COM 22160N109 26,998 16,687 161.84 16,016 180.34 0.0299
2019-08-13 2019-06-30 13F COSTAR GROUP COM 22160N109 10,311 2,022 24.39 5,713 47.78 0.0108
2019-05-15 2019-03-31 13F COSTAR GROUP COM 22160N109 8,289 1,036 14.28 3,866 57.99 0.0071
2019-02-13 2018-12-31 13F COSTAR GROUP COM 22160N109 7,253 -145 -1.96 2,447 -21.39 0.0045
2018-11-13 2018-09-30 13F COSTAR GROUP COM 22160N109 7,398 -2,302 -23.73 3,113 -22.14 0.0050
2018-08-10 2018-06-30 13F COSTAR GROUP COM 22160N109 9,700 3,517 56.88 3,998 78.24 0.0071
2018-05-11 2018-03-31 13F COSTAR GROUP COM 22160N109 6,183 -1,093 -15.02 2,243 3.79 0.0033
2018-02-14 2017-12-31 13F COSTAR GROUP COM 22160N109 7,276 429 6.27 2,161 17.70 0.0031
2017-11-14 2017-09-30 13F COSTAR GROUP COM 22160N109 6,847 -749 -9.86 1,836 -8.34 0.0029
2017-08-14 2017-06-30 13F COSTAR GROUP COM 22160N109 7,596 320 4.40 2,003 32.82 0.0037
2017-05-15 2017-03-31 13F COSTAR GROUP COM 22160N109 7,276 677 10.26 1,508 21.32 0.0032
2017-02-09 2016-12-31 13F COSTAR GROUP COM 22160N109 6,599 3,271 98.29 1,243 72.64 0.0029
2016-11-14 2016-09-30 13F COSTAR GROUP COM 22160N109 3,328 -639 -16.11 720 -17.05 0.0018
2016-08-12 2016-06-30 13F COSTAR GROUP COM 22160N109 3,967 -410 -9.37 868 5.47 0.0024
2016-05-13 2016-03-31 13F COSTAR GROUP COM 22160N109 4,377 -372 -7.83 823 -16.11 0.0023
2016-02-12 2015-12-31 13F COSTAR GROUP COM 22160N109 4,749 418 9.65 981 30.80 0.0024
2015-11-12 2015-09-30 13F COSTAR GROUP COM 22160N109 4,331 -108 -2.43 750 -16.11 0.0019
2015-08-13 2015-06-30 13F COSTAR GROUP COM 22160N109 4,439 -98 -2.16 894 -0.45 0.0018
2015-05-14 2015-03-31 13F COSTAR GROUP COM 22160N109 4,537 930 25.78 898 35.65 0.0017
2015-02-13 2014-12-31 13F COSTAR GROUP COM 22160N109 3,607 329 10.04 662 29.80 0.0014
2014-11-18 2014-09-30 13F COSTAR GROUP COM 22160N109 3,278 -1,873 -36.36 510 -37.35 0.0011
2014-08-14 2014-06-30 13F COSTAR GROUP COM 22160N109 5,151 2,705 110.59 814 78.12 0.0018
2014-05-14 2014-03-31 13F COSTAR GROUP COM 22160N109 2,446 157 6.86 457 8.29 0.0011
2014-02-14 2013-12-31 13F COSTAR GROUP COM 22160N109 2,289 -254 -9.99 422 -1.17 0.0011
2013-11-14 2013-09-30 13F COSTAR GROUP COM 22160N109 2,543 865 51.55 427 97.69 0.0012
2013-10-10 2013-06-30 13F/A-1 COSTAR GROUP COM 22160N109 1,678 1,678 216 0.0007
2013-08-14 2013-06-30 13F COSTAR GROUP COM 22160N109 1,678 216 0.0007
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-04-30 2026-03-31 13F COSTAR GROUP COM Call 18,500 0.00 746 -39.98 n/a n/a n/a
2026-03-20 2025-12-31 13F/A COSTAR GROUP COM Call 18,500 1.65 1,244 -19.02 n/a n/a n/a
2026-03-06 2025-12-31 13F COSTAR GROUP COM Call 0 -100.00 0 n/a n/a n/a
2025-11-13 2025-09-30 13F COSTAR GROUP COM Call 18,200 -41.48 1,536 -37.70 n/a n/a n/a
2025-08-13 2025-06-30 13F COSTAR GROUP COM Call 31,100 0.00 2,464 0.00 n/a n/a n/a
2025-05-14 2025-03-31 13F COSTAR GROUP COM Call 31,100 0.00 2,464 10.69 n/a n/a n/a
2025-02-14 2024-12-31 13F COSTAR GROUP COM Call 31,100 -15.03 2,226 -19.38 n/a n/a n/a
2024-11-14 2024-09-30 13F COSTAR GROUP COM Call 36,600 0.00 2,761 1.62 n/a n/a n/a
2024-08-12 2024-06-30 13F COSTAR GROUP COM Call 36,600 4.57 2,718 -19.64 n/a n/a n/a
2024-05-15 2024-03-31 13F COSTAR GROUP COM Call 35,000 0.00 3,381 10.56 n/a n/a n/a
2024-02-12 2023-12-31 13F COSTAR GROUP COM Call 35,000 3,059 n/a n/a n/a
2023-11-13 2023-09-30 13F COSTAR GROUP COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2023-08-11 2023-06-30 13F COSTAR GROUP COM Call 28,500 16.33 2,568 53.86 n/a n/a n/a
2023-05-15 2023-03-31 13F COSTAR GROUP COM Call 24,500 1,670 n/a n/a n/a
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.