CoStar Group, Inc.
US ˙ NasdaqGS ˙ US22160N1090

SecurityCSGP / CoStar Group, Inc.
InstitutionAperio Group, LLC
Latest Disclosed Ownership16,459 shares
Latest Disclosed Value $ 15,213,000
Aperio Group, LLC reports 2.97% increase in ownership of CSGP / CoStar Group, Inc.

On February 5, 2021 - Aperio Group, LLC filed a 13F-HR form disclosing ownership of 16,459 shares of CoStar Group, Inc. (US:CSGP) valued at $1,521,272 USD as of December 31, 2020. The entity filed a previous 13F-HR on November 6, 2020 disclosing 15,984 shares of CoStar Group, Inc.. This represents a change in shares of 2.97% during the quarter. The current value of the position is $557,796 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)
2021-02-05 2020-12-31 13F COSTAR GROUP COM 22160N109 16,459 475 2.97 15,213 12.17 0.0450
2020-11-06 2020-09-30 13F COSTAR GROUP COM 22160N109 15,984 444 2.86 13,563 22.81 0.0458
2020-08-13 2020-06-30 13F COSTAR GROUP COM 22160N109 15,540 -720 -4.43 11,044 15.67 0.0408
2020-05-05 2020-03-31 13F COSTAR GROUP COM 22160N109 16,260 1,563 10.63 9,548 8.59 0.0422
2020-02-13 2019-12-31 13F COSTAR GROUP COM 22160N109 14,697 225 1.55 8,793 2.42 0.0316
2019-11-06 2019-09-30 13F COSTAR GROUP COM 22160N109 14,472 215 1.51 8,585 8.67 0.0339
2019-07-30 2019-06-30 13F COSTAR GROUP COM 22160N109 14,257 232 1.65 7,900 20.78 0.0323
2019-05-13 2019-03-31 13F COSTAR GROUP COM 22160N109 14,025 563 4.18 6,541 44.04 0.0282
2019-05-06 2018-12-31 13F/A-1 COSTAR GROUP COM 22160N109 13,462 -123 -0.91 4,541 -20.57 0.0229
2019-02-14 2018-12-31 13F COSTAR GROUP COM 22160N109 13,425 -160 4,529
2019-05-06 2018-09-30 13F/A-1 COSTAR GROUP COM 22160N109 13,585 1,097 8.78 5,717 10.95 0.0252
2018-10-17 2018-09-30 13F COSTAR GROUP INC COM COMMON 22160N109 13,585 1,097 5,717
2019-05-06 2018-06-30 13F/A-1 COSTAR GROUP COM 22160N109 12,488 622 5.24 5,153 19.75 0.0246
2018-07-30 2018-06-30 13F COSTAR GROUP INC COM COMMON 22160N109 12,488 622 5,153
2019-05-01 2018-03-31 13F/A-1 COSTAR GROUP COM 22160N109 11,866 1,441 13.82 4,303 39.03 0.0214
2018-05-08 2018-03-31 13F COSTAR GROUP INC COM COMMON 22160N109 11,866 1,441 4,304
2019-05-01 2017-12-31 13F/A-1 COSTAR GROUP COM 22160N109 10,425 2,383 29.63 3,095 43.49 0.0160
2018-02-02 2017-12-31 13F COSTAR GROUP INC COM COMMON 22160N109 10,425 2,383 3,096
2019-05-01 2017-09-30 13F/A-1 COSTAR GROUP COM 22160N109 8,042 553 7.38 2,157 9.27 0.0122
2017-10-25 2017-09-30 13F COSTAR GROUP INC COM COMMON 22160N109 8,042 553 2,157
2019-04-22 2017-06-30 13F/A-1 COSTAR GROUP COM 22160N109 7,489 1,047 16.25 1,974 47.87 0.0121
2017-07-18 2017-06-30 13F COSTAR GROUP INC COM COMMON 22160N109 7,489 1,047 1,974
2019-04-22 2017-03-31 13F/A-1 COSTAR GROUP COM 22160N109 6,442 284 4.61 1,335 14.99 0.0091
2017-05-05 2017-03-31 13F COSTAR GROUP INC COM COMMON 22160N109 6,442 284 1,335
2019-04-22 2016-12-31 13F/A-1 COSTAR GROUP COM 22160N109 6,158 -2,425 -28.25 1,161 -37.51 0.0089
2017-02-14 2016-12-31 13F COSTAR GROUP INC COM COMMON 22160N109 6,158 -2,425 1,161
2019-04-12 2016-09-30 13F/A-1 COSTAR GROUP COM 22160N109 8,583 169 2.01 1,858 1.03 0.0135
2016-11-01 2016-09-30 13F COSTAR GROUP INC COM COMMON 22160N109 8,583 169 1,858
2019-04-12 2016-06-30 13F/A-1 COSTAR GROUP COM 22160N109 8,414 1,663 24.63 1,839 44.80 0.0144
2016-08-12 2016-06-30 13F COSTAR GROUP INC COM COMMON 22160N109 8,414 1,663 1,840
2019-04-12 2016-03-31 13F/A-1 COSTAR GROUP COM 22160N109 6,751 888 15.15 1,270 4.79 0.0109
2016-04-28 2016-03-31 13F COSTAR GROUP INC COM COMMON 22160N109 6,751 888 1,270
2016-01-21 2015-12-31 13F COSTAR GROUP INC COM COMMON 22160N109 5,863 537 10.08 1,212 31.45 0.0111
2015-10-19 2015-09-30 13F COSTAR GROUP INC COM COMMON 22160N109 5,326 296 5.88 922 -8.89 0.0094
2015-07-29 2015-06-30 13F COSTAR GROUP INC COM COMMON 22160N109 5,030 285 6.01 1,012 7.77 0.0104
2015-04-29 2015-03-31 13F COSTAR GROUP INC COM COMMON 22160N109 4,745 4,745 0.00 939 0.0105
2015-01-30 2014-12-31 13F COSTAR GROUP INC COM COMMON 22160N109 0 -3,864 -100.00 0 -100.00
2014-10-21 2014-09-30 13F COSTAR GROUP INC COM COMMON 22160N109 3,864 -9 -0.23 601 -1.96 0.0081
2014-07-23 2014-06-30 13F COSTAR GROUP INC COM COMMON 22160N109 3,873 308 8.64 613 -7.96 0.0089
2014-04-25 2014-03-31 13F COSTAR GROUP INC COM COMMON 22160N109 3,565 666 0.91 0.0094
2014-01-30 2013-12-31 13F COSTAR GROUP INC COM COMMON 22160N109 660 89.11 0.0102
2013-10-24 2013-09-30 13F COSTAR GROUP INC COM COMMON 22160N109 2,078 63 3.13 349 34.23 0.0067
2013-07-19 2013-06-30 13F COSTAR GROUP INC COM COMMON 22160N109 2,015 260
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.