COSTAR GROUP INC

Ticker: CSGP CUSIP: 22160N109 Class: EQTY

MASSACHUSETTS FINANCIAL SERVICES CO /MA/'s Holding History (CIK: 0000912938)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025

Shares 3,159,925 Value ($000) $212,473 Avg Close $70.84 Range $62.00 - $85.24

Q3 2025

Shares 7,406,788 Value ($000) $624,911 Avg Close $88.37 Range $79.94 - $97.43

Q2 2025

Shares 6,585,677 Value ($000) $529,488 Avg Close $77.90 Range $71.21 - $83.68

Q1 2025

Shares 6,619,472 Value ($000) $524,461 Avg Close $76.08 Range $68.41 - $83.03

Q4 2024

Shares 7,093,743 Value ($000) $507,841 Avg Close $75.52 Range $68.26 - $82.49

Q3 2024

Shares 11,380,192 Value ($000) $858,522 Avg Close $75.84 Range $70.86 - $81.63

Q2 2024

Shares 11,384,572 Value ($000) $844,052 Avg Close $84.75 Range $71.90 - $96.98

Q1 2024

Shares 11,502,919 Value ($000) $1,111,182 Avg Close $86.08 Range $79.82 - $100.38

Q4 2023

Shares 11,826,704 Value ($000) $1,033,536 Avg Close $80.94 Range $67.35 - $89.11

Q3 2023

Shares 11,967,040 Value ($000) $920,146 Avg Close $82.85 Range $75.78 - $92.30

Q2 2023

Shares 11,370,445 Value ($000) $1,011,970 Avg Close $77.21 Range $67.22 - $92.36

Q1 2023

Shares 11,542,549 Value ($000) $794,705 Avg Close $73.79 Range $65.12 - $81.15

Q4 2022

Shares 11,129,429 Value ($000) $860,082 Avg Close $78.14 Range $68.86 - $85.37

Q3 2022

Shares 10,492,550 Value ($000) $730,805 Avg Close $69.42 Range $57.54 - $79.26

Q2 2022

Shares 9,965,881 Value ($000) $602,039 Avg Close $60.57 Range $53.51 - $68.39

Q1 2022

Shares 9,316,688 Value ($000) $620,584 Avg Close $66.39 Range $49.00 - $79.73

Q4 2021

Shares 8,891,336 Value ($000) $702,683 Avg Close $83.91 Range $75.09 - $101.05

Q3 2021

Shares 8,462,994 Value ($000) $728,325 Avg Close $86.44 Range $80.00 - $90.85

Q2 2021

Shares 8,554,540 Value ($000) $708,487 Avg Close $86.45 Range $80.52 - $94.35

Q1 2021

Shares 868,210 Value ($000) $713,574 Avg Close $86.33 Range $74.31 - $95.28

Q4 2020

Shares 866,828 Value ($000) $801,191 Avg Close $87.68 Range $78.10 - $95.12

Q3 2020

Shares 747,412 Value ($000) $634,187 Avg Close $79.70 Range $66.20 - $93.90

Q2 2020

Shares 600,124 Value ($000) $426,489 Avg Close $64.65 Range $52.02 - $74.71

Q1 2020

Shares 511,336 Value ($000) $300,261 Avg Close $65.18 Range $50.02 - $74.67

Q4 2019

Shares 426,669 Value ($000) $255,276 Avg Close $58.38 Range $51.00 - $62.35

Q3 2019

Shares 313,389 Value ($000) $185,903 Avg Close $59.86 Range $55.57 - $63.94

Q2 2019

Shares 265,127 Value ($000) $146,897 Avg Close $51.11 Range $46.90 - $56.27

Q1 2019

Shares 218,255 Value ($000) $101,798 Avg Close $41.31 Range $32.51 - $48.49

Q4 2018

Shares 205,101 Value ($000) $69,189 Avg Close $36.53 Range $31.59 - $42.50

Q3 2018

Shares 177,511 Value ($000) $74,704 Avg Close $42.74 Range $39.71 - $44.84

Q2 2018

Shares 142,774 Value ($000) $58,914 Avg Close $38.48 Range $34.22 - $42.25

Q1 2018

Shares 98,614 Value ($000) $35,766 Avg Close $34.47 Range $29.54 - $37.86

Q4 2017

Shares 80,475 Value ($000) $23,897 Avg Close $29.30 Range $26.56 - $31.47

Q3 2017

Shares 58,597 Value ($000) $15,719 Avg Close $27.75 Range $25.54 - $28.80

Q2 2017

Shares 67,481 Value ($000) $17,788 Avg Close $24.32 Range $20.14 - $26.88

Q1 2017

Shares 95,162 Value ($000) $19,720 Avg Close $20.32 Range $18.49 - $21.24

Q4 2016

Shares 94,968 Value ($000) $17,900 Avg Close $19.64 Range $17.92 - $22.44

Q3 2016

Shares 120,177 Value ($000) $26,023 Avg Close $21.29 Range $20.25 - $22.48

Q2 2016

Shares 137,989 Value ($000) $30,172 Avg Close $19.77 Range $17.45 - $21.88

Q1 2016

Shares 140,918 Value ($000) $26,517 Avg Close $17.71 Range $14.65 - $20.50

Q4 2015

Shares 165,140 Value ($000) $34,133 Avg Close $19.90 Range $16.80 - $21.35

Q3 2015

Shares 164,579 Value ($000) $28,483 Avg Close $19.15 Range $16.35 - $22.35

Q2 2015

Shares 157,380 Value ($000) $31,674,298 Avg Close $20.39 Range $19.23 - $21.67

Q1 2015

Shares 188,084 Value ($000) $37,208,657 Avg Close $18.88 Range $16.88 - $20.19

Q4 2014

Shares 201,861 Value ($000) $37,067,735 Avg Close $16.16 Range $13.44 - $18.96

Q3 2014

Shares 317,636 Value ($000) $49,405 Avg Close $14.90 Range $13.85 - $16.58

Q2 2014

Shares 399,305 Value ($000) $63,158 Avg Close $16.20 Range $14.70 - $19.34

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	3,159,925	$212,473	$70.84	$62.00 - $85.24
Q3 2025	7,406,788	$624,911	$88.37	$79.94 - $97.43
Q2 2025	6,585,677	$529,488	$77.90	$71.21 - $83.68
Q1 2025	6,619,472	$524,461	$76.08	$68.41 - $83.03
Q4 2024	7,093,743	$507,841	$75.52	$68.26 - $82.49
Q3 2024	11,380,192	$858,522	$75.84	$70.86 - $81.63
Q2 2024	11,384,572	$844,052	$84.75	$71.90 - $96.98
Q1 2024	11,502,919	$1,111,182	$86.08	$79.82 - $100.38
Q4 2023	11,826,704	$1,033,536	$80.94	$67.35 - $89.11
Q3 2023	11,967,040	$920,146	$82.85	$75.78 - $92.30
Q2 2023	11,370,445	$1,011,970	$77.21	$67.22 - $92.36
Q1 2023	11,542,549	$794,705	$73.79	$65.12 - $81.15
Q4 2022	11,129,429	$860,082	$78.14	$68.86 - $85.37
Q3 2022	10,492,550	$730,805	$69.42	$57.54 - $79.26
Q2 2022	9,965,881	$602,039	$60.57	$53.51 - $68.39
Q1 2022	9,316,688	$620,584	$66.39	$49.00 - $79.73
Q4 2021	8,891,336	$702,683	$83.91	$75.09 - $101.05
Q3 2021	8,462,994	$728,325	$86.44	$80.00 - $90.85
Q2 2021	8,554,540	$708,487	$86.45	$80.52 - $94.35
Q1 2021	868,210	$713,574	$86.33	$74.31 - $95.28
Q4 2020	866,828	$801,191	$87.68	$78.10 - $95.12
Q3 2020	747,412	$634,187	$79.70	$66.20 - $93.90
Q2 2020	600,124	$426,489	$64.65	$52.02 - $74.71
Q1 2020	511,336	$300,261	$65.18	$50.02 - $74.67
Q4 2019	426,669	$255,276	$58.38	$51.00 - $62.35
Q3 2019	313,389	$185,903	$59.86	$55.57 - $63.94
Q2 2019	265,127	$146,897	$51.11	$46.90 - $56.27
Q1 2019	218,255	$101,798	$41.31	$32.51 - $48.49
Q4 2018	205,101	$69,189	$36.53	$31.59 - $42.50
Q3 2018	177,511	$74,704	$42.74	$39.71 - $44.84
Q2 2018	142,774	$58,914	$38.48	$34.22 - $42.25
Q1 2018	98,614	$35,766	$34.47	$29.54 - $37.86
Q4 2017	80,475	$23,897	$29.30	$26.56 - $31.47
Q3 2017	58,597	$15,719	$27.75	$25.54 - $28.80
Q2 2017	67,481	$17,788	$24.32	$20.14 - $26.88
Q1 2017	95,162	$19,720	$20.32	$18.49 - $21.24
Q4 2016	94,968	$17,900	$19.64	$17.92 - $22.44
Q3 2016	120,177	$26,023	$21.29	$20.25 - $22.48
Q2 2016	137,989	$30,172	$19.77	$17.45 - $21.88
Q1 2016	140,918	$26,517	$17.71	$14.65 - $20.50
Q4 2015	165,140	$34,133	$19.90	$16.80 - $21.35
Q3 2015	164,579	$28,483	$19.15	$16.35 - $22.35
Q2 2015	157,380	$31,674,298	$20.39	$19.23 - $21.67
Q1 2015	188,084	$37,208,657	$18.88	$16.88 - $20.19
Q4 2014	201,861	$37,067,735	$16.16	$13.44 - $18.96
Q3 2014	317,636	$49,405	$14.90	$13.85 - $16.58
Q2 2014	399,305	$63,158	$16.20	$14.70 - $19.34