COSTAR GROUP INC

Ticker: CSGP CUSIP: 22160N109 Class: EQTY

KORNITZER CAPITAL MANAGEMENT INC /KS's Holding History (CIK: 0000898358)

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

Q4 2025

Shares 224,416 Value ($000) $15,090 Avg Close $70.84 Range $62.00 - $85.24

Q3 2025

Shares 231,626 Value ($000) $19,542 Avg Close $88.37 Range $79.94 - $97.43

Q2 2025

Shares 269,856 Value ($000) $21,696 Avg Close $77.90 Range $71.21 - $83.68

Q1 2025

Shares 309,981 Value ($000) $24,560 Avg Close $76.08 Range $68.41 - $83.03

Q4 2024

Shares 310,196 Value ($000) $22,207 Avg Close $75.52 Range $68.26 - $82.49

Q3 2024

Shares 318,616 Value ($000) $24,036 Avg Close $75.84 Range $70.86 - $81.63

Q2 2024

Shares 286,326 Value ($000) $21,228 Avg Close $84.75 Range $71.90 - $96.98

Q1 2024

Shares 286,076 Value ($000) $27,635 Avg Close $86.08 Range $79.82 - $100.38

Q4 2023

Shares 293,874 Value ($000) $25,682 Avg Close $80.94 Range $67.35 - $89.11

Q3 2023

Shares 298,924 Value ($000) $22,984 Avg Close $82.85 Range $75.78 - $92.30

Q2 2023

Shares 299,174 Value ($000) $26,626 Avg Close $77.21 Range $67.22 - $92.36

Q1 2023

Shares 300,974 Value ($000) $20,722 Avg Close $73.79 Range $65.12 - $81.15

Q4 2022

Shares 362,709 Value ($000) $28,030 Avg Close $78.14 Range $68.86 - $85.37

Q3 2022

Shares 367,631 Value ($000) $25,605 Avg Close $69.42 Range $57.54 - $79.26

Q2 2022

Shares 381,870 Value ($000) $23,069 Avg Close $60.57 Range $53.51 - $68.39

Q1 2022

Shares 425,695 Value ($000) $28,356 Avg Close $66.39 Range $49.00 - $79.73

Q4 2021

Shares 427,905 Value ($000) $33,817 Avg Close $83.91 Range $75.09 - $101.05

Q3 2021

Shares 428,575 Value ($000) $36,883 Avg Close $86.44 Range $80.00 - $90.85

Q2 2021

Shares 426,290 Value ($000) $35,305 Avg Close $86.45 Range $80.52 - $94.35

Q1 2021

Shares 42,629 Value ($000) $35,036 Avg Close $86.33 Range $74.31 - $95.28

Q4 2020

Shares 42,629 Value ($000) $39,401 Avg Close $87.68 Range $78.10 - $95.12

Q3 2020

Shares 42,629 Value ($000) $36,171 Avg Close $79.70 Range $66.20 - $93.90

Q2 2020

Shares 48,536 Value ($000) $34,493 Avg Close $64.65 Range $52.02 - $74.71

Q1 2020

Shares 50,710 Value ($000) $29,777 Avg Close $65.18 Range $50.02 - $74.67

Q4 2019

Shares 52,279 Value ($000) $31,279 Avg Close $58.38 Range $51.00 - $62.35

Q3 2019

Shares 54,990 Value ($000) $32,620 Avg Close $59.86 Range $55.57 - $63.94

Q2 2019

Shares 68,554 Value ($000) $37,983 Avg Close $51.11 Range $46.90 - $56.27

Q1 2019

Shares 64,955 Value ($000) $30,296 Avg Close $41.31 Range $32.51 - $48.49

Q4 2018

Shares 15,366 Value ($000) $5,184 Avg Close $36.53 Range $31.59 - $42.50

Q3 2018

Shares 15,004 Value ($000) $6,314 Avg Close $42.74 Range $39.71 - $44.84

Q2 2018

Shares 15,035 Value ($000) $6,204 Avg Close $38.48 Range $34.22 - $42.25

Q1 2018

Shares 15,309 Value ($000) $5,552 Avg Close $34.47 Range $29.54 - $37.86

Q4 2017

Shares 15,694 Value ($000) $4,660 Avg Close $29.30 Range $26.56 - $31.47

Q3 2017

Shares 15,819 Value ($000) $4,243 Avg Close $27.75 Range $25.54 - $28.80

Q2 2017

Shares 33,084 Value ($000) $8,721 Avg Close $24.32 Range $20.14 - $26.88

Q1 2017

Shares 86,804 Value ($000) $17,988 Avg Close $20.32 Range $18.49 - $21.24

Q4 2016

Shares 101,114 Value ($000) $19,059 Avg Close $19.64 Range $17.92 - $22.44

Q3 2016

Shares 110,909 Value ($000) $24,015 Avg Close $21.29 Range $20.25 - $22.48

Q2 2016

Shares 121,484 Value ($000) $26,564 Avg Close $19.77 Range $17.45 - $21.88

Q1 2016

Shares 156,319 Value ($000) $29,415 Avg Close $17.71 Range $14.65 - $20.50

Q4 2015

Shares 133,729 Value ($000) $27,640 Avg Close $19.90 Range $16.80 - $21.35

Q3 2015

Shares 181,959 Value ($000) $31,490 Avg Close $19.15 Range $16.35 - $22.35

Q2 2015

Shares 312,476 Value ($000) $62,889 Avg Close $20.39 Range $19.23 - $21.67

Q1 2015

Shares 525,879 Value ($000) $104,035 Avg Close $18.88 Range $16.88 - $20.19

Q4 2014

Shares 531,189 Value ($000) $97,542 Avg Close $16.16 Range $13.44 - $18.96

Q3 2014

Shares 593,654 Value ($000) $92,337 Avg Close $14.90 Range $13.85 - $16.58

Q2 2014

Shares 669,775 Value ($000) $105,938 Avg Close $16.20 Range $14.70 - $19.34

Q1 2014

Shares 673,625 Value ($000) $125,793 Avg Close $18.86 Range $16.38 - $21.82

Q4 2013

Shares 675,190 Value ($000) $124,627 Avg Close $17.69 Range $16.07 - $18.84

Q3 2013

Shares 746,560 Value ($000) $125,356 Avg Close $15.34 Range $12.98 - $17.22

Q2 2013

Shares 771,360 Value ($000) $99,559 Avg Close $11.32 Range $10.46 - $13.07

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	224,416	$15,090	$70.84	$62.00 - $85.24
Q3 2025	231,626	$19,542	$88.37	$79.94 - $97.43
Q2 2025	269,856	$21,696	$77.90	$71.21 - $83.68
Q1 2025	309,981	$24,560	$76.08	$68.41 - $83.03
Q4 2024	310,196	$22,207	$75.52	$68.26 - $82.49
Q3 2024	318,616	$24,036	$75.84	$70.86 - $81.63
Q2 2024	286,326	$21,228	$84.75	$71.90 - $96.98
Q1 2024	286,076	$27,635	$86.08	$79.82 - $100.38
Q4 2023	293,874	$25,682	$80.94	$67.35 - $89.11
Q3 2023	298,924	$22,984	$82.85	$75.78 - $92.30
Q2 2023	299,174	$26,626	$77.21	$67.22 - $92.36
Q1 2023	300,974	$20,722	$73.79	$65.12 - $81.15
Q4 2022	362,709	$28,030	$78.14	$68.86 - $85.37
Q3 2022	367,631	$25,605	$69.42	$57.54 - $79.26
Q2 2022	381,870	$23,069	$60.57	$53.51 - $68.39
Q1 2022	425,695	$28,356	$66.39	$49.00 - $79.73
Q4 2021	427,905	$33,817	$83.91	$75.09 - $101.05
Q3 2021	428,575	$36,883	$86.44	$80.00 - $90.85
Q2 2021	426,290	$35,305	$86.45	$80.52 - $94.35
Q1 2021	42,629	$35,036	$86.33	$74.31 - $95.28
Q4 2020	42,629	$39,401	$87.68	$78.10 - $95.12
Q3 2020	42,629	$36,171	$79.70	$66.20 - $93.90
Q2 2020	48,536	$34,493	$64.65	$52.02 - $74.71
Q1 2020	50,710	$29,777	$65.18	$50.02 - $74.67
Q4 2019	52,279	$31,279	$58.38	$51.00 - $62.35
Q3 2019	54,990	$32,620	$59.86	$55.57 - $63.94
Q2 2019	68,554	$37,983	$51.11	$46.90 - $56.27
Q1 2019	64,955	$30,296	$41.31	$32.51 - $48.49
Q4 2018	15,366	$5,184	$36.53	$31.59 - $42.50
Q3 2018	15,004	$6,314	$42.74	$39.71 - $44.84
Q2 2018	15,035	$6,204	$38.48	$34.22 - $42.25
Q1 2018	15,309	$5,552	$34.47	$29.54 - $37.86
Q4 2017	15,694	$4,660	$29.30	$26.56 - $31.47
Q3 2017	15,819	$4,243	$27.75	$25.54 - $28.80
Q2 2017	33,084	$8,721	$24.32	$20.14 - $26.88
Q1 2017	86,804	$17,988	$20.32	$18.49 - $21.24
Q4 2016	101,114	$19,059	$19.64	$17.92 - $22.44
Q3 2016	110,909	$24,015	$21.29	$20.25 - $22.48
Q2 2016	121,484	$26,564	$19.77	$17.45 - $21.88
Q1 2016	156,319	$29,415	$17.71	$14.65 - $20.50
Q4 2015	133,729	$27,640	$19.90	$16.80 - $21.35
Q3 2015	181,959	$31,490	$19.15	$16.35 - $22.35
Q2 2015	312,476	$62,889	$20.39	$19.23 - $21.67
Q1 2015	525,879	$104,035	$18.88	$16.88 - $20.19
Q4 2014	531,189	$97,542	$16.16	$13.44 - $18.96
Q3 2014	593,654	$92,337	$14.90	$13.85 - $16.58
Q2 2014	669,775	$105,938	$16.20	$14.70 - $19.34
Q1 2014	673,625	$125,793	$18.86	$16.38 - $21.82
Q4 2013	675,190	$124,627	$17.69	$16.07 - $18.84
Q3 2013	746,560	$125,356	$15.34	$12.98 - $17.22
Q2 2013	771,360	$99,559	$11.32	$10.46 - $13.07