COSTAR GROUP INC

Ticker: CSGP CUSIP: 22160N109 Class: EQTY

Granahan Investment Management, LLC's Holding History (CIK: 0001026710)

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

Q4 2025

Shares 91,929 Value ($000) $6,181 Avg Close $70.84 Range $62.00 - $85.24

Q3 2025

Shares 270,166 Value ($000) $22,794 Avg Close $88.37 Range $79.94 - $97.43

Q2 2025

Shares 300,932 Value ($000) $24,195 Avg Close $77.90 Range $71.21 - $83.68

Q1 2025

Shares 347,693 Value ($000) $27,548 Avg Close $76.08 Range $68.41 - $83.03

Q4 2024

Shares 358,206 Value ($000) $25,644 Avg Close $75.52 Range $68.26 - $82.49

Q3 2024

Shares 363,332 Value ($000) $27,410 Avg Close $75.84 Range $70.86 - $81.63

Q2 2024

Shares 423,426 Value ($000) $31,393 Avg Close $84.75 Range $71.90 - $96.98

Q1 2024

Shares 610,998 Value ($000) $59,022 Avg Close $86.08 Range $79.82 - $100.38

Q4 2023

Shares 712,084 Value ($000) $62,229 Avg Close $80.94 Range $67.35 - $89.11

Q3 2023

Shares 765,134 Value ($000) $58,831 Avg Close $82.85 Range $75.78 - $92.30

Q2 2023

Shares 791,468 Value ($000) $70,441 Avg Close $77.21 Range $67.22 - $92.36

Q1 2023

Shares 794,943 Value ($000) $54,732 Avg Close $73.79 Range $65.12 - $81.15

Q4 2022

Shares 1,366,862 Value ($000) $105,631 Avg Close $78.14 Range $68.86 - $85.37

Q3 2022

Shares 1,512,227 Value ($000) $105,327 Avg Close $69.42 Range $57.54 - $79.26

Q2 2022

Shares 1,718,051 Value ($000) $103,787 Avg Close $60.57 Range $53.51 - $68.39

Q1 2022

Shares 1,898,569 Value ($000) $126,464 Avg Close $66.39 Range $49.00 - $79.73

Q4 2021

Shares 1,290,189 Value ($000) $101,964 Avg Close $83.91 Range $75.09 - $101.05

Q3 2021

Shares 1,341,053 Value ($000) $115,411 Avg Close $86.44 Range $80.00 - $90.85

Q2 2021

Shares 1,356,430 Value ($000) $112,340 Avg Close $86.45 Range $80.52 - $94.35

Q1 2021

Shares 138,668 Value ($000) $113,970 Avg Close $86.33 Range $74.31 - $95.28

Q4 2020

Shares 123,651 Value ($000) $114,288 Avg Close $87.68 Range $78.10 - $95.12

Q3 2020

Shares 111,041 Value ($000) $94,219 Avg Close $79.70 Range $66.20 - $93.90

Q2 2020

Shares 115,182 Value ($000) $81,856 Avg Close $64.65 Range $52.02 - $74.71

Q1 2020

Shares 114,088 Value ($000) $66,994 Avg Close $65.18 Range $50.02 - $74.67

Q4 2019

Shares 150,895 Value ($000) $90,280 Avg Close $58.38 Range $51.00 - $62.35

Q3 2019

Shares 142,230 Value ($000) $84,371 Avg Close $59.86 Range $55.57 - $63.94

Q2 2019

Shares 171,962 Value ($000) $95,277 Avg Close $51.11 Range $46.90 - $56.27

Q1 2019

Shares 161,005 Value ($000) $75,096 Avg Close $41.31 Range $32.51 - $48.49

Q4 2018

Shares 147,385 Value ($000) $49,719 Avg Close $36.53 Range $31.59 - $42.50

Q3 2018

Shares 135,414 Value ($000) $56,988 Avg Close $42.74 Range $39.71 - $44.84

Q2 2018

Shares 125,743 Value ($000) $51,885 Avg Close $38.48 Range $34.22 - $42.25

Q1 2018

Shares 129,195 Value ($000) $46,856 Avg Close $34.47 Range $29.54 - $37.86

Q4 2017

Shares 127,900 Value ($000) $37,980 Avg Close $29.30 Range $26.56 - $31.47

Q3 2017

Shares 145,691 Value ($000) $39,082 Avg Close $27.75 Range $25.54 - $28.80

Q2 2017

Shares 153,775 Value ($000) $40,535 Avg Close $24.32 Range $20.14 - $26.88

Q1 2017

Shares 128,059 Value ($000) $26,536 Avg Close $20.32 Range $18.49 - $21.24

Q4 2016

Shares 218,643 Value ($000) $41,212 Avg Close $19.64 Range $17.92 - $22.44

Q3 2016

Shares 239,123 Value ($000) $51,777 Avg Close $21.29 Range $20.25 - $22.48

Q2 2016

Shares 258,523 Value ($000) $56,529 Avg Close $19.77 Range $17.45 - $21.88

Q1 2016

Shares 257,973 Value ($000) $48,543 Avg Close $17.71 Range $14.65 - $20.50

Q4 2015

Shares 256,902 Value ($000) $53,099 Avg Close $19.90 Range $16.80 - $21.35

Q3 2015

Shares 290,603 Value ($000) $50,292 Avg Close $19.15 Range $16.35 - $22.35

Q2 2015

Shares 248,166 Value ($000) $49,946 Avg Close $20.39 Range $19.23 - $21.67

Q1 2015

Shares 247,045 Value ($000) $48,873 Avg Close $18.88 Range $16.88 - $20.19

Q4 2014

Shares 235,341 Value ($000) $43,216 Avg Close $16.16 Range $13.44 - $18.96

Q3 2014

Shares 311,566 Value ($000) $48,461 Avg Close $14.90 Range $13.85 - $16.58

Q2 2014

Shares 303,658 Value ($000) $48,030 Avg Close $16.20 Range $14.70 - $19.34

Q1 2014

Shares 239,294 Value ($000) $44,686 Avg Close $18.86 Range $16.38 - $21.82

Q4 2013

Shares 208,470 Value ($000) $38,479 Avg Close $17.69 Range $16.07 - $18.84

Q3 2013

Shares 149,290 Value ($000) $25,068 Avg Close $15.34 Range $12.98 - $17.22

Q2 2013

Shares 148,070 Value ($000) $19,111 Avg Close $11.32 Range $10.46 - $13.07

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	91,929	$6,181	$70.84	$62.00 - $85.24
Q3 2025	270,166	$22,794	$88.37	$79.94 - $97.43
Q2 2025	300,932	$24,195	$77.90	$71.21 - $83.68
Q1 2025	347,693	$27,548	$76.08	$68.41 - $83.03
Q4 2024	358,206	$25,644	$75.52	$68.26 - $82.49
Q3 2024	363,332	$27,410	$75.84	$70.86 - $81.63
Q2 2024	423,426	$31,393	$84.75	$71.90 - $96.98
Q1 2024	610,998	$59,022	$86.08	$79.82 - $100.38
Q4 2023	712,084	$62,229	$80.94	$67.35 - $89.11
Q3 2023	765,134	$58,831	$82.85	$75.78 - $92.30
Q2 2023	791,468	$70,441	$77.21	$67.22 - $92.36
Q1 2023	794,943	$54,732	$73.79	$65.12 - $81.15
Q4 2022	1,366,862	$105,631	$78.14	$68.86 - $85.37
Q3 2022	1,512,227	$105,327	$69.42	$57.54 - $79.26
Q2 2022	1,718,051	$103,787	$60.57	$53.51 - $68.39
Q1 2022	1,898,569	$126,464	$66.39	$49.00 - $79.73
Q4 2021	1,290,189	$101,964	$83.91	$75.09 - $101.05
Q3 2021	1,341,053	$115,411	$86.44	$80.00 - $90.85
Q2 2021	1,356,430	$112,340	$86.45	$80.52 - $94.35
Q1 2021	138,668	$113,970	$86.33	$74.31 - $95.28
Q4 2020	123,651	$114,288	$87.68	$78.10 - $95.12
Q3 2020	111,041	$94,219	$79.70	$66.20 - $93.90
Q2 2020	115,182	$81,856	$64.65	$52.02 - $74.71
Q1 2020	114,088	$66,994	$65.18	$50.02 - $74.67
Q4 2019	150,895	$90,280	$58.38	$51.00 - $62.35
Q3 2019	142,230	$84,371	$59.86	$55.57 - $63.94
Q2 2019	171,962	$95,277	$51.11	$46.90 - $56.27
Q1 2019	161,005	$75,096	$41.31	$32.51 - $48.49
Q4 2018	147,385	$49,719	$36.53	$31.59 - $42.50
Q3 2018	135,414	$56,988	$42.74	$39.71 - $44.84
Q2 2018	125,743	$51,885	$38.48	$34.22 - $42.25
Q1 2018	129,195	$46,856	$34.47	$29.54 - $37.86
Q4 2017	127,900	$37,980	$29.30	$26.56 - $31.47
Q3 2017	145,691	$39,082	$27.75	$25.54 - $28.80
Q2 2017	153,775	$40,535	$24.32	$20.14 - $26.88
Q1 2017	128,059	$26,536	$20.32	$18.49 - $21.24
Q4 2016	218,643	$41,212	$19.64	$17.92 - $22.44
Q3 2016	239,123	$51,777	$21.29	$20.25 - $22.48
Q2 2016	258,523	$56,529	$19.77	$17.45 - $21.88
Q1 2016	257,973	$48,543	$17.71	$14.65 - $20.50
Q4 2015	256,902	$53,099	$19.90	$16.80 - $21.35
Q3 2015	290,603	$50,292	$19.15	$16.35 - $22.35
Q2 2015	248,166	$49,946	$20.39	$19.23 - $21.67
Q1 2015	247,045	$48,873	$18.88	$16.88 - $20.19
Q4 2014	235,341	$43,216	$16.16	$13.44 - $18.96
Q3 2014	311,566	$48,461	$14.90	$13.85 - $16.58
Q2 2014	303,658	$48,030	$16.20	$14.70 - $19.34
Q1 2014	239,294	$44,686	$18.86	$16.38 - $21.82
Q4 2013	208,470	$38,479	$17.69	$16.07 - $18.84
Q3 2013	149,290	$25,068	$15.34	$12.98 - $17.22
Q2 2013	148,070	$19,111	$11.32	$10.46 - $13.07