KOPPERS HOLDINGS INC

Ticker: KOP CUSIP: 50060P106 Class: Common Stock

CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM's Holding History (CIK: 0001081019)

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

Q4 2025

Shares 18,848 Value ($000) $510 Avg Close $27.92 Range $24.93 - $30.27

Q3 2025

Shares 18,888 Value ($000) $529 Avg Close $30.64 Range $26.64 - $35.42

Q2 2025

Shares 19,135 Value ($000) $615 Avg Close $28.51 Range $22.81 - $33.40

Q1 2025

Shares 19,135 Value ($000) $536 Avg Close $29.79 Range $26.71 - $32.62

Q4 2024

Shares 19,135 Value ($000) $620 Avg Close $35.29 Range $30.31 - $39.33

Q3 2024

Shares 19,990 Value ($000) $730 Avg Close $36.81 Range $33.32 - $41.05

Q2 2024

Shares 20,601 Value ($000) $762 Avg Close $45.92 Range $36.33 - $56.06

Q1 2024

Shares 20,760 Value ($000) $1,145 Avg Close $50.84 Range $45.30 - $57.24

Q4 2023

Shares 21,949 Value ($000) $1,124 Avg Close $41.07 Range $34.25 - $51.33

Q3 2023

Shares 22,864 Value ($000) $904 Avg Close $37.10 Range $32.03 - $41.14

Q2 2023

Shares 25,025 Value ($000) $853 Avg Close $31.88 Range $27.88 - $34.73

Q1 2023

Shares 25,910 Value ($000) $906 Avg Close $32.48 Range $27.62 - $37.52

Q4 2022

Shares 26,296 Value ($000) $742 Avg Close $26.33 Range $20.34 - $31.62

Q3 2022

Shares 26,210 Value ($000) $545 Avg Close $22.41 Range $19.60 - $25.85

Q2 2022

Shares 26,782 Value ($000) $606 Avg Close $24.62 Range $21.17 - $27.82

Q1 2022

Shares 27,014 Value ($000) $743 Avg Close $28.63 Range $26.03 - $32.64

Q4 2021

Shares 29,658 Value ($000) $928 Avg Close $31.64 Range $27.29 - $36.29

Q3 2021

Shares 28,448 Value ($000) $889 Avg Close $30.18 Range $27.05 - $33.29

Q2 2021

Shares 28,554 Value ($000) $924 Avg Close $32.69 Range $29.53 - $38.23

Q1 2021

Shares 31,035 Value ($000) $1,079 Avg Close $33.96 Range $28.60 - $37.95

Q4 2020

Shares 31,035 Value ($000) $967 Avg Close $25.23 Range $19.75 - $30.43

Q3 2020

Shares 31,035 Value ($000) $649 Avg Close $22.04 Range $16.86 - $26.37

Q2 2020

Shares 31,035 Value ($000) $585 Avg Close $14.72 Range $8.00 - $22.09

Q1 2020

Shares 27,836 Value ($000) $344 Avg Close $24.89 Range $8.37 - $37.67

Q4 2019

Shares 28,745 Value ($000) $1,099 Avg Close $34.04 Range $25.45 - $43.37

Q3 2019

Shares 29,326 Value ($000) $857 Avg Close $26.87 Range $22.89 - $29.57

Q2 2019

Shares 28,976 Value ($000) $851 Avg Close $27.00 Range $25.07 - $29.17

Q1 2019

Shares 30,633 Value ($000) $796 Avg Close $22.79 Range $16.00 - $26.87

Q4 2018

Shares 34,889 Value ($000) $595 Avg Close $22.79 Range $14.54 - $31.53

Q3 2018

Shares 31,525 Value ($000) $982 Avg Close $34.72 Range $29.56 - $38.82

Q2 2018

Shares 31,527 Value ($000) $1,209 Avg Close $40.28 Range $36.59 - $44.88

Q1 2018

Shares 31,363 Value ($000) $1,289 Avg Close $42.63 Range $37.56 - $49.72

Q4 2017

Shares 32,532 Value ($000) $1,656 Avg Close $47.24 Range $44.34 - $50.21

Q3 2017

Shares 33,051 Value ($000) $1,525 Avg Close $37.68 Range $34.09 - $45.12

Q2 2017

Shares 36,578 Value ($000) $1,322 Avg Close $37.33 Range $32.86 - $43.42

Q1 2017

Shares 40,059 Value ($000) $1,696 Avg Close $40.70 Range $37.90 - $44.44

Q4 2016

Shares 41,959 Value ($000) $1,691 Avg Close $35.58 Range $30.32 - $41.39

Q3 2016

Shares 43,059 Value ($000) $1,386 Avg Close $30.57 Range $27.66 - $32.67

Q2 2016

Shares 42,759 Value ($000) $1,314 Avg Close $25.09 Range $20.72 - $30.39

Q1 2016

Shares 43,459 Value ($000) $977 Avg Close $17.27 Range $13.16 - $22.71

Q4 2015

Shares 38,003 Value ($000) $694 Avg Close $19.67 Range $16.81 - $22.90

Q3 2015

Shares 37,403 Value ($000) $754 Avg Close $20.57 Range $17.33 - $24.10

Q2 2015

Shares 37,503 Value ($000) $927 Avg Close $23.45 Range $18.67 - $26.56

Q1 2015

Shares 37,348 Value ($000) $735 Avg Close $19.47 Range $15.29 - $25.63

Q4 2014

Shares 37,948 Value ($000) $986 Avg Close $29.74 Range $21.83 - $38.35

Q3 2014

Shares 37,787 Value ($000) $1,253 Avg Close $34.78 Range $31.75 - $37.67

Q2 2014

Shares 37,373 Value ($000) $1,430 Avg Close $37.27 Range $33.70 - $43.17

Q1 2014

Shares 37,673 Value ($000) $1,553 Avg Close $38.65 Range $33.68 - $43.26

Q4 2013

Shares 37,473 Value ($000) $1,714 Avg Close $42.61 Range $39.00 - $46.85

Q3 2013

Shares 37,273 Value ($000) $1,590 Avg Close $36.85 Range $32.31 - $40.30

Q2 2013

Shares 36,101 Value ($000) $1,378 Avg Close $38.63 Range $34.88 - $43.02

Q1 2013

Shares 36,069 Value ($000) $1,586 Avg Close $38.36 Range $35.61 - $42.32

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	18,848	$510	$27.92	$24.93 - $30.27
Q3 2025	18,888	$529	$30.64	$26.64 - $35.42
Q2 2025	19,135	$615	$28.51	$22.81 - $33.40
Q1 2025	19,135	$536	$29.79	$26.71 - $32.62
Q4 2024	19,135	$620	$35.29	$30.31 - $39.33
Q3 2024	19,990	$730	$36.81	$33.32 - $41.05
Q2 2024	20,601	$762	$45.92	$36.33 - $56.06
Q1 2024	20,760	$1,145	$50.84	$45.30 - $57.24
Q4 2023	21,949	$1,124	$41.07	$34.25 - $51.33
Q3 2023	22,864	$904	$37.10	$32.03 - $41.14
Q2 2023	25,025	$853	$31.88	$27.88 - $34.73
Q1 2023	25,910	$906	$32.48	$27.62 - $37.52
Q4 2022	26,296	$742	$26.33	$20.34 - $31.62
Q3 2022	26,210	$545	$22.41	$19.60 - $25.85
Q2 2022	26,782	$606	$24.62	$21.17 - $27.82
Q1 2022	27,014	$743	$28.63	$26.03 - $32.64
Q4 2021	29,658	$928	$31.64	$27.29 - $36.29
Q3 2021	28,448	$889	$30.18	$27.05 - $33.29
Q2 2021	28,554	$924	$32.69	$29.53 - $38.23
Q1 2021	31,035	$1,079	$33.96	$28.60 - $37.95
Q4 2020	31,035	$967	$25.23	$19.75 - $30.43
Q3 2020	31,035	$649	$22.04	$16.86 - $26.37
Q2 2020	31,035	$585	$14.72	$8.00 - $22.09
Q1 2020	27,836	$344	$24.89	$8.37 - $37.67
Q4 2019	28,745	$1,099	$34.04	$25.45 - $43.37
Q3 2019	29,326	$857	$26.87	$22.89 - $29.57
Q2 2019	28,976	$851	$27.00	$25.07 - $29.17
Q1 2019	30,633	$796	$22.79	$16.00 - $26.87
Q4 2018	34,889	$595	$22.79	$14.54 - $31.53
Q3 2018	31,525	$982	$34.72	$29.56 - $38.82
Q2 2018	31,527	$1,209	$40.28	$36.59 - $44.88
Q1 2018	31,363	$1,289	$42.63	$37.56 - $49.72
Q4 2017	32,532	$1,656	$47.24	$44.34 - $50.21
Q3 2017	33,051	$1,525	$37.68	$34.09 - $45.12
Q2 2017	36,578	$1,322	$37.33	$32.86 - $43.42
Q1 2017	40,059	$1,696	$40.70	$37.90 - $44.44
Q4 2016	41,959	$1,691	$35.58	$30.32 - $41.39
Q3 2016	43,059	$1,386	$30.57	$27.66 - $32.67
Q2 2016	42,759	$1,314	$25.09	$20.72 - $30.39
Q1 2016	43,459	$977	$17.27	$13.16 - $22.71
Q4 2015	38,003	$694	$19.67	$16.81 - $22.90
Q3 2015	37,403	$754	$20.57	$17.33 - $24.10
Q2 2015	37,503	$927	$23.45	$18.67 - $26.56
Q1 2015	37,348	$735	$19.47	$15.29 - $25.63
Q4 2014	37,948	$986	$29.74	$21.83 - $38.35
Q3 2014	37,787	$1,253	$34.78	$31.75 - $37.67
Q2 2014	37,373	$1,430	$37.27	$33.70 - $43.17
Q1 2014	37,673	$1,553	$38.65	$33.68 - $43.26
Q4 2013	37,473	$1,714	$42.61	$39.00 - $46.85
Q3 2013	37,273	$1,590	$36.85	$32.31 - $40.30
Q2 2013	36,101	$1,378	$38.63	$34.88 - $43.02
Q1 2013	36,069	$1,586	$38.36	$35.61 - $42.32