AMKOR TECHNOLOGY INC

Ticker: AMKR CUSIP: 031652100 Class: Common Stock

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

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

Q4 2025

Shares 117,973 Value ($000) $4,658 Avg Close $35.54 Range $28.11 - $47.28

Q3 2025

Shares 116,323 Value ($000) $3,304 Avg Close $23.96 Range $20.48 - $30.29

Q2 2025

Shares 102,776 Value ($000) $2,157 Avg Close $18.29 Range $13.89 - $21.19

Q1 2025

Shares 101,817 Value ($000) $1,839 Avg Close $22.28 Range $17.44 - $27.31

Q4 2024

Shares 103,893 Value ($000) $2,669 Avg Close $26.77 Range $23.33 - $30.71

Q3 2024

Shares 104,992 Value ($000) $3,213 Avg Close $32.91 Range $25.69 - $43.32

Q2 2024

Shares 108,289 Value ($000) $4,334 Avg Close $31.93 Range $27.12 - $39.53

Q1 2024

Shares 111,435 Value ($000) $3,593 Avg Close $30.50 Range $27.72 - $35.56

Q4 2023

Shares 117,468 Value ($000) $3,908 Avg Close $25.22 Range $16.85 - $33.10

Q3 2023

Shares 120,367 Value ($000) $2,720 Avg Close $25.22 Range $20.83 - $28.77

Q2 2023

Shares 131,365 Value ($000) $3,908 Avg Close $23.21 Range $19.46 - $28.92

Q1 2023

Shares 134,607 Value ($000) $3,502 Avg Close $26.02 Range $22.73 - $29.82

Q4 2022

Shares 136,386 Value ($000) $3,271 Avg Close $21.98 Range $15.71 - $27.58

Q3 2022

Shares 134,865 Value ($000) $2,299 Avg Close $18.20 Range $14.08 - $21.90

Q2 2022

Shares 137,669 Value ($000) $2,333 Avg Close $17.93 Range $15.37 - $20.90

Q1 2022

Shares 137,495 Value ($000) $2,986 Avg Close $21.32 Range $18.61 - $25.07

Q4 2021

Shares 148,227 Value ($000) $3,675 Avg Close $21.87 Range $19.83 - $24.52

Q3 2021

Shares 145,077 Value ($000) $3,620 Avg Close $23.93 Range $19.34 - $27.70

Q2 2021

Shares 140,645 Value ($000) $3,329 Avg Close $20.84 Range $16.88 - $25.74

Q1 2021

Shares 150,572 Value ($000) $3,570 Avg Close $19.14 Range $13.85 - $24.36

Q4 2020

Shares 150,981 Value ($000) $2,277 Avg Close $12.70 Range $10.09 - $14.70

Q3 2020

Shares 150,855 Value ($000) $1,690 Avg Close $11.54 Range $9.98 - $14.72

Q2 2020

Shares 150,411 Value ($000) $1,852 Avg Close $9.62 Range $6.65 - $12.20

Q1 2020

Shares 148,360 Value ($000) $1,156 Avg Close $10.13 Range $5.03 - $13.81

Q4 2019

Shares 149,956 Value ($000) $1,949 Avg Close $11.12 Range $8.40 - $14.21

Q3 2019

Shares 153,065 Value ($000) $1,393 Avg Close $7.99 Range $6.78 - $9.12

Q2 2019

Shares 151,237 Value ($000) $1,128 Avg Close $7.29 Range $5.97 - $9.08

Q1 2019

Shares 157,868 Value ($000) $1,348 Avg Close $7.71 Range $5.86 - $8.92

Q4 2018

Shares 160,208 Value ($000) $1,051 Avg Close $6.15 Range $5.33 - $7.05

Q3 2018

Shares 155,141 Value ($000) $1,146 Avg Close $7.92 Range $6.80 - $8.76

Q2 2018

Shares 156,651 Value ($000) $1,346 Avg Close $8.50 Range $7.63 - $9.77

Q1 2018

Shares 155,214 Value ($000) $1,572 Avg Close $9.70 Range $8.20 - $10.88

Q4 2017

Shares 160,655 Value ($000) $1,615 Avg Close $9.97 Range $9.24 - $11.07

Q3 2017

Shares 162,887 Value ($000) $1,718 Avg Close $8.92 Range $7.75 - $10.48

Q2 2017

Shares 180,583 Value ($000) $1,764 Avg Close $10.55 Range $8.97 - $11.63

Q1 2017

Shares 197,177 Value ($000) $2,285 Avg Close $9.61 Range $8.43 - $10.85

Q4 2016

Shares 206,477 Value ($000) $2,178 Avg Close $9.93 Range $8.41 - $11.63

Q3 2016

Shares 211,977 Value ($000) $2,060 Avg Close $7.46 Range $5.13 - $9.17

Q2 2016

Shares 209,977 Value ($000) $1,207 Avg Close $5.44 Range $4.91 - $6.06

Q1 2016

Shares 209,556 Value ($000) $1,234 Avg Close $5.06 Range $3.81 - $5.78

Q4 2015

Shares 183,305 Value ($000) $1,114 Avg Close $5.64 Range $4.05 - $6.57

Q3 2015

Shares 180,054 Value ($000) $808 Avg Close $4.58 Range $3.74 - $5.73

Q2 2015

Shares 180,654 Value ($000) $1,080 Avg Close $6.72 Range $5.49 - $8.46

Q1 2015

Shares 156,275 Value ($000) $1,381 Avg Close $7.58 Range $5.83 - $9.44

Q4 2014

Shares 158,175 Value ($000) $1,123 Avg Close $6.46 Range $5.38 - $8.10

Q3 2014

Shares 157,502 Value ($000) $1,325 Avg Close $9.21 Range $7.83 - $10.86

Q2 2014

Shares 155,808 Value ($000) $1,742 Avg Close $8.60 Range $6.24 - $11.43

Q1 2014

Shares 126,908 Value ($000) $871 Avg Close $5.44 Range $4.68 - $6.41

Q4 2013

Shares 126,908 Value ($000) $778 Avg Close $4.97 Range $3.99 - $5.77

Q3 2013

Shares 126,108 Value ($000) $541 Avg Close $4.00 Range $3.73 - $4.42

Q2 2013

Shares 111,767 Value ($000) $471 Avg Close $3.93 Range $3.31 - $4.40

Q1 2013

Shares 128,059 Value ($000) $512 Avg Close $4.15 Range $3.64 - $4.70

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	117,973	$4,658	$35.54	$28.11 - $47.28
Q3 2025	116,323	$3,304	$23.96	$20.48 - $30.29
Q2 2025	102,776	$2,157	$18.29	$13.89 - $21.19
Q1 2025	101,817	$1,839	$22.28	$17.44 - $27.31
Q4 2024	103,893	$2,669	$26.77	$23.33 - $30.71
Q3 2024	104,992	$3,213	$32.91	$25.69 - $43.32
Q2 2024	108,289	$4,334	$31.93	$27.12 - $39.53
Q1 2024	111,435	$3,593	$30.50	$27.72 - $35.56
Q4 2023	117,468	$3,908	$25.22	$16.85 - $33.10
Q3 2023	120,367	$2,720	$25.22	$20.83 - $28.77
Q2 2023	131,365	$3,908	$23.21	$19.46 - $28.92
Q1 2023	134,607	$3,502	$26.02	$22.73 - $29.82
Q4 2022	136,386	$3,271	$21.98	$15.71 - $27.58
Q3 2022	134,865	$2,299	$18.20	$14.08 - $21.90
Q2 2022	137,669	$2,333	$17.93	$15.37 - $20.90
Q1 2022	137,495	$2,986	$21.32	$18.61 - $25.07
Q4 2021	148,227	$3,675	$21.87	$19.83 - $24.52
Q3 2021	145,077	$3,620	$23.93	$19.34 - $27.70
Q2 2021	140,645	$3,329	$20.84	$16.88 - $25.74
Q1 2021	150,572	$3,570	$19.14	$13.85 - $24.36
Q4 2020	150,981	$2,277	$12.70	$10.09 - $14.70
Q3 2020	150,855	$1,690	$11.54	$9.98 - $14.72
Q2 2020	150,411	$1,852	$9.62	$6.65 - $12.20
Q1 2020	148,360	$1,156	$10.13	$5.03 - $13.81
Q4 2019	149,956	$1,949	$11.12	$8.40 - $14.21
Q3 2019	153,065	$1,393	$7.99	$6.78 - $9.12
Q2 2019	151,237	$1,128	$7.29	$5.97 - $9.08
Q1 2019	157,868	$1,348	$7.71	$5.86 - $8.92
Q4 2018	160,208	$1,051	$6.15	$5.33 - $7.05
Q3 2018	155,141	$1,146	$7.92	$6.80 - $8.76
Q2 2018	156,651	$1,346	$8.50	$7.63 - $9.77
Q1 2018	155,214	$1,572	$9.70	$8.20 - $10.88
Q4 2017	160,655	$1,615	$9.97	$9.24 - $11.07
Q3 2017	162,887	$1,718	$8.92	$7.75 - $10.48
Q2 2017	180,583	$1,764	$10.55	$8.97 - $11.63
Q1 2017	197,177	$2,285	$9.61	$8.43 - $10.85
Q4 2016	206,477	$2,178	$9.93	$8.41 - $11.63
Q3 2016	211,977	$2,060	$7.46	$5.13 - $9.17
Q2 2016	209,977	$1,207	$5.44	$4.91 - $6.06
Q1 2016	209,556	$1,234	$5.06	$3.81 - $5.78
Q4 2015	183,305	$1,114	$5.64	$4.05 - $6.57
Q3 2015	180,054	$808	$4.58	$3.74 - $5.73
Q2 2015	180,654	$1,080	$6.72	$5.49 - $8.46
Q1 2015	156,275	$1,381	$7.58	$5.83 - $9.44
Q4 2014	158,175	$1,123	$6.46	$5.38 - $8.10
Q3 2014	157,502	$1,325	$9.21	$7.83 - $10.86
Q2 2014	155,808	$1,742	$8.60	$6.24 - $11.43
Q1 2014	126,908	$871	$5.44	$4.68 - $6.41
Q4 2013	126,908	$778	$4.97	$3.99 - $5.77
Q3 2013	126,108	$541	$4.00	$3.73 - $4.42
Q2 2013	111,767	$471	$3.93	$3.31 - $4.40
Q1 2013	128,059	$512	$4.15	$3.64 - $4.70