CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM

Pension

Position in AMKR — Amkor Technology, Inc.

CIK 1081019 WEST SACRAMENTO, CA

Back to AMKR Full portfolio

Position in AMKR

as of Mar 31, 2026 · filed May 18, 2026 Compact

Position Value

$6,447,305

+$1,789,731 QoQ

Shares Held

143,178

+21.4% QoQ

Ownership

0.058%

of shares outstanding

% of Portfolio

0.01%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

25 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Common Shares in AMKR Over Time

Shares Held

Position Value (USD)

Position in Semiconductor Equipment & Materials

Technology · as of Mar 31, 2026

CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM holds $1,316,885,972 across 21 Semiconductor Equipment & Materials names. AMKR ranks #9 (0.5% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	AMAT	Applied Materials Inc /De	1,224,298	$418,452,813
2	LRCX	Lam Research Corp	1,922,942	$410,855,787
3	KLAC	Kla Corp	2,008,580	$295,745,327
4	TER	Teradyne, Inc	248,462	$73,659,044
5	Q	Qnity Electronics, Inc.	264,442	$30,511,317
6	ENTG	Entegris Inc	236,045	$27,673,915
7	ONTO	Onto Innovation Inc.	56,775	$11,642,849
8	FORM	Formfactor Inc	89,629	$8,693,116

All Filings in AMKR

Export CSV

25 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$6,447,305	143,178	+21.4%	Shares	Sole	2026-05-18
2025-12-31	$4,657,574	117,973	+1.4%	Shares	Sole	2026-02-17
2025-09-30	$3,303,573	116,323	+13.2%	Shares	Sole	2025-11-14
2025-06-30	$2,157,268	102,776	+0.9%	Shares	Sole	2025-08-14
2025-03-31	$1,838,815	101,817	-2.0%	Shares	Sole	2025-05-15
2024-12-31	$2,669,011	103,893	-1.0%	Shares	Sole	2025-03-18
2024-09-30	$3,212,755	104,992	-3.0%	Shares	Sole	2025-04-04
2024-06-30	$4,333,725	108,289	-2.8%	Shares	Sole	2025-04-08
2024-03-31	$3,592,664	111,435	-5.1%	Shares	Sole	2024-05-16
2023-12-31	$3,908,160	117,468	-2.4%	Shares	Sole	2024-02-13
2023-09-30	$2,720,294	120,367	-8.4%	Shares	Sole	2023-11-14
2023-06-30	$3,908,108	131,365	-2.4%	Shares	Sole	2023-08-21
2023-03-31	$3,502,474	134,607	-1.3%	Shares	Sole	2023-05-09
2022-12-31	$3,270,536	136,386	+1.1%	Shares	Sole	2023-02-14
2022-09-30	$2,299,448	134,865	-2.0%	Shares	Sole	2022-11-21
2022-06-30	$2,333,489	137,669	+0.1%	Shares	Sole	2022-08-15
2022-03-31	$2,986,391	137,495	-7.2%	Shares	Sole	2022-05-16
2021-12-31	$3,674,547	148,227	+2.2%	Shares	Sole	2022-02-15
2021-09-30	$3,619,671	145,077	+3.2%	Shares	Sole	2021-11-15
2021-06-30	$3,329,067	140,645	-6.6%	Shares	Sole	2021-08-16
2021-03-31	$3,570,062	150,572	-0.3%	Shares	Sole	2021-05-18
2020-12-31	$2,276,793	150,981	+0.1%	Shares	Sole	2021-02-16
2020-09-30	$1,689,576	150,855	+0.3%	Shares	Sole	2020-11-17
2020-06-30	$1,851,559	150,411	+1.4%	Shares	Sole	2020-08-17
2020-03-31	$1,155,724	148,360	—	Shares	Sole	2020-05-13
No filing history on record for this holder in this stock.