Amkor Technology, Inc.
MX ˙ BMV ˙ US0316521006
SecurityMX:AMKR / Amkor Technology, Inc.
InstitutionArizona State Retirement System
Latest Disclosed Ownership33,949 shares
Latest Disclosed Value $ 1,528,723
Arizona State Retirement System reports 1.33% decrease in ownership of AMKR / Amkor Technology, Inc.

On May 1, 2026 - Arizona State Retirement System filed a 13F-HR form disclosing ownership of 33,949 shares of Amkor Technology, Inc. (MX:AMKR) valued at $1,528,723 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 28, 2026 disclosing 34,405 shares of Amkor Technology, Inc.. This represents a change in shares of -1.33% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-01 2026-03-31 13F AMKOR TECHNOLOGY COM 031652100 33,949 -456 -1.33 1,529 12.52 0.0089
2026-01-28 2025-12-31 13F AMKOR TECHNOLOGY COM 031652100 34,405 -2,148 -5.88 1,358 30.83 0.0074
2025-11-03 2025-09-30 13F AMKOR TECHNOLOGY COM 031652100 36,553 503 1.40 1,038 37.30 0.0055
2025-08-13 2025-06-30 13F AMKOR TECHNOLOGY COM 031652100 36,050 4,230 13.29 757 31.71 0.0044
2025-05-01 2025-03-31 13F AMKOR TECHNOLOGY COM 031652100 31,820 -340 -1.06 575 -30.51 0.0037
2025-02-06 2024-12-31 13F AMKOR TECHNOLOGY COM 031652100 32,160 262 0.82 826 -15.37 0.0050
2024-11-12 2024-09-30 13F AMKOR TECHNOLOGY COM 031652100 31,898 888 2.86 976 -21.35 0.0062
2024-08-05 2024-06-30 13F AMKOR TECHNOLOGY COM 031652100 31,010 616 2.03 1,241 26.76 0.0083
2024-05-07 2024-03-31 13F AMKOR TECHNOLOGY COM 031652100 30,394 -522 -1.69 980 -4.77 0.0068
2024-01-24 2023-12-31 13F AMKOR TECHNOLOGY COM 031652100 30,916 -557 -1.77 1,029 44.59 0.0078
2023-11-07 2023-09-30 13F AMKOR TECHNOLOGY COM 031652100 31,473 428 1.38 711 -22.97 0.0060
2023-08-01 2023-06-30 13F AMKOR TECHNOLOGY COM 031652100 31,045 -897 -2.81 924 11.07 0.0075
2023-04-27 2023-03-31 13F AMKOR TECHNOLOGY COM 031652100 31,942 853 2.74 831 11.54 0.0075
2023-02-08 2022-12-31 13F AMKOR TECHNOLOGY COM 031652100 31,089 1,156 3.86 746 46.08 0.0072
2022-11-07 2022-09-30 13F AMKOR TECHNOLOGY COM 031652100 29,933 102 0.34 510 0.79 0.0053
2022-07-28 2022-06-30 13F AMKOR TECHNOLOGY COM 031652100 29,831 86 0.29 506 -21.67 0.0049
2022-05-04 2022-03-31 13F AMKOR TECHNOLOGY COM 031652100 29,745 151 0.51 646 -11.99 0.0052
2022-02-04 2021-12-31 13F AMKOR TECHNOLOGY COM 031652100 29,594 -337 -1.13 734 -1.74 0.0056
2021-11-12 2021-09-30 13F AMKOR TECHNOLOGY COM 031652100 29,931 165 0.55 747 5.96 0.0061
2021-08-02 2021-06-30 13F AMKOR TECHNOLOGY COM 031652100 29,766 -1,993 -6.28 705 -6.37 0.0057
2021-05-06 2021-03-31 13F AMKOR TECHNOLOGY COM 031652100 31,759 250 0.79 753 58.53 0.0066
2021-01-28 2020-12-31 13F AMKOR TECHNOLOGY COM 031652100 31,509 -1,233 -3.77 475 29.43 0.0043
2020-11-05 2020-09-30 13F AMKOR TECHNOLOGY COM 031652100 32,742 8,258 33.73 367 21.93 0.0036
2020-08-04 2020-06-30 13F AMKOR TECHNOLOGY COM 031652100 24,484 -848 -3.35 301 52.79 0.0042
2020-05-05 2020-03-31 13F AMKOR TECHNOLOGY COM 031652100 25,332 25,332 197 0.0034
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.