Amkor Technology, Inc.
MX ˙ BMV ˙ US0316521006
SecurityMX:AMKR / Amkor Technology, Inc.
InstitutionStrs Ohio
Latest Disclosed Ownership2,971 shares
Latest Disclosed Value $ 133,784
Strs Ohio reports 8.59% increase in ownership of AMKR / Amkor Technology, Inc.

On April 24, 2026 - Strs Ohio filed a 13F-HR form disclosing ownership of 2,971 shares of Amkor Technology, Inc. (MX:AMKR) valued at $133,784 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 2, 2026 disclosing 2,736 shares of Amkor Technology, Inc.. This represents a change in shares of 8.59% 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)
2026-04-24 2026-03-31 13F AMKOR TECHNOLOGY COM_STK 031652100 2,971 235 8.59 134 23.15 0.0005
2026-02-02 2025-12-31 13F AMKOR TECHNOLOGY COM_STK 031652100 2,736 5 0.18 108 40.26 0.0004
2025-10-30 2025-09-30 13F AMKOR TECHNOLOGY COM_STK 031652100 2,731 1 0.04 78 35.09 0.0003
2025-08-04 2025-06-30 13F AMKOR TECHNOLOGY COM_STK 031652100 2,730 2,730 57 0.0002
2025-05-28 2024-12-31 13F AMKOR TECHNOLOGY COM_STK 031652100 0 -44,006 -100.00 0 -100.00
2024-11-01 2024-09-30 13F AMKOR TECHNOLOGY COM_STK 031652100 44,006 14,504 49.16 1,347 14.07 0.0052
2024-08-05 2024-06-30 13F AMKOR TECHNOLOGY COM_STK 031652100 29,502 -4,098 -12.20 1,181 117,900.00 0.0047
2024-05-13 2024-03-31 13F AMKOR TECHNOLOGY COM_STK 031652100 33,600 -4,700 -12.27 1 0.00 0.0043
2024-01-30 2023-12-31 13F AMKOR TECHNOLOGY COM 031652100 38,300 -5,400 -12.36 1 0.0053
2023-10-26 2023-09-30 13F/A-1 AMKOR TECHNOLOGY COM 031652100 43,700 3,600 8.98 1 -100.00 0.0044
2023-10-26 2023-09-30 13F AMKOR TECHNOLOGY COM 031652100 43,700 3,600 1 0.0044
2023-07-31 2023-06-30 13F AMKOR TECHNOLOGY COM 031652100 40,100 0 0.00 1 0.00 0.0050
2023-08-02 2023-03-31 13F/A-2 AMKOR TECHNOLOGY COM 031652100 40,100 0 0.00 1 0.0045
2023-08-02 2023-03-31 13F/A-1 AMKOR TECHNOLOGY COM 031652100 40,100 0 1 0.0045
2023-01-26 2022-12-31 13F AMKOR TECHNOLOGY COM 031652100 40,100 -13,100 -24.62 1 -100.00 0.0043
2022-10-27 2022-09-30 13F AMKOR TECHNOLOGY COM 031652100 53,200 -2,100 -3.80 907 -3.20 0.0043
2022-07-25 2022-06-30 13F AMKOR TECHNOLOGY COM 031652100 55,300 2,400 4.54 937 -18.38 0.0042
2022-04-21 2022-03-31 13F AMKOR TECHNOLOGY COM 031652100 52,900 -800 -1.49 1,148 -13.75 0.0042
2022-01-24 2021-12-31 13F AMKOR TECHNOLOGY COM 031652100 53,700 6,800 14.50 1,331 13.76 0.0046
2021-10-22 2021-09-30 13F AMKOR TECHNOLOGY COM 031652100 46,900 -6,900 -12.83 1,170 -8.09 0.0044
2021-07-26 2021-06-30 13F AMKOR TECHNOLOGY COM 031652100 53,800 -1,000 -1.82 1,273 -2.00 0.0046
2021-04-23 2021-03-31 13F AMKOR TECHNOLOGY COM 031652100 54,800 -7,900 -12.60 1,299 37.46 0.0049
2021-01-25 2020-12-31 13F AMKOR TECHNOLOGY COM 031652100 62,700 -4,500 -6.70 945 25.66 0.0036
2020-12-14 2020-09-30 13F AMKOR TECHNOLOGY COM 031652100 67,200 4,600 7.35 752 -2.34 0.0031
2020-07-23 2020-06-30 13F AMKOR TECHNOLOGY COM 031652100 62,600 -7,400 -10.57 770 41.28 0.0034
2020-04-23 2020-03-31 13F AMKOR TECHNOLOGY COM 031652100 70,000 2,500 3.70 545 -37.86 0.0029
2020-01-24 2019-12-31 13F AMKOR TECHNOLOGY COM 031652100 67,500 -15,100 -18.28 877 16.78 0.0037
2019-10-21 2019-09-30 13F/A-1 AMKOR TECHNOLOGY COM 031652100 82,600 -18,700 -18.46 751 -0.53 0.0033
2019-10-21 2019-09-30 13F AMKOR TECHNOLOGY COM 031652100 82,600 15,100 751 3,323.9677
2019-07-25 2019-06-30 13F AMKOR TECHNOLOGY COM 031652100 101,300 73,000 257.95 755 213.28 0.0034
2019-04-19 2019-03-31 13F AMKOR TECHNOLOGY COM 031652100 28,300 -78,100 -73.40 241 -65.42 0.0011
2019-01-23 2018-12-31 13F AMKOR TECHNOLOGY COM 031652100 106,400 -2,400 -2.21 697 -13.31 0.0035
2018-10-19 2018-09-30 13F AMKOR TECHNOLOGY COM 031652100 108,800 5,600 5.43 804 -9.26 0.0035
2018-08-06 2018-06-30 13F AMKOR TECHNOLOGY COM 031652100 103,200 18,500 21.84 886 3.26 0.0038
2018-04-20 2018-03-31 13F AMKOR TECHNOLOGY COM 031652100 84,700 -3,000 -3.42 858 -2.61 0.0038
2018-01-23 2017-12-31 13F AMKOR TECHNOLOGY COM 031652100 87,700 0 0.00 881 -4.76 0.0038
2017-10-23 2017-09-30 13F AMKOR TECHNOLOGY COM 031652100 87,700 5,700 6.95 925 15.48 0.0040
2017-07-26 2017-06-30 13F AMKOR TECHNOLOGY COM 031652100 82,000 2,900 3.67 801 -12.55 0.0036
2017-04-26 2017-03-31 13F AMKOR TECHNOLOGY COM 031652100 79,100 -5,000 -5.95 916 3.27 0.0040
2017-01-24 2016-12-31 13F AMKOR TECHNOLOGY COM 031652100 84,100 -6,100 -6.76 887 1.26 0.0039
2016-10-27 2016-09-30 13F AMKOR TECHNOLOGY COM 031652100 90,200 -33,400 -27.02 876 23.38 0.0039
2016-07-26 2016-06-30 13F AMKOR TECHNOLOGY COM 031652100 123,600 -2,900 -2.29 710 -4.70 0.0032
2016-04-25 2016-03-31 13F/A-1 AMKOR TECHNOLOGY COM 031652100 126,500 5,800 4.81 745 1.64 0.0033
2016-01-28 2015-12-31 13F AMKOR TECHNOLOGY COM 031652100 120,700 8,300 7.38 733 45.44 0.0033
2015-10-21 2015-09-30 13F AMKOR TECHNOLOGY COM 031652100 112,400 0 0.00 504 -25.00 0.0024
2015-08-04 2015-06-30 13F AMKOR TECHNOLOGY COM 031652100 112,400 13,100 13.19 672 -23.38 0.0030
2015-04-27 2015-03-31 13F/A-1 AMKOR TECHNOLOGY COM 031652100 99,300 -21,600 -17.87 877 2.21 0.0039
2015-04-21 2015-03-31 13F AMKOR TECHNOLOGY COM 031652100 99,300 877
2015-01-23 2014-12-31 13F AMKOR TECHNOLOGY COM 031652100 120,900 29,000 31.56 858 11.00 0.0037
2014-10-29 2014-09-30 13F/A-1 AMKOR TECHNOLOGY COM 031652100 91,900 9,000 10.86 773 -16.61 0.0034
2014-07-24 2014-06-30 13F AMKOR TECHNOLOGY COM 031652100 82,900 82,900 927 0.0041
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.