Amkor Technology, Inc.
MX ˙ BMV ˙ US0316521006
SecurityMX:AMKR / Amkor Technology, Inc.
InstitutionLeuthold Group, Llc
Latest Disclosed Ownership10,782 shares
Latest Disclosed Value $ 485,513
Leuthold Group, Llc reports 2.90% decrease in ownership of AMKR / Amkor Technology, Inc.

On May 6, 2026 - Leuthold Group, Llc filed a 13F-HR form disclosing ownership of 10,782 shares of Amkor Technology, Inc. (MX:AMKR) valued at $485,513 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 11,104 shares of Amkor Technology, Inc.. This represents a change in shares of -2.90% 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)
2026-05-06 2026-03-31 13F Amkor Technology COM 031652100 10,782 -322 -2.90 486 10.73 0.0517
2026-02-05 2025-12-31 13F Amkor Technology COM 031652100 11,104 123 1.12 438 40.84 0.0473
2025-11-06 2025-09-30 13F Amkor Technology COM 031652100 10,981 10,981 312 0.0341
2025-02-03 2024-12-31 13F Amkor Technology COM 031652100 0 -8,662 -100.00 0 -100.00
2024-10-24 2024-09-30 13F Amkor Technology COM 031652100 8,662 -3,172 -26.80 265 -43.97 0.0295
2024-08-12 2024-06-30 13F Amkor Technology COM 031652100 11,834 -171 -1.42 474 22.22 0.0547
2024-05-06 2024-03-31 13F Amkor Technology COM 031652100 12,005 -513 -4.10 387 -6.97 0.0436
2024-02-06 2023-12-31 13F Amkor Technology COM 031652100 12,518 -96 -0.76 416 45.96 0.0521
2023-11-07 2023-09-30 13F Amkor Technology COM 031652100 12,614 -195 -1.52 285 -25.20 0.0400
2023-08-08 2023-06-30 13F Amkor Technology COM 031652100 12,809 0 0.00 381 14.41 0.0494
2023-04-18 2023-03-31 13F Amkor Technology COM 031652100 12,809 -786 -5.78 333 2.15 0.0440
2023-02-07 2022-12-31 13F/A-1 Amkor Technology COM 031652100 13,595 -335 -2.40 326 36.97 0.0439
2023-01-31 2022-12-31 13F Amkor Technology COM 031652100 13,595 -335 0 0.0439
2022-10-31 2022-09-30 13F Amkor Technology COM 031652100 13,930 0 0.00 238 0.85 0.0359
2022-08-01 2022-06-30 13F Amkor Technology COM 031652100 13,930 0 0.00 236 -22.11 0.0335
2022-05-04 2022-03-31 13F Amkor Technology COM 031652100 13,930 0 0.00 303 -12.17 0.0388
2022-02-03 2021-12-31 13F Amkor Technology COM 031652100 13,930 -158 -1.12 345 -1.71 0.0404
2021-11-15 2021-09-30 13F Amkor Technology COM 031652100 14,088 0 0.00 351 5.41 0.0431
2021-08-13 2021-06-30 13F Amkor Technology COM 031652100 14,088 -380 -2.63 333 -2.92 0.0409
2021-05-17 2021-03-31 13F Amkor Technology COM 031652100 14,468 -361 -2.43 343 53.13 0.0433
2021-02-16 2020-12-31 13F Amkor Technology COM 031652100 14,829 14,829 224 0.0295
2018-11-14 2018-09-30 13F Amkor Technology COM 031652100 0 -71,613 -100.00 0 -100.00
2018-08-14 2018-06-30 13F Amkor Technology COM 031652100 71,613 -681 -0.94 615 -15.98 0.0677
2018-05-15 2018-03-31 13F Amkor Technology COM 031652100 72,294 -353 -0.49 732 0.27 0.0833
2018-02-14 2017-12-31 13F Amkor Technology COM 031652100 72,647 -4,996 -6.43 730 -10.87 0.0729
2017-11-14 2017-09-30 13F Amkor Technology COM 031652100 77,643 -3,855 -4.73 819 2.89 0.0827
2017-08-14 2017-06-30 13F Amkor Technology COM 031652100 81,498 81,498 796 0.0853
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.