Amkor Technology, Inc.
MX ˙ BMV ˙ US0316521006
SecurityMX:AMKR / Amkor Technology, Inc.
InstitutionProShare Advisors LLC
Latest Disclosed Ownership16,121 shares
Latest Disclosed Value $ 725,929
ProShare Advisors LLC reports 21.53% decrease in ownership of AMKR / Amkor Technology, Inc.

On April 24, 2026 - ProShare Advisors LLC filed a 13F-HR form disclosing ownership of 16,121 shares of Amkor Technology, Inc. (MX:AMKR) valued at $725,929 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 20,543 shares of Amkor Technology, Inc.. This represents a change in shares of -21.53% 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 031652100 16,121 -4,422 -21.53 726 -10.60 0.0011
2026-02-06 2025-12-31 13F AMKOR TECHNOLOGY COM 031652100 20,543 1,628 8.61 811 51.02 0.0014
2025-11-06 2025-09-30 13F AMKOR TECHNOLOGY COM 031652100 18,915 -3,081 -14.01 537 16.49 0.0011
2025-08-07 2025-06-30 13F AMKOR TECHNOLOGY COM 031652100 21,996 3,707 20.27 462 39.70 0.0009
2025-05-08 2025-03-31 13F AMKOR TECHNOLOGY COM 031652100 18,289 -1,870 -9.28 330 -36.17 0.0007
2025-02-14 2024-12-31 13F AMKOR TECHNOLOGY COM 031652100 20,159 250 1.26 518 -15.11 0.0012
2024-11-14 2024-09-30 13F AMKOR TECHNOLOGY COM 031652100 19,909 -14,391 -41.96 609 -55.61 0.0015
2024-08-13 2024-06-30 13F AMKOR TECHNOLOGY COM 031652100 34,300 -3,494 -9.24 1,373 12.64 0.0037
2024-05-08 2024-03-31 13F AMKOR TECHNOLOGY COM 031652100 37,794 4,846 14.71 1,218 11.13 0.0032
2024-02-14 2023-12-31 13F AMKOR TECHNOLOGY COM 031652100 32,948 5,137 18.47 1,096 74.52 0.0033
2023-11-13 2023-09-30 13F AMKOR TECHNOLOGY COM 031652100 27,811 1,432 5.43 629 -19.90 0.0020
2023-08-10 2023-06-30 13F AMKOR TECHNOLOGY COM 031652100 26,379 2,052 8.44 785 24.05 0.0023
2023-05-26 2023-03-31 13F/A-1 AMKOR TECHNOLOGY COM 031652100 24,327 -4,462 -15.50 633 -8.41 0.0019
2023-05-12 2023-03-31 13F AMKOR TECHNOLOGY COM 031652100 24,327 -4,462 633 0.0020
2023-02-02 2022-12-31 13F AMKOR TECHNOLOGY COM 031652100 28,789 2,517 9.58 690 54.36 0.0024
2022-11-07 2022-09-30 13F AMKOR TECHNOLOGY COM 031652100 26,272 -2,869 -9.85 447 -9.51 0.0017
2022-08-01 2022-06-30 13F AMKOR TECHNOLOGY COM 031652100 29,141 -14,784 -33.66 494 -48.22 0.0016
2022-05-10 2022-03-31 13F AMKOR TECHNOLOGY COM 031652100 43,925 -11,777 -21.14 954 -30.92 0.0020
2022-02-08 2021-12-31 13F AMKOR TECHNOLOGY COM 031652100 55,702 19,315 53.08 1,381 52.09 0.0027
2021-11-12 2021-09-30 13F AMKOR TECHNOLOGY COM 031652100 36,387 1,783 5.15 908 10.87 0.0026
2021-08-13 2021-06-30 13F AMKOR TECHNOLOGY COM 031652100 34,604 -332 -0.95 819 -1.09 0.0024
2021-05-14 2021-03-31 13F AMKOR TECHNOLOGY COM 031652100 34,936 12,822 57.98 828 148.65 0.0026
2021-02-09 2020-12-31 13F AMKOR TECHNOLOGY COM 031652100 22,114 9,879 80.74 333 143.07 0.0012
2020-11-13 2020-09-30 13F AMKOR TECHNOLOGY COM 031652100 12,235 -1,332 -9.82 137 -17.96 0.0006
2020-08-03 2020-06-30 13F AMKOR TECHNOLOGY COM 031652100 13,567 13,567 167 0.0009
2020-05-15 2020-03-31 13F AMKOR TECHNOLOGY COM 031652100 0 -13,317 -100.00 0 -100.00
2020-02-12 2019-12-31 13F AMKOR TECHNOLOGY COM 031652100 13,317 2,126 19.00 173 69.61 0.0008
2019-11-12 2019-09-30 13F AMKOR TECHNOLOGY COM 031652100 11,191 351 3.24 102 25.93 0.0006
2019-08-13 2019-06-30 13F AMKOR TECHNOLOGY COM 031652100 10,840 -287 -2.58 81 -14.74 0.0005
2019-05-15 2019-03-31 13F AMKOR TECHNOLOGY COM 031652100 11,127 343 3.18 95 33.80 0.0006
2019-02-14 2018-12-31 13F AMKOR TECHNOLOGY COM 031652100 10,784 -1,738 -13.88 71 -23.66 0.0005
2018-11-14 2018-09-30 13F AMKOR TECHNOLOGY COM 031652100 12,522 -961 -7.13 93 -19.83 0.0006
2018-08-13 2018-06-30 13F AMKOR TECHNOLOGY COM 031652100 13,483 455 3.49 116 -12.12 0.0008
2018-05-14 2018-03-31 13F AMKOR TECHNOLOGY COM 031652100 13,028 -2,354 -15.30 132 -14.84 0.0009
2018-02-14 2017-12-31 13F AMKOR TECHNOLOGY COM 031652100 15,382 15,382 155 0.0011
2017-08-11 2017-06-30 13F AMKOR TECHNOLOGY COM 031652100 0 -12,067 -100.00 0 -100.00
2017-05-12 2017-03-31 13F/A-2 AMKOR TECHNOLOGY COM 031652100 12,067 -4,989 -29.25 140 -22.22 0.0015
2017-05-08 2017-03-31 13F/A-1 AMKOR TECHNOLOGY COM 031652100 12,067 0 140 0.0015
2017-04-25 2017-03-31 13F AMKOR TECHNOLOGY COM 031652100 12,067 140
2017-02-13 2016-12-31 13F AMKOR TECHNOLOGY COM 031652100 17,056 6,192 57.00 180 69.81 0.0020
2016-11-10 2016-09-30 13F AMKOR TECHNOLOGY COM 031652100 10,864 -2,423 -18.24 106 39.47 0.0015
2016-08-12 2016-06-30 13F AMKOR TECHNOLOGY COM 031652100 13,287 504 3.94 76 1.33 0.0010
2016-05-06 2016-03-31 13F AMKOR TECHNOLOGY COM 031652100 12,783 -1,617 -11.23 75 -14.77 0.0010
2016-02-05 2015-12-31 13F AMKOR TECHNOLOGY COM 031652100 14,400 14,400 0.00 88 0.0011
2015-11-06 2015-09-30 13F AMKOR TECHNOLOGY COM 031652100 0 -12,483 -100.00 0 -100.00
2015-08-11 2015-06-30 13F AMKOR TECHNOLOGY COM 031652100 12,483 -4,003 -24.28 75 -48.63 0.0010
2015-05-08 2015-03-31 13F AMKOR TECHNOLOGY COM 031652100 16,486 16,486 0.00 146 0.0017
2015-01-30 2014-12-31 13F AMKOR TECHNOLOGY COM 031652100 0 -33,711 -100.00 0 -100.00
2014-11-06 2014-09-30 13F AMKOR TECHNOLOGY COM 031652100 33,711 -7,631 -18.46 284 -38.53 0.0038
2014-08-08 2014-06-30 13F AMKOR TECHNOLOGY COM 031652100 41,342 -29,598 -41.72 462 -5.13 0.0060
2014-05-07 2014-03-31 13F AMKOR TECHNOLOGY COM 031652100 70,940 70,940 59.24 487 154.97 0.0061
2014-02-04 2013-12-31 13F AMKOR TECHNOLOGY COM 031652100 0 -44,548 -100.00 0 -100.00
2013-11-07 2013-09-30 13F AMKOR TECHNOLOGY COM 031652100 44,548 -3,094 -6.49 191 -4.98 0.0045
2013-07-25 2013-06-30 13F AMKOR TECHNOLOGY COM 031652100 47,642 47,642 201 0.0039
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.