Amkor Technology, Inc.
MX ˙ BMV ˙ US0316521006
SecurityMX:AMKR / Amkor Technology, Inc.
InstitutionGsa Capital Partners Llp
Latest Disclosed Ownership30,804 shares
Latest Disclosed Value $ 1,387
Gsa Capital Partners Llp ownership in AMKR / Amkor Technology, Inc.

On May 8, 2026 - Gsa Capital Partners Llp filed a 13F-HR form disclosing ownership of 30,804 shares of Amkor Technology, Inc. (MX:AMKR) valued at $1,387 USD as of March 31, 2026. The entity filed a previous 13F-HR on July 22, 2025 disclosing 0 shares of Amkor Technology, Inc..

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)
2026-05-08 2026-03-31 13F AMKOR TECHNOLOGY COM 031652100 30,804 30,804 1 0.0862
2025-07-22 2025-06-30 13F AMKOR TECHNOLOGY COM 031652100 0 -15,867 -100.00 0 0.0000
2025-05-08 2025-03-31 13F AMKOR TECHNOLOGY COM 031652100 15,867 15,867 0 0.0259
2024-02-16 2023-12-31 13F AMKOR TECHNOLOGY COM 031652100 0 -18,932 -100.00 0 0.0000
2023-11-15 2023-09-30 13F AMKOR TECHNOLOGY COM 031652100 18,932 18,932 0 0.0367
2023-02-13 2022-12-31 13F AMKOR TECHNOLOGY COM 031652100 0 -29,543 -100.00 0 -100.00
2022-11-14 2022-09-30 13F AMKOR TECHNOLOGY COM 031652100 29,543 29,543 504 0.0668
2022-08-09 2022-06-30 13F AMKOR TECHNOLOGY COM 031652100 0 -24,418 -100.00 0 -100.00
2022-05-11 2022-03-31 13F AMKOR TECHNOLOGY COM 031652100 24,418 24,418 530 0.0711
2021-08-05 2021-06-30 13F AMKOR TECHNOLOGY COM 031652100 0 -22,225 -100.00 0 -100.00
2021-05-10 2021-03-31 13F AMKOR TECHNOLOGY COM 031652100 22,225 22,225 527 0.0874
2021-02-03 2020-12-31 13F AMKOR TECHNOLOGY COM 031652100 0 -39,816 -100.00 0 -100.00
2020-11-06 2020-09-30 13F AMKOR TECHNOLOGY COM 031652100 39,816 39,816 446 0.0744
2020-08-11 2020-06-30 13F AMKOR TECHNOLOGY COM 031652100 0 -13,260 -100.00 0 -100.00
2020-05-12 2020-03-31 13F AMKOR TECHNOLOGY COM 031652100 13,260 -78,256 -85.51 103 -91.34 0.0258
2020-02-12 2019-12-31 13F AMKOR TECHNOLOGY COM 031652100 91,516 -37,551 -29.09 1,190 1.28 0.1386
2019-11-12 2019-09-30 13F AMKOR TECHNOLOGY COM 031652100 129,067 73,999 134.38 1,175 185.89 0.1589
2019-08-06 2019-06-30 13F AMKOR TECHNOLOGY COM 031652100 55,068 55,068 411 0.0460
2019-02-12 2018-12-31 13F AMKOR TECHNOLOGY COM 031652100 0 -73,598 -100.00 0 -100.00
2018-11-13 2018-09-30 13F AMKOR TECHNOLOGY COM 031652100 73,598 73,598 544 0.0300
2018-05-11 2018-03-31 13F AMKOR TECHNOLOGY COM 031652100 0 -48,285 -100.00 0 -100.00
2018-02-14 2017-12-31 13F AMKOR TECHNOLOGY COM 031652100 48,285 37,626 353.00 485 333.04 0.0295
2017-11-20 2017-09-30 13F AMKOR TECHNOLOGY COM 031652100 10,659 -74,887 -87.54 112 -86.60 0.0076
2017-08-11 2017-06-30 13F AMKOR TECHNOLOGY COM 031652100 85,546 -71,649 -45.58 836 -54.12 0.0546
2017-05-15 2017-03-31 13F AMKOR TECHNOLOGY COM 031652100 157,195 115,549 277.46 1,822 315.03 0.0978
2017-02-14 2016-12-31 13F AMKOR TECHNOLOGY COM 031652100 41,646 25,651 160.37 439 183.23 0.0262
2016-11-14 2016-09-30 13F AMKOR TECHNOLOGY COM 031652100 15,995 -257,600 -94.15 155 -90.15 0.0083
2016-08-04 2016-06-30 13F AMKOR TECHNOLOGY COM 031652100 273,595 13,300 5.11 1,573 2.61 0.0870
2016-05-11 2016-03-31 13F AMKOR TECHNOLOGY COM 031652100 260,295 -167,193 -39.11 1,533 -41.02 0.0977
2016-02-09 2015-12-31 13F AMKOR TECHNOLOGY COM 031652100 427,488 -192,063 -31.00 2,599 -6.58 0.1272
2015-11-13 2015-09-30 13F AMKOR TECHNOLOGY COM 031652100 619,551 198,714 47.22 2,782 10.53 0.1368
2015-08-14 2015-06-30 13F AMKOR TECHNOLOGY COM 031652100 420,837 -58,976 -12.29 2,517 -40.62 0.0967
2015-05-14 2015-03-31 13F AMKOR TECHNOLOGY COM 031652100 479,813 199,173 70.97 4,239 112.69 0.1685
2015-02-05 2014-12-31 13F AMKOR TECHNOLOGY COM 031652100 280,640 73,624 35.56 1,993 14.47 0.1390
2014-11-06 2014-09-30 13F AMKOR TECHNOLOGY COM 031652100 207,016 43,921 26.93 1,741 -4.50 0.0916
2014-08-08 2014-06-30 13F AMKOR TECHNOLOGY COM 031652100 163,095 26,800 19.66 1,823 94.97 0.0821
2014-05-14 2014-03-31 13F AMKOR TECHNOLOGY COM 031652100 136,295 62,200 83.95 935 105.95 0.0665
2014-02-12 2013-12-31 13F AMKOR TECHNOLOGY COM 031652100 74,095 730 1.00 454 44.13 0.0359
2013-11-14 2013-09-30 13F AMKOR TECHNOLOGY COM 031652100 73,365 18,600 33.96 315 36.36 0.0249
2013-08-13 2013-06-30 13F AMKOR TECHNOLOGY COM 031652100 54,765 54,765 231 0.0274
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.