Amkor Technology, Inc.
MX ˙ BMV ˙ US0316521006
SecurityMX:AMKR / Amkor Technology, Inc.
InstitutionGuggenheim Capital Llc
Latest Disclosed Ownership24,930 shares
Latest Disclosed Value $ 1,122,598
Guggenheim Capital Llc reports 21.56% increase in ownership of AMKR / Amkor Technology, Inc.

On May 15, 2026 - Guggenheim Capital Llc filed a 13F-HR form disclosing ownership of 24,930 shares of Amkor Technology, Inc. (MX:AMKR) valued at $1,122,598 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 20,508 shares of Amkor Technology, Inc.. This represents a change in shares of 21.56% 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)
2026-05-15 2026-03-31 13F AMKOR TECHNOLOGY COM 031652100 24,930 4,422 21.56 1,123 38.69 0.0043
2026-02-17 2025-12-31 13F AMKOR TECHNOLOGY COM 031652100 20,508 -4,612 -18.36 810 13.46 0.0058
2025-11-13 2025-09-30 13F AMKOR TECHNOLOGY COM 031652100 25,120 -367 -1.44 713 33.52 0.0052
2025-08-13 2025-06-30 13F AMKOR TECHNOLOGY COM 031652100 25,487 -3,001 -10.53 535 3.89 0.0042
2025-05-14 2025-03-31 13F AMKOR TECHNOLOGY COM 031652100 28,488 -864 -2.94 514 -31.83 0.0047
2025-02-13 2024-12-31 13F AMKOR TECHNOLOGY COM 031652100 29,352 -197,363 -87.05 754 -89.13 0.0061
2024-11-13 2024-09-30 13F AMKOR TECHNOLOGY COM 031652100 226,715 -20,874 -8.43 6,937 -29.99 0.0485
2024-08-14 2024-06-30 13F AMKOR TECHNOLOGY COM 031652100 247,589 199,114 410.76 9,909 534.31 0.0703
2024-05-14 2024-03-31 13F AMKOR TECHNOLOGY COM 031652100 48,475 -18,858 -28.01 1,563 -30.27 0.0110
2024-02-14 2023-12-31 13F AMKOR TECHNOLOGY COM 031652100 67,333 -29,228 -30.27 2,240 2.66 0.0169
2023-11-14 2023-09-30 13F AMKOR TECHNOLOGY COM 031652100 96,561 5,272 5.78 2,182 -19.63 0.0188
2023-08-11 2023-06-30 13F AMKOR TECHNOLOGY COM 031652100 91,289 7,653 9.15 2,716 24.77 0.0213
2023-05-11 2023-03-31 13F AMKOR TECHNOLOGY COM 031652100 83,636 10,418 14.23 2,176 23.99 0.0183
2023-02-14 2022-12-31 13F AMKOR TECHNOLOGY COM 031652100 73,218 -7,904 -9.74 1,756 26.90 0.0154
2022-11-14 2022-09-30 13F AMKOR TECHNOLOGY COM 031652100 81,122 14,917 22.53 1,383 23.26 0.0127
2022-08-15 2022-06-30 13F AMKOR TECHNOLOGY COM 031652100 66,205 -8,555 -11.44 1,122 -30.87 0.0089
2022-05-16 2022-03-31 13F AMKOR TECHNOLOGY COM 031652100 74,760 -6,102 -7.55 1,623 -19.05 0.0098
2022-02-14 2021-12-31 13F AMKOR TECHNOLOGY COM 031652100 80,862 70,756 700.14 2,005 695.63 0.0105
2021-11-15 2021-09-30 13F AMKOR TECHNOLOGY COM 031652100 10,106 1,551 18.13 252 24.75 0.0015
2021-08-13 2021-06-30 13F AMKOR TECHNOLOGY COM 031652100 8,555 8,555 202 0.0012
2019-02-14 2018-12-31 13F AMKOR TECHNOLOGY COM 031652100 0 -31,311 -100.00 0 -100.00
2018-11-14 2018-09-30 13F AMKOR TECHNOLOGY COM 031652100 31,311 -426 -1.34 231 -15.38 0.0015
2018-08-14 2018-06-30 13F AMKOR TECHNOLOGY COM 031652100 31,737 -51,223 -61.74 273 -67.46 0.0018
2018-05-15 2018-03-31 13F AMKOR TECHNOLOGY COM 031652100 82,960 27,627 49.93 839 51.17 0.0020
2018-02-14 2017-12-31 13F AMKOR TECHNOLOGY COM 031652100 55,333 13,820 33.29 555 26.14 0.0013
2017-11-14 2017-09-30 13F AMKOR TECHNOLOGY COM 031652100 41,513 -36,311 -46.66 440 -42.18 0.0010
2017-08-14 2017-06-30 13F AMKOR TECHNOLOGY COM 031652100 77,824 -7,490 -8.78 761 -23.05 0.0020
2017-05-15 2017-03-31 13F AMKOR TECHNOLOGY COM 031652100 85,314 20,576 31.78 989 44.80 0.0027
2017-02-14 2016-12-31 13F AMKOR TECHNOLOGY COM 031652100 64,738 64,738 -24.12 683 -30.94 0.0020
2015-11-16 2015-09-30 13F AMKOR TECHNOLOGY COM 031652100 0 -33,419 -100.00 0 -100.00
2015-08-14 2015-06-30 13F AMKOR TECHNOLOGY COM 031652100 33,419 -5,938 -15.09 200 -42.36 0.0005
2015-05-18 2015-03-31 13F/A-1 AMKOR TECHNOLOGY COM 031652100 39,357 -2,430 -5.82 347 16.84 0.0008
2015-05-15 2015-03-31 13F AMKOR TECHNOLOGY COM 031652100 39,357 347
2015-02-17 2014-12-31 13F AMKOR TECHNOLOGY COM 031652100 41,787 -71,085 -62.98 297 -68.70 0.0007
2014-11-14 2014-09-30 13F AMKOR TECHNOLOGY COM 031652100 112,872 59,265 110.55 949 58.17 0.0023
2014-08-14 2014-06-30 13F AMKOR TECHNOLOGY COM 031652100 53,607 28,182 110.84 600 244.83 0.0015
2014-05-16 2014-03-31 13F AMKOR TECHNOLOGY COM 031652100 25,425 -1,012 -3.83 174 7.41 0.0005
2014-02-14 2013-12-31 13F AMKOR TECHNOLOGY COM 031652100 26,437 315 1.21 162 44.64 0.0005
2013-11-14 2013-09-30 13F AMKOR TECHNOLOGY COM 031652100 26,122 1,019 4.06 112 5.66 0.0004
2013-08-22 2013-06-30 13F/A-1 AMKOR TECHNOLOGY COM 031652100 25,103 25,103 106 0.0004
2013-08-14 2013-06-30 13F AMKOR TECHNOLOGY COM 031652100 25,103 106 0.0004
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.