Amkor Technology, Inc.
MX ˙ BMV ˙ US0316521006
SecurityMX:AMKR / Amkor Technology, Inc.
InstitutionKBC Group NV
Latest Disclosed Ownership28,529 shares
Latest Disclosed Value $ 1,285
KBC Group NV reports 33.38% decrease in ownership of AMKR / Amkor Technology, Inc.

On May 7, 2026 - KBC Group NV filed a 13F-HR form disclosing ownership of 28,529 shares of Amkor Technology, Inc. (MX:AMKR) valued at $1,285 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 26, 2026 disclosing 42,823 shares of Amkor Technology, Inc.. This represents a change in shares of -33.38% 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)
2026-05-07 2026-03-31 13F AMKOR TECHNOLOGY COM 031652100 28,529 -14,294 -33.38 1 0.00 0.0032
2026-01-26 2025-12-31 13F AMKOR TECHNOLOGY COM 031652100 42,823 -5,999 -12.29 2 0.00 0.0039
2026-01-20 2025-09-30 13F AMKOR TECHNOLOGY COM 031652100 48,822 2,635 5.71 1 0.0033
2025-08-08 2025-06-30 13F AMKOR TECHNOLOGY COM 031652100 46,187 -25,392 -35.47 1 -100.00 0.0026
2025-04-25 2025-03-31 13F AMKOR TECHNOLOGY COM 031652100 71,579 -32,291 -31.09 1 -50.00 0.0040
2025-01-22 2024-12-31 13F AMKOR TECHNOLOGY COM 031652100 103,870 1,855 1.82 3 -33.33 0.0074
2024-11-06 2024-09-30 13F AMKOR TECHNOLOGY COM 031652100 102,015 1,225 1.22 3 -25.00 0.0094
2024-07-17 2024-06-30 13F AMKOR TECHNOLOGY COM 031652100 100,790 595 0.59 4 33.33 0.0122
2024-05-08 2024-03-31 13F AMKOR TECHNOLOGY COM 031652100 100,195 -535 -0.53 3 0.00 0.0103
2024-02-13 2023-12-31 13F AMKOR TECHNOLOGY COM 031652100 100,730 475 0.47 3 50.00 0.0119
2024-02-15 2023-09-30 13F/A-1 AMKOR TECHNOLOGY COM 031652100 100,255 16,600 19.84 2 0.00 0.0092
2023-11-22 2023-09-30 13F AMKOR TECHNOLOGY COM 031652100 83,655 0 2 0.0104
2024-02-15 2023-06-30 13F/A-1 AMKOR TECHNOLOGY COM 031652100 83,655 0 0.00 2 0.00 0.0102
2023-07-28 2023-06-30 13F AMKOR TECHNOLOGY COM 031652100 83,655 83,655 2 0.0104
2024-02-14 2023-03-31 13F/A-1 AMKOR TECHNOLOGY COM 031652100 83,655 1,712 2.09 2 100.00 0.0092
2024-02-14 2022-12-31 13F/A-1 AMKOR TECHNOLOGY COM 031652100 81,943 3,540 4.52 2 0.00 0.0095
2023-02-13 2022-12-31 13F AMKOR TECHNOLOGY COM 031652100 78,403 0 1 0.0000
2024-02-15 2022-09-30 13F/A-1 AMKOR TECHNOLOGY COM 031652100 78,403 18,431 30.73 1 0.00 0.0069
2022-11-08 2022-09-30 13F AMKOR TECHNOLOGY COM 031652100 78,403 18,431 1,337 0.0070
2024-02-14 2022-06-30 13F/A-1 AMKOR TECHNOLOGY COM 031652100 59,972 20,150 50.60 1 -99.88 0.0051
2022-07-26 2022-06-30 13F AMKOR TECHNOLOGY COM 031652100 59,972 20,150 1,017 0.0051
2024-02-14 2022-03-31 13F/A-1 AMKOR TECHNOLOGY COM 031652100 39,822 -14,080 -26.12 1 -100.00 0.0034
2022-05-06 2022-03-31 13F AMKOR TECHNOLOGY COM 031652100 39,822 -14,080 865 0.0032
2024-02-14 2021-12-31 13F/A-1 AMKOR TECHNOLOGY COM 031652100 53,902 42,213 361.13 1 -99.66 0.0044
2022-02-03 2021-12-31 13F AMKOR TECHNOLOGY COM 031652100 53,902 42,213 1,336 0.0042
2021-11-10 2021-09-30 13F AMKOR TECHNOLOGY COM 031652100 11,689 0 0.00 292 5.42 0.0011
2022-02-15 2021-06-30 13F/A-1 AMKOR TECHNOLOGY COM 031652100 11,689 0 0.00 277 0.00 0.0010
2021-08-11 2021-06-30 13F AMKOR TECHNOLOGY COM 031652100 11,689 0 277 0.0010
2022-02-14 2021-03-31 13F/A-1 AMKOR TECHNOLOGY COM 031652100 11,689 0 0.00 277 -84.29 0.0011
2021-04-26 2021-03-31 13F AMKOR TECHNOLOGY COM 031652100 11,689 0 277 0.0011
2022-02-14 2020-12-31 13F/A-1 AMKOR TECHNOLOGY COM 031652100 11,689 0 0.00 1,763 1,245.80 0.0008
2021-02-10 2020-12-31 13F AMKOR TECHNOLOGY COM 031652100 11,689 0 176 0.0008
2022-02-14 2020-09-30 13F/A-1 AMKOR TECHNOLOGY COM 031652100 11,689 -122,345 -91.28 131 -92.06 0.0008
2020-10-28 2020-09-30 13F AMKOR TECHNOLOGY COM 031652100 11,689 -122,345 131 0.0008
2022-02-14 2020-06-30 13F/A-1 AMKOR TECHNOLOGY COM 031652100 134,034 -80,170 -37.43 1,650 -1.14 0.0109
2020-08-10 2020-06-30 13F AMKOR TECHNOLOGY COM 031652100 134,034 -80,170 1,650 0.0110
2020-05-04 2020-03-31 13F AMKOR TECHNOLOGY COM 031652100 214,204 162,826 316.92 1,669 149.85 0.0140
2020-02-11 2019-12-31 13F AMKOR TECHNOLOGY COM 031652100 51,378 0 0.00 668 42.74 0.0042
2019-11-07 2019-09-30 13F AMKOR TECHNOLOGY COM 031652100 51,378 0 0.00 468 22.19 0.0034
2019-08-08 2019-06-30 13F/A-1 AMKOR TECHNOLOGY COM 031652100 51,378 -33,537 -39.49 383 -47.17 0.0030
2019-07-30 2019-06-30 13F AMKOR TECHNOLOGY COM 031652100 51,378 -33,537 383
2019-08-07 2019-03-31 13F/A-1 AMKOR TECHNOLOGY COM 031652100 84,915 -16,009 -15.86 725 9.52 0.0060
2019-05-10 2019-03-31 13F AMKOR TECHNOLOGY COM 031652100 84,915 -16,009 725
2019-01-31 2018-12-31 13F AMKOR TECHNOLOGY COM 031652100 100,924 -70,229 -41.03 662 -47.67 0.0074
2018-11-14 2018-09-30 13F AMKOR TECHNOLOGY COM 031652100 171,153 78,779 85.28 1,265 59.52 0.0096
2018-08-03 2018-06-30 13F AMKOR TECHNOLOGY COM 031652100 92,374 92,374 793 0.0069
2016-02-11 2015-12-31 13F AMKOR TECHNOLOGY COM 031652100 0 0 0 0.0000
2015-11-12 2015-09-30 13F AMKOR TECHNOLOGY COM 031652100 0 -125,710 -100.00 0 -100.00
2015-12-16 2015-06-30 13F/A-1 AMKOR TECHNOLOGY COM 031652100 125,710 -35,571 -22.06 752 -47.23 0.0097
2015-07-31 2015-06-30 13F AMKOR TECHNOLOGY COM 031652100 125,710 752
2015-12-16 2015-03-31 13F/A-1 AMKOR TECHNOLOGY COM 031652100 161,281 -25,981 -13.87 1,425 7.14 0.0181
2015-04-30 2015-03-31 13F AMKOR TECHNOLOGY COM 031652100 161,281 1,425
2015-12-15 2014-12-31 13F/A-1 AMKOR TECHNOLOGY COM 031652100 187,262 187,262 1,330 0.0158
2015-02-12 2014-12-31 13F AMKOR TECHNOLOGY COM 031652100 187,262 1,330
2013-11-06 2013-09-30 13F AMKOR TECHNOLOGY COM 031652100 0 -39,273 -100.00 0 -100.00
2013-07-29 2013-06-30 13F AMKOR TECHNOLOGY COM 031652100 39,273 39,273 165 0.0031
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.