Amkor Technology, Inc.
MX ˙ BMV ˙ US0316521006
SecurityMX:AMKR / Amkor Technology, Inc.
InstitutionMan Group plc
Latest Disclosed Ownership469,338 shares
Latest Disclosed Value $ 21,134,290
Man Group plc reports 1,367.41% increase in ownership of AMKR / Amkor Technology, Inc.

On May 15, 2026 - Man Group plc filed a 13F-HR form disclosing ownership of 469,338 shares of Amkor Technology, Inc. (MX:AMKR) valued at $21,134,290 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 31,984 shares of Amkor Technology, Inc.. This represents a change in shares of 1,367.41% 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 469,338 437,354 1,367.41 21,134 1,574.64 0.0383
2026-02-17 2025-12-31 13F AMKOR TECHNOLOGY COM 031652100 31,984 31,984 1,263 0.0021
2025-05-15 2025-03-31 13F AMKOR TECHNOLOGY COM 031652100 0 -177,834 -100.00 0 -100.00
2025-02-14 2024-12-31 13F AMKOR TECHNOLOGY COM 031652100 177,834 -238,800 -57.32 4,569 -64.17 0.0120
2024-11-14 2024-09-30 13F AMKOR TECHNOLOGY COM 031652100 416,634 -77,251 -15.64 12,749 -35.50 0.0332
2024-08-14 2024-06-30 13F AMKOR TECHNOLOGY COM 031652100 493,885 62,791 14.57 19,765 42.21 0.0499
2024-05-15 2024-03-31 13F AMKOR TECHNOLOGY COM 031652100 431,094 37,677 9.58 13,898 6.19 0.0350
2024-02-14 2023-12-31 13F AMKOR TECHNOLOGY COM 031652100 393,417 13,089 234.56 0.0364
2023-11-14 2023-09-30 13F AMKOR TECHNOLOGY COM 031652100 3,912 -41.74 0.0121
2023-08-14 2023-06-30 13F AMKOR TECHNOLOGY COM 031652100 225,717 6,715 52.48 0.0207
2023-05-15 2023-03-31 13F AMKOR TECHNOLOGY COM 031652100 4,404 38.27 0.0157
2023-02-14 2022-12-31 13F AMKOR TECHNOLOGY COM 031652100 132,850 8,629 6.95 3,186 50.45 0.0114
2022-11-14 2022-09-30 13F AMKOR TECHNOLOGY COM 031652100 124,221 2,117 53.29 0.0098
2022-08-15 2022-06-30 13F AMKOR TECHNOLOGY COM 031652100 1,381 17.23 0.0059
2022-05-16 2022-03-31 13F AMKOR TECHNOLOGY COM 031652100 54,268 2,109 4.04 1,178 -8.89 0.0041
2022-02-14 2021-12-31 13F AMKOR TECHNOLOGY COM 031652100 52,159 29,719 132.44 1,293 130.89 0.0042
2021-11-15 2021-09-30 13F AMKOR TECHNOLOGY COM 031652100 22,440 -2,953 -11.63 560 -6.82 0.0020
2021-08-16 2021-06-30 13F AMKOR TECHNOLOGY COM 031652100 25,393 -21,386 -45.72 601 -45.81 0.0021
2021-05-17 2021-03-31 13F AMKOR TECHNOLOGY COM 031652100 46,779 -139,494 -74.89 1,109 -60.52 0.0049
2021-02-16 2020-12-31 13F AMKOR TECHNOLOGY COM 031652100 186,273 -22,807 -10.91 2,809 19.94 0.0123
2020-11-16 2020-09-30 13F AMKOR TECHNOLOGY COM 031652100 209,080 13,585 6.95 2,342 -2.70 0.0092
2020-08-14 2020-06-30 13F AMKOR TECHNOLOGY COM 031652100 195,495 15,995 8.91 2,407 72.17 0.0121
2020-05-15 2020-03-31 13F AMKOR TECHNOLOGY COM 031652100 179,500 -535,996 -74.91 1,398 -84.97 0.0091
2020-02-18 2019-12-31 13F AMKOR TECHNOLOGY COM 031652100 715,496 -15,562 -2.13 9,301 39.82 0.0306
2019-11-14 2019-09-30 13F AMKOR TECHNOLOGY COM 031652100 731,058 554,734 314.61 6,652 405.47 0.0247
2019-08-14 2019-06-30 13F AMKOR TECHNOLOGY COM 031652100 176,324 -39,238 -18.20 1,316 -28.52 0.0048
2019-05-15 2019-03-31 13F AMKOR TECHNOLOGY COM 031652100 215,562 215,562 1,841 0.0070
2019-02-14 2018-12-31 13F AMKOR TECHNOLOGY COM 031652100 0 -49,170 -100.00 0 -100.00
2018-11-14 2018-09-30 13F AMKOR TECHNOLOGY COM 031652100 49,170 49,170 363 0.0013
2018-08-14 2018-06-30 13F AMKOR TECHNOLOGY COM 031652100 0 -217,187 -100.00 0 -100.00
2018-05-15 2018-03-31 13F AMKOR TECHNOLOGY COM 031652100 217,187 217,187 2,200 0.0101
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.