Amkor Technology, Inc.
MX ˙ BMV ˙ US0316521006
SecurityMX:AMKR / Amkor Technology, Inc.
InstitutionUbs Asset Management Americas Inc
Latest Disclosed Ownership293,072 shares
Latest Disclosed Value $ 13,197,032
Ubs Asset Management Americas Inc reports 5.99% increase in ownership of AMKR / Amkor Technology, Inc.

On May 13, 2026 - Ubs Asset Management Americas Inc filed a 13F-HR form disclosing ownership of 293,072 shares of Amkor Technology, Inc. (MX:AMKR) valued at $13,197,032 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 276,498 shares of Amkor Technology, Inc.. This represents a change in shares of 5.99% 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)
2026-05-13 2026-03-31 13F AMKOR TECHNOLOGY COM 031652100 293,072 16,574 5.99 13,197 20.90 0.0004
2026-02-13 2025-12-31 13F AMKOR TECHNOLOGY COM 031652100 276,498 -11,788 -4.09 10,916 33.33 0.0023
2025-11-14 2025-09-30 13F AMKOR TECHNOLOGY COM 031652100 288,286 -154,472 -34.89 8,187 -11.90 0.0018
2025-08-14 2025-06-30 13F AMKOR TECHNOLOGY COM 031652100 442,758 108,211 32.35 9,293 53.83 0.0019
2025-05-19 2025-03-31 13F AMKOR TECHNOLOGY COM 031652100 334,547 27,511 8.96 6,042 -23.41 0.0015
2025-02-14 2024-12-31 13F AMKOR TECHNOLOGY COM 031652100 307,036 26,146 9.31 7,888 -8.24 0.0018
2024-11-14 2024-09-30 13F AMKOR TECHNOLOGY COM 031652100 280,890 14,389 5.40 8,595 -19.41 0.0022
2024-08-14 2024-06-30 13F AMKOR TECHNOLOGY COM 031652100 266,501 135,343 103.19 10,665 152.25 0.0031
2024-05-15 2024-03-31 13F AMKOR TECHNOLOGY EQUITY US CM 031652100 131,158 -311 -0.24 4,229 -3.32 0.0015
2024-02-14 2023-12-31 13F AMKOR TECHNOLOGY EQUITY US CM 031652100 131,469 -991 -0.75 4,374 46.11 0.0017
2023-11-13 2023-09-30 13F AMKOR TECHNOLOGY EQUITY US CM 031652100 132,460 -13,046 -8.97 2,994 -20.95 0.0013
2023-08-11 2023-06-30 13F AMKOR TECHNOLOGY EQUITY US CM 031652100 145,506 0 0.00 3,786 0.00 0.0018
2023-05-15 2023-03-31 13F AMKOR TECHNOLOGY EQUITY US CM 031652100 145,506 145,506 3,786 0.0018
2023-02-14 2022-12-31 13F AMKOR TECHNOLOGY EQUITY US CM 031652100 0 -118,978 -100.00 0 -100.00
2022-11-14 2022-09-30 13F AMKOR TECHNOLOGY EQUITY US CM 031652100 118,978 -25,339 -17.56 2,029 -17.09 0.0011
2022-08-12 2022-06-30 13F AMKOR TECHNOLOGY EQUITY US CM 031652100 144,317 -3,617 -2.45 2,446 -23.87 0.0013
2022-05-16 2022-03-31 13F AMKOR TECHNOLOGY EQUITY US CM 031652100 147,934 -6,728 -4.35 3,213 -16.20 0.0014
2022-02-14 2021-12-31 13F AMKOR TECHNOLOGY EQUITY US CM 031652100 154,662 -4,600 -2.89 3,834 -3.50 0.0015
2021-11-15 2021-09-30 13F AMKOR TECHNOLOGY EQUITY US CM 031652100 159,262 16,657 11.68 3,974 17.72 0.0016
2021-08-16 2021-06-30 13F AMKOR TECHNOLOGY EQUITY US CM 031652100 142,605 2,078 1.48 3,375 1.32 0.0014
2021-05-14 2021-03-31 13F AMKOR TECHNOLOGY EQUITY US CM 031652100 140,527 -8,812 -5.90 3,332 47.91 0.0015
2021-03-01 2020-12-31 13F/A-1 AMKOR TECHNOLOGY EQUITY US CM 031652100 149,339 322 0.22 2,252 35.01 0.0011
2021-02-17 2020-12-31 13F AMKOR TECHNOLOGY EQUITY US CM 031652100 149,017 0 1,669 0.1574
2020-11-13 2020-09-30 13F AMKOR TECHNOLOGY EQUITY US CM 031652100 149,017 -918 -0.61 1,669 -9.59 0.0009
2020-08-14 2020-06-30 13F AMKOR TECHNOLOGY EQUITY US CM 031652100 149,935 -1,433 -0.95 1,846 56.49 0.0011
2020-05-15 2020-03-31 13F AMKOR TECHNOLOGY EQUITY US CM 031652100 151,368 19,567 14.85 1,179 -31.17 0.0008
2020-02-14 2019-12-31 13F AMKOR TECHNOLOGY EQUITY US CM 031652100 131,801 -508 -0.38 1,713 42.28 0.0010
2019-11-14 2019-09-30 13F AMKOR TECHNOLOGY EQUITY US CM 031652100 132,309 15,098 12.88 1,204 37.76 0.0008
2019-08-15 2019-06-30 13F AMKOR TECHNOLOGY EQUITY US CM 031652100 117,211 9,772 9.10 874 -4.69 0.0006
2019-05-14 2019-03-31 13F AMKOR TECHNOLOGY EQUITY US CM 031652100 107,439 9,594 9.81 918 43.06 0.0007
2019-02-13 2018-12-31 13F AMKOR TECHNOLOGY EQUITY US CM 031652100 97,845 9,862 11.21 642 -1.38 0.0006
2018-11-13 2018-09-30 13F AMKOR TECHNOLOGY EQUITY US CM 031652100 87,983 -12,233 -12.21 650 -24.42 0.0005
2018-08-14 2018-06-30 13F AMKOR TECHNOLOGY EQUITY US CM 031652100 100,216 3,469 3.59 861 -12.24 0.0007
2018-05-14 2018-03-31 13F AMKOR TECHNOLOGY EQUITY US CM 031652100 96,747 -1,043 -1.07 980 -0.20 0.0008
2018-02-09 2017-12-31 13F AMKOR TECHNOLOGY EQUITY US CM 031652100 97,790 1,703 1.77 983 -3.06 0.0008
2017-11-13 2017-09-30 13F AMKOR TECHNOLOGY EQUITY US CM 031652100 96,087 15,603 19.39 1,014 28.88 0.0009
2017-08-11 2017-06-30 13F AMKOR TECHNOLOGY EQUITY US CM 031652100 80,484 -3,736 -4.44 786 -19.47 0.0008
2017-05-04 2017-03-31 13F AMKOR TECHNOLOGY EQUITY US CM 031652100 84,220 -1,741 -2.03 976 7.73 0.0010
2017-03-09 2016-12-31 13F/A-1 AMKOR TECHNOLOGY EQUITY US CM 031652100 85,961 -28,673 -25.01 906 -18.67 0.0010
2017-02-14 2016-12-31 13F AMKOR TECHNOLOGY EQUITY US CM 031652100 85,961 906
2016-11-04 2016-09-30 13F AMKOR TECHNOLOGY EQUITY US CM 031652100 114,634 11,301 10.94 1,114 87.23 0.0012
2016-11-29 2016-06-30 13F/A-1 AMKOR TECHNOLOGY EQUITY US CM 031652100 103,333 0 0.00 595 -2.30 0.0007
2016-08-09 2016-06-30 13F AMKOR TECHNOLOGY EQUITY US CM 031652100 103,333 595
2016-05-12 2016-03-31 13F AMKOR TECHNOLOGY EQUITY US CM 031652100 103,333 -19,628 -15.96 609 -18.47 0.0007
2016-02-12 2015-12-31 13F AMKOR TECHNOLOGY EQUITY US CM 031652100 122,961 3,233 2.70 747 39.11 0.0009
2015-10-29 2015-09-30 13F AMKOR TECHNOLOGY EQUITY US CM 031652100 119,728 25,834 27.51 537 -4.45 0.0006
2015-08-12 2015-06-30 13F AMKOR TECHNOLOGY EQUITY US CM 031652100 93,894 1,900 2.07 562 -30.87 0.0005
2015-05-04 2015-03-31 13F AMKOR TECHNOLOGY EQUITY US CM 031652100 91,994 91,994 0.00 813 0.0008
2015-02-02 2014-12-31 13F AMKOR TECHNOLOGY EQUITY US CM 031652100 0 -89,194 -100.00 0 -100.00
2014-10-28 2014-09-30 13F AMKOR TECHNOLOGY EQUITY US CM 031652100 89,194 23,800 36.39 750 2.60 0.0007
2014-08-13 2014-06-30 13F AMKOR TECHNOLOGY EQUITY US CM 031652100 65,394 16,200 32.93 731 116.91 0.0007
2014-05-23 2014-03-31 13F AMKOR TECHNOLOGY EQUITY US CM 031652100 49,194 0 0.00 337 11.59 0.0004
2014-01-31 2013-12-31 13F AMKOR TECHNOLOGY EQUITY US CM 031652100 49,194 0 0.00 302 43.13 0.0003
2013-11-08 2013-09-30 13F AMKOR TECHNOLOGY EQUITY US CM 031652100 49,194 0 0.00 211 1.93 0.0003
2013-08-15 2013-06-30 13F/A-1 AMKOR TECHNOLOGY EQUITY US CM 031652100 49,194 49,194 207 0.0003
2013-08-13 2013-06-30 13F AMKOR TECHNOLOGY EQUITY US CM 031652100 49,194 207 0.0003
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.