Amkor Technology, Inc.
MX ˙ BMV ˙ US0316521006
SecurityMX:AMKR / Amkor Technology, Inc.
InstitutionPrudential Financial Inc
Latest Disclosed Ownership25,570 shares
Latest Disclosed Value $ 1,151,417
Prudential Financial Inc reports 12.98% decrease in ownership of AMKR / Amkor Technology, Inc.

On May 13, 2026 - Prudential Financial Inc filed a 13F-HR form disclosing ownership of 25,570 shares of Amkor Technology, Inc. (MX:AMKR) valued at $1,151,417 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 29,385 shares of Amkor Technology, Inc.. This represents a change in shares of -12.98% 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.

Upgrade to unlock premium data and export to Excel .

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 25,570 -3,815 -12.98 1,151 -0.78 0.0008
2026-02-13 2025-12-31 13F AMKOR TECHNOLOGY COM 031652100 29,385 -9,016 -23.48 1,160 6.42 0.0014
2025-11-13 2025-09-30 13F AMKOR TECHNOLOGY COM 031652100 38,401 -10,920 -22.14 1,091 5.31 0.0013
2025-08-12 2025-06-30 13F AMKOR TECHNOLOGY COM 031652100 49,321 -18,082 -26.83 1,035 -14.95 0.0013
2025-05-13 2025-03-31 13F AMKOR TECHNOLOGY COM 031652100 67,403 -99,863 -59.70 1,217 -71.68 0.0017
2025-02-11 2024-12-31 13F AMKOR TECHNOLOGY COM 031652100 167,266 -29,502 -14.99 4,297 -28.63 0.0059
2024-11-14 2024-09-30 13F AMKOR TECHNOLOGY COM 031652100 196,768 -266,453 -57.52 6,021 -67.52 0.0085
2024-08-13 2024-06-30 13F AMKOR TECHNOLOGY COM 031652100 463,221 6,537 1.43 18,538 25.91 0.0278
2024-05-14 2024-03-31 13F AMKOR TECHNOLOGY COM 031652100 456,684 -72,165 -13.65 14,723 -16.32 0.0207
2024-02-13 2023-12-31 13F AMKOR TECHNOLOGY COM 031652100 528,849 100,294 23.40 17,595 81.66 0.0266
2023-11-13 2023-09-30 13F AMKOR TECHNOLOGY COM 031652100 428,555 18,949 4.63 9,685 -20.52 0.0152
2023-08-11 2023-06-30 13F AMKOR TECHNOLOGY COM 031652100 409,606 -127,299 -23.71 12,186 -12.78 0.0177
2023-05-12 2023-03-31 13F AMKOR TECHNOLOGY COM 031652100 536,905 -12,295 -2.24 13,970 6.08 0.0219
2023-02-14 2022-12-31 13F AMKOR TECHNOLOGY COM 031652100 549,200 18,702 3.53 13,170 45.59 0.0222
2022-11-04 2022-09-30 13F AMKOR TECHNOLOGY COM 031652100 530,498 98,037 22.67 9,045 23.40 0.0153
2022-08-15 2022-06-30 13F AMKOR TECHNOLOGY COM 031652100 432,461 -2,605 -0.60 7,330 -22.43 0.0116
2022-05-13 2022-03-31 13F AMKOR TECHNOLOGY COM 031652100 435,066 -145,235 -25.03 9,449 -34.31 0.0126
2022-02-14 2021-12-31 13F AMKOR TECHNOLOGY COM 031652100 580,301 -255,819 -30.60 14,385 -31.04 0.0179
2021-11-15 2021-09-30 13F AMKOR TECHNOLOGY COM 031652100 836,120 280,637 50.52 20,861 58.66 0.0291
2021-08-16 2021-06-30 13F AMKOR TECHNOLOGY COM 031652100 555,483 286,782 106.73 13,148 106.37 0.0181
2021-05-12 2021-03-31 13F AMKOR TECHNOLOGY COM 031652100 268,701 -38,542 -12.54 6,371 37.51 0.0095
2021-08-16 2020-12-31 13F/A-1 AMKOR TECHNOLOGY COM 0015 031652100 307,243 1,636 0.54 4,633 35.35 0.0078
2021-02-16 2020-12-31 13F AMKOR TECHNOLOGY COM 031652100 307,243 1,636 4,634 0.0078
2020-11-16 2020-09-30 13F AMKOR TECHNOLOGY COM 031652100 305,607 57,252 23.05 3,423 11.97 0.0065
2020-08-12 2020-06-30 13F AMKOR TECHNOLOGY COM 031652100 248,355 -645,153 -72.20 3,057 -56.08 0.0059
2020-05-12 2020-03-31 13F AMKOR TECHNOLOGY COM 031652100 893,508 -829,077 -48.13 6,960 -68.92 0.0154
2020-02-11 2019-12-31 13F AMKOR TECHNOLOGY COM 031652100 1,722,585 48,335 2.89 22,394 46.98 0.0332
2019-11-13 2019-09-30 13F AMKOR TECHNOLOGY COM 031652100 1,674,250 -334,429 -16.65 15,236 1.68 0.0242
2019-08-08 2019-06-30 13F AMKOR TECHNOLOGY COM 031652100 2,008,679 146,909 7.89 14,985 -5.75 0.0233
2019-05-15 2019-03-31 13F AMKOR TECHNOLOGY COM 031652100 1,861,770 143,887 8.38 15,900 41.10 0.0265
2019-02-07 2018-12-31 13F AMKOR TECHNOLOGY COM 031652100 1,717,883 86,979 5.33 11,269 -6.50 0.0198
2018-11-07 2018-09-30 13F AMKOR TECHNOLOGY COM 031652100 1,630,904 -103,932 -5.99 12,053 -19.12 0.0178
2018-08-13 2018-06-30 13F AMKOR TECHNOLOGY COM 031652100 1,734,836 -19,208 -1.10 14,903 -16.13 0.0223
2018-05-04 2018-03-31 13F AMKOR TECHNOLOGY COM 031652100 1,754,044 407,090 30.22 17,769 31.26 0.0271
2018-02-13 2017-12-31 13F AMKOR TECHNOLOGY COM 031652100 1,346,954 259,882 23.91 13,537 18.03 0.0184
2017-11-30 2017-09-30 13F/A-1 AMKOR TECHNOLOGY COM 031652100 1,087,072 156,110 16.77 11,469 26.10 0.1252
2017-08-07 2017-06-30 13F AMKOR TECHNOLOGY COM 031652100 930,962 -150,170 -13.89 9,095 -27.41 0.0135
2017-05-10 2017-03-31 13F AMKOR TECHNOLOGY COM 031652100 1,081,132 -351,600 -24.54 12,530 -17.10 0.0195
2017-02-07 2016-12-31 13F AMKOR TECHNOLOGY COM 031652100 1,432,732 -997,400 -41.04 15,115 -36.01 0.0243
2016-11-04 2016-09-30 13F AMKOR TECHNOLOGY COM 031652100 2,430,132 491,151 25.33 23,621 111.87 0.0390
2016-08-09 2016-06-30 13F AMKOR TECHNOLOGY COM 031652100 1,938,981 13,322 0.69 11,149 -1.70 0.0188
2016-05-09 2016-03-31 13F AMKOR TECHNOLOGY COM 031652100 1,925,659 -258,662 -11.84 11,342 -14.60 0.0203
2016-02-12 2015-12-31 13F AMKOR TECHNOLOGY COM 031652100 2,184,321 23,100 1.07 13,281 36.86 0.0240
2015-11-10 2015-09-30 13F AMKOR TECHNOLOGY COM 031652100 2,161,221 -211,900 -8.93 9,704 -31.62 0.0191
2015-08-06 2015-06-30 13F AMKOR TECHNOLOGY COM 031652100 2,373,121 69,500 3.02 14,191 -30.27 0.0252
2015-05-01 2015-03-31 13F AMKOR TECHNOLOGY COM 031652100 2,303,621 1,709,661 287.84 20,352 382.62 0.0353
2015-02-06 2014-12-31 13F AMKOR TECHNOLOGY COM 031652100 593,960 232,000 64.10 4,217 38.53 0.0076
2014-11-12 2014-09-30 13F AMKOR TECHNOLOGY COM 031652100 361,960 275,667 319.45 3,044 215.44 0.0057
2014-08-13 2014-06-30 13F AMKOR TECHNOLOGY COM 031652100 86,293 13,733 18.93 965 93.78 0.0017
2014-05-14 2014-03-31 13F AMKOR TECHNOLOGY COM 031652100 72,560 200 0.28 498 12.16 0.0009
2014-02-11 2013-12-31 13F AMKOR TECHNOLOGY COM 031652100 72,360 -700 -0.96 444 41.85 0.0009
2013-11-07 2013-09-30 13F AMKOR TECHNOLOGY COM 031652100 73,060 600 0.83 313 2.62 0.0007
2013-08-07 2013-06-30 13F AMKOR TECHNOLOGY COM 031652100 72,460 72,460 305 0.0007
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.