Amkor Technology, Inc.
MX ˙ BMV ˙ US0316521006
SecurityMX:AMKR / Amkor Technology, Inc.
InstitutionGotham Asset Management, LLC
ManagerJoel Greenblatt
Latest Disclosed Ownership1,073,270 shares
Latest Disclosed Value $ 48,329,348
Gotham Asset Management, LLC reports 10.01% decrease in ownership of AMKR / Amkor Technology, Inc.

On May 15, 2026 - Gotham Asset Management, LLC filed a 13F-HR form disclosing ownership of 1,073,270 shares of Amkor Technology, Inc. (MX:AMKR) valued at $48,329,348 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 1,192,652 shares of Amkor Technology, Inc.. This represents a change in shares of -10.01% 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 1,073,270 -119,382 -10.01 48,329 2.64 0.1480
2026-02-17 2025-12-31 13F AMKOR TECHNOLOGY COM 031652100 1,192,652 -221,067 -15.64 47,086 17.28 0.1719
2025-11-14 2025-09-30 13F AMKOR TECHNOLOGY COM 031652100 1,413,719 90,388 6.83 40,150 44.55 0.1748
2025-08-14 2025-06-30 13F AMKOR TECHNOLOGY COM 031652100 1,323,331 1,184,631 854.10 27,777 1,009.27 0.1662
2025-05-15 2025-03-31 13F AMKOR TECHNOLOGY COM 031652100 138,700 -11,791 -7.84 2,505 -35.23 0.0209
2025-02-14 2024-12-31 13F AMKOR TECHNOLOGY COM 031652100 150,491 -23,093 -13.30 3,866 -27.21 0.0367
2024-11-14 2024-09-30 13F AMKOR TECHNOLOGY COM 031652100 173,584 133,399 331.96 5,312 230.29 0.0549
2024-08-14 2024-06-30 13F AMKOR TECHNOLOGY COM 031652100 40,185 -4,512 -10.09 1,608 11.59 0.0208
2024-05-15 2024-03-31 13F AMKOR TECHNOLOGY COM 031652100 44,697 25,462 132.37 1,441 125.51 0.0218
2024-02-14 2023-12-31 13F AMKOR TECHNOLOGY COM 031652100 19,235 -838 -4.17 640 41.06 0.0119
2023-11-14 2023-09-30 13F AMKOR TECHNOLOGY COM 031652100 20,073 -17,339 -46.35 454 -59.30 0.0094
2023-08-14 2023-06-30 13F AMKOR TECHNOLOGY COM 031652100 37,412 19,726 111.53 1,113 141.96 0.0242
2023-05-15 2023-03-31 13F AMKOR TECHNOLOGY COM 031652100 17,686 -457 -2.52 460 5.75 0.0112
2023-02-14 2022-12-31 13F AMKOR TECHNOLOGY COM 031652100 18,143 -42,574 -70.12 435 -57.97 0.0122
2022-11-14 2022-09-30 13F AMKOR TECHNOLOGY COM 031652100 60,717 41,205 211.18 1,035 212.69 0.0310
2022-08-15 2022-06-30 13F AMKOR TECHNOLOGY COM 031652100 19,512 6,358 48.34 331 15.73 0.0106
2022-05-16 2022-03-31 13F AMKOR TECHNOLOGY COM 031652100 13,154 2,558 24.14 286 8.75 0.0089
2022-02-14 2021-12-31 13F AMKOR TECHNOLOGY COM 031652100 10,596 -2,737 -20.53 263 -21.02 0.0085
2021-11-15 2021-09-30 13F AMKOR TECHNOLOGY COM 031652100 13,333 -13,976 -51.18 333 -48.45 0.0135
2021-08-16 2021-06-30 13F AMKOR TECHNOLOGY COM 031652100 27,309 -30,527 -52.78 646 -52.88 0.0274
2021-05-17 2021-03-31 13F AMKOR TECHNOLOGY COM 031652100 57,836 -95,776 -62.35 1,371 -40.80 0.0612
2021-02-16 2020-12-31 13F AMKOR TECHNOLOGY COM 031652100 153,612 -97,985 -38.95 2,316 -17.81 0.0766
2020-11-16 2020-09-30 13F AMKOR TECHNOLOGY COM 031652100 251,597 14,676 6.19 2,818 -3.36 0.0905
2020-08-13 2020-06-30 13F AMKOR TECHNOLOGY COM 031652100 236,921 -34,218 -12.62 2,916 38.07 0.0873
2020-05-15 2020-03-31 13F AMKOR TECHNOLOGY COM 031652100 271,139 93,626 52.74 2,112 -8.49 0.0587
2020-02-14 2019-12-31 13F AMKOR TECHNOLOGY COM 031652100 177,513 -55,884 -23.94 2,308 8.66 0.0424
2019-11-14 2019-09-30 13F AMKOR TECHNOLOGY COM 031652100 233,397 -49,443 -17.48 2,124 0.66 0.0375
2019-08-14 2019-06-30 13F AMKOR TECHNOLOGY COM 031652100 282,840 -224,159 -44.21 2,110 -51.27 0.0337
2019-05-15 2019-03-31 13F AMKOR TECHNOLOGY COM 031652100 506,999 215,222 73.76 4,330 126.23 0.0634
2019-02-14 2018-12-31 13F AMKOR TECHNOLOGY COM 031652100 291,777 291,777 1,914 0.0297
2018-11-14 2018-09-30 13F AMKOR TECHNOLOGY COM 031652100 0 -35,551 -100.00 0 -100.00
2018-08-14 2018-06-30 13F AMKOR TECHNOLOGY COM 031652100 35,551 -126,030 -78.00 305 -81.37 0.0044
2018-05-15 2018-03-31 13F AMKOR TECHNOLOGY COM 031652100 161,581 161,581 1,637 0.0229
2017-11-14 2017-09-30 13F AMKOR TECHNOLOGY COM 031652100 0 -674,787 -100.00 0 -100.00
2017-08-14 2017-06-30 13F AMKOR TECHNOLOGY COM 031652100 674,787 -331,574 -32.95 6,593 -43.48 0.0925
2017-05-15 2017-03-31 13F AMKOR TECHNOLOGY COM 031652100 1,006,361 891,625 777.11 11,664 863.97 0.1481
2017-02-14 2016-12-31 13F AMKOR TECHNOLOGY COM 031652100 114,736 114,736 0.00 1,210 0.0156
2016-05-16 2016-03-31 13F AMKOR TECHNOLOGY COM 031652100 0 -1,753,173 -100.00 0 -100.00
2016-02-16 2015-12-31 13F AMKOR TECHNOLOGY COM 031652100 1,753,173 906,603 107.09 10,659 180.43 0.1157
2015-11-16 2015-09-30 13F AMKOR TECHNOLOGY COM 031652100 846,570 846,570 0.00 3,801 0.0371
2015-02-17 2014-12-31 13F AMKOR TECHNOLOGY COM 031652100 0 -112,135 -100.00 0 -100.00
2014-11-14 2014-09-30 13F AMKOR TECHNOLOGY COM 031652100 112,135 32,595 40.98 943 6.07 0.0094
2014-08-14 2014-06-30 13F AMKOR TECHNOLOGY COM 031652100 79,540 -120,895 -60.32 889 -27.66 0.0111
2014-02-14 2013-12-31 13F AMKOR TECHNOLOGY COM 031652100 200,435 200,435 1,834.70 1,229 2,693.18 0.0293
2013-11-14 2013-09-30 13F AMKOR TECHNOLOGY COM 031652100 0 -10,360 -100.00 0 -100.00
2013-08-15 2013-06-30 13F/A-1 AMKOR TECHNOLOGY COM 031652100 10,360 10,360 44 0.0019
2013-08-14 2013-06-30 13F AMKOR TECHNOLOGY COM 031652100 10,360 44 0.0019
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.