Amkor Technology, Inc.
MX ˙ BMV ˙ US0316521006
SecurityMX:AMKR / Amkor Technology, Inc.
InstitutionSterling Capital Management LLC
Latest Disclosed Ownership12,907 shares
Latest Disclosed Value $ 581,202
Sterling Capital Management LLC reports 37.14% decrease in ownership of AMKR / Amkor Technology, Inc.

On April 22, 2026 - Sterling Capital Management LLC filed a 13F-HR form disclosing ownership of 12,907 shares of Amkor Technology, Inc. (MX:AMKR) valued at $581,202 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 20,532 shares of Amkor Technology, Inc.. This represents a change in shares of -37.14% 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)
2026-04-22 2026-03-31 13F AMKOR TECHNOLOGY COM 031652100 12,907 -7,625 -37.14 581 -28.27 0.0080
2026-02-13 2025-12-31 13F AMKOR TECHNOLOGY COM 031652100 20,532 -305 -1.46 811 37.06 0.0132
2025-11-12 2025-09-30 13F AMKOR TECHNOLOGY COM 031652100 20,837 -590 -2.75 592 31.63 0.0087
2025-08-08 2025-06-30 13F/A-1 AMKOR TECHNOLOGY COM 031652100 21,427 1,346 6.70 450 24.03 0.0064
2025-08-06 2025-06-30 13F AMKOR TECHNOLOGY COM 031652100 21,427 1,346 450 0.0064
2025-05-13 2025-03-31 13F AMKOR TECHNOLOGY COM 031652100 20,081 -1,614 -7.44 363 -35.01 0.0056
2025-02-13 2024-12-31 13F AMKOR TECHNOLOGY COM 031652100 21,695 2,460 12.79 557 -5.27 0.0076
2024-11-12 2024-09-30 13F AMKOR TECHNOLOGY COM 031652100 19,235 -114,973 -85.67 589 -51.84 0.0076
2019-11-14 2019-09-30 13F AMKOR TECHNOLOGY COM 031652100 134,208 26,290 24.36 1,221 51.68 0.0116
2019-08-14 2019-06-30 13F AMKOR TECHNOLOGY COM 031652100 107,918 0 0.00 805 -12.69 0.0078
2019-05-15 2019-03-31 13F AMKOR TECHNOLOGY COM 031652100 107,918 107,918 922 0.0091
2018-11-01 2018-09-30 13F AMKOR TECHNOLOGY COM 031652100 0 -122,227 -100.00 0 -100.00
2018-08-14 2018-06-30 13F AMKOR TECHNOLOGY COM 031652100 122,227 0 0.00 1,050 -15.19 0.0098
2018-05-15 2018-03-31 13F AMKOR TECHNOLOGY COM 031652100 122,227 0 0.00 1,238 0.81 0.0117
2018-02-15 2017-12-31 13F AMKOR TECHNOLOGY COM 031652100 122,227 0 0.00 1,228 -4.73 0.0111
2017-11-15 2017-09-30 13F AMKOR TECHNOLOGY COM 031652100 122,227 -1,016 -0.82 1,289 7.06 0.0121
2017-08-15 2017-06-30 13F AMKOR TECHNOLOGY COM 031652100 123,243 12,246 11.03 1,204 -6.38 0.0116
2017-05-15 2017-03-31 13F AMKOR TECHNOLOGY COM 031652100 110,997 0 0.00 1,286 9.82 0.0121
2017-02-14 2016-12-31 13F AMKOR TECHNOLOGY COM 031652100 110,997 4,802 4.52 1,171 13.47 0.0106
2016-11-14 2016-09-30 13F AMKOR TECHNOLOGY COM 031652100 106,195 -204 -0.19 1,032 68.63 0.0095
2016-08-19 2016-06-30 13F AMKOR TECHNOLOGY COM 031652100 106,399 106,399 0.00 612 0.0056
2015-08-17 2015-06-30 13F AMKOR TECHNOLOGY COM 031652100 0 0 0 0.0000
2015-05-19 2015-03-31 13F AMKOR TECHNOLOGY COM 031652100 0 -163,151 -100.00 0 -100.00
2015-05-22 2014-12-31 13F/A-1 AMKOR TECHNOLOGY COM 031652100 163,151 -4,537 -2.71 1,158 -17.93 0.0101
2015-02-13 2014-12-31 13F AMKOR TECHNOLOGY COM 031652100 326,302 2,317
2014-11-14 2014-09-30 13F AMKOR TECHNOLOGY COM 031652100 167,688 6,951 4.32 1,411 -21.48 0.0171
2014-08-15 2014-06-30 13F AMKOR TECHNOLOGY COM 031652100 160,737 5,707 3.68 1,797 68.89 0.0155
2014-05-16 2014-03-31 13F AMKOR TECHNOLOGY COM 031652100 155,030 155,030 1,064 0.0091
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.