Amkor Technology, Inc.
MX ˙ BMV ˙ US0316521006
SecurityMX:AMKR / Amkor Technology, Inc.
InstitutionAdvisor Group Holdings, Inc.
Latest Disclosed Ownership4,615 shares
Latest Disclosed Value $ 207,843
Advisor Group Holdings, Inc. reports 30.04% decrease in ownership of AMKR / Amkor Technology, Inc.

On May 15, 2026 - Advisor Group Holdings, Inc. filed a 13F-HR form disclosing ownership of 4,615 shares of Amkor Technology, Inc. (MX:AMKR) valued at $207,843 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 6,597 shares of Amkor Technology, Inc.. This represents a change in shares of -30.04% 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 4,615 -1,982 -30.04 208 -20.38 0.0002
2026-02-17 2025-12-31 13F AMKOR TECHNOLOGY COM 031652100 6,597 943 16.68 260 73.33 0.0004
2025-11-14 2025-09-30 13F AMKOR TECHNOLOGY COM 031652100 5,654 1,472 35.20 151 72.41 0.0002
2025-09-04 2025-06-30 13F/A-1 MKOR TECHNOLOGY COM 031652100 4,182 2,737 189.41 88 234.62 0.0002
2025-08-13 2025-06-30 13F MKOR TECHNOLOGY COM 031652100 3,202 1,757 75 0.0001
2025-05-12 2025-03-31 13F AMKOR TECHNOLOGY COM 031652100 1,445 -1,015 -41.26 26 -58.73 0.0001
2025-06-06 2024-12-31 13F/A-1 AMKOR TECHNOLOGY COM 031652100 2,460 -24,106 -90.74 63 -92.24 0.0001
2025-02-07 2024-12-31 13F AMKOR TECHNOLOGY COM 031652100 20,965 -5,601 637 0.0016
2024-11-13 2024-09-30 13F AMKOR TECHNOLOGY COM 031652100 26,566 8,679 48.52 813 13.57 0.0018
2024-08-13 2024-06-30 13F AMKOR TECHNOLOGY COM 031652100 17,887 2,004 12.62 716 39.65 0.0017
2024-05-10 2024-03-31 13F AMKOR TECHNOLOGY COM 031652100 15,883 -11,837 -42.70 512 -44.47 0.0011
2024-02-12 2023-12-31 13F AMKOR TECHNOLOGY COM 031652100 27,720 -11,043 -28.49 922 5.25 0.0016
2023-11-13 2023-09-30 13F AMKOR TECHNOLOGY COM 031652100 38,763 21,295 121.91 876 68.79 0.0013
2023-08-21 2023-06-30 13F/A-1 AMKOR TECHNOLOGY COM 031652100 17,468 -7,545 -30.16 519 -20.15 0.0009
2023-08-10 2023-06-30 13F AMKOR TECHNOLOGY COM 031652100 17,468 -7,545 519 0.0001
2023-05-12 2023-03-31 13F AMKOR TECHNOLOGY COM 031652100 25,013 13,684 120.79 651 138.97 0.0012
2023-02-10 2022-12-31 13F AMKOR TECHNOLOGY COM 031652100 11,329 8,122 253.26 272 403.70 0.0006
2022-11-14 2022-09-30 13F AMKOR TECHNOLOGY COM 031652100 3,207 -639 -16.61 54 -16.92 0.0001
2022-08-10 2022-06-30 13F AMKOR TECHNOLOGY COM 031652100 3,846 -460 -10.68 65 -91.79 0.0001
2022-05-04 2022-03-31 13F AMKOR TECHNOLOGY COM 031652100 4,306 -1,564 -26.64 792 442.47 0.0015
2022-02-03 2021-12-31 13F AMKOR TECHNOLOGY COM 031652100 5,870 1,258 27.28 146 26.96 0.0003
2021-11-05 2021-09-30 13F AMKOR TECHNOLOGY COM 031652100 4,612 -45 -0.97 115 3.60 0.0002
2021-08-02 2021-06-30 13F AMKOR TECHNOLOGY COM 031652100 4,657 660 16.51 111 18.09 0.0002
2021-05-13 2021-03-31 13F AMKOR TECHNOLOGY COM 031652100 3,997 1,924 92.81 94 203.23 0.0002
2021-02-10 2020-12-31 13F AMKOR TECHNOLOGY COM 031652100 2,073 358 20.87 31 63.16 0.0001
2020-11-12 2020-09-30 13F AMKOR TECHNOLOGY COM 031652100 1,715 152 9.72 19 0.00 0.0001
2020-08-14 2020-06-30 13F AMKOR TECHNOLOGY COM 031652100 1,563 1,011 183.15 19 375.00 0.0001
2020-05-18 2020-03-31 13F AMKOR TECHNOLOGY COM 031652100 552 552 4 0.0000
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.