Amkor Technology, Inc.
US ˙ NasdaqGS ˙ US0316521006

SecurityAMKR / Amkor Technology, Inc.
InstitutionCreative Planning
Latest Disclosed Ownership107,529 shares
Latest Disclosed Value $ 4,842,021
Creative Planning reports 26.10% increase in ownership of AMKR / Amkor Technology, Inc.

On May 12, 2026 - Creative Planning filed a 13F-HR form disclosing ownership of 107,529 shares of Amkor Technology, Inc. (US:AMKR) valued at $4,842,031 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 85,270 shares of Amkor Technology, Inc.. This represents a change in shares of 26.10% during the quarter. The current value of the position is $8,086,181 USD.

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)
2026-05-12 2026-03-31 13F AMKOR TECHNOLOGY COM 031652100 107,529 22,259 26.10 4,842 43.85 0.0032
2026-02-17 2025-12-31 13F AMKOR TECHNOLOGY COM 031652100 85,270 33,114 63.49 3,366 127.28 0.0024
2025-11-14 2025-09-30 13F AMKOR TECHNOLOGY COM 031652100 52,156 19,139 57.97 1,481 113.71 0.0011
2025-08-08 2025-06-30 13F AMKOR TECHNOLOGY COM 031652100 33,017 -242 -0.73 693 15.50 0.0006
2025-05-15 2025-03-31 13F AMKOR TECHNOLOGY COM 031652100 33,259 6,672 25.09 601 -12.15 0.0006
2025-02-14 2024-12-31 13F AMKOR TECHNOLOGY COM 031652100 26,587 -2,295 -7.95 683 -21.94 0.0007
2024-10-11 2024-09-30 13F AMKOR TECHNOLOGY COM 031652100 28,882 -206 -0.71 875 -24.83 0.0009
2024-08-15 2024-06-30 13F AMKOR TECHNOLOGY COM 031652100 29,088 12,658 77.04 1,164 120.04 0.0012
2024-05-13 2024-03-31 13F AMKOR TECHNOLOGY COM 031652100 16,430 4,118 33.45 530 29.34 0.0006
2024-02-14 2023-12-31 13F AMKOR TECHNOLOGY COM 031652100 12,312 12,312 410 0.0008
2023-11-16 2023-09-30 13F AMKOR TECHNOLOGY COM 031652100 0 -8,711 -100.00 0 -100.00
2023-07-21 2023-06-30 13F AMKOR TECHNOLOGY COM 031652100 8,711 354 4.24 259 19.35 0.0003
2023-05-15 2023-03-31 13F AMKOR TECHNOLOGY COM 031652100 8,357 8,357 217 0.0003
2017-10-17 2017-09-30 13F AMKOR TECHNOLOGY COM 031652100 0 -990 -100.00 0 -100.00
2017-07-12 2017-06-30 13F AMKOR TECHNOLOGY COM 031652100 990 990 10 0.0001
2017-01-09 2016-12-31 13F AMKOR TECHNOLOGY COM 031652100 0 -110 -100.00 0 -100.00
2016-10-12 2016-09-30 13F AMKOR TECHNOLOGY COM 031652100 110 110 -95.60 1 -90.91 0.0000
2016-07-12 2016-06-30 13F AMKOR TECHNOLOGY COM 031652100 0 -2,500 -100.00 0 -100.00
2016-04-08 2016-03-31 13F AMKOR TECHNOLOGY COM 031652100 2,500 -750 -23.08 15 -25.00 0.0001
2016-01-11 2015-12-31 13F AMKOR TECHNOLOGY COM 031652100 3,250 750 30.00 20 81.82 0.0002
2015-10-09 2015-09-30 13F AMKOR TECHNOLOGY COM 031652100 2,500 2,500 0.00 11 -26.67 0.0001
2015-07-09 2015-06-30 13F AMKOR TECHNOLOGY COM 031652100 0 -3,500 -100.00 0 -100.00
2015-04-13 2015-03-31 13F AMKOR TECHNOLOGY COM 031652100 3,500 3,500 253.54 31 210.00 0.0003
2015-01-29 2014-12-31 13F AMKOR TECHNOLOGY COM 031652100 0 -2,500 -100.00 0 -100.00
2014-10-10 2014-09-30 13F AMKOR TECHNOLOGY COM 031652100 2,500 0 0.00 21 -25.00 0.0002
2014-08-20 2014-06-30 13F AMKOR TECHNOLOGY COM 031652100 2,500 2,200 733.33 28 1,300.00 0.0004
2014-01-06 2013-12-31 13F AMKOR TECHNOLOGY COM 031652100 300 0 0.00 2 100.00 0.0000
2013-10-10 2013-09-30 13F AMKOR TECHNOLOGY COM 031652100 300 300 1 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.