Amkor Technology, Inc.
MX ˙ BMV ˙ US0316521006
SecurityMX:AMKR / Amkor Technology, Inc.
InstitutionBaird Financial Group, Inc.
Latest Disclosed Ownership403,777 shares
Latest Disclosed Value $ 18,182,078
Baird Financial Group, Inc. reports 4.68% increase in ownership of AMKR / Amkor Technology, Inc.

On May 14, 2026 - Baird Financial Group, Inc. filed a 13F-HR form disclosing ownership of 403,777 shares of Amkor Technology, Inc. (MX:AMKR) valued at $18,182,078 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 385,715 shares of Amkor Technology, Inc.. This represents a change in shares of 4.68% 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)
2026-05-14 2026-03-31 13F AMKOR TECHNOLOGY COM 031652100 403,777 18,062 4.68 18,182 19.40 0.0153
2026-02-13 2025-12-31 13F AMKOR TECHNOLOGY INC COM COMMON 031652100 385,715 -7,507 -1.91 15,228 36.37 0.0237
2025-11-13 2025-09-30 13F AMKOR TECHNOLOGY COMMON 031652100 393,222 -6,418 -1.61 11,168 33.13 0.0180
2025-08-13 2025-06-30 13F AMKOR TECHNOLOGY INC COM COMMON 031652100 399,640 3,546 0.90 8,388 17.27 0.0147
2025-05-15 2025-03-31 13F AMKOR TECHNOLOGY INC COM COMMON 031652100 396,094 8,512 2.20 7,153 -28.15 0.0138
2025-02-14 2024-12-31 13F AMKOR TECHNOLOGY COMMON 031652100 387,582 15,550 4.18 9,957 -12.54 0.0190
2024-11-14 2024-09-30 13F AMKOR TECHNOLOGY COMMON 031652100 372,032 27,819 8.08 11,384 -17.36 0.0221
2024-08-14 2024-06-30 13F AMKOR TECHNOLOGY COMMON 031652100 344,213 28,874 9.16 13,775 35.50 0.0286
2024-05-14 2024-03-31 13F AMKOR TECHNOLOGY COMMON 031652100 315,339 33,550 11.91 10,167 8.44 0.0213
2024-02-14 2023-12-31 13F AMKOR TECHNOLOGY COMMON 031652100 281,789 33,172 13.34 9,375 66.87 0.0214
2023-11-13 2023-09-30 13F AMKOR TECHNOLOGY COMMON 031652100 248,617 20,540 9.01 5,619 -17.20 0.0153
2023-08-11 2023-06-30 13F AMKOR TECHNOLOGY COMMON 031652100 228,077 212,139 1,331.03 6,785 1,538.89 0.0179
2023-05-15 2023-03-31 13F AMKOR TECHNOLOGY COMMON 031652100 15,938 204 1.30 415 0.0010
2023-02-13 2022-12-31 13F AMKOR TECHNOLOGY COMMON 031652100 15,734 -107 -0.68 0 -100.00 0.0010
2022-11-15 2022-09-30 13F AMKOR TECHNOLOGY COMMON 031652100 15,841 -2,876 -15.37 270 -15.09 0.0008
2022-08-08 2022-06-30 13F AMKOR TECHNOLOGY COMMON 031652100 18,717 -4,415 -19.09 318 -36.78 0.0009
2022-05-13 2022-03-31 13F AMKOR TECHNOLOGY COMMON 031652100 23,132 3,485 17.74 503 3.29 0.0012
2022-02-09 2021-12-31 13F AMKOR TECHNOLOGY INC COM COMMON 031652100 19,647 10,780 121.57 487 120.36 0.0011
2021-11-12 2021-09-30 13F AMKOR TECHNOLOGY COMMON 031652100 8,867 -91 -1.02 221 4.25 0.0006
2021-08-11 2021-06-30 13F AMKOR TECHNOLOGY COMMON 031652100 8,958 -5,778 -39.21 212 -39.26 0.0006
2021-05-13 2021-03-31 13F AMKOR TECHNOLOGY COMMON 031652100 14,736 14,736 349 0.0010
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.