Amkor Technology, Inc. (AMKR)
Nasdaq: AMKR · Semiconductors & Related Devices · Tempe, AZ · filing with the SEC since 1997
Grade5.3
◀ Past 6.4● Present 5.6▶ Future 3.8
Who owns Amkor Technology, Inc.
As filed with the SECHolders of 5% or more
1
John T. Kim holds 30.4% of Common Stock, par value $0.001 per share, as its SCHEDULE 13D/A filed May 5, 2026 says.
Directors and officers
18
report now, of 27 people on the record since 2006. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 1 named at left.
Holders of 5% or moreshare of the class, as filed
John T. Kim
SCHEDULE 13D/A · filed May 5, 2026 · Common Stock, par value $0.001 per share · 30.5% in Feb 17, 2026
Dimensional Fund Advisors LP
SCHEDULE 13G/A · filed Apr 9, 2026 · Common Stock · reported falling below 5%
The Vanguard Group
SCHEDULE 13G/A · filed Mar 26, 2026 · Common Stock · reported falling below 5%
What AMKR reports owning in othersstakes of 5% or more, and other ties
19 subsidiaries in 12 countries, from the list filed with the 10-K filed Feb 20, 2026.
Insider tradesForm 4
43sales
0purchases
23sales on a scheduled plan
11people selling
$507Msold, in dollars
$0bought, in dollars
Open-market trades on Form 4 from Nov 12, 2025 to Nov 12, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2026 runs to Nov 12, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window12 of 47 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Kim John T | director | 1 | $485M | 0 | 0 | $0 |
| 915 Investments, LP | 10% owner | 1 | $485M | 0 | 0 | $0 |
| Rutten Guillaume Marie Jean | President and CEO | 8 | $9.2M | 4 | 0 | $0 |
| Rogers Mark N | EVP & General Counsel | 10 | $3.9M | 9 | 0 | $0 |
| Tily Gil C. | CAO & General Counsel | 2 | $2.1M | 0 | 0 | $0 |
| Engel Kevin | President and CEO | 5 | $1.5M | 1 | 0 | $0 |
| Carolin Roger Anthony | director | 1 | $1.5M | 0 | 0 | $0 |
| Churchill Winston J | director | 3 | $1.1M | 0 | 0 | $0 |
| Alexander Douglas A | director | 4 | $900,000 | 2 | 0 | $0 |
| Mccourt Maryfrances | director | 1 | $900,000 | 0 | 0 | $0 |
| Haghighi Farshad | Executive Vice President | 1 | $800,000 | 0 | 0 | $0 |
| Faust Megan | CFO | 7 | $400,000 | 7 | 0 | $0 |