Amkor Technology
AMKR · NASDAQ
Who owns AMKR
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 57.1% of AMKR’s shares.
- 915 Investments, L.P.11.9%
- Kim John T9.4%
- Sujochil, L.P.7.8%
- Kim Capital Partners - KCP, LLC6.7%
- Next 6 largest institutions21.3%
- All other shareholders42.9%
| Holder | Shares | % of shares |
|---|---|---|
| 915 Investments, L.P. | 29.59M | 11.91% |
| Kim John T | 23.29M | 9.37% |
| Sujochil, L.P. | 19.48M | 7.84% |
| Kim Capital Partners - KCP, LLC | 16.71M | 6.73% |
| BlackRock Institutional Trust Company, N.A. | 10.78M | 4.34% |
| Kim (James Jungsup) | 10.75M | 4.33% |
| Vanguard Portfolio Management, LLC | 9.71M | 3.91% |
| Dimensional Fund Advisors, L.P. | 8.06M | 3.25% |
| Kim (Susan Y) | 6.85M | 2.76% |
| Vanguard Capital Management, LLC | 6.70M | 2.70% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| Vanguard Total Stock Market Index Fund | 5.13M | 2.07% |
| iShares Core S&P Mid-Cap ETF | 3.99M | 1.61% |
| Vanguard Small-Cap Index Fund | 3.70M | 1.49% |
| Vanguard Small-Cap Value Index Fund | 2.35M | 0.95% |
| Vanguard Information Technology Index Fund | 2.00M | 0.81% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders sold $12.93M (22 trades) of AMKR on the open market, with no buys.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Faust Megan | Sale | 1.00K | $46.92K |
| ALEXANDER DOUGLAS A | Option exercise | 5.00K | — |
| ALEXANDER DOUGLAS A | Sale | 5.00K | $275.00K |
| ALEXANDER DOUGLAS A | Option exercise | 5.00K | $42.55K |
| KIM SUSAN Y | Award | 4 | — |
| WATSON DAVID N | Award | 4 | — |
| Tily Gil C. | Award | 4 | — |
| Rutten Guillaume Marie Jean | Award | 4 | — |
| Morse Robert Randolph | Award | 4 | — |
| Morse Robert Randolph | Award | 15 | — |
Congressional trades
Disclosed by members of Congress over the last 12 months
| Member | Type | Amount | Traded |
|---|---|---|---|
| Markwayne MullinSenator | Purchase | $15K–$50K | Feb 4, 2026 |
| Markwayne MullinSenator | Purchase | $15K–$50K | Jan 5, 2026 |
Short interest
Settled Sep 30, 2026
- Shares short
- 10.66M
- Days to cover
- 3.07
- % of shares outstanding
- 4.29%
- Average daily volume
- 3.47M
- Change since last report
- +7.7%
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