Amkor Technology, Inc. insiders sold $992M in the past 12 months. How much of their stake is that?

Board members representing outside shareholders, reported separately: Winston Churchill. Details

Outside holder, reported separately: Agnes Kim (files as neither an officer nor a director, not part of management). No open-market sales reported in the period. Latest filing

Outside holder, reported separately: Sujoda Management, LLC (files as neither an officer nor a director, not part of management). No open-market sales reported in the period. Latest filing

Outside holder, reported separately: 2024 Grantor Retained Annuity Trust of James J. Kim dtd. 8/5/2024 (files as neither an officer nor a director, not part of management). No open-market sales reported in the period. Latest filing

Outside holder, reported separately: 2024 Grantor Retained Annuity Trust of Susan Y. Kim dtd. 8/5/2024 (files as neither an officer nor a director, not part of management). No open-market sales reported in the period. Latest filing

Outside holder, reported separately: Kim John (files as neither an officer nor a director, not part of management). No open-market sales reported in the period. Latest filing

Outside holder, reported separately: 2024 Grantor Retained Annuity Trust of Agnes C. Kim dtd. 8/5/2024 (files as neither an officer nor a director, not part of management). No open-market sales reported in the period. Latest filing

Outside holder, reported separately: 2023 Grantor Retained Annuity Trust of Susan Y. Kim Dated 9/15/2023 (files as neither an officer nor a director, not part of management). No open-market sales reported in the period. Latest filing

Outside holder, reported separately: Kim John (files as neither an officer nor a director, not part of management). No open-market sales reported in the period. Latest filing

Outside holder, reported separately: 2023 Grantor Retained Annuity Trust of Agnes C. Kim Dated 4/26/2023 (files as neither an officer nor a director, not part of management). No open-market sales reported in the period. Latest filing

Outside holder, reported separately: 2023 Grantor Retained Annuity Trust of James J. Kim Dated 4/26/2023 (files as neither an officer nor a director, not part of management). No open-market sales reported in the period. Latest filing

Vested shares across all share classes, held directly and through trusts, LLCs and family members, as reported on SEC Forms 3, 4 and 5. Unvested awards and options are never counted as owned shares.

Holdings and share of stake for Amkor Technology, Inc. are being verified, so no balances, unit counts or percentages are shown. Sales, proceeds, plan and tax status, titles and dates come straight from individual filings.

Officer and director open-market sales: $992M across 20,400,661 shares. Plan status and stated purpose are separate questions, and a sale can have both.

Sales by month

Directors whose reported holdings sit mostly in an investment fund or a corporate shareholder they represent, not in their own name, with beneficial ownership disclaimed except for their own financial interest. Listed and sourced here; not part of the management totals or the answer line. Shares a fund hands to its own investors are distributions, not sales.

More than usual: about 6x the 5-year average. 11 insiders sold; the average is 6 a year.

Open-market sales (Form 4 code S) by people who were officers or directors, in split-adjusted shares. Earlier years include people who have since left. A sale that an outside holder also reports (a family trust, a fund) is counted with outside holders in every year. Shares, not dollars, are compared, so a change in the stock price doesn't look like a change in selling. Years the filings don't fully cover are shown but left out of the average.

All 1,436 Forms 3, 4 and 5 on record for Amkor Technology, Inc. (SEC CIK 1047127), filed from Dec 11, 1998 to Oct 15, 2026; 142 of them were filed in the 12 months this page covers, retrieved from SEC EDGAR on Oct 16, 2026. Prices are the ones reported in each filing, often weighted averages. 2 older filings exist only on paper and could not be read.

Holdings. Each holding line (a share class plus an owner, such as a trust or LLC) carries its last reported balance forward. Entities first reported during the period start at zero, so transfers between an insider's own trusts don't count as selling. Lines not reported for three years or more are listed separately and left out of totals.

Sales. A sale counts as under a 10b5-1 plan if its footnote cites one or the filing's Rule 10b5-1 box is checked, and as tax-related if its footnote cites tax obligations or sell-to-cover. Shares withheld by the company for taxes are listed separately. Sales with neither attribute are labeled "no plan disclosed".

Full methodology