---
schema_version: "secwatch.filing_event.v1"
accession: "0001047127-21-000036"
form_type: "8-K/A"
ticker: "AMKR"
cik: "0001047127"
company_name: "AMKOR TECHNOLOGY, INC."
filed_at: "2021-09-28T23:59:59+00:00"
generated_at: "2026-06-29T00:52:47.873864+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# Amkor finalizes retirement terms for EVP John C. Stone, effective March 31, 2022

## Summary
- John C. Stone to retire on March 31, 2022; separation agreement finalized September 27, 2021.
- Will receive continued base salary for 15 months post-retirement and pro rata 2022 bonus under Bonus Plan.
- Outplacement services for up to 6 months and COBRA subsidy for 15 months provided.
- Vested/unvested stock options and restricted stock treated per existing award agreements.
- Agreement includes general release, confidentiality, non-competition, and non-solicitation covenants.

## SEC filing metadata
- accession: 0001047127-21-000036
- form_type: 8-K/A
- ticker: AMKR
- cik: 0001047127
- company_name: AMKOR TECHNOLOGY, INC.
- filed_at: 2021-09-28T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1047127/000104712721000036/0001047127-21-000036-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1047127/000104712721000036/amkr-20210914.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001047127-21-000036
- JSON: https://secwatch.observer/filing/0001047127-21-000036.json
- Plain text: https://secwatch.observer/filing/0001047127-21-000036.txt

## Key facts
- Executive change
  John C. Stone departed as other_named_officer at AMKOR TECHNOLOGY, INC..
  - Action: retire
  source text: John C. Stone informed the Company that he intends to retire on March 31, 2022
  evidence_url: https://www.sec.gov/Archives/edgar/data/1047127/000104712721000036/0001047127-21-000036-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.