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Amkor Technology stock timeline
A year of the price with every insider trade, planned sale, earnings report and material 8-K marked
252 sessions−6.1% to $32.82
Amkor Technology (AMKR) stock fell 6% over the last 252 sessions, to $32.82. On the way it reported 0 quarters, its insiders filed 3 open-market trades and 11 Form 144 notices of planned sales, and the company filed 2 material 8-Ks. Each is marked on the price and listed with what the stock did next.
Each mark, and what followed
| Date | Kind | What | Next session | 5 sessions | 21 sessions |
|---|---|---|---|---|---|
| Oct 13, 2026 | Form 144 | Form 144: Megan Faust plans to sell $47K | −1.0% (−1.0% vs SPY) | −13.8% (−12.3% vs SPY) | — |
| Oct 2, 2026 | Form 144 | Form 144: Douglas A Alexander plans to sell $275K | +5.7% (+5.0% vs SPY) | −3.7% (−5.0% vs SPY) | −29.2% (−28.1% vs SPY) |
| Sep 8, 2026 | Form 144 | Form 144: Megan Faust plans to sell $49K | +6.0% (+6.5% vs SPY) | −1.4% (−0.1% vs SPY) | +11.1% (+9.7% vs SPY) |
| Aug 17, 2026 | Form 144 | Form 144: Mark N Rogers plans to sell $299K | +3.8% (+4.3% vs SPY) | −16.0% (−14.7% vs SPY) | −23.9% (−21.4% vs SPY) |
| Aug 11, 2026 | Form 144 | Form 144: Megan Faust plans to sell $54K | +2.7% (+3.0% vs SPY) | +14.8% (+14.8% vs SPY) | −2.8% (−1.4% vs SPY) |
| Aug 7, 2026 | Form 144 | Form 144: Douglas A Alexander plans to sell $279K | +2.0% (+1.4% vs SPY) | +6.4% (+5.2% vs SPY) | −12.4% (−12.6% vs SPY) |
| Aug 6, 2026 | Form 144 | Form 144: Guillaume Rutten plans to sell $1.4M | +0.6% (+0.7% vs SPY) | +3.2% (+2.8% vs SPY) | −13.6% (−14.0% vs SPY) |
| Aug 6, 2026 | Insider sale | Rutten Guillaume Marie Jean sold $1.4M | +0.6% (+0.7% vs SPY) | +3.2% (+2.8% vs SPY) | −13.6% (−14.0% vs SPY) |
| Aug 5, 2026 | Form 144 | Form 144: Guillaume Rutten plans to sell $1.4M | −3.7% (−3.5% vs SPY) | −2.8% (−2.7% vs SPY) | −16.8% (−16.0% vs SPY) |
| Aug 5, 2026 | Insider sale | Rutten Guillaume Marie Jean sold $1.4M | −3.7% (−3.5% vs SPY) | −2.8% (−2.7% vs SPY) | −16.8% (−16.0% vs SPY) |
| Jul 30, 2026 | Form 144 | Form 144: Kevin K Engel plans to sell $151K | +12.2% (+10.5% vs SPY) | +23.2% (+17.8% vs SPY) | +19.1% (+13.6% vs SPY) |
| Jul 30, 2026 | Insider sale | Engel Kevin K. sold $151K | +12.2% (+10.5% vs SPY) | +23.2% (+17.8% vs SPY) | +19.1% (+13.6% vs SPY) |
| Jul 16, 2026 | Form 144 | Form 144: Mark N Rogers plans to sell $326K | −7.1% (−6.5% vs SPY) | −1.0% (0.0% vs SPY) | −15.8% (−18.8% vs SPY) |
| Jul 14, 2026 | Form 144 | Form 144: Megan Faust plans to sell $70K | +6.1% (+5.7% vs SPY) | −5.4% (−4.5% vs SPY) | −19.6% (−22.4% vs SPY) |
| May 5, 2026 | 8-K | Material definitive agreement | +0.7% (−0.7% vs SPY) | −4.4% (−6.3% vs SPY) | −3.7% (−8.2% vs SPY) |
| Feb 2, 2026 | 8-K | Directors and officers: departures, appointments, pay | −4.2% (−3.3% vs SPY) | +8.6% (+8.8% vs SPY) | −5.2% (−3.7% vs SPY) |
Insiders’ record here
In the year on the chart, Amkor Technology's insiders reported 0 open-market buys ($0) and 3 sales ($2.9M). Of the 1 old enough to score, 1 were followed by the stock doing what the trade implied over the next 63 sessions (beating SPY after a buy, lagging it after a sale); the median excess return after a buy was — and after a sale −16.7%.
Across the whole universe (19,782 scored trades), insider buys beat the market 46% of the time and sales were followed by a lagging stock 61% of the time; buys of $1M or more 39%. Every pattern →
What this kind of 8-K usually did
| Item | 8-Ks | Next session, median | Up next session | 21 sessions, median | Typical size |
|---|---|---|---|---|---|
| 5.02 Directors and officers: departures, appointments, pay | 39,174 | −0.1% | 48% | +0.7% | ±1.4% |
| 1.01 Material definitive agreement | 23,525 | 0.0% | 51% | +1.0% | ±1.4% |
| 2.03 New debt or off-balance-sheet obligation | 13,268 | 0.0% | 50% | +1.2% | ±1.3% |
Across every company in the move-odds universe, measured from the close before the filing. Every 8-K item ranked →
Amkor Technology: every quarter → Live insider trades →
Prices are daily closes; filings and trades are as filed with the SEC (Form 4 within two business days of the trade, 8-K within four of the event). Moves after a mark are the stock's close-to-close change and the same for SPY; they describe the record, not what the next one will do. Not investment advice.