SEC Form 4
Amkor Technology Inc (AMKR) insider trading
In the 12 months to Oct 23, 2026, 12 AMKR insiders reported open-market sales of $992.2M across 40 filings; no open-market purchases were filed.
Latest filing · Last 12 months · Source: SEC EDGAR · How we count
- Open-market sales
- $992.2M
- 40 filings · 12 insiders
- Open-market purchases
- $0
- 0 filings
- Pre-arranged sales (10b5-1)
- 21 of 40
- $6.3M of $992.2M sold (1%)
Who traded AMKR, and when
- Sale
- Sale, pre-arranged (10b5-1)
AMKR daily close from Oct 23, 2025 to Oct 23, 2026, between $30.19 and $93.55, last $39.43. 40 sale and 0 purchase filings by 12 insiders, marked at their filing dates. 915 Investments, LP, Other: sold $484.9M across 1 filing, first filed Feb 17, 2026, last Feb 17, 2026. John T. Kim, 10% owner: sold $484.9M across 1 filing, first filed Feb 17, 2026, last Feb 17, 2026. Guillaume Marie Jean Rutten, President and CEO → Director: sold $9.2M across 7 filings, first filed Nov 19, 2025, last Aug 7, 2026. Mark N. Rogers, EVP & General Counsel: sold $3.9M across 10 filings, first filed Nov 19, 2025, last Aug 19, 2026. Gil C. Tily, Director: sold $2.1M across 2 filings, first filed Dec 16, 2025, last May 13, 2026. Roger Anthony Carolin, Director: sold $1.5M across 1 filing, first filed May 7, 2026, last May 7, 2026. 6 others: sold $5.7M across 18 filings, first filed Dec 16, 2025, last Oct 15, 2026.
Largest mark · tap a row for others
915 Investments, LP · Other
Sale $484,900,000
10,000,000 shares at $48.49 avg
Filed Feb 17, 2026 · traded Feb 12
Close on filing date $46.84
915 Investments, LP · Other
Other
$484.9M soldJohn T. Kim · 10% owner
10% owner
$484.9M soldGuillaume Marie Jean Rutten · President and CEO → Director
President and CEO → Director
$9.2M soldMark N. Rogers · EVP & General Counsel
EVP & General Counsel
$3.9M soldGil C. Tily · Director
Director
$2.1M soldRoger Anthony Carolin · Director
Director
$1.5M sold6 others
Combined, one mark per week
$5.7M soldHas Amkor Technology Inc's CEO sold stock?
Yes. Kevin K. Engel (CEO) sold 21,037 shares ($1.0M) between Feb 2026 and Jul 2026. Guillaume Marie Jean Rutten (CEO) sold 20,000 shares ($764.8K) between Nov 2025 and Dec 2025, all under a pre-arranged 10b5-1 plan.
Open-market trades
40 filings in the last 12 months| Insider | Role | Sold | Bought | Filings | Pre-arranged (10b5-1) | Last filed |
|---|---|---|---|---|---|---|
| 915 Investments, LP | Other | $484.9M | — | 1 | — | |
| John T. Kim | 10% owner | $484.9M | — | 1 | — | |
| Guillaume Marie Jean Rutten | President and CEO → Director | $9.2M | — | 7 | 19% of sales | |
| Mark N. Rogers | EVP & General Counsel | $3.9M | — | 10 | 92% of sales | |
| Gil C. Tily | Director | $2.1M | — | 2 | — | |
| Roger Anthony Carolin | Director | $1.5M | — | 1 | — | |
| Kevin Engel | Executive Vice President → President and CEO | $1.5M | — | 4 | — | |
| Winston J. Churchill | Director | $1.1M | — | 3 | — | |
| Douglas A. Alexander | Director | $937.0K | — | 3 | 59% of sales | |
| MaryFrances McCourt | Director | $920.4K | — | 1 | — | |
| Farshad Haghighi | Executive Vice President | $789.0K | — | 1 | — | |
| Megan Faust | CFO | $355.2K | — | 6 | 100% of sales |
| Filed | Insider | Type | Shares | Avg price | Value | Held after | Source |
|---|---|---|---|---|---|---|---|
traded | Megan Faust CFO | SalePre-arranged (10b5-1) | 1,000 | $46.92 | $46.9K | 133,105 | |
traded | Douglas A. Alexander Director | SalePre-arranged (10b5-1) | 5,000 | $55.00 | $275.0K | 29,109 | |
traded | Megan Faust CFO | SalePre-arranged (10b5-1) | 1,000 | $49.05 | $49.1K | 134,105 | |
traded | Mark N. Rogers EVP & General Counsel | SalePre-arranged (10b5-1) | 5,000 | $59.78 | $298.9K | 38,904 | |
traded | Megan Faust CFO | SalePre-arranged (10b5-1) | 1,000 | $54.45 | $54.5K | 135,105 | |
traded | Douglas A. Alexander Director | SalePre-arranged (10b5-1) | 5,000 | $55.81 | $279.1K | 29,109 | |
traded | Guillaume Marie Jean Rutten Director | Sale | 50,000 | $54.93 | $2.7M | 461,732 | |
traded | Kevin K. Engel President and CEO | Sale | 3,221 | $47.00 | $151.4K | 9,666 | |
traded | Mark N. Rogers EVP & General Counsel | SalePre-arranged (10b5-1) | 5,000 | $65.12 | $325.6K | 38,904 | |
traded | Megan Faust CFO | SalePre-arranged (10b5-1) | 1,000 | $69.91 | $69.9K | 136,105 | |
traded | Mark N. Rogers EVP & General Counsel | SalePre-arranged (10b5-1) | 5,000 | $86.21 | $431.0K | 38,904 | |
traded | Winston J. Churchill Director | Sale | 5,000 | $78.20 | $391.0K | 28,781 | |
traded | Megan Faust CFO | SalePre-arranged (10b5-1) | 1,000 | $70.30 | $70.3K | 132,138 | |
traded | Megan Faust CFO | SalePre-arranged (10b5-1) | 1,000 | $64.60 | $64.6K | 133,138 | |
traded | Mark N. Rogers EVP & General Counsel | SalePre-arranged (10b5-1) | 5,000 | $71.63 | $358.2K | 38,904 | |
traded | Gil C. Tily Director | Sale | 15,000 | $77.30 | $1.2M | 108,806 | |
traded | Guillaume Marie Jean Rutten Director | Sale | 50,000 | $74.28 | $3.7M | 502,558 | |
traded | Douglas A. Alexander Director | Sale | 5,000 | $76.58 | $382.9K | 29,109 | |
traded | Winston J. Churchill Director | Sale | 7,000 | $76.45 | $535.2K | 18,888 | |
traded | Roger Anthony Carolin Director | Sale | 20,000 | $76.24 | $1.5M | 94,409 | |
traded | Mark N. Rogers EVP & General Counsel | Sale | 5,000 | $59.43 | $297.2K | 38,904 | |
traded | Mark N. Rogers EVP & General Counsel | SalePre-arranged (10b5-1) | 5,000 | $44.54 | $222.7K | 38,904 | |
traded | Farshad Haghighi Executive Vice President | Sale | 15,624 | $50.50 | $789.0K | 8,354 | |
traded | Guillaume Marie Jean Rutten Director | Sale | 20,000 | $48.80 | $976.0K | 543,866 | |
traded | Kevin K. Engel President and CEO | Sale | 12,500 | $48.75 | $609.4K | 2,953 | |
traded | Mark N. Rogers EVP & General Counsel | SalePre-arranged (10b5-1) | 5,000 | $46.92 | $234.6K | 24,922 | |
traded | Kevin K. Engel President and CEO | Sale | 5,316 | $46.03 | $244.7K | 786 | |
traded | Guillaume Marie Jean Rutten Director | SalePre-arranged (10b5-1) | 10,000 | $45.89 | $458.9K | 339,311 | |
traded | John T. Kim 10% owner | Sale | 10,000,000 | $48.49 | $484.9M | 29,594,980 | |
traded | 915 Investments, LP Other | Sale | 10,000,000 | $48.49 | $484.9M | 29,594,980 | |
traded | Mark N. Rogers EVP & General Counsel | SalePre-arranged (10b5-1) | 5,000 | $49.28 | $246.4K | 23,862 | |
traded | Guillaume Marie Jean Rutten Director | SalePre-arranged (10b5-1) | 10,000 | $53.14 | $531.4K | 335,391 | |
traded | Mark N. Rogers EVP & General Counsel | SalePre-arranged (10b5-1) | 20,000 | $42.95 | $859.0K | 23,862 | |
traded | Guillaume Marie Jean Rutten President and CEO | SalePre-arranged (10b5-1) | 10,000 | $44.80 | $448.0K | 336,699 | |
traded | Winston J. Churchill Director | Sale | 5,000 | $44.29 | $221.5K | 25,888 | |
traded | Gil C. Tily Director | Sale | 20,000 | $46.44 | $928.8K | 123,806 | |
traded | Kevin Engel Executive Vice President | Sale | 11,000 | $46.21 | $508.3K | 349 | |
traded | MaryFrances McCourt Director | Sale | 20,000 | $46.02 | $920.4K | 55,918 | |
traded | Mark N. Rogers EVP & General Counsel | SalePre-arranged (10b5-1) | 20,000 | $31.69 | $633.8K | 23,862 | |
traded | Guillaume Marie Jean Rutten President and CEO | SalePre-arranged (10b5-1) | 10,000 | $31.68 | $316.8K | 346,699 |
GET /stocks/filings/vX/form-4?tickers=AMKR&filing_date.gte=2025-10-23&sort=filing_date.desc&limit=500{
"status": "OK",
"results": [
{
"tickers": [
"AMKR"
],
"issuer_cik": "0001047127",
"owner_cik": "0001684564",
"accession_number": "0001684564-26-000003",
"form_type": "4",
"filing_date": "2026-10-15",
"period_of_report": "2026-10-13",
"issuer_name": "AMKOR TECHNOLOGY, INC.",
"issuer_trading_symbol": "AMKR",
"owner_name": "Faust Megan",
"is_director": false,
"is_officer": true,
"is_ten_percent_owner": false,
"is_other": false,
"officer_title": "CFO",
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": true,
"transaction_date": "2026-10-13",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 1000,
"transaction_price_per_share": 46.92,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 133105,
"transaction_value": 46920,
"not_subject_to_section_16": false,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F1",
"description": "1. The sale reported in the Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 17, 2026."
}
]
},
{
"tickers": [
"AMKR"
],
"issuer_cik": "0001047127",
"owner_cik": "0001195858",
"accession_number": "0001628280-26-065246",
"form_type": "4",
"filing_date": "2026-10-06",
"period_of_report": "2026-10-02",
"issuer_name": "AMKOR TECHNOLOGY, INC.",
"issuer_trading_symbol": "AMKR",
"owner_name": "ALEXANDER DOUGLAS A",
"is_director": true,
"is_officer": false,
"is_ten_percent_owner": false,
"is_other": false,
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": true,
"transaction_date": "2026-10-02",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 5000,
"transaction_price_per_share": 55,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 29109,
"transaction_value": 275000,
"not_subject_to_section_16": false,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F1",
"description": "The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 8, 2026."
}
]
}
]
}
// trimmed to 2 resultsThe response includes every Form 4 record; this page keeps open-market purchases and sales on common stock and removes duplicate joint-filer rows.
Other insider activity (not market trades) · 149 records
- Option exercises67 records
- Tax withholding40 records
- Grants and awards12 records
- Gifts30 records
Reported on Form 4 but not purchases or sales in the market, so not counted in the totals above.
Build this yourself
This page joins two Massive endpoints: Form 4 filings and daily prices. Ask an agent to watch for new filings:
Using the Massive API (massive.com/docs/llms.txt), check Form 4 filings for AMKR every day with transaction_code=P and tell me when an insider files an open-market purchase, with their role, shares, price and the filing link.
How to read this page
- Open-market purchase or sale
- A buy or sell of the company's stock at market price. Grants, option exercises, shares withheld for tax, gifts and employee stock plan purchases are listed separately and not counted.
- Pre-arranged (10b5-1)
- The insider marked the filing as made under a trading plan set up in advance (SEC Rule 10b5-1). The mark covers the whole filing, and an unmarked filing may still be under a plan.
- Role
- The title on each filing. Someone whose title changed shows more than one.
- Filing date
- Insiders have two business days to report a trade. Totals and the chart use the filing date, when the trade became public.