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AMKOR TECHNOLOGY, INC.

AMKR · Semiconductors & Related Devices · 247.9M shares · +1%/yr ↑ shares · EDGAR filings ↗
Net buyback after stock comp: $73M (gross $81M, SBC $8M)

Reference price $86.21 · est. market cap ~$21.4B — last insider sale, 2026-06-16 (estimated from the dated SEC Form 4 price × shares outstanding — not a live quote)

Grade

C62

OSAT (semiconductor packaging/test) provider with thin (structural) margins but steady profitability and free cash flow.

Strengths

Risks

Notable findings

Quarterly revenue

2025-06-30 · $1.5B2025-09-30 · $2.0B2025-12-31 · $1.9B2026-03-31 · $1.7B

Last 4 quarters · from SEC filings.

Key metrics

Gross margin
14.0%
Operating margin
7.0%
Net margin
5.6%
Return on equity
8.4%
Return on assets
4.6%
ROIC
6.2%
Revenue growth (QoQ)
-10.8%
Net-income growth
5.6%
Debt / equity
0.3×
Net debt / EBITDA
-0.5×
Current ratio
2.3×
Free cash flow
$191M
EBITDA
$1.1B
Tangible book value
$4.5B
Cash & investments
$2.0B
Stock comp / revenue
0.3%

Insider transactions · last 18 months

DateInsiderTypeSharesPrice
2026-06-16ROGERS MARK NSell5.0K$86.21
2026-06-16ROGERS MARK NOption exercise5.0K$7.40
2026-06-12CHURCHILL WINSTON JSell5.0K$78.20
2026-06-12KIM SUSAN YGrant9.9K
2026-06-12CHURCHILL WINSTON JOption exercise5.0K$19.39
2026-06-09Faust MeganSell1.0K$70.30
2026-05-19Faust MeganSell1.0K$64.60
2026-05-18ROGERS MARK NOption exercise5.0K$7.40
2026-05-18ROGERS MARK NSell5.0K$71.63
2026-05-13Rutten Guillaume Marie JeanOption exercise482
2026-05-13McCourt MaryFrancesOption exercise9.9K
2026-05-13CHURCHILL WINSTON JOption exercise9.9K
2026-05-13Tily Gil C.Option exercise9.9K
2026-05-13WATSON DAVID NOption exercise9.9K
2026-05-11Tily Gil C.Sell15K$77.30
2026-05-08Rutten Guillaume Marie JeanSell50K$74.28
2026-05-05Carolin Roger AnthonyOption exercise20K$11.71
2026-05-05Carolin Roger AnthonySell20K$76.24
2026-05-05CHURCHILL WINSTON JSell7.0K$76.45
2026-05-05ALEXANDER DOUGLAS AOption exercise4.7K$9.45
2026-05-05ALEXANDER DOUGLAS ASell4.7K$76.58
2026-05-05ALEXANDER DOUGLAS AOption exercise343$8.51
2026-05-05ALEXANDER DOUGLAS ASell343$76.58
2026-04-16ROGERS MARK NSell5.0K$59.43
2026-04-16ROGERS MARK NOption exercise5.0K$7.40
2026-04-07KIM SUSAN YOption exercise20K$5.66
2026-04-07Morse Robert RandolphOption exercise20K$5.66
2026-04-07Morse Robert RandolphTax withheld2.4K
2026-03-31Rutten Guillaume Marie JeanOption exercise8.7K
2026-03-31Faust MeganOption exercise8.7K
2026-03-31Faust MeganTax withheld3.7K$45.03
2026-03-31Engel Kevin K.Option exercise8.7K
2026-03-31Engel Kevin K.Tax withheld3.7K$45.03
2026-03-16ROGERS MARK NOption exercise5.0K$7.40
2026-03-16ROGERS MARK NSell5.0K$44.54
2026-02-25Haghighi FarshadSell16K$50.50
2026-02-25WATSON DAVID NOption exercise20K$5.66
2026-02-25WATSON DAVID NTax withheld2.2K
2026-02-24Rutten Guillaume Marie JeanOption exercise11K
2026-02-24Rutten Guillaume Marie JeanSell20K$48.80
2026-02-24Faust MeganOption exercise3.5K
2026-02-24Faust MeganTax withheld1.5K$48.53
2026-02-24ROGERS MARK NOption exercise1.9K
2026-02-24ROGERS MARK NTax withheld806$48.53
2026-02-24Haghighi FarshadTax withheld815$48.53
2026-02-24Engel Kevin K.Option exercise910
2026-02-24Haghighi FarshadOption exercise1.8K
2026-02-24Engel Kevin K.Tax withheld372$48.53
2026-02-24Engel Kevin K.Sell12K$48.75
2026-02-20Engel Kevin K.Option exercise6.4K
2026-02-20Engel Kevin K.Tax withheld2.6K$47.94
2026-02-20Engel Kevin K.Option exercise10K
2026-02-20Engel Kevin K.Tax withheld4.3K$47.94
2026-02-20Faust MeganOption exercise17K
2026-02-20Faust MeganTax withheld7.2K$47.94
2026-02-20Faust MeganOption exercise18K
2026-02-20Faust MeganTax withheld7.8K$47.94
2026-02-20ROGERS MARK NOption exercise7.4K
2026-02-20ROGERS MARK NTax withheld3.2K$47.94
2026-02-20ROGERS MARK NOption exercise8.7K
2026-02-20ROGERS MARK NTax withheld3.7K$47.94
2026-02-20Rutten Guillaume Marie JeanOption exercise113K
2026-02-20Rutten Guillaume Marie JeanOption exercise59K
2026-02-20Haghighi FarshadOption exercise7.2K
2026-02-20Haghighi FarshadTax withheld3.2K$47.94
2026-02-20Haghighi FarshadOption exercise10K
2026-02-20Haghighi FarshadTax withheld4.7K$47.94
2026-02-18Faust MeganTax withheld1.9K$46.74
2026-02-18Faust MeganGrant4.5K
2026-02-18Faust MeganGrant9.3K
2026-02-18Faust MeganTax withheld4.0K$46.74
2026-02-18Haghighi FarshadGrant2.0K
2026-02-18Haghighi FarshadTax withheld1.0K$46.74
2026-02-18Haghighi FarshadGrant5.6K
2026-02-18Haghighi FarshadTax withheld2.6K$46.74
2026-02-18Rutten Guillaume Marie JeanGrant11K
2026-02-18Rutten Guillaume Marie JeanGrant31K
2026-02-18Engel Kevin K.Grant1.8K
2026-02-18Engel Kevin K.Tax withheld814$46.74
2026-02-18Engel Kevin K.Grant5.6K
2026-02-18Engel Kevin K.Tax withheld2.4K$46.74
2026-02-18ROGERS MARK NGrant2.0K
2026-02-18ROGERS MARK NTax withheld859$46.74
2026-02-18ROGERS MARK NGrant4.5K
2026-02-18ROGERS MARK NTax withheld1.9K$46.74
2026-02-17ROGERS MARK NOption exercise5.0K$7.40
2026-02-17ROGERS MARK NSell5.0K$46.92
2026-02-17Rutten Guillaume Marie JeanSell10K$45.89
2026-02-17Engel Kevin K.Sell5.3K$46.03
2026-02-16Faust MeganTax withheld1.9K$47.48
2026-02-16ROGERS MARK NOption exercise1.9K
2026-02-16ROGERS MARK NTax withheld796$47.48
2026-02-16Haghighi FarshadOption exercise1.8K
2026-02-16Rutten Guillaume Marie JeanOption exercise14K
2026-02-16Haghighi FarshadTax withheld816$47.48
2026-02-16Engel Kevin K.Option exercise1.3K
2026-02-16Engel Kevin K.Tax withheld559$47.48
2026-02-16Faust MeganOption exercise4.2K
2026-02-12KIM JOHN TSell10.0M$48.49
2026-02-12915 Investments, LPSell10.0M$48.49
2026-01-16ROGERS MARK NOption exercise5.0K$7.40
2026-01-16ROGERS MARK NSell5.0K$49.28
2026-01-15Rutten Guillaume Marie JeanSell10K$53.14
2025-12-31Engel KevinOption exercise8.7K
2025-12-31Engel KevinTax withheld3.7K$39.48
2025-12-31Faust MeganOption exercise8.7K
2025-12-31Faust MeganTax withheld3.7K$39.48
2025-12-31Rutten Guillaume Marie JeanOption exercise8.7K
2025-12-262023 Grantor Retained Annuity Trust of Susan Y. Kim Dated 9/15/2023Gift725K
2025-12-26KIM JOHN TGift725K
2025-12-26KIM SUSAN YGift725K
2025-12-26KIM AGNES CGift725K
2025-12-26KIM JAMES JGift725K
2025-12-19KIM AGNES CGift2.5M
2025-12-19KIM SUSAN YGift3.2M
2025-12-19KIM SUSAN YGift2.5M
2025-12-19KIM AGNES CGift3.2M
2025-12-19KIM JAMES JGift3.2M
2025-12-19KIM JAMES JGift2.5M
2025-12-16ROGERS MARK NOption exercise20K$7.40
2025-12-16ROGERS MARK NSell20K$42.95
2025-12-15CHURCHILL WINSTON JSell5.0K$44.29
2025-12-15CHURCHILL WINSTON JOption exercise5.0K$19.39
2025-12-15Rutten Guillaume Marie JeanSell10K$44.80
2025-12-12McCourt MaryFrancesSell20K$46.02
2025-12-12McCourt MaryFrancesOption exercise20K$19.39
2025-12-12Engel KevinSell11K$46.21
2025-12-12Tily Gil C.Sell20K$46.44
2025-12-042023 Grantor Retained Annuity Trust of Susan Y. Kim Dated 9/15/2023Gift758K
2025-12-04KIM SUSAN YGift758K
2025-12-04KIM SUSAN YGift758K
2025-11-21KIM JAMES JGift965K
2025-11-20KIM SUSAN YGift876K
2025-11-20KIM SUSAN YGift965K
2025-11-20KIM SUSAN YGrant965K
2025-11-20KIM SUSAN YGift705K
2025-11-20KIM AGNES CGift705K
2025-11-202024 Grantor Retained Annuity Trust of Agnes C. Kim dtd. 8/5/2024Gift705K
2025-11-202024 Grantor Retained Annuity Trust of James J. Kim dtd. 8/5/2024Gift965K
2025-11-202024 Grantor Retained Annuity Trust of Susan Y. Kim dtd. 8/5/2024Gift876K
2025-11-20KIM SUSAN YGift876K
2025-11-17Rutten Guillaume Marie JeanSell10K$31.68
2025-11-17ROGERS MARK NOption exercise20K$7.40
2025-11-17ROGERS MARK NSell20K$31.69
2025-11-14Engel KevinTax withheld47$31.68
2025-11-14Engel KevinOption exercise223
2025-11-14Engel KevinTax withheld223$31.68
2025-11-14Engel KevinTax withheld369$31.68
2025-11-14Engel KevinOption exercise369
2025-11-14Haghighi FarshadOption exercise66
2025-11-14Haghighi FarshadTax withheld66$31.68
2025-11-14Haghighi FarshadOption exercise67
2025-11-14Haghighi FarshadTax withheld67$31.68
2025-11-14Haghighi FarshadOption exercise269
2025-11-14Haghighi FarshadTax withheld269$31.68
2025-11-14Haghighi FarshadOption exercise395
2025-11-14Haghighi FarshadTax withheld395$31.68
2025-11-14Engel KevinOption exercise30
2025-11-14Engel KevinTax withheld30$31.68
2025-11-14Engel KevinOption exercise47
2025-11-04KIM JOHN TGift41K
2025-11-04John T. Kim 2024 GRAT #1 dtd. 08/09/2024Gift806K
2025-11-04John T. Kim 2024 GRAT #2 dtd. 08/09/2024Gift41K
2025-11-04KIM JOHN TGift806K
2025-11-04KIM JOHN TGift41K
2025-11-04KIM JOHN TGift806K
2025-10-15Rutten Guillaume Marie JeanSell10K$30.74
2025-09-30Engel KevinTax withheld3.7K$28.40
2025-09-30Engel KevinOption exercise8.7K
2025-09-30Faust MeganOption exercise8.7K
2025-09-30Faust MeganTax withheld3.7K$28.40
2025-09-30Rutten Guillaume Marie JeanOption exercise8.7K
2025-09-23Rutten Guillaume Marie JeanSell10K$30.00
2025-09-09Haghighi FarshadSell12K$25.00
2025-08-012023 Grantor Retained Annuity Trust of Agnes C. Kim Dated 4/26/2023Gift280K
2025-08-012023 Grantor Retained Annuity Trust of James J. Kim Dated 4/26/2023Gift438K
2025-08-012023 Grantor Retained Annuity Trust of James J. Kim Dated 4/26/2023Gift438K
2025-08-01Sujoda Management, LLCBuy442K$21.85
2025-08-01SUJODA Investments, LPBuy442K$21.85
2025-08-01KIM JOHN TGift438K
2025-08-01KIM JOHN TGift280K
2025-08-01KIM JOHN TBuy442K$21.85
2025-08-01KIM DAVID DBuy442K$21.85
2025-08-01KIM SUSAN YGift438K
2025-08-01KIM SUSAN YGift280K
2025-08-01KIM SUSAN YGift438K
2025-08-012023 Grantor Retained Annuity Trust of Agnes C. Kim Dated 4/26/2023Gift280K
2025-08-01KIM SUSAN YGift438K
2025-08-01KIM SUSAN YGift280K
2025-08-01KIM SUSAN YGift280K
2025-08-01KIM SUSAN YBuy442K$21.85
2025-08-01KIM AGNES CSell442K$21.85
2025-08-01KIM JAMES JSell442K$21.85
2025-07-31ROGERS MARK NSell15K$23.58
2025-07-302023 Grantor Retained Annuity Trust of Agnes C. Kim Dated 4/26/2023Gift1.7M
2025-07-302023 Grantor Retained Annuity Trust of James J. Kim Dated 4/26/2023Gift2.7M
2025-07-30KIM AGNES CGift1.7M
2025-07-30KIM SUSAN YGift2.7M
2025-07-30KIM SUSAN YGift1.7M
2025-07-30KIM AGNES CGift2.7M
2025-07-30KIM JAMES JGift2.7M
2025-07-30KIM JAMES JGift1.7M
2025-06-30Engel KevinOption exercise8.7K
2025-06-30Rutten Guillaume Marie JeanOption exercise8.7K
2025-06-30Faust MeganOption exercise8.7K
2025-06-30Faust MeganTax withheld3.7K$20.99
2025-06-30Engel KevinTax withheld3.7K$20.99
2025-05-14WATSON DAVID NOption exercise6.0K
2025-05-14Tily Gil C.Option exercise6.0K
2025-05-14Morse Robert RandolphOption exercise6.0K
2025-05-14McCourt MaryFrancesOption exercise6.0K
2025-05-14LIU JOHN DOption exercise3.0K
2025-05-14Liao Daniel JLOption exercise6.0K
2025-05-14CHURCHILL WINSTON JOption exercise6.0K
2025-05-14Carolin Roger AnthonyOption exercise6.0K
2025-05-14ALEXANDER DOUGLAS AOption exercise6.0K
2025-05-14KIM SUSAN YOption exercise6.0K
2025-03-14WATSON DAVID NOption exercise20K$6.81
2025-02-25Engel KevinSell5.5K$21.69
2025-02-25Morse Robert RandolphOption exercise20K$6.81
2025-02-24KIM JOHN TBuy870K$21.85
2025-02-24KIM AGNES CSell870K$21.85
2025-02-24Faust MeganOption exercise3.5K
2025-02-24KIM DAVID DBuy870K$21.85
2025-02-24Faust MeganTax withheld1.5K$21.95
2025-02-24KIM JAMES JSell870K$21.85
2025-02-24KIM SUSAN YBuy870K$21.85
2025-02-24Rutten Guillaume Marie JeanOption exercise11K
2025-02-24Engel KevinOption exercise910
2025-02-24Engel KevinTax withheld380$21.95
2025-02-24Haghighi FarshadOption exercise1.8K
2025-02-24Haghighi FarshadTax withheld811$21.95
2025-02-24ROGERS MARK NOption exercise1.9K
2025-02-24ROGERS MARK NTax withheld807$21.95
2025-02-24Sujoda Management, LLCBuy870K$21.85
2025-02-24SUJODA Investments, LPBuy870K$21.85
2025-02-20Faust MeganOption exercise17K
2025-02-20Rutten Guillaume Marie JeanOption exercise113K
2025-02-20Haghighi FarshadOption exercise7.2K
2025-02-20Haghighi FarshadTax withheld3.2K$23.01
2025-02-20ROGERS MARK NOption exercise7.4K
2025-02-20ROGERS MARK NTax withheld3.2K$23.01
2025-02-20Engel KevinOption exercise6.4K
2025-02-20Engel KevinTax withheld2.6K$1.00
2025-02-20Faust MeganTax withheld7.2K$23.01
2025-02-19Faust MeganGrant7.0K
2025-02-19KIM JAMES JGrant3.2K
2025-02-19KIM JAMES JTax withheld1.5K$22.72
2025-02-19Engel KevinGrant2.7K
2025-02-19Engel KevinTax withheld1.3K$22.72
2025-02-19Faust MeganTax withheld3.0K$22.72
2025-02-19Rutten Guillaume Marie JeanGrant17K
2025-02-19Haghighi FarshadGrant3.1K
2025-02-19Haghighi FarshadTax withheld1.6K$22.72
2025-02-19ROGERS MARK NGrant3.1K
2025-02-19ROGERS MARK NTax withheld1.3K$22.72
2025-02-14Engel KevinOption exercise1.3K
2025-02-14Engel KevinTax withheld559$22.51
2025-02-14Faust MeganOption exercise4.2K
2025-02-14Faust MeganTax withheld1.9K$22.51
2025-02-14Haghighi FarshadOption exercise1.8K
2025-02-14Haghighi FarshadTax withheld813$22.51
2025-02-14Rutten Guillaume Marie JeanOption exercise14K
2025-02-14ROGERS MARK NOption exercise1.9K
2025-02-14ROGERS MARK NTax withheld894$22.51
2025-02-11Carolin Roger AnthonyOption exercise20K$6.81
2025-02-11Carolin Roger AnthonyOption exercise20K$5.66
2025-02-11Haghighi FarshadOption exercise656
2025-02-11Haghighi FarshadTax withheld298$21.60
2025-02-11Engel KevinOption exercise790
2025-02-11Engel KevinTax withheld327$21.60
2025-02-11ROGERS MARK NOption exercise1.6K
2025-02-11ROGERS MARK NTax withheld787$21.60
2025-02-11Faust MeganOption exercise1.9K
2025-02-11Faust MeganTax withheld918$21.60
2025-01-17James J. Kim 2021 Qualified Annuity Trust U/A Dated 12/15/2021Gift548K
2025-01-17KIM JOHN TGift274K
2025-01-17KIM SUSAN YGift548K
2025-01-17KIM SUSAN YGift274K
2025-01-17KIM AGNES CGift548K
2025-01-17KIM JAMES JGift548K
2025-01-07James J. Kim 2021 Qualified Annuity Trust U/A Dated 12/15/2021Gift790K
2025-01-07KIM SUSAN YGift790K

All non-derivative Form 4 activity (SEC), newest first.

Notable events (8-K)

DateItems
2026-05-21Reg FDExhibitsfiling ↗
2026-05-19Shareholder votefiling ↗
2026-05-05Material agreementDebt obligation3.02Exhibitsfiling ↗
2026-05-01OtherExhibitsfiling ↗
2026-04-30OtherExhibitsfiling ↗
2026-04-27ResultsExhibitsfiling ↗
2026-02-13OtherExhibitsfiling ↗
2026-02-09ResultsExhibitsfiling ↗

Recent filings

FormFiledPeriodAccession
8-K2026-05-212026-05-210001047127-26-000036 ↗
8-K2026-05-192026-05-130001047127-26-000033 ↗
8-K2026-05-052026-04-300001047127-26-000029 ↗
8-K2026-05-012026-04-300001047127-26-000026 ↗
8-K2026-04-302026-04-300001047127-26-000023 ↗
10-Q2026-04-282026-03-310001047127-26-000020 ↗
8-K2026-04-272026-04-270001047127-26-000017 ↗
10-K2026-02-202025-12-310001047127-26-000014 ↗
8-K2026-02-132026-02-120001047127-26-000011 ↗
8-K2026-02-092026-02-090001047127-26-000007 ↗
8-K2026-02-022026-02-020001047127-26-000003 ↗
8-K2025-11-032025-10-280001047127-25-000195 ↗