Stock Trading Canary

United States · SEC Form 4 · Snapshot date: 2026-10-18 · Built: 2026-10-18 · 中文

← United States · Coverage record

US · SEC FORM 4

AMKOR TECHNOLOGY, INC.

AMKR · Nasdaq · CIK 0001047127 · Technology · Semiconductor Equipment & Materials

INSIDER SIGNAL

No active buy signal

0 qualifying P purchase groups
in the current 180-day scoring window

48 Form 4 transaction lines observed in the same window
22 sales · 26 option, withholding, award, gift or other lines

Last qualifying purchase2025-08-01 · KIM DAVID D · $9.6M

WHY NO ACTIVE SIGNAL?

Purchase activityNone
Recent buyingNone
Recent salesHigh
Buy signal statusInactive
Score anatomy

No score is calculated because there is no qualifying purchase in the active window. Unavailable inputs are not treated as zero or as a bearish signal.

ClusterNot calculated
Purchase sizeNot calculated
RoleNot calculated
RecencyNot calculated
ConvictionNot calculated

Why is there no score?

  • No qualifying open-market purchase supplies cluster, size, role, recency or conviction inputs.
  • Sales and other Form 4 activity remain visible as context and do not create a negative score.

Sales and other Form 4 activity are shown separately and do not create a negative buy signal. Absence of buying is not scored as bearish.

Insider activity timeline

Owner lanes show the latest 180 days. Symbol shape identifies the transaction type; sales remain context only.

AprMayJunJulAugSepOct
Faust MeganCFO
▼▼○○▼▼▼▼
ROGERS MARK NEVP & General Counsel
○▼○▼○▼○▼
ALEXANDER DOUGLAS ADirector
○▼○▼○▼
CHURCHILL WINSTON JDirector
▼○○▼○
Rutten Guillaume Marie JeanDirector
▼○○▼▼
Engel Kevin K.President and CEO
○○▼
● Purchase▼ Sale○ Other

Showing the six most active owners; 7 additional owner(s) remain in Form 4 evidence.

Purchase breadth, concentration & cluster buying

These modules activate when qualifying purchases enter the 180-day research window.

SIGNAL HISTORY

No recorded active-signal snapshot

Scores are archived only when the company qualifies for a published US buy-signal snapshot. Last qualifying purchase: 2025-08-01 · KIM DAVID D.

Recent Form 4 activity

0Purchases
42Sales
140Other Form 4 lines
93SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING22 sale line(s) · context only
OTHER26 exercise / withholding / award / gift / other lines
10b5-1 / PLANNEDNot assessed

P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.

Market context

Market context provides additional background on recent price performance and risk. It does not affect the Insider Signal.

Price performance

1M
+18.8%
3M
-19.8%
6M
+20.0%
12M
—

Volatility & liquidity

Volatility
78.9%
Beta
2.23
Avg daily value
USD 267.5M

Valuation

Market cap
USD 13.9B
P/E
25.1×

Fundamentals

Profit margin
5.6%
ROE
8.4%
Industry
Semiconductor Equipment & Materials

Market data

Price data up to: 2026-10-03 · Price source: OpenBB/yfinance · From SEC filings: Profit margin, ROE · Fiscal year ended: 2025-12-31 · From Yahoo Finance: Market cap, P/E · Status: PASS

Short interest

Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.

Shares short
10,662,762
Previous report
9,900,880
Avg daily volume
3,471,917
Days to cover
3.1

FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.

Historical equity purchases

Qualifying code P transactions in the local Form 4 history, including purchases outside the current signal window.

Transaction dateReporting ownerTypeSecuritySharesAvg. priceApprox. valueSource
2025-08-01Sujoda Management, LLCPurchase (P)Common Stock441,589USD 21.85USD 9,648,720SEC filing ↗
2025-08-01SUJODA Investments, LPPurchase (P)Common Stock441,589USD 21.85USD 9,648,720SEC filing ↗
2025-08-01KIM SUSAN YPurchase (P)Common Stock441,589USD 21.85USD 9,648,720SEC filing ↗
2025-08-01KIM JOHN TPurchase (P)Common Stock441,589USD 21.85USD 9,648,720SEC filing ↗
2025-08-01KIM DAVID DPurchase (P)Common Stock441,589USD 21.85USD 9,648,720SEC filing ↗
2025-02-24Sujoda Management, LLCPurchase (P)Common Stock869,565USD 21.85USD 18,999,995SEC filing ↗
2025-02-24SUJODA Investments, LPPurchase (P)Common Stock869,565USD 21.85USD 18,999,995SEC filing ↗
2025-02-24KIM SUSAN YPurchase (P)Common Stock869,565USD 21.85USD 18,999,995SEC filing ↗
2025-02-24KIM JOHN TPurchase (P)Common Stock869,565USD 21.85USD 18,999,995SEC filing ↗
2025-02-24KIM DAVID DPurchase (P)Common Stock869,565USD 21.85USD 18,999,995SEC filing ↗
2021-12-30KIM JAMES JPurchase (P)Common Stock1,855,753USD 24.68USD 45,799,984SEC filing ↗
2021-12-30KIM AGNES CPurchase (P)Common Stock1,856,473USD 24.68USD 45,817,754SEC filing ↗
2020-03-09ROGERS MARK NPurchase (P)Common Stock2,500USD 9.14USD 22,850SEC filing ↗

Form 4 evidence

182 transaction lines in the latest 365-day window; 979 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-13Faust MeganSale (S)Common Stock1,000USD 46.92USD 46,920SEC filing ↗
2026-10-02ALEXANDER DOUGLAS ASale (S)Common Stock5,000USD 55.00USD 275,000SEC filing ↗
2026-10-02ALEXANDER DOUGLAS AOption exercise / conversion (M)Common Stock5,000USD 8.51USD 42,550SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-13Faust MeganSale (S)Common Stock1,000USD 46.92USD 46,920SEC filing ↗
2026-10-02ALEXANDER DOUGLAS ASale (S)Common Stock5,000USD 55.00USD 275,000SEC filing ↗
2026-10-02ALEXANDER DOUGLAS AOption exercise / conversion (M)Common Stock5,000USD 8.51USD 42,550SEC filing ↗
2026-09-08Faust MeganSale (S)Common Stock1,000USD 49.05USD 49,050SEC filing ↗
2026-08-17ROGERS MARK NSale (S)Common Stock5,000USD 59.78USD 298,900SEC filing ↗
2026-08-17ROGERS MARK NOption exercise / conversion (M)Common Stock5,000USD 7.40USD 37,000SEC filing ↗
2026-08-11Faust MeganSale (S)Common Stock1,000USD 54.45USD 54,450SEC filing ↗
2026-08-07ALEXANDER DOUGLAS ASale (S)Common Stock5,000USD 55.81USD 279,050SEC filing ↗
2026-08-07ALEXANDER DOUGLAS AOption exercise / conversion (M)Common Stock5,000USD 8.51USD 42,550SEC filing ↗
2026-08-06Rutten Guillaume Marie JeanSale (S)Common Stock25,000USD 54.50USD 1,362,500SEC filing ↗
2026-08-05Rutten Guillaume Marie JeanSale (S)Common Stock25,000USD 55.35USD 1,383,750SEC filing ↗
2026-07-30Engel Kevin K.Sale (S)Common Stock3,221USD 47.00USD 151,387SEC filing ↗
2026-07-30CHURCHILL WINSTON JGift (G)Common Stock100USD 0.00USD 0SEC filing ↗
2026-07-20KIM JAMES JOption exercise / conversion (M)Common Stock450,000USD 9.65USD 4,342,000SEC filing ↗
2026-07-20KIM AGNES COption exercise / conversion (M)Common Stock450,000USD 9.65USD 4,342,000SEC filing ↗
2026-07-16ROGERS MARK NSale (S)Common Stock5,000USD 65.12USD 325,600SEC filing ↗
2026-07-16ROGERS MARK NOption exercise / conversion (M)Common Stock5,000USD 7.40USD 37,000SEC filing ↗
2026-07-14Faust MeganSale (S)Common Stock1,000USD 69.91USD 69,910SEC filing ↗
2026-06-30Rutten Guillaume Marie JeanOption exercise / conversion (M)Common Stock8,692USD 0.00USD 0SEC filing ↗
2026-06-30Faust MeganOption exercise / conversion (M)Common Stock8,692USD 0.00USD 0SEC filing ↗
2026-06-30Faust MeganTax withholding (F)Common Stock3,725USD 86.23USD 321,207SEC filing ↗
2026-06-30Engel Kevin K.Option exercise / conversion (M)Common Stock8,692USD 0.00USD 0SEC filing ↗
2026-06-30Engel Kevin K.Tax withholding (F)Common Stock3,725USD 86.23USD 321,207SEC filing ↗
2026-06-16ROGERS MARK NSale (S)Common Stock5,000USD 86.21USD 431,050SEC filing ↗
2026-06-16ROGERS MARK NOption exercise / conversion (M)Common Stock5,000USD 7.40USD 37,000SEC filing ↗
2026-06-12CHURCHILL WINSTON JSale (S)Common Stock5,000USD 78.20USD 391,000SEC filing ↗
2026-06-12CHURCHILL WINSTON JOption exercise / conversion (M)Common Stock5,000USD 19.39USD 96,950SEC filing ↗
2026-06-12KIM SUSAN YAward / grant (A)Common Stock9,893USD 0.00USD 0SEC filing ↗
2026-06-09Faust MeganSale (S)Common Stock1,000USD 70.30USD 70,300SEC filing ↗
2026-05-19Faust MeganSale (S)Common Stock1,000USD 64.60USD 64,600SEC filing ↗

Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.

Snapshot & identity

Snapshot date2026-10-18
Ranking versionUS-v1.2
Data qualityPASS ELIGIBLE · —
TickerAMKR
CIK0001047127
SectorTechnology
IndustrySemiconductor Equipment & Materials Yahoo Finance
SEC SIC3674 Semiconductors & Related Devices
ExchangeNasdaq

Data coverage

Local Form 4 history979 transaction lines from 2020-02-21 to 2026-10-13
15 P purchase lines · 214 S sale lines · 750 other lines
SEC company submissionsOpen SEC filings ↗

Local ledger as of 2026-10-18. Mapping status is an audit field and does not erase SEC filing evidence.