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Amkor Technology Inc (AMKR) — chart, structure and Closelook read

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Company snapshot — Amkor Technology Inc

AMKR in five paragraphs: what it makes and sells, where it sits in the Closelook stack, who it is priced against, why we track it, what we watch. Research diary, not advice.

What it does
Amkor provides outsourced assembly and test services for semiconductor chips: it takes finished wafers from a fab, cuts them into dies, packages them, and tests the finished part before it ships to a customer. Its packaging methods cover flip-chip, wafer-level and system-in-package builds used in phones, computing, automotive and other electronics, and its test services check chips at wafer, package and system level. It works for chip designers, integrated device makers and foundries and is based in Tempe, Arizona.
Where it sits in the stack
In our Rubin Build-Out 100 index, Amkor sits in Layer 2, Fabrication, in the Foundry & Integration sleeve, alongside the firms that turn a design file into a working die. Amkor does the assembly and test step that follows wafer fabrication, so it is a customer of foundry capacity and a constraint on how quickly finished dies reach the packaging stage.
Who it is priced against
Closelook's peer group for this sleeve is Foundry & Integration, built around pure-play foundries and IDMs where capacity is the binding constraint; it lists Taiwan Semiconductor Manufacturing, ASE Industrial Holding, Tower Semiconductor and Globalfoundries alongside Amkor. The market also names JCET as a comparable outsourced-assembly competitor.
Why Closelook tracks it
Amkor is a constituent of the Rubin Build-Out 100 and carries a Closelook score, where the balance-sheet module reads strongest and momentum weakest. Our market-structure work has used it to show why the standard semiconductor bucket mixes unlike businesses together, and the Morning 10 has scanned it inside a semiconductor support cluster with ASML and ASM.
What the diary watches
The diary watches whether advanced packaging demand tied to AI chip stacks feeds through into Amkor's order book, and whether the momentum reading recovers from its current weak state.

Amkor Technology Inc (AMKR) trades on US exchanges, classified under Technology, and sits in Layer 2 of the build-out stack. Constituent of Rubin Build-Out 100.

The Closelook company score reads 40/100 composite (momentum 18, quality 27, valuation 51) across 7 modules — the full breakdown, chart structure and analog history load live above.

Written from the company’s public profile and Closelook’s own readings, 2026-09-17. Descriptive, refreshed with the registry; corrections welcome via the imprint. closelook.net is an investment research diary — market structure, index membership and scores are our own readings, not investment advice. Related: index compare · sector dispersion · scanner.

Signals for this name

Every Closelook reading that exists for AMKR, from the same nightly bakes the boards use. Research diary readings, not advice.

Who it is priced against Rubin Build-Out 100 · Foundry & Integration · 4 names with week and year-to-date

Peer group

Rubin Build-Out 100 · Foundry & Integration

Pure-play foundries and IDMs that turn design files into working dies. Capacity here is the binding constraint.

Compared against AMKR on the nightly bakes; the Peers tab ranks the cohort on the Closelook scores where it exists.

Versus its index Rubin Build-Out 100 — the name, its sleeve and the index over day, week and month

Versus its index

The name against its Closelook index and its own sleeve — equal-weight, nightly closes.

Rubin Build-Out 100 · as of 2026-09-16

DayWeekMonth3 months
AMKR−0.2%−9.9%−24.5%−46.5%
Foundry & Integration+1.6%−6.8%−14.6%—
Rubin Build-Out 100+1.9%−5.3%−7.4%—

Against the index: 4.6 pts behind on the week, 17.1 pts behind on the month; against its Foundry & Integration sleeve 9.9 pts behind on the month.

Returns from the index workers’ nightly closes; equal-weight sleeves. A relative reading from the research diary, not advice.

Weather around the name 4 macro readings: Money Temperature, Factor regime, Sector × region …

The weather around this name

Macro readings that apply by membership — the regime, the factor tape, the sector cell, the funding backdrop.

  • Money Temperature Composite 45/100 · S&P 500 fund at 42, above its 200-day averageEight instruments scored on position, momentum, volume, volatility and fragility — the regime every name trades inside. Temperature lab → 2026-09-16
  • Factor regime Momentum leadership cooling, still above trendMomentum against low volatility (SPMO / SPLV): above its 50-day trend, 91th percentile of the window, -0.7% over 20 sessions. Factor regime → 2026-09-16
  • Sector × region Technology in US: −2.1% week · −3.4% month · −1.2% quarter · +32.1% yearThe Sector Engine cell this name lives in, from XLK.US; the 11 × 4 matrix shows where its sector is being bought and where it is being sold. Sector Engine → 2026-09-16
  • Sovereign pressure Index 0.17 · up 0.22 over 21 sessionsG7 long-end yields, 10s30s and the slope — the funding weather for every balance sheet on this site. Sovereign pressure → 2026-09-16

FAQ · from the current data · as of 2026-09-17

Quick answers

What is Amkor Technology Inc (AMKR)?

Amkor Technology Inc trades as AMKR on the US exchange (US) and is classified under Technology in the Closelook research universe, as of the registry build of 2026-09-17.

Is AMKR in a Closelook index?

Yes — Amkor Technology Inc is a constituent of Rubin Build-Out 100, as of 2026-09-17.

What is Amkor Technology Inc's Closelook composite score?

40 out of 100, with momentum 18, quality 27 and valuation 51 sub-scores, as of 2026-09-17. Scores are Closelook's own research readings, not ratings or investment advice.

Where does AMKR trade against its moving averages?

Death cross: Its 50-day crossed below its 200-day 4 sessions ago — a death cross, the classic trend-turn-lower. As of 2026-09-16 — a technical state from the nightly Closelook bake, not advice. The Technical tab carries the full row.

How is AMKR doing against its Closelook index?

Over the past month Amkor Technology Inc is −24.5% against −7.4% for the Rubin Build-Out 100 — 17.1 points behind its index, as of 2026-09-16. Its Foundry & Integration sleeve is −14.6% over the same month. The “Versus its index” table on this page carries the day, the week and the month for the name, its sleeve and the index.

What does Amkor Technology Inc do?

Amkor provides outsourced assembly and test services for semiconductor chips: it takes finished wafers from a fab, cuts them into dies, packages them, and tests the finished part before it ships to a customer. Its packaging methods cover flip-chip, wafer-level and system-in-package builds used in phones, computing, automotive and other electronics, and its test services check chips at wafer, package and system level. It works for chip designers, integrated device makers and foundries and is based in Tempe, Arizona. Closelook's peer group for this sleeve is Foundry & Integration, built around pure-play foundries and IDMs where capacity is the binding constraint; it lists Taiwan Semiconductor Manufacturing, ASE Industrial Holding, Tower Semiconductor and Globalfoundries alongside Amkor. The market also names JCET as a comparable outsourced-assembly competitor.

Where does Amkor Technology Inc sit in the AI build-out?

In our Rubin Build-Out 100 index, Amkor sits in Layer 2, Fabrication, in the Foundry & Integration sleeve, alongside the firms that turn a design file into a working die. Amkor does the assembly and test step that follows wafer fabrication, so it is a customer of foundry capacity and a constraint on how quickly finished dies reach the packaging stage. Amkor is a constituent of the Rubin Build-Out 100 and carries a Closelook score, where the balance-sheet module reads strongest and momentum weakest. Our market-structure work has used it to show why the standard semiconductor bucket mixes unlike businesses together, and the Morning 10 has scanned it inside a semiconductor support cluster with ASML and ASM.

Where has Closelook written about Amkor Technology Inc?

Amkor Technology Inc appears in 2 Closelook pieces, most recently Morning 10: The tailwind is gone — KOSPI gives back 5.2%, the yen gets ¥8tn of help, Palantir referees tonight (2026-08-03); Report: Market Structure — Structural Awareness in an Asynchronous Market (2026-03-17). What Closelook said most recently: Scanner — semi support confluence (ASML, AMKR, ASM) (Morning 10, 2026-08-03). The "Mentioned on Closelook" block on this page lists the long reads, the reference entries and the dailies that name it.

What does this page show?

A live price chart with SMA overlays and drawing tools for AMKR, performance metrics, index-membership context and the Closelook structure read — an investment research diary view, not investment advice.

Mentioned on Closelook 2 pieces · newest: Morning 10, “The tailwind is gone — KOSPI gives back 5.2%, the yen gets ¥8tn of help, Palantir referees tonight” (2026-08-03)

Mentioned on Closelook

Where AMKR appears in the diary — 2 pieces, newest first. Every link is our own writing.

Long reads

Dailies

Related in the Closelook universe