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Amkor Technology vs Onto Innovation: Which Stock Looks Stronger in 2026?

Amkor Technology holds the cleaner structural position, with the lead spread across growth and valuation. Onto Innovation still has the edge on profitability, which keeps the comparison from looking entirely one-sided. The market setup is broadly comparable for both — no clear directional signal from price behavior. The market is not adding a decisive signal either way — the structural read carries the weight.

The comparison is based on similar long-term financial trajectories, not sector labels. Both peer scores are relative to the Russell 1000 universe, making them directly comparable.

Updated 2026-05-17

This is not just a one-metric split: both growth and valuation materially support the lead. The overall score gap is 23 points in favour of Amkor Technology, Inc..

INDUSTRY COMPARISON

Both operate in: Semiconductor Equipment & Materials

This comparison is based on industry proximity, not on functional trajectory similarity. AMKR and ONTO share the same industry classification.

For a similarity-based comparison, see how Amkor Technology and Onto Innovation each position within their functional peer groups in AssetNext.

Peer-Relative Score
AMKR
Amkor Technology, Inc.
51
Peer-Score
Signal qualitylow
Peer basis: Russell 1000
vs
ONTO
Onto Innovation Inc.
28
Peer-Score
Signal qualitylow
Peer basis: Russell 1000

Scores reflect position relative to comparable companies with similar long-term financial trajectories.

More than one operating dimension supports the result here.

Dimension spread: AMKR vs ONTO Profitability 36 46 Stability 25 25 Valuation 56 14 Growth 90 24 AMKR ONTO
Gap Ranking
#1 Growth +66
#2 Valuation +42
#3 Profitability +10
#4 Stability
Price Setup

Left means cheaper relative valuation. Higher means stronger structure.

Price setup map for AMKR and ONTO Stronger + cheaper Stronger + richer Weaker + cheaper Weaker + richer AMKRONTO Relative valuation Structural strength

Amkor Technology, Inc. looks stronger on relative valuation, while the broader price setup remains mixed.

Valuation position uses peer-relative PE percentile (idx_pct_pe) where available.

Entry today — historical context

Where AMKR and ONTO each sit in their own 5-year price and valuation history.

BASED ON 5-YEAR HISTORY AMKR Elevated · above norm 0th 50th 100th 0 pct gap ONTO Elevated · above norm 0th 50th 100th 99th 98th
AMKR (99th percentile) and ONTO (98th percentile) both sit in the upper portion of their own 5-year ranges. The historical entry context is broadly similar for both. This reflects entry timing, not which company is structurally stronger.

Describes historical entry positioning only. Descriptive — not investment advice.

Relative Position vs Comparable Companies
Growth
Amkor Technology, Inc. ranks near the top of the group on growth; Onto Innovation Inc. sits in the weaker half.
Valuation
Amkor Technology, Inc. sits in the stronger part of the group on valuation, while Onto Innovation Inc. is closer to mid-pack.
Growth — Dominant Gap
AMKR
90
ONTO
24
Gap+66in favour of AMKR

Earnings growth is one contributing factor within the growth lead.

What keeps the gap from being one-sided

Profitability still favours Onto Innovation, with a 10.8-point operating margin advantage keeping the comparison from looking fully resolved.

What this means for the comparison

The lead is built on both growth and valuation — though profitability still provides a counterweight.

Explore full peer positioning in AssetNext

Break down the AMKR vs ONTO comparison across all dimensions with the full interactive tool.

Explore full breakdown →
Similar growth-and-valuation comparisons

Explore how AMKR and ONTO each compare against other companies in their peer groups.

Rule-based, descriptive analysis only. Derived from peer percentile dimensions. Not investment advice. Peer groups are determined algorithmically based on structural similarity — not by sector classification alone.

How AssetNext Peer Scores Work

AssetNext scores reflect each company's structural position within its functional peer group — not a ranking against all stocks simultaneously. Peers are identified by similarity across eight financial dimensions, including revenue growth trajectory, margin structure, capital intensity, and earnings stability. A score of 75 means the company ranks in the top quartile within its own peer group, not the entire market.

Four dimension scores drive the overall peer score: Growth (revenue trajectory and expansion dynamics), Quality (margin structure and capital efficiency), Valuation (peer-relative pricing on standard multiples), and Stability (earnings consistency and financial predictability). Each dimension is scored 0–100 relative to the peer group, then combined into an overall peer score using equal weighting.

Because scores are peer-relative, the same company can have slightly different scores in different index universes. On comparison pages, both companies are shown within their shared peer universe wherever possible — so the scores are directly comparable. The peer basis is stated on each score card.

Scores are recalculated periodically as underlying financial data is updated. All analysis is descriptive and rule-based — AssetNext describes structural realities and never issues buy, sell or hold recommendations.