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Stock Comparison · Structural lead, mixed market

Arch Capital Group vs Arthur J. Gallagher & Co.: Which Stock Looks Stronger in 2026?

Arch Capital holds the cleaner structural position, with the lead spread across profitability and valuation. Arthur J. Gallagher still has the edge on growth, which keeps the comparison from looking entirely one-sided. The market setup broadly confirms the structural lead — Arch Capital holds the more constructive position. That puts structure and market broadly in agreement — Arch Capital's lead looks more confirmed than conflicted.

The comparison is based on similar long-term financial trajectories, not sector labels. Both peer scores are relative to the S&P 500 universe, making them directly comparable.

Updated 2026-07-05

The clearest separation starts in profitability, but valuation adds another real layer to the result. Arch Capital Group Ltd. leads by 27 points on the overall comparison score.

Trajectory Similarity
0.67
Moderately similar
Peer-set rank: #10
within Arch Capital Group Ltd.'s functional peer set

This pair is matched through long-term financial trajectory similarity within the selected peer universe.

This level of similarity points to a meaningful structural match, though not a tight one.

Most of the shared profile comes through investment intensity and recent revenue growth.

Similarity drivers
investment intensityrecent revenue growth
How to read the score
0.85–1.00 · Very similar0.70–0.84 · Similar0.55–0.69 · Moderately similarbelow 0.55 · Loose match
Peer-Relative Score
ACGL
Arch Capital Group Ltd.
72
Peer-Score
Signal qualitylow
Peer basis: S&P 500
vs
AJG
Arthur J. Gallagher & Co.
45
Peer-Score
Signal qualitylow
Peer basis: S&P 500

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

The largest gaps do not all point in the same direction.

Dimension spread: ACGL vs AJG Profitability 63 22 Stability 90 66 Valuation 88 48 Growth 45 56 ACGL AJG
Gap Ranking
#1 Profitability +41
#2 Valuation +40
#3 Stability +24
#4 Growth +11
Price Setup

Left means cheaper relative valuation. Higher means stronger structure.

Price setup map for ACGL and AJG Stronger + cheaper Stronger + richer Weaker + cheaper Weaker + richer ACGLAJG Relative valuation Structural strength

Arch Capital Group Ltd. looks stronger both structurally and on relative valuation.

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

Entry today — historical context

Where ACGL and AJG each sit in their own 5-year price and valuation history.

BASED ON 5-YEAR HISTORY ACGL Elevated · above norm 0th 50th 100th 26 pct gap AJG Elevated · below norm 0th 50th 100th 97th 70th
Today AJG sits in the upper-middle of its own 5-year history (70th percentile), while ACGL sits higher in its own history (97th). Within each stock's own 5-year context, AJG is at a historically more favourable entry position than ACGL. This reflects entry timing, not which company is structurally stronger — peer-relative analysis is a separate question addressed above.

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

Relative Position vs Comparable Companies
Profitability
On profitability, Arch Capital Group Ltd. is positioned higher in the group, while Arthur J. Gallagher & Co. is closer to the middle.
Valuation
Both profiles are strong on valuation, but Arch Capital Group Ltd. leads clearly.
Profitability — Dominant Gap
ACGL
63
AJG
22
Gap+41in favour of ACGL

Capital efficiency adds support, with a 13.8-point ROIC advantage.

What keeps the gap from being one-sided

Arthur J. Gallagher still pushes back on growth, with a 38-point revenue-growth advantage that keeps the read from becoming one-way.

What this means for the comparison

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

Explore full peer positioning in AssetNext

Break down the ACGL vs AJG comparison across all dimensions with the full interactive tool.

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Similar profitability-and-valuation comparisons

Explore how ACGL and AJG 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.