Menu

sPEG Index · watchlist

Arista

SDS 13/20 · [2 · 3 · 3 · 2 · 3] · ordinal

Ethernet switching systems, EOS software, and support for cloud and AI data-center networks.

Reviewed 2026-09-17 · Next review 2026-12-16 · released speg-index-2026-09-17-v1

Five judgments

Constraint · Low

2/4

Technical integration exists, but qualified systems and disaggregated alternatives keep feasible supply broader than C3.

Counterevidence: Open standards, disaggregation, SONiC, and rival systems provide real customer alternatives.

Substitution resistance · Moderate

3/4

Operational consistency and installed workflows create material switching work.

Counterevidence: Open standards, disaggregation, SONiC, and rival systems provide real customer alternatives.

Economic capture · Moderate

3/4

Reported margins show current retention, without proving the portion caused by durable scarcity.

Counterevidence: Open standards, disaggregation, SONiC, and rival systems provide real customer alternatives.

Persistence · Low

2/4

Customer alternatives and concentration leave the three-to-five-year rent-retention case unresolved.

Counterevidence: Open standards, disaggregation, SONiC, and rival systems provide real customer alternatives.

Cost of defense · Moderate

3/4

Current retained economics remain material after operating investment.

Counterevidence: Open standards, disaggregation, SONiC, and rival systems provide real customer alternatives.

Admission gates

dimension floors: fail — At least one dimension is unknown or below its floor.
materiality: pass — Company-level materiality route is documented.
decisive confidence: fail — At least one decisive dimension is below Moderate confidence.
source packet: fail — Minimum admission packet is incomplete.
current review: pass — Structural review is current at the research cutoff.
material event: pass — No unresolved material eligibility event is recorded at the research cutoff.

Rationale, falsifiers, and next observation

13/20; watchlist Q2 revenue was $3.036bn and GAAP operating margin 45.4%. Its release identifies large-customer concentration, merchant-silicon dependence and competition. EOS documents operational consistency, but also open standards, disaggregation and customer alternatives including SONiC. [R1–R2] **Judgment:** S3/E3/D3 reflect integration and retained economics; C2/P2 reflect unresolved limits on customer alternatives and durable rent retention. Low confidence applies to the broad scarcity claim, not to the reported margin. A component shortage may hurt delivery rather than enrich Arista. **Admission evidence needed:** external customer evidence of switching/qualification costs and retention through rival offerings, with a credible three-to-five-year path. Next review at results or by December 16. Material customer migration, lower support renewals or supplier capture would weaken the thesis.

Material customer migration
Lower support renewal economics
Supplier capture of the economic benefit

Next: Obtain external customer evidence on migration cost and retention through rival offerings.

Valuation context

PEG: unavailable (qualified reference path not assembled). Economic sPEG: unavailable (paired valuation uncalibrated). SDS is not a valuation input.

Source packet

R1 · Arista Networks · Arista Q2 results — Margin plus customer/supplier/competition risks R2 · Arista Networks · Arista EOS — Integration and countervailing interoperability