Arista's 45.4% margin vs Vertiv's 19.5%: AI infrastructure profit gap

Arista Networks and Vertiv occupy different parts of the AI infrastructure build-out: Arista supplies data-center networking, while Vertiv supplies power and cooling. Both benefit when AI campuses become operational, but their reported results show a sharp difference in profitability. Arista's August 4 results included second-quarter revenue of $3.036 billion, up 37.7%, and a 45.4% GAAP operating margin. Vertiv's July 29 release reported $3.274 billion of sales, up 24%, and a 19.5% GAAP operating margin; its organic growth was 18%, with acquisitions and currency contributing the rest.

Sensitivity to margin compression is isolated by subtracting five percentage points from each margin while holding revenue constant. Under that scenario, Arista's operating profit falls 11.0%, while Vertiv's falls 25.6%. The piece notes this does not assume networking and thermal equipment face identical shocks, since customer pricing, manufacturing costs, and project timing can affect them differently. Arista's software-supported networking model currently retains more operating profit per sales dollar, a cushion that can help absorb investment and price pressure, though large-customer concentration makes order timing important. Vertiv's lower margin also gives it room to improve as volume rises and operations become more efficient, with greater computing density increasing cooling and power requirements; its risk is that customers delay campuses or expansion costs arrive before revenue.

On cash generation, Vertiv's Q2 adjusted free cash flow reached $925 million, with favorable working-capital timing helping the result, but extrapolating that quarter would overstate certainty. October 15 trailing cash-flow multiples were about 45 for Arista and 28 for Vertiv, so Arista's larger margin cushion comes with a higher cash-flow price. Insider Monkey counted 91 Arista holders in Q2 2026, up from 85, and 112 Vertiv holders, up from 96; Arrowstreet cut Arista shares 10%, while AQR increased Vertiv shares 1%. September 30 short interest was 0.97% of float for Arista, and Vertiv had 14.38 million shares sold short.