Arista and Vertiv rank tenth and ninth in our 10 Best AI Infrastructure Stocks to Buy for the Long Term. The list shows which eight infrastructure businesses attracted more hedge-fund holders. Both benefit when AI campuses become operational, but their profit cushions differ sharply. Arista Networks, Inc. (NYSE:ANET) supplies data-center networking; Vertiv Holdings Co (NYSE:VRT) supplies power and cooling. They are alternatives for an infrastructure allocation, with different products and economics.
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High margins change the cost of disappointment
Arista’s August 4 results showed 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. Vertiv’s organic growth was 18%; acquisitions and currency contributed the rest.
Subtract five percentage points from each margin while holding revenue constant. Arista’s operating profit falls 11.0%; Vertiv’s falls 25.6%. This isolates sensitivity to margin compression. It does not assume that networking and thermal equipment face identical shocks: 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. That cushion can help absorb investment and price pressure, but large-customer concentration makes order timing important. Our Cisco comparison asks how much of Arista’s stronger economics investors are already paying for.
Cooling growth has to become recurring cash
Vertiv’s lower margin also gives it room to improve as volume rises and operations become more efficient. Greater computing density increases cooling and power requirements. Its risk is that customers delay campuses or expansion costs arrive before revenue. Q2 adjusted free cash flow reached $925 million, with favorable working-capital timing helping the result; extrapolating that quarter would overstate certainty.
October 15 trailing cash-flow multiples were about 45 for Arista and 28 for Vertiv. Arista’s larger margin cushion therefore comes with a higher cash-flow price. That premium needs durable growth and collections, while Vertiv must preserve cash generation after investment. These current multiples do not establish comparable future shareholder returns.
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; Vertiv had 14.38 million shares sold short. Those snapshots cannot explain later trading moves.
Arista has the larger demonstrated margin buffer. Vertiv’s operating upside depends more heavily on improving execution as demand expands. The choice turns on whether Arista sustains its economics or Vertiv closes part of the profit gap while converting growth into cash. Today’s margin difference answers the resilience question, not which stock will deliver the higher return.
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