Three months ago, Arista Networks told a story that most hardware companies only dream about: the parts shortage that had been capping its growth was finally easing, and a demand backlog it had been forced to ration could now be shipped. The company raised its full-year revenue outlook for the third time, to $12.6 billion and roughly 40% growth, and lifted its operating margin target to 48% to 49%. Since then, the stock has fallen 18%, trailing the S&P 500 by about 16 percentage points. The upcoming third-quarter report is the first real test of whether that supply-unlocked narrative was substance or optimism.
Wall Street expects non-GAAP earnings of $1.08 per share on revenue of $3.31 billion, which would represent growth of about 43% from the $2.31 billion reported a year ago and a jump of roughly 60% from last year's $0.67 per share. Those numbers sit squarely on management's own outlook. Arista guided to earnings of $1.06 to $1.08 and revenue of about $3.30 billion, so consensus is parked at the very top of the earnings range rather than above it. The Earnings Whisper of $1.15 is meaningfully higher, signaling that the more aggressive corner of the market expects Arista to repeat its habit of clearing its own bar by a wide margin. That habit is well established: last quarter the company delivered its first quarter above $3.0 billion against a $2.8 billion guide.
The most important evidence will be operational rather than headline. Management credited the upside to concrete de-bottlenecking work, including memory secured for 2026 with visibility into 2027, a new liquid-cooling supply chain, a third contract manufacturer and a third distribution site. If those changes are working, revenue should land comfortably above $3.3 billion and purchase commitments, which climbed to $9.7 billion last quarter, should remain elevated as a signal of multi-year customer demand. A result that merely matches guidance would not break the story, but it would suggest the supply relief is more gradual than the tone of the last call implied.
Margins are the next swing factor. Gross margin improved to 63.4% last quarter, helped partly by tariff refunds and favorable mix, yet management left its 62% to 64% range unchanged and warned that component price increases will hit cost of goods more heavily in late 2026 and 2027 as older backlog clears. Any early erosion would call into question the newly raised operating margin target. Investors should also scrutinize deferred revenue, which reached $6.9 billion, and inventory of $2.5 billion. Both are lumpy by nature, but a further build without matching shipments would raise cash-flow timing concerns.
On the demand side, Arista reaffirmed rather than raised its AI fabrics target of at least $3.5 billion, attributing the bigger annual guide to core data center, enterprise and routing. Updates on scale-across networking, the new 100-terabit 7060X6 platform, and expanding work with AI labs that could become a 10% customer would show whether the AI pipeline is widening beyond the largest cloud buyers.
The mood heading into the print is far cooler than it was last time. Sentiment has slipped to barely bullish from a clearly positive reading before the prior report, and the stock at $172.37 sits near the bottom of its post-earnings range of $168.25 to $217.41, though still above its 200-day moving average around $164. That combination lowers the emotional bar even as the numerical bar stays high. The central question is whether Arista can show that its supply chain fixes translate into another beat and a fourth raise of its annual outlook without sacrificing margin. Delivering both would validate the narrative; delivering only the guide may leave a skeptical market unconvinced.