Earnings Call Highlights: Arista Networks (ANET) | Q2 FY2026 — First $3B Quarter, Full-Year Guidance Raised a Third Time to $12.6B, All-In on Scale-Across

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Arista delivered its first-ever quarter above $3 billion (GAAP revenue of $3,035.7M, +37.7% YoY) and raised its full-year 2026 revenue guidance for the third time in the same year, to roughly $12.6B, up 40% YoY. Three things matter more: first, the $1.1B raise comes mainly from the core data center front end, enterprise and routing, not AI or campus — management is effectively admitting that the core business once criticized as "too flat" is coming back; second, the supply chain went from public complaints six months ago to concrete results this quarter, with purchase commitments surging from $3.6B to $9.7B in a year; third, Arista shifted its narrative focus from scale-out to scale-across (data center interconnect), calling it a $15B–$20B TAM by 2030. All financial figures in this article are GAAP and match the STT earnings data card.

This article is for technology and industry trend analysis only and does not constitute investment advice.

1. Executive Takeaway: This Quarter in 30 Seconds

First, this is a "the core business is back" report, not one propped up by AI alone. The key signal this quarter isn't the size of the AI numbers; it's that management deliberately did not attribute the $1.1B full-year raise to AI or campus, instead naming the core data center front end, enterprise and routing. CEO Jayshree Ullal even directly answered analysts' earlier question of "why is your core front end so flat?" — the answer: "it won't stay flat."

Second, the supply chain went from pain to delivery. For the past two quarters Arista talked openly about component shortages; this quarter COO Todd Nightingale showed results: memory (DDR4/DDR5/NAND) is locked through 2026 with visibility into 2027, PCB and optics capacity can be built within 12 months, and an entire liquid-cooling supply chain has been set up. This is the firmest backing for the full-year raise.

Third, the battleground is moving to scale-across. From scale-up and scale-out to this quarter's headline scale-across, Arista positions its flagship 7800 spine as the backbone across data centers, and uses software capabilities like SRv6 and MRC to frame "compute, space and power will always be scarce" as a structural long-term trend rather than a temporary one.

2. Revenue and Financials

Arista's GAAP revenue this quarter reached $3,035.7M (about $3.04 billion), +37.7% YoY and +12.1% QoQ, beating its own $2.8B guidance — the company's first-ever quarter above $3 billion. For comparison, the entire fiscal year five years ago (2021) was only $2.9B; a single quarter now nearly matches a full year back then.

Profitability (GAAP): gross margin of 62.9%, down 2.3 points YoY (65.2% a year ago), mainly due to a mix effect from a higher share of large customers; operating income of $1,378.0M, operating margin 45.4%, +39.7% YoY; net income of $1,212.9M, +36.5% YoY; GAAP diluted EPS of $0.95, +35.7% YoY ($0.70 a year ago). On the non-GAAP basis management habitually cites on the call, gross margin was 63.4%, operating margin 49.9% and diluted EPS $1.02 — both sets of numbers are on the data card to avoid confusion.

By segment, Product revenue was $2,605.2M (+38.8% YoY) and Service revenue $430.5M (+31.3% YoY). Product grew slightly faster than service, consistent with a hardware-shipment-driven cycle. International revenue was $697.8M, jumping to 23% of the total (from just 13.5% last quarter); the CFO attributed this to a change in the geographic shipment mix of large global customers — worth watching, since it directly affects gross margin mix.

The balance sheet is healthy too: $13.3B in cash and marketable securities, about $1.1B in quarterly operating cash flow, $2.5B of inventory and $6.9B of deferred revenue (product deferred revenue rose by about $600M in the quarter alone).

3. Technology and Business Highlights

Etherlink has passed 100 cumulative customers. From the "four to five" Jayshree cited in 2024 to over a hundred now, this is the key indicator that Arista's AI fabric has moved from lighthouse customers to volume. On the technology side, the quarter brought three acronyms, each aimed at a real pain point in AI networking:

SSU (Smart System Upgrade): upgrade switch software without a reboot. In an AI cluster every minute of XPU downtime costs money; SSU lets security patches go in without sacrificing compute cycles.
MRC (Multipath Reliable Connection): lets a single flow be "sprayed" across multiple paths and reassembled at the receiver, fixing the collision problem in first-generation AI networks where two flows hashed onto the same link each run at half speed.
SRv6 load balancing: uses segment routing to precisely specify each packet's path, then dynamically avoids hotspots based on real-time congestion signals. The key is that the same EOS runs end to end, from the scale-out fabric to long-haul scale-across routing.

On hardware, the latest 7060X-E7 offers 100 Tbps of capacity and 1.6 Tbps throughput, with a liquid-cooling option for the first time; the flagship 7800 AI spine is positioned as the core of scale-across, increasing scale (radix) without adding network tiers. We broke down this "three networks" division of labor from a packaging perspective in The Great Optical Packaging Transition (Part 2): CPO's Three-Stage Evolution — Scale-Out Moves First, Scale-Up Is the Endgame, which makes a good counterpart to Arista's networking view.

The scale-across thread also lines up with Google's earnings call this quarter, which pushed capex emphasis toward cross-data-center connectivity — for context, see Alphabet FY2026 Q2: The Next Battleground for Optical Interconnect Is Across Data Centers. Arista sizes the scale-across TAM at $15B–$20B by 2030 and says it currently accounts for about 30% of its 2026 AI target (at least $3.6B), or roughly $1.2B.

4. Management Outlook: The Confidence and Wording Behind a Third Raise

Guidance was the headline this quarter. For next quarter, Q3 FY2026 revenue guidance is about $3.3B, with non-GAAP operating margin of 48–49%, non-GAAP diluted EPS of $1.06–1.08 and a tax rate of about 21.5%.

The real news is the full year: 2026 revenue raised to about $12.6B, up 40%, the third raise in the same year — $2.1B above the $10.5B Analyst Day target and another $1.1B above the $11.5B given in May. By component, the full-year campus target is at least $1.25B and AI Fabrics at least $3.5B, gross margin stays at 62–64%, and the full-year operating margin target rises to 48–49%.

Two details in the wording are worth catching. First, when asked where the $1.1B raise should be allocated, Jayshree deliberately declined to commit to a breakdown, saying she wants to keep flexibility in the shipment mix (front-end AI, Wi-Fi, wired, Etherlink and routing are all possible), offering only that "all the numbers are going up." That "definitely higher, but no locked-in split" tone signals confidence on demand while supply remains a variable. Second, she said plainly that supply "is a two-year industry problem that won't end before 2028," anchoring her optimism in Arista out-executing peers rather than the industry shortage easing — a very pragmatic framing.

5. Supply Chain and Customer Clues

The supply chain is this quarter's hidden storyline. Purchase commitments nearly tripled in a year from $3.6B to $9.7B. Arista hired a new senior COO, Eugenia Corrales, and raised deliverability with four moves: locking in memory, qualifying new suppliers, negotiating shorter lead times and building a liquid-cooling supply chain. Three contract manufacturers and three distribution sites (the US, Asia and Mexico) also provide geographic diversification. This "demand is certain, supply releases gradually" narrative matches the broader AI supply chain view this week that the decisive battleground has moved to the supply side. Further reading: After the $725B Capex Decision, the Decisive Battleground for Optics Has Moved to the Supply Side (W31 Weekly Review).

Customer clues. Jayshree reaffirmed Microsoft and Meta as the two longest-standing 10% customers and said she "expects one or two 10% customers" — combined with the security webinar co-hosted with Anthropic mentioned in the press release, this opens up market speculation about a third 10%-class AI lab customer. On accelerators, she named enthusiasm for AMD's MI series and Google TPU, and said frankly that "we live in an NVIDIA world," but that Arista has more room to participate in scale-up/scale-out for non-NVIDIA accelerators (custom ASICs, TPUs, inference chips).

Systems vendors are reaching into AI back-end networks, and it's not just Arista's story — the same quarter Ciena won the industry's first multi-rail order. For a fuller picture, see Earnings Call Highlights: Ciena (CIEN) Q2 FY26 — A Systems Vendor Officially Breaks Into AI Back-End Networks. For scale-up, a battleground Arista says less about, the latest standards fight is covered in What Is XPO? The Loudest New Scale-Up Standard at OFC 2026.

6. Conclusion

This quarter Arista lit up both the AI narrative and the core-business recovery, and unusually spoke louder about the latter. Between next quarter and year-end, three indicators are worth watching: first, whether core data center front-end growth really turns from flat to up — a flag management planted itself this quarter; second, whether gross margin can hold at 62–64%, since a higher international and large-customer share will keep pressuring mix, along with pricing and shortage costs that only show up in the second half; third, whether a third 10%-class customer actually emerges, with the Anthropic webinar the most direct window. In one sentence: this isn't a report propped up by AI, but a quarter in which Arista converted supply chain execution into a third full-year raise — the real test is whether it can keep outrunning everyone in an industry facing two more years of shortages.