Arista (ANET): First $3B Quarter, 45% Margins — Our Call Is AVOID. Is ANET Stock a Buy?

Arista Networks, Inc. (ANET) Q2 2026 — Reported Aug 4, 2026 AFTER the close for calendar Q2 2026 (quarter ended June 30). Revenue $3,035.7M, +37.7% YoY, vs ~$2.83B expected - a 7.3% beat and its first $3B quarter. Non-GAAP EPS $1.02 vs $0.89 (+14.6%), up 39.7%. GAAP EPS $0.95 vs $0.70. GAAP operating margin 45.4%, a five-quarter high. Q3 guide ~$3.3B, EPS $1.06-$1.08. ANET closed $190.51, a 52-week closing high - BEFORE the print. Arista beat revenue by 7%, earnings by 15%, and beat its OWN May guidance by 8.4% (vs 4.2% last quarter). Operating margin hit a five-quarter high of 45.4% even though gross margin FELL 232bp, because opex leverage beat mix loss. But at $190.51 the enterprise is $229.7B against ~$4.46B of 2026 owner earnings - 51.6x, a 1.9% cash yield, and zero of the nine cells in our grid reach the price. THE CALL: AVOID (4/5, AN ELITE BUSINESS AT AN IMPOSSIBLE PRICE) — base-case value ~$105.0 vs ~$190.51 today. KEY METRICS: - CALL: AVOID 4/5, fair value ~$105 vs $190.51 - about 45% BELOW the price. Ten-year owner-earnings DCF: FY2026E revenue ~$12.55B (H1 $5,744.7M + Q3 guide $3.3B + our $3.5B Q4) x the 44.1% GAAP operating margin H1 delivered, less the 19.4% tax paid = ~$4.46B of owner earnings, compounding 25% fading to 6% by 2035 ($41.8B), margin 35.5% to 30.5%, 10.5% discount rate (beta 1.615), 3.5% terminal. Enterprise $118.4B; ADD $13.34B net cash (zero debt) over 1,276.0M diluted shares = $103. Grid at 9.5/10.5/11.5%: bear $75/$66/$60, base $120/$103/$90, bull $184/$154/$132. ZERO of nine cells reach the price. - REVERSE DCF: $190.51 x 1,276.0M = $243.1B equity, less $13.34B net cash = a $229.7B enterprise - 51.6x the ~$4.46B of 2026E owner earnings, a 1.9% cash yield. Solve for the growth that closes the gap at 10.5% and you need revenue compounding 43% next year fading to 11%: about $90B of revenue in 2035, ~1.5x Cisco's entire $56.7B today. Trailing GAAP P/E 60x; forward non-GAAP ~46x. - THE BEAT NOBODY FRAMED: consensus was $0.89 EPS / ~$2.83B revenue, and Arista's OWN May guide was ~$2.8B. It delivered $3,035.7M - beating its own guide by 8.4%, double the 4.2% guide-beat in Q1. Revenue accelerated five straight quarters: $2,204.8M, $2,308.3M, $2,487.8M, $2,709.0M, $3,035.7M (+19%, +27%, +29%, +35%, +38% YoY). - WHAT THE HEADLINE HIDES: GAAP gross margin 62.9% vs 65.2% (-232bp) as the AI mix dilutes price, yet operating margin ROSE to 45.4% because opex leverage (299bp) beat it. H1 operating cash flow $2,776.5M less $84.2M capex = $2,692.3M FCF - but $1,493.5M (55%) was the deferred-revenue build, i.e. customer prepayment; ex-that, H1 cash was ~$1,199M vs $2,235.8M of net income. Buybacks: $0 vs $983.0M a year ago. - THE STALE FY GUIDE: the May full-year guide was $11.5B and Tuesday's release updated only Q3. H1 $5,744.7M + Q3 guide $3,300M = $9,044.7M, so $11.5B implies a Q4 of $2,455M - a 26% sequential COLLAPSE, below Q4 2025's $2,487.8M. It has to go up; our arithmetic says ~$12.5B. Deferred revenue +27.8% in six months to $6,865.9M. Cash + securities $13.34B, ZERO debt. - STREET: 52 analysts - 39 buy, 13 hold, 0 sell; consensus Buy, average target $192.31 (range $164-$220), only ~1% above the price. We DIFFER and are far more CAUTIOUS on the price while AGREEING on the business. What to watch: Changes our mind UP: gross margin stabilising above 63% for two straight quarters with growth above 30%. Confirms the bear: gross margin below 62%, the deferred-revenue build reversing, or a hyperscaler disclosing a material in-house fabric move. Hard rule: Q3 revenue under the $3.3B guide and we go to a full SELL. We would start buying under $120 (the March low was $116.13). Also on YouTube: @ChargedAlpha DISCLAIMER: For informational and educational purposes only. Not financial advice. Do your own research before any investment decision.