Arista Networks gained $34 billion in market cap this week, but the numbers come with a caveat.
Arista Networks, Inc. NYSE:ANET ended Friday at $186.96, up 16.9% from July 2. That price lifts its market cap to $238.1 billion, an increase of about $34.4 billion, assuming no change in share count. That gain is nearly three times Arista’s forecast for 2026 revenue, which stands at $11.5 billion. U.S. markets did not open Saturday.
The odd thing is what didn’t budge. FactSet’s 2026 EPS estimate stays at $3.63, same as a month back. The Street’s average price target is $190.30, just 1.8% higher than Friday’s close. Arista only put out one press release this week, and it was July 7 with the Q2 earnings date—no change to the outlook.
The comparison points to a move that’s more about Arista getting rerated than a broad shift in networking:
| Week ended July 10 | July 2 close | July 10 close | Change |
|---|---|---|---|
| Arista Networks | $159.99 | $186.96 | +16.9% |
| Cisco Systems, Inc. NASDAQ:CSCO | $112.69 | $121.31 | +7.6% |
| Nasdaq Composite | 25,832.67 | 26,281.61 | +1.7% |
| S&P 500 | 7,483.24 | 7,575.39 | +1.2% |
Arista shares outperformed Cisco this week, beating its gain by roughly 9.2 points. Arista also led the Nasdaq by about 15.1 points for the period between July 2 and July 10, based on closing prices.
Arista’s late move didn’t draw big volume. About 5.5 million shares traded Friday, well below the 50-day average of 10.4 million. The stock booked its third gain in a row and closed 1.5% under Thursday’s 52-week high. The rally came on light volume, so there’s less proof of strong buying at these levels.
The price-to-earnings ratio, or P/E, gives a read on what investors spend for every dollar of yearly earnings. Based on Friday’s close, unchanged FactSet estimates, and Arista’s current revenue view, the stock is now valued as follows:
| Valuation check | Result |
|---|---|
| Market cap to 2026 revenue forecast | 20.7 times |
| Stock price over 2026 EPS estimate | 51.5 times |
| Stock price over 2027 EPS estimate | 42.0 times |
| Gap to consensus analyst price target | 1.8% |
The multiple on the stock jumped, but near-term earnings didn’t move. That puts pressure on the Aug. 4 results—just hitting the forecast might not be enough for questions around valuation.
Arista’s latest quarterly filing shows a big stack of supply obligations. As of March 31, the company had $8.9 billion in non-cancellable purchase commitments, with $7.6 billion due inside a year. That’s 77% of its full-year revenue target. The filing also listed $7.7 billion in expected revenue from deferred revenue and other contract obligations—about 67% of the same outlook—91% of which is coming in the next two years. Deferred revenue is billed or collected up front, but accounting rules don’t let it hit sales yet. The two numbers aren’t apples to apples, but together, they show what Arista’s up against.
Management calls it a supply race. CEO Jayshree Ullal said in May that Arista was “uniquely positioned” for AI networking. CFO Chantelle Breithaupt called the “macro and supply chain environments” still “dynamic.” Morgan Stanley NYSE:MS analyst Meta Marshall called Arista “one of the cleanest ways to own the AI networking cycle,” saying the real question was how much supply Arista could get, not demand. Arista Networks
But the bet on supply can flip the other way if AI rollouts lose steam, if buyers hold off on new gear, or if part costs don’t drop. Arista flagged risk from stuck inventory and non-cancellable orders, which could pressure gross margin. Gross margin slipped to 61.9% in Q1, down from 63.7% last year. Cisco and NVIDIA Corporation NASDAQ:NVDA also play in networking. Arista said its AI Ethernet gear still hasn’t seen wide adoption against InfiniBand or other Ethernet players.
Markets are eyeing next week’s macro test, with the June U.S. consumer-price report set for Tuesday, July 14 at 8:30 a.m. EDT. A stronger inflation print could push bond yields up and hit tech shares trading at high valuations. Arista’s next big event comes after the bell on Aug. 4. The company is projecting about $2.8 billion in Q2 revenue, with an adjusted operating margin between 46% and 47%, and adjusted EPS near 88 cents. These adjusted numbers strip out stock comp and amortization of acquired intangibles.
FactSet’s Q2 estimate stays at 88 cents, unchanged for a month. The consensus price target is almost hit, so investors will want more than just an in-line quarter. They’re looking for proof that Arista’s hefty supply book is driving sales and not leading to another margin dip.
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