What happened
Jayshree Ullal, CEO and Chairperson and a director, sold 62,622 shares of Arista Networks, Inc. (NYSE: ANET) on 2026-09-25. The filing puts the sale value at about $13.24 million, based on a weighted average price of $211.3957, which rounds to $211.40. The shares were sold in multiple transactions at prices from $211.00 to $211.79.
After the sale, Ullal held 15,943,854 shares. The filing says the trades were made under a Rule 10b5-1 trading plan entered into on November 14, 2025. The form was filed on 2026-09-29. It also shows 44,726 shares sold in the third transaction, while the first two were 8,948 shares each.
Key numbers
| Metric | Latest | Change | Source |
|---|---|---|---|
| Shares sold | 62,622 shares | SEC Form 4 | |
| Sale price | $211.40 per share | SEC Form 4 | |
| Total sale value | about $13.24 million | SEC Form 4 | |
| Shares held after sale | 15,943,854 shares | SEC Form 4 |
Why it matters
OptimistFi's case is that Arista can compound value if its software-led, high-speed data-center networking platform remains the preferred way for large customers to make data faster, more reliable, and more secure. This filing is mixed for that case. It shows a sale by a top insider, but the sale was prearranged.
OptimistFi's calculation puts the 62,622 shares at about 0.4% of the holding before the trade. That makes the disclosure a small trim, not a large step back.
Ullal still held 15,943,854 shares after the sale. That keeps her as a large holder. It also suggests this was a trim, not a full exit. The stronger caveat is the trading plan, since a prearranged sale can be routine and may say more about timing than conviction. The filing is therefore a limited ownership update, not a new operating signal.
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What's next
The filing date and the November 14, 2025 plan are the only dated markers here. Later Form 4 reports will show whether the plan leads to more sales or whether this filing stands alone.
More sales under the same plan would keep the signal mixed. No further selling would make this disclosure look more like routine activity.
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Sources
- SEC Form 4 — Form 4 filed for Jayshree Ullal on 2026-09-29.
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Originally published on OptimistFi, evidence-first equity research. More at optimistfi.com.
