Jayshree Ullal Sells $135M of ANET in 72 Hours: 17.8M Shares Left

Across three consecutive trading days in April 2026, Jayshree Ullal, the CEO of Arista Networks, executed roughly $135 million of open-market sales of ANET common stock. The aggregate breaks down as 260,219 shares on April 20 (approximately $43.5M), 93,861 shares on April 21 ($15.8M), and 428,000 shares on April 22 ($75.9M). Lot sizes ranged from 219 shares to 36,685 shares, with executions clearing at multiple distinct price points between $167.64 and $170.51 per share.

The Form 4 balance after the April 22 disposal: 17,782,010 ANET shares remaining. The mistake retail readers make on filings of this size is to read the dollar value out of context. Ullal's residual position is more than 130x the size of the April sales. At current trading levels, that residual is worth more than $3 billion. The relevant question is therefore not whether she is "selling" — over 20 years as CEO and co-founder she has been a consistent net seller — but whether the April execution mechanics point to discretionary view or scheduled plan.

The transaction pattern reads as plan-driven

The structural fingerprint of the April 20-22 sales matches Rule 10b5-1 plan execution almost exactly. Twenty separate transactions, distributed across three consecutive days, clearing at four to five distinct limit prices on each day, with lot sizes that range from sub-300 shares to mid-five-figure shares. Discretionary sales by senior insiders cluster — they happen at one or two reference prices on one or two days. Plan-driven sales fragment across price bands and lot sizes because the trading algorithm is given price-improvement instructions and broken-up shares to execute over a window.

The April 22 cluster (6 transactions, 428,000 shares, $75.94M) is the largest single-day block. The exact pattern — repeating large round-number share lots paired with smaller leftover lots at the same price points — is the signature of a 10b5-1 plan with a daily share cap and a price-improvement algorithm that completes the cap from multiple inventory pools. This is not a CEO calling her broker and saying "sell $75M today."

What the residual position implies for ownership read

17.78M shares is a substantial founder-CEO position. Compared against ANET's institutional holder base, Ullal's remaining direct stake sits well above any single institutional 13F position in dollar value. The top six 13F institutional holders, with their dollar values, character, and any flags:

Filer	Reported value	Position character
BlackRock, Inc.	$12.5B	Index-led across iShares S&P 500 weight
VANGUARD CAPITAL MANAGEMENT LLC	$8.4B	Passive index sleeve
STATE STREET CORP	$6.2B	Custodial + SPDR index
FMR LLC	$5.1B	Fidelity mixed active/index
Geode Capital Management	$3.5B	Passive index (filerType: passive_index)
Cresset Asset Management	$2.7B	Active wealth manager

The top five disclosed positions are dominated by mechanical S&P 500-weight ownership. Geode is explicitly tagged as a passive index fund in our database, and BlackRock, Vanguard, and State Street's positions are almost entirely index-driven rather than discretionary. The first active discretionary name in the top six is Cresset Asset Management at $2.7B — and even Cresset is structured more as a registered wealth manager than a fundamental hedge fund.

This matters for the read on Ullal's sales. There is no large active discretionary 13F position in ANET that would view the CEO's April 22 cluster as a directional signal in either direction. The trade is too small relative to Ullal's residual stake to alarm a fundamental holder; it is too programmatic in mechanics to be read as a view by a momentum holder. The dollar headline ($135M in three days) makes the trade visible to the broader retail community without giving the active institutional base a reason to reposition.

Ullal's history of programmatic selling

Looking across Ullal's full Form 4 trading history, the April 2026 sales are consistent with a multi-year pattern. The cumulative gross sale value over Ullal's CEO tenure is approximately $2.2 billion against essentially no open-market purchases, but her shares-after-each-filing have ratcheted down from a peak near 30M to the current 17.78M over roughly a decade. That's a measured 40% reduction in direct ownership across 10 years — consistent with annual or semi-annual plan refreshes that liquidate a stable percentage of holdings rather than chase price levels.

The 13G/A filing history corroborates this. Ullal has not been listed as a 5%+ beneficial owner in any of the recent 13G filings (BlackRock, Vanguard, FMR's standard passive 5% disclosures), meaning her direct stake has been below the 5% reporting threshold throughout the post-IPO period. The combination of "below 5% reporting threshold + 17.78M shares + consistent programmatic sales" puts her in the standard founder-CEO governance category, not the controlling-shareholder category.

What to watch over the next 90 days

• 2026Q1 13F filing (mid-May): Whether Cresset's $2.7B position or FMR LLC's $5.1B position shows a meaningful trim. Either move would be the cleanest signal that active institutional conviction is fading; a hold or add would suggest the April sales are mechanical, as the transaction pattern itself indicates.
• ANET Q2 2026 earnings (early August): Arista typically pre-announces hyperscaler cloud capex commentary alongside results. Insider trading windows reopen within the standard 48-hour post-earnings window, so any non-programmatic Ullal activity in August would be more diagnostic than the April pattern.
• Co-founder Andy Bechtolsheim's filings: Bechtolsheim is the larger of ANET's two founder-level holders by direct stake. Coordinated selling between Ullal and Bechtolsheim would change the read materially; uncoordinated selling reinforces the plan-driven interpretation.

The structural answer to the title's implicit question — is $135M in three days a bearish signal? — is "no, on the available mechanics." Every diagnostic from the lot-size distribution to the price-band scatter to Ullal's lifetime pattern points to a Rule 10b5-1 plan execution. The view question, if there is one, gets answered by the 2026Q1 13F filings from Cresset and the other active institutional names. Cross-reference the underlying Form 4s at SEC accession CIK 0001605809 on EDGAR, and see Ullal's career sales pattern for the multi-year context.

For broader context, the full ANET institutional holder base spans the index-led mega-platforms with active conviction surfacing only inside the top 20. The explainer library covers reading Form 4 codes and identifying 10b5-1 plan executions for retail investors trying to filter signal from noise.