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Arista Networks builds the Ethernet switches and EOS software that keep hyperscale data centers moving at terabit speed—yet its regulatory disclosures hold details just as critical as its technology. From customer concentration in cloud giants to the cadence of new product releases, Arista Networks SEC filings reveal the data networking story behind the numbers.
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Jayshree Ullal, who serves as CEO and Chairperson of Arista Networks (ANET), reported multiple sales of Arista common stock executed on 08/08/2025 under a Rule 10b5-1 trading plan established on December 13, 2024. The filing lists sales of 26,625 shares (two separate lines) and 139,729 shares at a weighted average price of $139.6707, with transaction prices ranging from $139.50 to $140.00.
The Form 4 shows large amounts of stock held in trusts for family beneficiaries: trusts for two children are listed with 5,623,721 shares each on related lines and a family trust with 20,508,982 shares; the reporting person is trustee or co-trustee, shares voting and investment control for those trusts, but disclaims beneficial ownership. Smaller trust allocations of 30,000 shares are reported for a nephew and a niece. The sales were executed pursuant to the pre-established Rule 10b5-1 plan disclosed in the filing.
Jayshree Ullal, identified as CEO and Chairperson of Arista Networks (ANET), reported multiple sales of company common stock with a transaction date of 08/07/2025. The Form 4 discloses sales executed under a Rule 10b5-1 trading plan adopted December 13, 2024. The filing shows at least 355,773 shares sold across several entries, with weighted-average prices reported at $139.7422 and $140.606 and stated price ranges of $139.50–$140.495 and $140.50–$141.00.
The sales relate largely to shares held in various trusts for relatives for which the reporting person serves as trustee or co-trustee; the filing states the reporting person disclaims beneficial ownership of those trust shares. Post-transaction beneficial-ownership figures are reported for trusts (for example, ~20.6 million and ~5.66 million shares in listed trusts) and a small direct holding is shown. All transactions are disclosed as pursuant to the pre-existing 10b5-1 plan.
Jayshree Ullal, Arista Networks' CEO, Chairperson and director, reported a series of reported sales of Arista common stock executed on 08/06/2025 under a Rule 10b5-1 trading plan adopted December 13, 2024. The Form 4 shows multiple blocks sold from family trusts and trusts for her children and relatives, totaling 1,785,165 shares disposed across the reported transactions. Prices for the various blocks are reported as weighted averages spanning roughly $134.10 to $139.53. The filing discloses that Ullal serves as trustee or co-trustee, shares voting and investment control, but disclaims beneficial ownership of shares held in those trusts. After the transactions the filing shows large indirect holdings remain: the family trust holds about 20,899,111 shares and the child trusts about 5,698,074 shares each, with additional 30,000-share trusts for a nephew and niece.
Arista Networks (ANET) – Form 144 filing. Multiple insider-affiliated entities, led by the Ullal family, have filed a notice to sell up to 1,682,632 common shares (≈0.13 % of the 1,255,921,431 shares outstanding) through J.P. Morgan Securities. The aggregate market value of the proposed sale is $225.1 million; the brokered sales are expected to begin on 06 Aug 2025 on the NYSE.
The filing also discloses extensive selling activity during the past three months:
- Tarini & Adeeti Ullal Trusts: each sold 438,795 shares
- Ishan & Shriya Nagpal Trusts: each sold 10,000 shares
- Jayshree Ullal (CEO): 106,766 shares
- 2000 Ullal Family Trust: multiple transactions including several large blocks
Rule 144 & 10b5-1 representations are included, affirming no undisclosed material information. While the sale is relatively small versus total float, concentration among key insiders may draw investor attention to future governance and supply-demand dynamics.
Arista Networks (ANET) has filed a Form 144 signaling intent to dispose of 320,684 common shares via J.P. Morgan Securities on 6 Aug 2025. The shares, acquired through a stock-option exercise on 1 Jan 2013, are valued at an aggregate $42.9 million. The form lists 1.26 billion shares outstanding and affirms the seller’s lack of undisclosed adverse information.
Rule 144 also requires disclosure of recent insider sales. The filing details multiple transactions from 26 Jun – 31 Jul 2025 by parties affiliated with CEO Jayshree Ullal, including the Tarini Ullal, Adeeti Ullal, Ishan Nagpal, Shriya Nagpal and 2000 Ullal Family trusts. Reported trades range from 20 to 50.7 million shares in single-day lots, generating gross proceeds of up to $79.5 million. These sales, alongside the new proposed sale, indicate continued insider liquidity activity over the past quarter.
Arista Networks (ANET) – Form 4 filed 05 Aug 2025
Director Charles H. Giancarlo reported the sale of 8,000 common shares on 01 Aug 2025 under a pre-arranged Rule 10b5-1 plan adopted 14 Jun 2024. The shares were disposed of in three open-market transactions at weighted-average prices of $116.09, $116.98 and $117.96, for aggregate proceeds of roughly $0.9 million.
Post-sale, Giancarlo continues to hold 219,636 shares directly, 57,784 shares indirectly through a family trust and 50,000 shares via a charitable remainder trust, or about 327 k shares in total. No derivative securities or option exercises were reported, and the filing cites no company-specific events, suggesting the transactions are routine portfolio diversification.
Arista Networks (ANET) – Form 4 insider filing: CEO & Chairperson Jayshree Ullal reported the 30 Jul 2025 disposition of 288,820 common shares held across several family trusts.
- Executed under a pre-arranged Rule 10b5-1 trading plan adopted 13 Dec 2024, signalling the sales were scheduled in advance.
- Weighted-average sale price: $122.19; small lots sold at $123. Aggregate proceeds are roughly $35 million.
- Breakdown: main family trust sold 209,112 shares; each child’s trust sold 39,854 shares.
- Residual stakes remain large: 22.83 m shares in the primary trust and 6.06 m shares in each child’s trust, plus other indirect holdings.
No derivative transactions were disclosed. The filing records routine liquidity/estate-planning activity and does not convey operational or financial guidance.
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