Arista Networks President and CTO Kenneth Duda Executes Major Stock Sales and Option Exercises

Option Exercise and Direct Share Acquisitions

Kenneth Duda exercised 17,333 non-qualified stock options on July 20, 2026, at a strike price of $15.2769 per share. Following this exercise, Duda held 30,309 shares of Arista Networks common stock in direct ownership. The options are subject to a monthly vesting schedule that commenced on December 1, 2020, with one forty-eighth of the shares vesting each month thereafter. This vesting structure is typical of equity compensation arrangements for senior technology executives in the networking and semiconductor industries.

The substantial difference between the option strike price and the market prices at which Duda subsequently sold shares reflects the appreciated value of Arista Networks stock over the holding period. The exercise of these options represents a significant component of executive compensation realization and is consistent with established patterns of option management among technology company officers.

Systematic Share Dispositions Across Multiple Price Points

Duda sold shares in four separate transactions on July 20, 2026, with prices ranging progressively from $169.28 to $172.40 per share. The first tranche involved the sale of 6,567 shares at a weighted average price of $169.8977, reducing his direct holdings to 23,742 shares. The second transaction comprised 9,028 shares sold at a weighted average price of $170.7267, bringing direct holdings to 14,714 shares. These sales reflect a tactical approach to portfolio management, with execution across different price levels during the trading day.

The third and fourth tranches involved smaller volume sales, with 1,698 shares sold at a weighted average price of $171.7198 and 40 shares sold at $172.40. Following all direct sales, Duda maintained direct beneficial ownership of 12,976 shares of Arista Networks common stock. The disclosure states that these sales were effected pursuant to a Rule 10b5-1 trading plan entered into on March 11, 2026, which provides regulatory protection for officer transactions executed under pre-arranged conditions.

Children's Trust Portfolio Rebalancing

Duda executed parallel share sales through trusts established for the benefit of his children, for which he serves as co-trustee. These transactions involved the sale of 6,062 shares at $169.8977 (weighted average), 8,334 shares at $170.7267 (weighted average), 1,567 shares at $171.7198 (weighted average), and 37 shares at $172.40. Following these dispositions, the children's trusts retained beneficial ownership of 1,031,168 shares of Arista Networks common stock held indirectly through the trust vehicles. The disclosure notes that while Duda shares voting and investment control over these shares as co-trustee, he disclaims beneficial ownership of the assets held in the children's trusts.

The coordinated timing and pricing structure of the children's trust sales with Duda's direct sales suggests a unified portfolio management strategy implemented across multiple legal entities. These transactions were also executed pursuant to the Rule 10b5-1 trading plan established on March 11, 2026, specifically for the benefit of the reporting person's children. This arrangement demonstrates how senior executives often structure equity diversification across family entities while maintaining compliance with insider trading regulations.

Charitable Foundation Share Reduction Strategy

A 501(c) charitable foundation for which Duda and his spouse serve as co-trustees executed share sales totaling 9,998 shares on July 20, 2026. The foundation sold 3,789 shares at a weighted average price of $169.8977, 5,209 shares at $170.7267 (weighted average), 979 shares at $171.7198 (weighted average), and 23 shares at $172.40. Following these transactions, the foundation retained beneficial ownership of 462,400 shares of Arista Networks common stock. These sales were effected pursuant to a Rule 10b5-1 trading plan entered into on March 11, 2026, by the foundation.

The foundation's share sales represent a deliberate portfolio rebalancing by the charitable entity, which may reflect investment policy changes or strategic decisions regarding the foundation's holdings in Arista Networks. Charitable foundations typically maintain diversified investment portfolios to support their grant-making activities, and periodic rebalancing is a standard practice. The substantial remaining position of 462,400 shares indicates the foundation maintains a significant stake in the company while achieving greater portfolio diversification through the July transactions.

Grantor Retained Annuity Trust Holdings and Family Trust Positions

The disclosure reveals additional indirect beneficial ownership positions held through specialized trust structures. Duda maintains beneficial ownership of 757,755 shares held indirectly through a GRAT (Grantor Retained Annuity Trust) for which the reporting person's spouse serves as trustee. Additionally, Duda is the trustee of a separate GRAT that holds 756,272 shares of Arista Networks common stock. These structures represent long-term wealth management and estate planning arrangements commonly employed by high-net-worth executives.

A separate family trust for which Duda serves as co-trustee holds an additional 106,890 shares. Combined with the direct holdings, children's trust positions, and foundation shares, these various entities demonstrate the complex ownership structure typical of senior executives at major technology companies. The use of multiple trust vehicles provides flexibility for personal wealth management, charitable giving, and family succession planning while maintaining clear disclosure of beneficial ownership and control relationships to regulators and shareholders.

Rule 10b5-1 Trading Plan Compliance Framework

All share transactions executed by Duda on July 20, 2026, were conducted pursuant to Rule 10b5-1 trading plans established on March 11, 2026. Rule 10b5-1 plans provide an affirmative defense against insider trading liability by allowing officers, directors, and others with access to material nonpublic information to establish predetermined trading schedules in advance. The plan structure enables Duda to execute a disciplined portfolio diversification strategy while operating under regulatory protections that acknowledge the trading was planned when the officer may not have possessed material nonpublic information.

The disclosure indicates that separate Rule 10b5-1 plans were established for direct transactions by the reporting person, for transactions on behalf of the reporting person's children's trusts, and for the charitable foundation. This compartmentalization of trading plans across multiple legal entities represents best practices in insider compliance management. The four-month interval between plan establishment in March and execution in July demonstrates the advance planning required to implement Rule 10b5-1 arrangements in compliance with Securities and Exchange Commission regulations.

Transaction Pricing and Market Activity

The share sales executed on July 20, 2026, occurred at prices reflecting a range of approximately $169 to $172 per share, with the weighted average prices varying by transaction tranche. The disclosure notes that shares in the first sale group were sold at prices ranging from $169.28 to $170.27, the second group from $170.28 to $171.21, the third group from $171.33 to $172.31, and the fourth group at $172.40. This pricing progression across the trading day suggests that transactions were executed throughout normal market hours to achieve a distribution of execution prices.

The aggregate volume of shares disposed across all direct and indirect transactions reached approximately 68,000 shares across Duda's direct holdings and trust vehicles combined. The company did not disclose the total transaction value in the regulatory update, but investors may calculate approximate aggregate proceeds based on the disclosed weighted average prices and share quantities. The execution strategy across multiple price points and the use of weighted average pricing reflects a professional approach to portfolio rebalancing by a senior technology executive.

Arista Networks Business Context and Executive Role

Arista Networks operates as a provider of cloud networking solutions and software-driven networking products. The company serves enterprise data center networks, cloud providers, and service provider environments with products designed for high-performance, scalable network infrastructure. As President and Chief Technology Officer, Kenneth Duda holds responsibility for the company's technical direction and product development strategy. His position as both director and officer places him among the company's most senior leadership ranks and subjects his securities transactions to heightened regulatory scrutiny and disclosure requirements.

The substantial personal and trust-based holdings disclosed in the filing—totaling millions of shares across various entities—demonstrate significant confidence in Arista Networks' long-term value proposition. Despite the July transactions reducing certain holdings, Duda and entities under his control retained beneficial ownership of approximately 3.7 million shares following the dispositions. This continued substantial position indicates that the July transactions represent portfolio rebalancing and diversification rather than a fundamental reduction in the executive's commitment to the company's success.

Regulatory Disclosure and Future Reporting Obligations

The July 22, 2026 filing represents Duda's regulatory obligation to disclose beneficial ownership changes within two business days of transaction execution, as required under Section 16(a) of the Securities Exchange Act of 1934. The disclosure was signed by Isabelle Bertin-Bailly, identified as Attorney-in-Fact for Kenneth Duda, indicating that the reporting executive had delegated authority to legal counsel to execute and file the required regulatory documentation. This delegation is permitted under Securities and Exchange Commission rules and represents common practice among executives managing complex portfolio structures.

The disclosure confirms that Duda remains subject to Section 16 reporting obligations, meaning that future transactions in Arista Networks securities will continue to be subject to public filing requirements. Officers and directors must file updated Form 4 reports within two business days of any transaction affecting beneficial ownership. Investors and market participants can access these filings through the Securities and Exchange Commission's EDGAR database to track insider transaction activity and assess management's views regarding company valuation and capital allocation priorities.