Arista Networks CTO Kenneth Duda Completes Significant Stock Option Exercises and Share Sales Under 10b5-1 Plans

Stock Option Exercise and Direct Share Ownership

On July 20, 2026, Kenneth Duda exercised 17,333 non-qualified stock options at a strike price of $15.2769 per share. Post-exercise, he held 30,309 shares of Arista Networks common stock directly. These options vest monthly, starting December 1, 2020, with one forty-eighth of the shares vesting each month, a common equity compensation structure for senior technology executives in networking and semiconductor sectors.

The large gap between the option strike price and the market prices at which shares were sold highlights the substantial appreciation in Arista Networks stock value. This exercise reflects a key part of Duda’s executive compensation and aligns with typical option management practices among technology leaders.

Strategic Share Sales at Multiple Price Levels

Duda sold shares in four separate transactions on July 20, 2026, with prices ranging from $169.28 to $172.40 per share. The initial tranche sold 6,567 shares at an average price of $169.8977, reducing direct holdings to 23,742 shares. The second tranche involved 9,028 shares sold at an average price of $170.7267, lowering holdings to 14,714 shares. These sales demonstrate a tactical portfolio management approach across different price points during the trading day.

The final two tranches included 1,698 shares sold at $171.7198 average price and 40 shares at $172.40. After all direct sales, Duda retained beneficial ownership of 12,976 shares. These transactions were executed under a Rule 10b5-1 trading plan initiated on March 11, 2026, providing regulatory safeguards for pre-planned insider trades.

Children's Trust Share Sales and Portfolio Management

Parallel share sales occurred through trusts established for Duda's children, where he acts as co-trustee. The trusts sold 6,062 shares at an average price of $169.8977, 8,334 shares at $170.7267, 1,567 shares at $171.7198, and 37 shares at $172.40. Post-sale, these trusts held 1,031,168 shares of Arista Networks stock indirectly. While Duda shares voting and investment control as co-trustee, he disclaims beneficial ownership of these trust assets.

The synchronized timing and pricing of these sales alongside Duda’s direct transactions indicate a coordinated portfolio diversification strategy across multiple legal entities. These sales also followed the Rule 10b5-1 plan established in March 2026 specifically for the children’s trusts, exemplifying how senior executives manage family equity holdings while adhering to insider trading regulations.

Charitable Foundation’s Share Sales and Rebalancing

A 501(c) charitable foundation, co-trusteed by Duda and his spouse, sold a total of 9,998 shares on July 20, 2026. The foundation’s sales included 3,789 shares at $169.8977 average price, 5,209 shares at $170.7267, 979 shares at $171.7198, and 23 shares at $172.40. Following these transactions, the foundation retained 462,400 shares. These sales were conducted under a Rule 10b5-1 trading plan established March 11, 2026.

The foundation’s share sales represent a deliberate portfolio rebalancing consistent with typical investment policies for charitable entities, aiming to diversify holdings while supporting grant-making activities. The remaining substantial stake indicates continued confidence in Arista Networks alongside strategic diversification.

Additional Trust Holdings and Estate Planning Structures

Duda holds indirect beneficial ownership of 757,755 shares through a Grantor Retained Annuity Trust (GRAT) managed by his spouse as trustee. He also serves as trustee of another GRAT holding 756,272 shares. These trusts are common wealth management and estate planning tools for high-net-worth individuals.

Additionally, a family trust co-trusteed by Duda holds 106,890 shares. Combined with his direct holdings, children’s trusts, and foundation shares, these entities illustrate the complex, multi-entity ownership typical of senior executives, facilitating wealth management, charitable giving, and succession planning while ensuring transparent disclosure of beneficial ownership.

Compliance via Rule 10b5-1 Trading Plans

All transactions executed by Duda on July 20, 2026, were pursuant to Rule 10b5-1 trading plans established March 11, 2026. These plans provide an affirmative defense against insider trading allegations by allowing pre-scheduled trades when the officer likely lacked material nonpublic information. The plans enabled Duda to implement a disciplined diversification strategy under regulatory protection.

Separate Rule 10b5-1 plans were created for Duda’s direct trades, children’s trusts, and the charitable foundation, illustrating best practices in insider compliance. The four-month gap between plan establishment and trade execution reflects the necessary advance planning to meet SEC regulations.

Transaction Pricing and Market Execution Details

Shares sold on July 20, 2026, ranged from approximately $169 to $172 per share, with weighted average prices varying by transaction tranche. The first tranche sold shares between $169.28 and $170.27, the second between $170.28 and $171.21, the third between $171.33 and $172.31, and the fourth at $172.40. This price progression suggests trades were executed throughout regular market hours to optimize execution prices.

In total, about 68,000 shares were sold across Duda’s direct and trust holdings. Although the filing did not disclose total transaction proceeds, investors can estimate aggregate values based on disclosed prices and quantities. The multi-price point execution and weighted average pricing reflect a professional approach to portfolio rebalancing by a senior technology executive.

Arista Networks Overview and Executive Leadership Role

Arista Networks provides cloud networking solutions and software-driven products for enterprise data centers, cloud providers, and service providers, focusing on high-performance scalable infrastructure. Kenneth Duda, as President and CTO, directs technical strategy and product development, placing him among the company’s top leadership. His securities transactions are subject to stringent regulatory disclosure and scrutiny.

Duda’s combined direct and trust holdings total millions of shares, demonstrating strong confidence in Arista Networks’ long-term prospects. Despite the July sales, he and related entities retained beneficial ownership of approximately 3.7 million shares, indicating these transactions represent portfolio rebalancing rather than a reduction in commitment to the company.

Regulatory Disclosure and Ongoing Reporting Requirements

The July 22, 2026 filing fulfills Duda’s obligation to report beneficial ownership changes within two business days under Section 16(a) of the Securities Exchange Act of 1934. The filing was signed by Isabelle Bertin-Bailly, Attorney-in-Fact for Duda, reflecting delegated authority to legal counsel for executing and filing regulatory documents, a common practice among executives managing complex portfolios.

Duda remains subject to Section 16 reporting requirements, mandating prompt public disclosure of future transactions in Arista Networks securities. Investors can monitor these filings via the SEC’s EDGAR database to track insider activity and assess management’s perspective on company valuation and capital allocation.