Form 4: Zscaler CPO Sells Shares Under Tax & 10b5-1 Plans

Zscaler's Chief Product Officer, Adam Geller, reported sales of common stock totaling 3,680 shares, primarily for tax obligations and a pre-arranged trading plan.

Summary

• Adam Geller, Zscaler's Chief Product Officer, reported two sales of Zscaler common stock.
• On December 16, 2025, Geller sold 2,060 shares at a price of $230.8193 per share. This sale was to cover tax withholding obligations related to the vesting of restricted stock units and was not a discretionary trade.
• On December 17, 2025, Geller sold an additional 1,620 shares at a price of $232.79 per share. This transaction was executed pursuant to a Rule 10b5-1 trading plan adopted on March 12, 2025.
• Following the December 16, 2025 transaction, Geller beneficially owned 52,148 shares of common stock.
• Following the December 17, 2025 transaction, Geller beneficially owned 50,528 shares of common stock.

Sentiment

Score: 5

Explanation: The sentiment is neutral. The reported sales are non-discretionary, driven by tax obligations from RSU vesting and a pre-established 10b5-1 trading plan. These types of insider sales are routine and generally do not indicate a change in management's outlook on the company's future performance.

Positives

• NA

Negatives

• The sales represent a reduction in direct beneficial ownership by a key executive, though the reasons cited (tax withholding and a pre-arranged 10b5-1 plan) suggest these were non-discretionary and routine.

Risks

• NA

Future Outlook

NA

Industry Context

This Form 4 filing is a routine disclosure of insider stock transactions and does not provide information directly related to broader industry trends or competitive positioning. Such filings are common across all publicly traded companies when executives exercise and sell equity awards or execute pre-planned trading strategies.

Comparison to Industry Standards

• NA

Related Party Transactions

• Adam Geller, Chief Product Officer of Zscaler, Inc., engaged in sales of Zscaler common stock. These are considered related party transactions due to his executive position.

Stakeholder Impact

• Shareholders: The impact is minimal as these are routine, non-discretionary sales by an executive, not indicative of a change in company fundamentals or a lack of confidence.
• Employees: No direct impact on employees is indicated by this filing.
• Customers/Suppliers/Creditors: No direct impact on these stakeholders is indicated by this filing.

Next Steps

• NA

Key Dates

Recommendation

The reported insider sales by Zscaler's Chief Product Officer, Adam Geller, are primarily for tax withholding obligations and pursuant to a pre-arranged Rule 10b5-1 trading plan. These are considered routine, non-discretionary transactions and typically do not signal a change in the company's fundamental outlook or warrant a shift in investment thesis. Therefore, a 'hold' recommendation is appropriate, as this filing alone does not provide new information to alter an existing investment stance.

Keywords

Zscaler, ZS, Adam Geller, Chief Product Officer, Insider Trading, Form 4, Stock Sale, 10b5-1 Plan, Restricted Stock Units, Tax Withholding