Form 4: FormFactor CEO Mike Slessor Executes Planned Stock Sale

FormFactor CEO Mike Slessor sold 9,438 shares of common stock on May 13, 2026, pursuant to a pre-established Rule 10b5-1 trading plan.

Summary

• CEO Mike Slessor sold a total of 9,438 shares of FormFactor common stock.
• The transactions occurred on May 13, 2026, at weighted average prices ranging from $122.84 to $136.15 per share.
• Following these transactions, the CEO retains beneficial ownership of 447,037 shares.
• All sales were executed automatically under a Rule 10b5-1 trading plan adopted on August 19, 2025.

Sentiment

Score: 5

Explanation: StockSavvy.ai views this as a neutral event, as the sale was executed under a pre-existing, automated trading plan and does not reflect a change in management's outlook on the company.

Positives

• The sale was conducted under a pre-arranged Rule 10b5-1 plan, indicating the transaction was not based on non-public information or sudden market sentiment.

Negatives

• The transaction represents a reduction in the CEO's direct equity stake in the company.

Risks

• Insider selling can sometimes be perceived negatively by retail investors, regardless of the existence of a pre-planned trading program.

Future Outlook

No specific forward-looking guidance regarding company operations was provided in this filing.

Industry Context

StockSavvy.ai notes that routine insider selling via 10b5-1 plans is a standard practice for executives to manage personal liquidity and is generally viewed as neutral by institutional investors.

Comparison to Industry Standards

• The use of Rule 10b5-1 plans is the industry standard for corporate executives to avoid potential conflicts of interest regarding insider trading regulations.

Stakeholder Impact

• Minimal impact expected as the sale was pre-planned and represents a small fraction of the CEO's total holdings.

Key Dates

Keywords

FormFactor, FORM, Insider Trading, Form 4, Mike Slessor, Stock Sale, Rule 10b5-1