FormFactor (NASDAQ: FORM) CEO sells 11,098 shares in planned trade

What happened

FormFactor Inc. (NASDAQ: FORM) CEO and director Mike Slessor sold 11,098 shares on 2026-10-14, according to the filing. The shares were common stock and sold at prices from $124.23 to $125.92 per share. The sale brought in about $1.39 million. After the trades, Slessor held 455,596 shares. The form lists the shares as direct ownership and identifies Slessor as both a director and officer with the title CEO.

The filing breaks the sale into three parts. It shows 2,195 shares at a weighted average $124.23, 7,703 shares at $125.36 and 1,200 shares at $125.92. The first reported sale left 464,499 shares, the second left 456,796 and the third left 455,596. Each line uses transaction code S. The price ranges were $123.87 through $124.86, $124.90 through $125.805 and $125.855 through $125.98.

The filing says the trades were made under a Rule 10b5-1 trading plan adopted on August 19, 2025. The report was filed by one reporting person and signed on 2026-10-14 by attorney-in-fact Stan Finkelstein. The filing's figures imply a 466,694-share stake before the sale. The 11,098 shares were 2.4% of that pre-trade holding.

Key numbers

Metric	Latest	Change	Source
Shares sold	11,098 shares		SEC Form 4
Sale proceeds	about $1.39 million		SEC Form 4
Post-sale holding	455,596 shares		SEC Form 4
Sale price range	$124.23 to $125.92 per share		SEC Form 4
Shares sold as share of pre-trade holding	2.4%		Calculated from SEC Form 4

Read more: FormFactor (FORM) stock analysis and investment case

Why it matters

OptimistFi's case is that FormFactor can create value if wafer-level testing stays mission-critical. This filing adds an ownership data point, not a business update. The 11,098 shares were 2.4% of the 466,694 shares held before the trade, but the Rule 10b5-1 plan adopted on August 19, 2025 limits how much the sale says about discretion.

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What's next

FormFactor's next quarterly report is the next scheduled test of whether testing demand turns into operating leverage. Stronger margins would support OptimistFi's case. Another period of only cyclical revenue would weaken it. Until that report, the Form 4 mainly adds a new insider-ownership marker.

The preset trading plan means the sale followed a schedule set earlier, not a same-day judgment. That makes the next report more important than another routine Form 4 for judging the stock's operating case. If the report shows better margin conversion, the case improves.

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