FormFactor IncCEO sold 17,510 shares (~$1.8M) under a pre-arranged 10b5-1 plan, a routine insider sale with no clear directional signal.

FormFactor CEO Mike Slessor sold 17,510 shares of common stock on Sept. 16, 2026, a transaction valued at approximately $1.8 million, according to a recent SEC Form 4 filing. The sale was non-discretionary, executed under a Rule 10b5-1 trading plan adopted in August 2025, with shares sold at prices between $103.65 and $105.80. Following the transaction, Slessor directly holds 466,694 shares, a position worth roughly $49 million as of the Sept. 16, 2026, market close and representing a 0.6% stake in the Livermore-based semiconductor testing specialist. The filing indicates all reported equity is held directly, with no indirect holdings or family trusts identified, and the executive continues to hold derivative securities alongside the common stock position. FormFactor reported 32% year-over-year revenue growth in the second quarter, an acceleration from the -1% growth rate in the year-ago quarter, with operating margin reaching 22% in the recent quarter.
FormFactor IncCEO sold 17,510 shares (~$1.8M) under a pre-arranged 10b5-1 plan, a routine insider sale with no clear directional signal.