MIKE SLESSOR plan to sell securities of FORMFACTOR, INC. under Form 144

MIKE SLESSOR filed Form 144 to notify SEC of plan to sell 9438 units of FORMFACTOR, INC. securities around 2026-05-13, with aggregate market value of $1,194,065.56. The total outstanding units is 77954772.0. The amount planned to be sold represents 0.01% of total outstanding units; Recent transactions in past 3 months include: On 04/15/2026, sold 11294 units for $1442486.62; On 03/18/2026, sold 10227 units for $973087.80; On 02/18/2026, sold 8664 units for $815576.98;