FORMFACTOR INC

Rule 10b5-1 Trading Arrangements

During the quarter ended June 29, 2024, no director or officer of the Company adopted, modified, orterminated a “Rule 10b5-1 trading arrangement” or a “non-Rule 10b5-1 trading arrangement” as each term is defined in Item 408(a) of Regulation S-K.

The information below is reported in lieu of information that would be reported under Item 5.02 under Form 8-K.

Form of Change of Control Severance Agreement

On August 2, 2024, we adopted a severance plan (the “Plan”) to better provide for the retention of key executives by providing them with a higher degree of financial security. Shai Shahar, our Chief Financial Officer, is a participant under the Plan, which supersedes our Change of Control Severance Agreement, dated July 20, 2022, with him. The Plan provides Mr. Shahar with substantially the same benefits he had under his prior agreement with the Company and, subject to his signing a release of claims in favor of our Company, adds the following new severance benefits for a qualifying termination outside of the period beginning 90 days prior to a change of control and ending within 12 months following a change of control of our Company:

•A lump sum cash severance payment equal to one year’s annual base salary and the product of the annual base salary and the annual target bonus percentage in effect in effect on the date of termination; and

•A lump sum cash payment for up to 12 months of the amount of the Company’s monthly health insurance premium under COBRA in effect on the date of the employee’s separation under the Company’s group health plan for the type of coverage in effect for the employee under such plan.

The foregoing description of the Plan is qualified in its entirety by reference to the full text of the FormFactor, Inc. Severance Plan For US Executives, which is filed as exhibit 10.01 to this Quarterly Report on Form 10-Q.