LIVERMORE, Calif. — February 5, 2014 —FormFactor, Inc. (Nasdaq: FORM) today announced its financial results for the fourth quarter of fiscal 2013 that ended on December 28, 2013. Quarterly revenues were $48.5 million, down 28% from $67.6 million in the third quarter of fiscal 2013, and up 2% from $47.7 million in the fourth quarter of fiscal 2012.

For fiscal 2013, FormFactor posted revenue of $231.5 million, up 30% from $178.5 million in fiscal 2012.

On a GAAP basis, net loss for the fourth quarter of fiscal 2013 was $(18.8) million, or $(0.34) per fully-diluted share, compared to a net loss for the third quarter of fiscal 2013 of $(10.7) million, or $(0.20) per fully-diluted share, and a net income for the fourth quarter of fiscal 2012 of $0.6 million, or $0.01 per fully-diluted share. Net loss for fiscal 2013 was $(57.7) million, or $(1.06) per fully-diluted share, compared to a net loss of $(35.5) million, or $(0.70) per fully-diluted share, for fiscal 2012.

On a non-GAAP basis, net loss for the fourth quarter of fiscal 2013 was $(10.9) million, or $(0.20) per fully-diluted share, compared to a net loss for the third quarter of fiscal 2013 of $(3.5) million, or $(0.06) per fully-diluted share, and a net loss for the fourth quarter of fiscal 2012 of $(13.3) million, or $(0.25) per fully-diluted share. On a non-GAAP basis, net loss for fiscal 2013 was $(21.5) million, or $(0.40) per fully-diluted share. A reconciliation of GAAP to non-GAAP net loss and net loss per share is provided in the schedules included below.

Cash usage for the fourth quarter of fiscal 2013 was $(5.2) million, compared to cash generated of $1.8 million for the third quarter of fiscal 2013 and cash usage of $(110.4) million for the fourth quarter of fiscal 2012. Excluding cash usage attributable to the acquisition of Astria, but including cash from Astria’s operations subsequent to the acquisition, cash usage for the fourth quarter of fiscal 2012 was $(13.7) million.

“Despite certain market and seasonality challenges in the fourth quarter, FormFactor made significant progress in our operational and financial performance in 2013”, said Tom St. Dennis, FormFactor CEO and Executive Chairman. “2013 marked the first full year of the FormFactor/MicroProbe business combination and we delivered 2 quarters of positive cash flow for the first time since 2007. Exiting the year as a leader in both the DRAM and Logic markets, we are positioning FormFactor for sustainable profitability as we move into 2014.”

The company has posted its revenue breakdown by region and market segment on the Investors section of its website at www.formfactor.com. FormFactor will conduct a conference call at 1:30 p.m. PST, or 4:30 p.m. EST, today.

The public is invited to listen to a live webcast of FormFactor’s conference call on the Investors section of the company’s web site at www.formfactor.com. A telephone replay of the conference call will be available approximately two hours after the conclusion of the call. The telephone replay will be available through February 7, 2014, 9:00 p.m. Pacific Standard Time, and

can be accessed by dialing (855) 859-2056 (domestic) or (404) 537-3406 (international) and entering confirmation code 31046117. Additionally, the replay will be available on the Investors section of our website, www.formfactor.com.

Non-GAAP Financial Measures:

This press release highlights the company’s financial results on both a GAAP and a non-GAAP basis. The GAAP results include certain charges that are excluded from non-GAAP results. By publishing the non-GAAP measures, management intends to provide investors with additional information to further analyze the company’s performance, core results and underlying trends. FormFactor’s management evaluates results and makes operating decisions using both GAAP and non- GAAP measures included in this press release. Non-GAAP results are not prepared in accordance with GAAP, and non-GAAP information should be considered a supplement to, and not a substitute for, financial statements prepared in accordance with GAAP. Investors and potential investors are encouraged to review the reconciliation of non-GAAP financial measures to their most directly comparable GAAP measures attached to this press release.