Ultra Clean Holdings, Inc.

10. STOCKHOLDERS’ EQUITY AND NONCONTROLLING INTERESTS

Treasury Stock

On October 20, 2022, the Board of Directors approved a share repurchase program authorizing the Company to purchase up to an aggregate of $150.0 million of the Company’s common stock over athree-year period.

In fiscal year 2025, the Company repurchased approximately 0.2 million shares under this program for an aggregate cost of $3.4 million and an average price of $18.64 per share. No shares were repurchased under this program in fiscal year 2024. In fiscal year 2023, approximately 1.1 million shares were repurchased under this program with an aggregate cost of $29.4 million and an average price of $29.16 per share.

As of December 26, 2025,1.5 million shares had been repurchased under the program and they are held in treasury stock. The Company records treasury stock using the cost method. The Company may reissue these treasury shares as part of its stock-based compensation programs.

On October 23, 2025, the Board of Directors approved a renewal of the share repurchase program. The renewed program authorizes the Company to repurchase up to $150.0 million of the Company's common stock over athree-year period. As of December 26, 2025, no shares had been repurchased under the renewed program.

Non-controlling Interests

The Company owns part of the outstanding shares of Cinos Korea, a South Korean company that provides outsourced cleaning and recycling of precision parts for the semiconductor industry through its operating facilities in South Korea and through a partial interest in Cinos China.

The carrying value of the remaining interest held by another shareholder in Cinos Korea and the remaining interest in Cinos China are presented as noncontrolling interests in the accompanying Consolidated Financial Statements. Noncontrolling interests are calculated based on minority ownership percentages, representing the proportionate share of net assets in the balance sheet and net income (loss) in the income statement.