Ultra Clean Holdings, Inc. filings document the company's operating results, governance matters, and capital-structure activity as a Nasdaq-listed supplier to the semiconductor industry. Form 8-K reports cover quarterly and annual financial results, executive and board leadership changes, material agreements, and financing transactions.
The company's regulatory record also includes proxy materials for annual meeting and shareholder voting matters, along with disclosures on its common stock, credit-facility amendments, and 0.00% Convertible Senior Notes due 2031. These filings describe formal updates to Ultra Clean's financing arrangements, officer succession, board oversight, and public-company reporting obligations.
Ultra Clean Holdings' chief accounting officer Brian E. Harding sold 16,988 shares of common stock in open-market transactions. The trades occurred on June 4, 2026 across 22 separate sales. Reported sale prices ranged from about $85.54 to $91.86 per share, based on weighted-average prices and detailed price ranges disclosed in the footnotes.
Ultra Clean Holdings, Inc. General Counsel and Secretary Paul Yoonku Cho reported an open-market sale of company common stock. On June 2, 2026, he sold 944 shares of common stock at a price of $89.37 per share.
After this transaction, Cho directly holds 22,941 shares of Ultra Clean common stock. This filing records a single, relatively small open-market sale and shows his remaining equity stake in the company following the trade.
UCTT filed a Form 144 disclosing an insider sale and proposed resale activity. The filing shows a reported sale by Brian Harding of 4,000 shares of Common stock on 05/05/2026 for $320,000. The excerpt also lists proposed sales under an Employee Stock Purchase Plan (1,322 shares, 11/01/2024) and Restricted Stock awards (15,666 shares, 06/24/2024).
Paul Y. Cho reported a sale of 2,000 shares of Common Stock on 05/08/2026. The reported gross proceeds were $173,780.20. The filing also lists 944 restricted shares associated with an 04/30/2026 issuance by Morgan Stanley Smith Barney LLC as broker/dealer information.
Cook Christopher S reported acquisition or exercise transactions in this Form 4 filing.
Ultra Clean Holdings, Inc. reported that Christopher S. Cook, President of the Products Division, received a grant of 13,196 shares of common stock at a price of $0.00 per share as a compensation-related award. After this grant, he directly holds 110,623 shares of common stock and indirectly holds 4,100 shares through a trust. A related footnote explains that the restricted stock units underlying this award vest over three years, with equal portions vesting on each anniversary of the vesting commencement date of May 22, 2026.
Ultra Clean Holdings, Inc. reported that its General Counsel and Secretary, Paul Yoonku Cho, received an equity compensation grant. On May 22, 2026, he was awarded 8,041 shares of Common Stock at no cash cost, classified as a grant or award acquisition.
Following this transaction, Cho directly holds 23,885 shares of the company’s Common Stock. A related footnote explains that the award consists of restricted stock units that vest over three years, with equal portions vesting on each anniversary of the May 22, 2026 vesting commencement date.
Xiao Jinsong reported acquisition or exercise transactions in this Form 4 filing.
Ultra Clean Holdings, Inc. Chief Executive Officer Jinsong Xiao received an equity compensation grant of 31,175 shares of common stock on May 22, 2026. The award is in the form of restricted stock units that vest over three years, with equal portions vesting on each anniversary of the May 22, 2026 vesting commencement date.
Following this grant, Xiao directly holds 149,123 shares of Ultra Clean common stock. The grant was recorded at no cash purchase price, reflecting a compensation-related award rather than an open-market share purchase.
Solomon Joanne reported acquisition or exercise transactions in this Form 4 filing.
Ultra Clean Holdings, Inc. director Joanne Solomon reported receiving a grant of 2,575 shares of common stock as a stock-based award. The award was recorded at a price of $0.00 per share, reflecting compensation rather than a market purchase. Following this grant, Solomon directly holds 12,083 common shares. According to the footnote, these restricted stock units vest 100% on the earlier of the day before the next annual stockholder meeting or one year from the grant date, tying the award to her continued board service over roughly a one-year period.
McKibben Jeffrey L. reported acquisition or exercise transactions in this Form 4 filing.
Ultra Clean Holdings, Inc. reported that Chief Information Officer Jeffrey L. McKibben received an equity award of 5,896 shares of common stock as a grant with no cash price per share. Following this award, he directly holds 17,245 common shares.
The grant is in the form of restricted stock units that vest over three years, with equal portions vesting on each anniversary of the vesting commencement date of May 22, 2026. This structure ties the value of the award to McKibben’s continued service and the company’s share performance over time.