Ultra Clean Holdings, Inc. (UCTT) Insider Ownership

Historic Insider Ownership Trends

Ultra Clean Holdings's three largest insider shareholders as of March 23, 2026 are Vijayan S. Chinnasami (Chief Operating Officer, 184.34K shares), Christopher S Cook (President, Products Division, 130.01K shares), Jinsong Xiao (Chief Executive Officer, 117.95K shares).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares (Direct) Shares (Indirect) Report Date
Vijayan S. Chinnasami Chief Operating Officer 184,342 0 02 May, 2023
Christopher S Cook President, Products Division 130,015 0 03 Sep, 2025
Jinsong Xiao Chief Executive Officer 117,948 0 30 Sep, 2025
Clarence L Granger 111,817 0 03 Mar, 2026
Harjinder Bajwa Chief Operating Officer 76,693 0 02 Jul, 2025
Bill Bentinck President, Services Business 71,503 0 02 May, 2025
Sheri Savage Cfo 66,381 0 02 May, 2025
Brian E Harding Chief Accounting Officer 48,237 0 02 Jul, 2025
David T Ibnale 45,241 0 05 Dec, 2025
Ernest E Maddock 45,241 0 23 May, 2025
Joan Sterling Svp, Human Resources 40,548 0 04 May, 2021
Chris Siu Chief Accounting Officer Svp 40,106 0 02 Jun, 2022
William Joe Williams President, Products Business 34,061 0 03 May, 2022
Jamie J. Palfrey Svp, Global Human Resources 30,465 0 08 May, 2025
Jacqueline A. Seto 28,950 0 23 May, 2025
Paul Yoonku Cho General Counsel And Secretary 23,345 0 10 Jun, 2025
Jeffrey L. Mckibben Chief Information Officer 21,996 0 06 Jun, 2025
Amir Widmann President, Fluid Solutions 14,462 0 18 May, 2021
Ernest E Maddock 0 11,000 11 Mar, 2025
Joanne Solomon 9,508 0 27 May, 2025
Christopher S Cook President, Products Division 0 4,100 11 Mar, 2025
Clarence L Granger 0 1,000 11 Mar, 2025

* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
Transaction Date Insider Name Security Class Transaction Type Shares Traded Price Shares Remaining Ownership Code
27 Feb, 2026 Clarence L Granger Common Stock D 6,000 $0.00 111,817 D G
03 Dec, 2025 David T Ibnale Common Stock D 23,500 $26.63 45,241 D S
02 Dec, 2025 Clarence L Granger Common Stock D 1,000 $0.00 117,817 D G
25 Nov, 2025 Clarence L Granger Common Stock D 3,000 $0.00 118,817 D G
26 Sep, 2025 Jinsong Xiao Common Stock A 117,948 $0.00 117,948 D A
12 Sep, 2025 Clarence L Granger Common Stock D 9,938 $25.23 121,817 D F
29 Aug, 2025 Christopher S Cook Common Stock A 73,686 $0.00 130,015 D A
30 Jun, 2025 Brian E Harding Common Stock D 4,198 $22.57 48,237 D F
30 Jun, 2025 Harjinder Bajwa Common Stock D 4,534 $22.57 76,693 D F
06 Jun, 2025 Paul Yoonku Cho Common Stock D 4,084 $21.06 23,345 D S
04 Jun, 2025 Jeffrey L. Mckibben Common Stock D 6,294 $20.87 21,996 D S
21 May, 2025 Joanne Solomon Common Stock A 8,198 $0.00 9,508 D A
21 May, 2025 Jacqueline A. Seto Common Stock A 8,198 $0.00 28,950 D A
21 May, 2025 David T Ibnale Common Stock A 8,198 $0.00 68,741 D A
21 May, 2025 Clarence L Granger Common Stock A 8,198 $0.00 131,755 D A
21 May, 2025 Ernest E Maddock Common Stock A 8,198 $0.00 45,241 D A
06 May, 2025 Jamie J. Palfrey Common Stock D 9,500 $19.20 30,465 D S
30 Apr, 2025 Brian E Harding Common Stock D 1,956 $18.71 54,346 D F
30 Apr, 2025 Bill Bentinck Common Stock D 956 $18.71 73,924 D F
30 Apr, 2025 Jeffrey L. Mckibben Common Stock D 962 $18.71 30,579 D F