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).
| 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.
| 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 |