Ultra Clean Holdings's top three insider shareholders as of August 04, 2026 are James P Scholhamer (Ceo, 418.45K shares), Vijayan S. Chinnasami (Chief Operating Officer, 184.34K shares), Christopher S Cook (President, Products Division, 130.01K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | James P Scholhamer | Ceo | 418,453 | 0 | 418,453 | 25.2% | 11 Jul, 2024 |
| 2 | Vijayan S. Chinnasami | Chief Operating Officer | 184,342 | 0 | 184,342 | 11.1% | 02 May, 2023 |
| 3 | Christopher S Cook | President, Products Division | 130,015 | 0 | 130,015 | 7.8% | 03 Sep, 2025 |
| 4 | Jinsong Xiao | Chief Executive Officer | 117,948 | 0 | 117,948 | 7.1% | 30 Sep, 2025 |
| 5 | Clarence L Granger | Interim Ceo | 111,817 | 0 | 111,817 | 6.7% | 03 Mar, 2026 |
| 6 | Harjinder Bajwa | Chief Operating Officer | 76,693 | 0 | 76,693 | 4.6% | 02 Jul, 2025 |
| 7 | Bill Bentinck | President, Services Business | 71,503 | 0 | 71,503 | 4.3% | 02 May, 2025 |
| 8 | Sheri Savage | Cfo | 66,381 | 0 | 66,381 | 4.0% | 02 May, 2025 |
| 9 | Barbara Vaughn Scherer | Director | 53,543 | 0 | 53,543 | 3.2% | 24 May, 2024 |
| 10 | Brian E Harding | Chief Accounting Officer | 48,237 | 0 | 48,237 | 2.9% | 02 Jul, 2025 |
| 11 | Thomas T Edman | Director | 46,041 | 0 | 46,041 | 2.8% | 27 May, 2025 |
| 12 | Ernest E Maddock | Director | 45,241 | 0 | 45,241 | 2.7% | 23 May, 2025 |
| 13 | David T Ibnale | Director | 45,241 | 0 | 45,241 | 2.7% | 05 Dec, 2025 |
| 14 | Emily M Liggett | Director | 43,775 | 0 | 43,775 | 2.6% | 23 May, 2025 |
| 15 | Chris Siu | Chief Accounting Officer Svp | 40,106 | 0 | 40,106 | 2.4% | 02 Jun, 2022 |
| 16 | William Joe Williams | President, Products Business | 34,061 | 0 | 34,061 | 2.1% | 03 May, 2022 |
| 17 | Jamie J. Palfrey | Svp, Global Human Resources | 30,465 | 0 | 30,465 | 1.8% | 08 May, 2025 |
| 18 | Jacqueline A. Seto | Director | 28,950 | 0 | 28,950 | 1.7% | 23 May, 2025 |
| 19 | Paul Yoonku Cho | General Counsel And Secretary | 23,345 | 0 | 23,345 | 1.4% | 10 Jun, 2025 |
| 20 | Jeffrey L. Mckibben | Chief Information Officer | 21,996 | 0 | 21,996 | 1.3% | 06 Jun, 2025 |
| 21 | Samuel Williams Johnson | Svp, Services Business | 10,869 | 0 | 10,869 | 0.7% | 02 Apr, 2026 |
| 22 | Joanne Solomon | Director | 9,508 | 0 | 9,508 | 0.6% | 27 May, 2025 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 31 Mar, 2026 | Samuel Williams Johnson | Svp, Services Business | Disposed F | 1,476 | $62.18 | $91.78K | 10,869 | Direct |
| 27 Feb, 2026 | Clarence L Granger | Director | Disposed G | 6,000 | $0.00 | $0 | 111,817 | Direct |
| 03 Dec, 2025 | David T Ibnale | Director | Disposed S | 23,500 | $26.63 | $625.75K | 45,241 | Direct |
| 02 Dec, 2025 | Clarence L Granger | Director | Disposed G | 1,000 | $0.00 | $0 | 117,817 | Direct |
| 25 Nov, 2025 | Clarence L Granger | Director | Disposed G | 3,000 | $0.00 | $0 | 118,817 | Direct |
| 26 Sep, 2025 | Jinsong Xiao | Chief Executive Officer | Acquired A | 117,948 | $0.00 | $0 | 117,948 | Direct |
| 26 Sep, 2025 | Jinsong Xiao | Chief Executive Officer | Acquired A | 117,948 | $0.00 | $0 | 117,948 | Direct |
| 26 Sep, 2025 | Jinsong Xiao | Chief Executive Officer | Acquired A | 117,948 | $0.00 | $0 | 117,948 | Direct |
| 12 Sep, 2025 | Clarence L Granger | Director | Disposed F | 9,938 | $25.23 | $250.74K | 121,817 | Direct |
| 29 Aug, 2025 | Christopher S Cook | President, Products Division | Acquired A | 73,686 | $0.00 | $0 | 130,015 | Direct |
| 30 Jun, 2025 | Brian E Harding | Chief Accounting Officer | Disposed F | 4,198 | $22.57 | $94.75K | 48,237 | Direct |
| 30 Jun, 2025 | Harjinder Bajwa | Chief Operating Officer | Disposed F | 4,534 | $22.57 | $102.33K | 76,693 | Direct |
| 06 Jun, 2025 | Paul Yoonku Cho | General Counsel And Secretary | Disposed S | 4,084 | $21.06 | $86.01K | 23,345 | Direct |
| 04 Jun, 2025 | Jeffrey L. Mckibben | Chief Information Officer | Disposed S | 6,294 | $20.87 | $131.36K | 21,996 | Direct |
| 21 May, 2025 | Thomas T Edman | Director | Acquired A | 8,198 | $0.00 | $0 | 46,041 | Direct |
| 21 May, 2025 | Joanne Solomon | Director | Acquired A | 8,198 | $0.00 | $0 | 9,508 | Direct |
| 21 May, 2025 | Ernest E Maddock | Director | Acquired A | 8,198 | $0.00 | $0 | 45,241 | Direct |
| 21 May, 2025 | Emily M Liggett | Director | Acquired A | 8,198 | $0.00 | $0 | 43,775 | Direct |
| 21 May, 2025 | Jacqueline A. Seto | Director | Acquired A | 8,198 | $0.00 | $0 | 28,950 | Direct |
| 21 May, 2025 | Clarence L Granger | Interim Ceo | Acquired A | 8,198 | $0.00 | $0 | 131,755 | Direct |