Ultra Clean Holdings's three largest insider shareholders as of October 01, 2026 are James P Scholhamer (Ceo, 418.45K shares), Vijayan S. Chinnasami (Chief Operating Officer, 184.34K shares), Jinsong Xiao (Chief Executive Officer, 149.12K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | James P Scholhamer | Ceo | 418,453 | 0 | 418,453 | 25.3% | 11 Jul, 2024 |
| 2 | Vijayan S. Chinnasami | Chief Operating Officer | 184,342 | 0 | 184,342 | 11.2% | 02 May, 2023 |
| 3 | Jinsong Xiao | Chief Executive Officer | 149,123 | 0 | 149,123 | 9.0% | 27 May, 2026 |
| 4 | Christopher S Cook | President, Products Division | 98,126 | 0 | 98,126 | 5.9% | 02 Sep, 2026 |
| 5 | Clarence L Granger | Interim Ceo | 84,392 | 0 | 84,392 | 5.1% | 27 May, 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 | 66,476 | 0 | 66,476 | 4.0% | 09 Jun, 2026 |
| 9 | Barbara Vaughn Scherer | Director | 53,543 | 0 | 53,543 | 3.2% | 24 May, 2024 |
| 10 | Thomas T Edman | Director | 48,616 | 0 | 48,616 | 2.9% | 27 May, 2026 |
| 11 | David T Ibnale | Director | 47,816 | 0 | 47,816 | 2.9% | 27 May, 2026 |
| 12 | Ernest E Maddock | Director | 47,816 | 0 | 47,816 | 2.9% | 27 May, 2026 |
| 13 | Chris Siu | Chief Accounting Officer Svp | 40,106 | 0 | 40,106 | 2.4% | 02 Jun, 2022 |
| 14 | Emily M Liggett | Director | 38,152 | 0 | 38,152 | 2.3% | 27 May, 2026 |
| 15 | William Joe Williams | President, Products Business | 34,061 | 0 | 34,061 | 2.1% | 03 May, 2022 |
| 16 | Brian E Harding | Chief Accounting Officer | 33,581 | 0 | 33,581 | 2.0% | 07 Jul, 2026 |
| 17 | Jacqueline A. Seto | Director | 31,525 | 0 | 31,525 | 1.9% | 27 May, 2026 |
| 18 | Jamie J. Palfrey | Svp, Global Human Resources | 26,343 | 0 | 26,343 | 1.6% | 27 May, 2026 |
| 19 | Paul Yoonku Cho | General Counsel And Secretary | 22,941 | 0 | 22,941 | 1.4% | 04 Jun, 2026 |
| 20 | Michael Dennis Keogh | Chief Financial Officer | 20,917 | 0 | 20,917 | 1.3% | 04 Sep, 2026 |
| 21 | Jeffrey L. Mckibben | Chief Information Officer | 17,245 | 0 | 17,245 | 1.0% | 27 May, 2026 |
| 22 | Samuel Williams Johnson | Svp, Services Business | 16,436 | 0 | 16,436 | 1.0% | 27 May, 2026 |
| 23 | Joanne Solomon | Director | 12,083 | 0 | 12,083 | 0.7% | 27 May, 2026 |
| 24 | Robert Anthony Wunar | Chief Operating Officer | 10,732 | 0 | 10,732 | 0.7% | 27 May, 2026 |
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 Aug, 2026 | Michael Dennis Keogh | Chief Financial Officer | Acquired A | 20,917 | $0.00 | $0 | 20,917 | Direct |
| 31 Aug, 2026 | Christopher S Cook | President, Products Division | Disposed F | 12,497 | $67.83 | $847.67K | 98,126 | Direct |
| 02 Jul, 2026 | Brian E Harding | Chief Accounting Officer | Disposed S | 440 | $126.92 | $55.84K | 36,978 | Direct |
| 02 Jul, 2026 | Brian E Harding | Chief Accounting Officer | Disposed S | 2,194 | $128.37 | $281.64K | 34,784 | Direct |
| 02 Jul, 2026 | Brian E Harding | Chief Accounting Officer | Disposed S | 1,203 | $130.12 | $156.54K | 33,581 | Direct |
| 26 Jun, 2026 | Brian E Harding | Chief Accounting Officer | Acquired A | 9,363 | $0.00 | $0 | 37,418 | Direct |
| 04 Jun, 2026 | Sheri Savage | Cfo | Disposed S | 600 | $87.37 | $52.42K | 80,297 | Direct |
| 04 Jun, 2026 | Sheri Savage | Cfo | Disposed S | 396 | $87.24 | $34.55K | 66,080 | Direct |
| 04 Jun, 2026 | Sheri Savage | Cfo | Disposed S | 1,070 | $88.69 | $94.90K | 79,227 | Direct |
| 04 Jun, 2026 | Sheri Savage | Cfo | Disposed S | 988 | $88.29 | $87.23K | 65,092 | Direct |
| 04 Jun, 2026 | Sheri Savage | Cfo | Disposed S | 935 | $89.22 | $83.42K | 64,157 | Direct |
| 04 Jun, 2026 | Sheri Savage | Cfo | Disposed S | 688 | $89.78 | $61.77K | 78,539 | Direct |
| 04 Jun, 2026 | Sheri Savage | Cfo | Disposed S | 972 | $90.89 | $88.35K | 77,567 | Direct |
| 04 Jun, 2026 | Sheri Savage | Cfo | Disposed S | 936 | $90.40 | $84.61K | 63,221 | Direct |
| 04 Jun, 2026 | Sheri Savage | Cfo | Disposed S | 825 | $91.29 | $75.31K | 62,396 | Direct |
| 04 Jun, 2026 | Sheri Savage | Cfo | Disposed S | 172 | $91.70 | $15.77K | 77,395 | Direct |
| 04 Jun, 2026 | Sheri Savage | Cfo | Disposed S | 50 | $86.00 | $4.30K | 62,346 | Direct |
| 04 Jun, 2026 | Sheri Savage | Cfo | Disposed S | 40 | $86.00 | $3.44K | 77,355 | Direct |
| 04 Jun, 2026 | Sheri Savage | Cfo | Disposed S | 120 | $87.43 | $10.49K | 77,235 | Direct |
| 04 Jun, 2026 | Sheri Savage | Cfo | Disposed S | 160 | $87.52 | $14.00K | 62,186 | Direct |