Updated Jul 16, 2026
Cook Christopher S has filed 3 SEC Form 4 filings across 1 company in the last 90 days — selling. Lifetime open-market sales: $1.75M.
Christopher S. Cook is the President of the Products Division at Ultra Clean Holdings, Inc., a company that manufactures production tools and subsystems for the semiconductor capital equipment industry. He has been involved in the company through multiple SEC filings, indicating a significant role within the organization.
| Role | President, Products Division |
|---|---|
| Notability | 20/100 |
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-05-28 | UCTT | Ultra Clean Holdings, Inc. | A — Grant or award | 13.2K | $0.00 | |
| 2026-05-06 | UCTT | Ultra Clean Holdings, Inc. | S — Open-market sale | 1.2K | $74.55 | $92K |
| 2026-05-06 | UCTT | Ultra Clean Holdings, Inc. | S — Open-market sale | 10.2K | $73.89 | $757K |
| 2026-05-05 | UCTT | Ultra Clean Holdings, Inc. | S — Open-market sale | 11.9K | $75.31 | $896K |
| 2026-05-05 | UCTT | Ultra Clean Holdings, Inc. | F — Tax withholding / forfeiture | 3.2K | $78.15 | $247K |
| 2026-05-05 | UCTT | Ultra Clean Holdings, Inc. | F — Tax withholding / forfeiture | 4.2K | $78.15 | $327K |
| 2026-05-05 | UCTT | Ultra Clean Holdings, Inc. | F — Tax withholding / forfeiture | 1.9K | $78.15 | $145K |
| 2025-08-29 | UCTT | Ultra Clean Holdings, Inc. | A — Grant or award | 73.7K | $0.00 | |
| 2025-04-30 | UCTT | Ultra Clean Holdings, Inc. | F — Tax withholding / forfeiture | 2.5K | $18.71 | $48K |
| 2025-04-30 | UCTT | Ultra Clean Holdings, Inc. | F — Tax withholding / forfeiture | 2.2K | $18.71 | $42K |
| 2025-04-30 | UCTT | Ultra Clean Holdings, Inc. | F — Tax withholding / forfeiture | 1.9K | $18.71 | $35K |
| 2025-04-25 | UCTT | Ultra Clean Holdings, Inc. | A — Grant or award | 27.8K | $0.00 |
Christopher S. Cook is the President of the Products Division at Ultra Clean Holdings, Inc., a company that manufactures production tools and subsystems for the semiconductor capital equipment industry. He has been involved in the company through multiple SEC filings, indicating a significant role within the organization.…
3 primary Form 4 filings in the last 90 days, covering 1 company.
Recorded transactions: 0 open-market purchases () and 3 open-market sales ($1.75M) across all tracked filings.
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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