Cook Christopher S (CIK 1927266) reported 13 SEC Form 4 insider transactions across 2 companies over the past 18 months (most recent 2026-05-27). Recent activity: Buy UCTT (13,196 shares), Sell UCTT (10,247 shares), Sell UCTT (1,231 shares), Sell UCTT (1,861 shares), Sell UCTT (4,181 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-05-27 | Ultra Clean Holdings, Inc. (UCTT) | President, Products Division | Buy | 13,196 | $0 |
| 2026-05-06 | Ultra Clean Holdings, Inc. (UCTT) | President, Products Division | Sell | 10,247 | $757,151 |
| 2026-05-06 | Ultra Clean Holdings, Inc. (UCTT) | President, Products Division | Sell | 1,231 | $91,771 |
| 2026-05-04 | Ultra Clean Holdings, Inc. (UCTT) | President, Products Division | Sell | 1,861 | $145,437 |
| 2026-05-04 | Ultra Clean Holdings, Inc. (UCTT) | President, Products Division | Sell | 4,181 | $326,745 |
| 2026-05-04 | Ultra Clean Holdings, Inc. (UCTT) | President, Products Division | Sell | 3,165 | $247,345 |
| 2026-05-04 | Ultra Clean Holdings, Inc. (UCTT) | President, Products Division | Sell | 11,903 | $896,415 |
| 2025-09-03 | Ultra Clean Holdings, Inc. (UCTI) | President, Products Division | Buy | 73,686 | $0 |
| 2025-05-02 | Ultra Clean Holdings, Inc. (UCTT) | President, Products Division | Sell | 1,855 | $34,707 |
| 2025-05-02 | Ultra Clean Holdings, Inc. (UCTT) | President, Products Division | Sell | 2,225 | $41,630 |
| 2025-05-02 | Ultra Clean Holdings, Inc. (UCTT) | President, Products Division | Sell | 2,550 | $47,710 |
| 2025-04-29 | Ultra Clean Holdings, Inc. (UCTT) | President, Products Division | Buy | 27,831 | $0 |
| 2025-03-11 | Ultra Clean Holdings, Inc. (UCTT) | President, Products Division | Buy | 4,100 | $103,730 |
Source: SEC Form 4 filings · as of 2026-05-27