Christopher S. Cook is President at Ultra Clean Holdings, Inc. (UCTT). They have made 5 open-market trades across 1 company since 2023, most recently 2026-08-31.
CIK 0001927266
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
1 open-market purchase totalling $104K since 2025, against 4 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| UCTT | 98,126 | $5.0M |
| UCTI | 130,015 | — |
| Total | $5.0M |
Shares reported on the most recent Form 4, priced at the 2026-09-02 close. 1 holding could not be priced and is excluded from the total.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| UCTT | SELL | 2026-05-04 | 2026-05-06 | $73.96 | $849K | -8.6% | -3.3% | -0.4% |
| UCTT | SELL | 2026-04-30 | 2026-05-04 | $75.31 | $896K | +7.3% | +15.1% | +10.8% |
| UCTT | BUY | 2025-03-07 | 2025-03-11 | $25.30 | $104K | -2.4% | -20.7% | -14.1% |
| UCTT | SELL | 2024-05-09 | 2024-05-13 | $43.51 | $747K | +1.7% | +13.2% | -17.3% |
| UCTT | SELL | 2023-11-14 | 2024-04-15 | $26.68 | $249K | -3.4% | +7.1% | +29.5% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.