Paul Yoonku Cho is CLO & Secretary at Ultra Clean Holdings, Inc. (UCTT). They have made 9 open-market trades across 1 company since 2021, most recently 2026-06-02.
CIK 0001791106
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.
0 open-market purchases, against 9 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| UCTT | 22,941 | $1.2M |
Shares reported on the most recent Form 4, priced at the 2026-06-04 close.
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 | 2026-06-02 | 2026-06-04 | $89.37 | $84K | +25.0% | +20.6% | -24.4% |
| UCTT | SELL | 2026-05-08 | 2026-05-12 | $86.89 | $174K | -0.4% | +24.4% | -2.6% |
| UCTT | SELL | 2025-06-06 | 2025-06-10 | $21.06 | $172K | -9.1% | +14.1% | +12.0% |
| UCTT | SELL | 2024-05-17 | 2024-05-21 | $44.79 | $309K | -0.2% | +3.5% | -14.1% |
| UCTT | SELL | 2023-12-04 | 2023-12-06 | $28.38 | $266K | +12.2% | +11.9% | +61.9% |
| UCTT | SELL | 2023-05-26 | 2023-05-31 | $36.10 | $6K | +7.1% | +12.4% | -2.5% |
| UCTT | SELL | 2022-11-03 | 2022-11-07 | $29.41 | $173K | +1.4% | +4.2% | +9.9% |
| UCTT | SELL | 2022-05-11 | 2022-05-13 | $30.41 | $215K | -1.6% | -7.9% | +4.6% |
| UCTT | SELL | 2021-11-03 | 2021-11-05 | $55.24 | $1.0M | +0.5% | -7.8% | -16.0% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.