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Ultra Clean Holdings stock timeline
A year of the price with every insider trade, planned sale, earnings report and material 8-K marked
252 sessions+57.4% to $41.13
Ultra Clean Holdings (UCTT) stock rose 57% over the last 252 sessions, to $41.13. On the way it reported 0 quarters, its insiders filed 9 open-market trades and 1 Form 144 notice of planned sales, and the company filed 8 material 8-Ks. Each is marked on the price and listed with what the stock did next.
Each mark, and what followed
| Date | Kind | What | Next session | 5 sessions | 21 sessions |
|---|---|---|---|---|---|
| Sep 30, 2026 | 8-K | Directors and officers: departures, appointments, pay | −3.0% (−3.2% vs SPY) | −12.7% (−14.6% vs SPY) | −39.3% (−40.2% vs SPY) |
| Aug 14, 2026 | 8-K | Material definitive agreement | −9.0% (−8.8% vs SPY) | −24.1% (−22.1% vs SPY) | −33.6% (−31.4% vs SPY) |
| Aug 6, 2026 | 8-K | Directors and officers: departures, appointments, pay | +4.8% (+4.2% vs SPY) | +11.1% (+9.9% vs SPY) | −13.8% (−14.0% vs SPY) |
| Jul 8, 2026 | 8-K | Directors and officers: departures, appointments, pay | +5.1% (+4.3% vs SPY) | +1.2% (−0.1% vs SPY) | −19.3% (−22.4% vs SPY) |
| Jul 2, 2026 | Form 144 | Form 144: Brian Harding plans to sell $494K | −19.6% (−19.5% vs SPY) | −19.9% (−20.7% vs SPY) | −44.2% (−44.3% vs SPY) |
| Jun 2, 2026 | Insider sale | Cho Paul Yoonku sold $84K | +6.3% (+6.2% vs SPY) | −0.9% (+1.6% vs SPY) | +42.5% (+44.0% vs SPY) |
| May 27, 2026 | Insider sale | Liggett Emily M sold $756K | +4.6% (+4.6% vs SPY) | +3.1% (+1.9% vs SPY) | +32.2% (+34.1% vs SPY) |
| May 14, 2026 | Insider sale | McKibben Jeffrey L. sold $366K | +1.6% (+0.8% vs SPY) | −5.8% (−5.7% vs SPY) | +24.7% (+24.8% vs SPY) |
| May 8, 2026 | Insider sale | McKibben Jeffrey L. sold $216K | +8.6% (+7.8% vs SPY) | +7.8% (+5.6% vs SPY) | +4.9% (+3.9% vs SPY) |
| May 8, 2026 | Insider sale | Cho Paul Yoonku sold $174K | +8.6% (+7.8% vs SPY) | +7.8% (+5.6% vs SPY) | +4.9% (+3.9% vs SPY) |
| May 5, 2026 | Insider sale | Palfrey Jamie J. sold $693K | +12.9% (+12.1% vs SPY) | +15.6% (+12.7% vs SPY) | +23.6% (+18.7% vs SPY) |
| May 5, 2026 | Insider sale | Harding Brian E sold $320K | +12.9% (+12.1% vs SPY) | +15.6% (+12.7% vs SPY) | +23.6% (+18.7% vs SPY) |
| May 4, 2026 | Insider sale | Cook Christopher S sold $849K | −2.0% (−1.7% vs SPY) | +15.5% (+13.2% vs SPY) | +19.0% (+13.7% vs SPY) |
| Apr 30, 2026 | Insider sale | Cook Christopher S sold $896K | +8.2% (+7.2% vs SPY) | +14.7% (+11.7% vs SPY) | +17.2% (+11.1% vs SPY) |
| Apr 24, 2026 | 8-K | Material definitive agreement | −2.3% (−2.5% vs SPY) | −10.7% (−11.6% vs SPY) | +5.2% (+0.2% vs SPY) |
| Mar 3, 2026 | 8-K | Material definitive agreement | −1.1% (−1.8% vs SPY) | −5.8% (−5.3% vs SPY) | +6.3% (+9.8% vs SPY) |
| Feb 27, 2026 | 8-K | Material definitive agreement | +2.0% (+2.5% vs SPY) | −6.4% (−5.2% vs SPY) | −1.0% (+7.1% vs SPY) |
| Jan 28, 2026 | 8-K | Directors and officers: departures, appointments, pay | −0.8% (−0.8% vs SPY) | −0.8% (0.0% vs SPY) | +26.3% (+27.2% vs SPY) |
Insiders’ record here
In the year on the chart, Ultra Clean Holdings' insiders reported 0 open-market buys ($0) and 9 sales ($4.4M). Of the 9 old enough to score, 7 were followed by the stock doing what the trade implied over the next 63 sessions (beating SPY after a buy, lagging it after a sale); the median excess return after a buy was — and after a sale −9.9%.
Across the whole universe (19,782 scored trades), insider buys beat the market 46% of the time and sales were followed by a lagging stock 61% of the time; buys of $1M or more 39%. Every pattern →
What this kind of 8-K usually did
| Item | 8-Ks | Next session, median | Up next session | 21 sessions, median | Typical size |
|---|---|---|---|---|---|
| 5.02 Directors and officers: departures, appointments, pay | 39,174 | −0.1% | 48% | +0.7% | ±1.4% |
| 1.01 Material definitive agreement | 23,525 | 0.0% | 51% | +1.0% | ±1.4% |
| 2.03 New debt or off-balance-sheet obligation | 13,268 | 0.0% | 50% | +1.2% | ±1.3% |
Across every company in the move-odds universe, measured from the close before the filing. Every 8-K item ranked →
Ultra Clean Holdings: every quarter → Live insider trades →
Prices are daily closes; filings and trades are as filed with the SEC (Form 4 within two business days of the trade, 8-K within four of the event). Moves after a mark are the stock's close-to-close change and the same for SPY; they describe the record, not what the next one will do. Not investment advice.