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MKS stock timeline
A year of the price with every insider trade, planned sale, earnings report and material 8-K marked
252 sessions+24.3% to $192.27
MKS (MKSI) stock rose 24% over the last 252 sessions, to $192.27. On the way it reported 4 quarters, its insiders filed no open-market trades (10b5-1 plan sales aside) and 3 Form 144 notices of planned sales, and the company filed 3 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 |
|---|---|---|---|---|---|
| Nov 4, 2026 | Earnings | Earnings: beat the EPS estimate by 14.6% | −5.1% (−6.7% vs SPY) | — | — |
| Sep 1, 2026 | Form 144 | Form 144: Elizabeth Mora plans to sell $75K | −3.9% (−3.2% vs SPY) | +3.5% (+3.7% vs SPY) | +3.5% (+3.8% vs SPY) |
| Aug 14, 2026 | Form 144 | Form 144: John Tseng-Chung Lee plans to sell $3.0M | +1.4% (+1.6% vs SPY) | −8.3% (−6.3% vs SPY) | −24.6% (−22.4% vs SPY) |
| Aug 5, 2026 | Earnings | Earnings: beat the EPS estimate by 11.4% | −2.4% (−2.2% vs SPY) | −8.6% (−8.5% vs SPY) | −24.3% (−23.5% vs SPY) |
| Aug 3, 2026 | Form 144 | Form 144: John Edward Williams plans to sell $132K | +4.1% (+2.7% vs SPY) | +2.5% (−0.9% vs SPY) | −14.8% (−17.5% vs SPY) |
| May 12, 2026 | 8-K | Directors and officers: departures, appointments, pay | +1.8% (+1.2% vs SPY) | −5.8% (−5.2% vs SPY) | +10.3% (+10.3% vs SPY) |
| May 6, 2026 | Earnings | Earnings: beat the EPS estimate by 12.0% | +2.1% (+0.7% vs SPY) | +8.0% (+6.1% vs SPY) | +13.9% (+9.4% vs SPY) |
| Apr 6, 2026 | 8-K | Directors and officers: departures, appointments, pay | +1.0% (+0.5% vs SPY) | +13.6% (+10.0% vs SPY) | +21.7% (+12.6% vs SPY) |
| Feb 17, 2026 | Earnings | Earnings: beat the EPS estimate by 0.3% | +0.8% (+0.7% vs SPY) | −2.6% (−2.7% vs SPY) | −12.9% (−11.3% vs SPY) |
| Feb 5, 2026 | 8-K | Material definitive agreement | +3.1% (+4.3% vs SPY) | +16.3% (+15.5% vs SPY) | −4.6% (−2.5% vs SPY) |
What this kind of 8-K usually did
| Item | 8-Ks | Next session, median | Up next session | 21 sessions, median | Typical size |
|---|---|---|---|---|---|
| 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% |
| 5.02 Directors and officers: departures, appointments, pay | 39,174 | −0.1% | 48% | +0.7% | ±1.4% |
Across every company in the move-odds universe, measured from the close before the filing. Every 8-K item ranked →
Report card: every quarter against the estimate → MKS: 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.