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Teradyne stock timeline
A year of the price with every insider trade, planned sale, earnings report and material 8-K marked
252 sessions+18.2% to $218.22
Teradyne (TER) stock rose 18% over the last 252 sessions, to $218.22. On the way it reported 0 quarters, its insiders filed no open-market trades (10b5-1 plan sales aside) and 15 Form 144 notices of planned sales, and the company filed 1 material 8-K. 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 2, 2026 | Form 144 | Form 144: Mercedes Johnson plans to sell $46K | −5.0% (−4.5% vs SPY) | −22.9% (−20.1% vs SPY) | — |
| Oct 21, 2026 | Form 144 | Form 144: Marilyn Matz plans to sell $140K | +2.6% (+2.1% vs SPY) | −3.9% (−4.0% vs SPY) | — |
| Oct 15, 2026 | Form 144 | Form 144: Marilyn Matz plans to sell $273K | −4.6% (−4.9% vs SPY) | −4.0% (−4.4% vs SPY) | — |
| Oct 15, 2026 | Form 144 | Form 144: Gregory Stephen Smith plans to sell $1.4M | −4.6% (−4.9% vs SPY) | −4.0% (−4.4% vs SPY) | — |
| Oct 1, 2026 | Form 144 | Form 144: Mercedes Johnson plans to sell $67K | +3.6% (+3.5% vs SPY) | +2.7% (+0.8% vs SPY) | −30.2% (−31.1% vs SPY) |
| Sep 17, 2026 | Form 144 | Form 144: Marilyn Matz plans to sell $140K | +3.5% (+2.3% vs SPY) | +13.2% (+11.1% vs SPY) | +0.6% (−2.0% vs SPY) |
| Sep 15, 2026 | Form 144 | Form 144: Gregory Stephen Smith plans to sell $1.4M | +1.1% (+1.6% vs SPY) | +14.7% (+12.8% vs SPY) | +14.4% (+11.9% vs SPY) |
| Sep 15, 2026 | Form 144 | Form 144: Marilyn Matz plans to sell $270K | +1.1% (+1.6% vs SPY) | +14.7% (+12.8% vs SPY) | +14.4% (+11.9% vs SPY) |
| Sep 1, 2026 | Form 144 | Form 144: Mercedes Johnson plans to sell $57K | −4.2% (−3.5% vs SPY) | +6.2% (+6.3% vs SPY) | +13.7% (+14.0% vs SPY) |
| Aug 17, 2026 | Form 144 | Form 144: Gregory Stephen Smith plans to sell $1.7M | +5.6% (+6.1% vs SPY) | −10.9% (−9.5% vs SPY) | −22.9% (−20.4% vs SPY) |
| Aug 17, 2026 | Form 144 | Form 144: Marilyn Matz plans to sell $510K | +5.6% (+6.1% vs SPY) | −10.9% (−9.5% vs SPY) | −22.9% (−20.4% vs SPY) |
| Aug 10, 2026 | 8-K | Material definitive agreement | +3.9% (+4.2% vs SPY) | +19.4% (+19.4% vs SPY) | +5.0% (+6.4% vs SPY) |
| Aug 3, 2026 | Form 144 | Form 144: Mercedes Johnson plans to sell $59K | −0.5% (−1.9% vs SPY) | +3.1% (−0.3% vs SPY) | −5.0% (−7.6% vs SPY) |
| Jul 15, 2026 | Form 144 | Form 144: Gregory Stephen Smith plans to sell $1.4M | −3.2% (−3.6% vs SPY) | +5.7% (+6.2% vs SPY) | +13.1% (+10.4% vs SPY) |
| Jul 15, 2026 | Form 144 | Form 144: Marilyn Matz plans to sell $428K | −3.2% (−3.6% vs SPY) | +5.7% (+6.2% vs SPY) | +13.1% (+10.4% vs SPY) |
| Jul 1, 2026 | Form 144 | Form 144: Mercedes Johnson plans to sell $77K | −12.4% (−12.3% vs SPY) | −31.9% (−31.7% vs SPY) | −28.1% (−27.4% 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% |
Across every company in the move-odds universe, measured from the close before the filing. Every 8-K item ranked →
Teradyne: 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.