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Greenbrier Companies stock timeline
A year of the price with every insider trade, planned sale, earnings report and material 8-K marked
252 sessions+0.1% to $41.51
Greenbrier Companies (GBX) stock rose 0% over the last 252 sessions, to $41.51. On the way it reported 0 quarters, its insiders filed 2 open-market trades and 1 Form 144 notice of planned sales, and the company filed 5 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 |
|---|---|---|---|---|---|
| Oct 26, 2026 | 8-K | Material definitive agreement | −2.2% (−2.7% vs SPY) | +9.7% (+11.5% vs SPY) | — |
| Aug 31, 2026 | 8-K | Directors and officers: departures, appointments, pay | −7.1% (−6.4% vs SPY) | −5.3% (−5.1% vs SPY) | −11.8% (−11.4% vs SPY) |
| Jul 13, 2026 | Form 144 | Form 144: William Glenn plans to sell $1.1M | +1.8% (+2.6% vs SPY) | +6.3% (+7.8% vs SPY) | −1.8% (−4.2% vs SPY) |
| Jul 13, 2026 | Insider sale | Glenn William sold $193K | +1.8% (+2.6% vs SPY) | +6.3% (+7.8% vs SPY) | −1.8% (−4.2% vs SPY) |
| May 5, 2026 | 8-K | Material definitive agreement | +0.4% (−1.0% vs SPY) | −0.3% (−2.2% vs SPY) | −6.8% (−11.3% vs SPY) |
| Feb 4, 2026 | 8-K | Material definitive agreement | +0.2% (+1.4% vs SPY) | +2.4% (+1.6% vs SPY) | +1.6% (+3.6% vs SPY) |
| Jan 30, 2026 | Insider sale | Krueger William J. sold $300K | +0.9% (+1.2% vs SPY) | +7.4% (+9.8% vs SPY) | +13.2% (+14.3% vs SPY) |
| Jan 9, 2026 | 8-K | Directors and officers: departures, appointments, pay | +2.1% (+2.0% vs SPY) | +3.9% (+4.2% vs SPY) | +13.3% (+13.6% vs SPY) |
Insiders’ record here
In the year on the chart, Greenbrier Companies' insiders reported 0 open-market buys ($0) and 2 sales ($493K). Of the 2 old enough to score, 2 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 −4.9%.
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 →
Greenbrier Companies: 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.