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Group 1 Automotive stock timeline
A year of the price with every insider trade, planned sale, earnings report and material 8-K marked
252 sessions−31.6% to $261.35
Group 1 Automotive (GPI) stock fell 32% over the last 252 sessions, to $261.35. On the way it reported 4 quarters, its insiders filed 18 open-market trades and 3 Form 144 notices 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 |
|---|---|---|---|---|---|
| Oct 30, 2026 | Form 144 | Form 144: Steven Mizell plans to sell $143K | +0.3% (+2.1% vs SPY) | +2.5% (+7.3% vs SPY) | — |
| Oct 30, 2026 | Insider sale | Mizell Steven sold $143K | +0.3% (+2.1% vs SPY) | +2.5% (+7.3% vs SPY) | — |
| Oct 29, 2026 | Form 144 | Form 144: Gillian Hobson plans to sell $210K | +4.1% (+4.5% vs SPY) | +8.9% (+9.6% vs SPY) | — |
| Oct 29, 2026 | Form 144 | Form 144: Gillian A. Hobson plans to sell $307K | +4.1% (+4.5% vs SPY) | +8.9% (+9.6% vs SPY) | — |
| Oct 29, 2026 | Insider sale | Hobson Gillian A. sold $516K | +4.1% (+4.5% vs SPY) | +8.9% (+9.6% vs SPY) | — |
| Oct 28, 2026 | Earnings | Earnings: missed the EPS estimate by -1.5% | −1.8% (−2.2% vs SPY) | +4.2% (+6.2% vs SPY) | — |
| Oct 26, 2026 | Insider buy | Conifer Management, L.L.C. bought $1.6M | −0.5% (−1.2% vs SPY) | +6.2% (+6.8% vs SPY) | — |
| Oct 23, 2026 | Insider buy | Conifer Management, L.L.C. bought $280K | +0.9% (+1.4% vs SPY) | +6.8% (+6.1% vs SPY) | — |
| Oct 22, 2026 | Insider buy | Conifer Management, L.L.C. bought $27K | +7.7% (+8.9% vs SPY) | +10.4% (+10.5% vs SPY) | — |
| Oct 21, 2026 | 8-K | Completed acquisition or disposition | −7.8% (−8.3% vs SPY) | +4.5% (+4.4% vs SPY) | — |
| Sep 30, 2026 | Insider buy | Conifer Management, L.L.C. bought $17.3M | −0.2% (0.0% vs SPY) | −1.7% (−3.6% vs SPY) | +3.5% (+2.5% vs SPY) |
| Sep 29, 2026 | Insider buy | Conifer Management, L.L.C. bought $16.4M | −0.5% (−0.4% vs SPY) | −0.3% (−1.5% vs SPY) | +4.8% (+4.3% vs SPY) |
| Sep 28, 2026 | Insider buy | Conifer Management, L.L.C. bought $32.5M | −4.0% (−3.3% vs SPY) | −0.9% (−0.7% vs SPY) | −3.4% (−2.6% vs SPY) |
| Sep 25, 2026 | Insider buy | Conifer Management, L.L.C. bought $12.7M | +1.8% (+1.2% vs SPY) | +3.5% (+3.9% vs SPY) | −1.1% (−0.2% vs SPY) |
| Sep 24, 2026 | 8-K | Material definitive agreement | +0.1% (+0.2% vs SPY) | −2.9% (−2.2% vs SPY) | −1.9% (−1.4% vs SPY) |
| Sep 24, 2026 | Insider buy | Conifer Management, L.L.C. bought $18.8M | +0.1% (+0.2% vs SPY) | −2.9% (−2.2% vs SPY) | −1.9% (−1.4% vs SPY) |
| Sep 22, 2026 | 8-K | Material definitive agreement | +1.1% (+1.2% vs SPY) | −3.5% (−2.5% vs SPY) | −3.2% (−2.6% vs SPY) |
| Sep 22, 2026 | 8-K | Material definitive agreement | −2.5% (−1.8% vs SPY) | −5.2% (−4.0% vs SPY) | −12.1% (−12.1% vs SPY) |
| Sep 18, 2026 | Insider buy | Conifer Management, L.L.C. bought $9.4M | −3.4% (−3.5% vs SPY) | −2.8% (−3.7% vs SPY) | −5.1% (−5.5% vs SPY) |
| Sep 17, 2026 | Insider buy | Conifer Management, L.L.C. bought $7.4M | −2.8% (−3.9% vs SPY) | −5.8% (−7.8% vs SPY) | −8.9% (−11.5% vs SPY) |
| Sep 10, 2026 | 8-K | Material definitive agreement | −1.3% (−2.1% vs SPY) | −10.0% (−10.7% vs SPY) | −19.4% (−22.4% vs SPY) |
| Sep 10, 2026 | Insider buy | Conifer Management, L.L.C. bought $10.3M | −2.1% (−1.5% vs SPY) | −9.3% (−8.2% vs SPY) | −19.5% (−21.3% vs SPY) |
| Sep 9, 2026 | Insider buy | Conifer Management, L.L.C. bought $13.4M | +2.2% (+2.6% vs SPY) | −2.2% (−1.1% vs SPY) | −19.1% (−20.8% vs SPY) |
| Sep 4, 2026 | Insider buy | Conifer Management, L.L.C. bought $17.2M | +5.6% (+6.0% vs SPY) | −2.1% (−1.0% vs SPY) | −16.3% (−16.8% vs SPY) |
| Sep 3, 2026 | Insider buy | Conifer Management, L.L.C. bought $23.5M | +2.8% (+1.8% vs SPY) | +2.0% (+2.9% vs SPY) | −10.1% (−10.9% vs SPY) |
| Sep 2, 2026 | Insider buy | Conifer Management, L.L.C. bought $7.3M | +2.5% (+2.1% vs SPY) | +6.6% (+6.5% vs SPY) | −4.8% (−5.4% vs SPY) |
| Sep 1, 2026 | Insider buy | Conifer Management, L.L.C. bought $954K | +0.2% (+0.9% vs SPY) | +4.6% (+4.7% vs SPY) | −11.2% (−10.9% vs SPY) |
| Aug 11, 2026 | 8-K | Directors and officers: departures, appointments, pay | −0.1% (−0.3% vs SPY) | −6.3% (−5.9% vs SPY) | +5.9% (+7.6% vs SPY) |
| Jul 30, 2026 | 8-K | Material definitive agreement | −18.8% (−20.4% vs SPY) | −25.4% (−30.8% vs SPY) | −31.2% (−36.8% vs SPY) |
| Jul 30, 2026 | Earnings | Earnings: missed the EPS estimate by -9.4% | −18.8% (−20.4% vs SPY) | −25.4% (−30.8% vs SPY) | −31.2% (−36.8% vs SPY) |
| Apr 30, 2026 | Earnings | Earnings: missed the EPS estimate by -1.8% | +2.2% (+1.2% vs SPY) | −1.5% (−4.6% vs SPY) | −9.9% (−16.0% vs SPY) |
| Mar 3, 2026 | 8-K | Directors and officers: departures, appointments, pay | +1.3% (+0.6% vs SPY) | −3.0% (−2.5% vs SPY) | +2.5% (+6.0% vs SPY) |
| Jan 29, 2026 | Earnings | Earnings: missed the EPS estimate by -7.3% | −8.8% (−8.6% vs SPY) | −10.2% (−8.9% vs SPY) | −19.6% (−18.3% vs SPY) |
Insiders’ record here
In the year on the chart, Group 1 Automotive's insiders reported 16 open-market buys ($189M) and 2 sales ($660K).
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% |
| 2.01 Completed acquisition or disposition | 2,671 | +0.1% | 52% | +1.2% | ±1.6% |
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 → Group 1 Automotive: 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.