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Inspire Medical Systems stock timeline
A year of the price with every insider trade, planned sale, earnings report and material 8-K marked
252 sessions−23.6% to $63.98
Inspire Medical Systems (INSP) stock fell 24% over the last 252 sessions, to $63.98. On the way it reported 4 quarters, its insiders filed 3 open-market trades and 1 Form 144 notice of planned sales, and the company filed 4 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 2, 2026 | Earnings | Earnings: beat the EPS estimate by 54.1% | −1.3% (−0.8% vs SPY) | −6.2% (−3.5% vs SPY) | — |
| Aug 7, 2026 | Form 144 | Form 144: Jason P Kelly plans to sell $57K | +2.1% (+1.5% vs SPY) | −1.2% (−2.4% vs SPY) | +6.9% (+6.6% vs SPY) |
| Aug 7, 2026 | Insider sale | Kelly Jason P sold $57K | +2.1% (+1.5% vs SPY) | −1.2% (−2.4% vs SPY) | +6.9% (+6.6% vs SPY) |
| Aug 3, 2026 | Earnings | Earnings: beat the EPS estimate by 157.1% | +3.9% (+2.5% vs SPY) | +18.1% (+14.6% vs SPY) | +22.7% (+20.0% vs SPY) |
| Jul 24, 2026 | 8-K | Directors and officers: departures, appointments, pay | +3.5% (+3.5% vs SPY) | +2.1% (+1.0% vs SPY) | +22.3% (+19.0% vs SPY) |
| Jul 22, 2026 | 8-K | Directors and officers: departures, appointments, pay | −4.1% (−3.9% vs SPY) | −1.0% (0.0% vs SPY) | +16.2% (+13.4% vs SPY) |
| May 15, 2026 | Insider sale | Rondoni John sold $114K | −6.3% (−5.1% vs SPY) | +4.8% (+5.5% vs SPY) | −3.6% (−4.6% vs SPY) |
| May 14, 2026 | Insider sale | Rondoni John sold $30K | +1.7% (+1.0% vs SPY) | +5.2% (+5.3% vs SPY) | +1.8% (+1.9% vs SPY) |
| May 5, 2026 | 8-K | Directors and officers: departures, appointments, pay | −5.4% (−6.8% vs SPY) | −9.1% (−11.1% vs SPY) | −13.4% (−17.9% vs SPY) |
| May 4, 2026 | Earnings | Earnings: beat the EPS estimate by 138.4% | −3.3% (−3.0% vs SPY) | −24.8% (−27.1% vs SPY) | −33.5% (−38.7% vs SPY) |
| Feb 11, 2026 | Earnings | Earnings: beat the EPS estimate by 142.1% | +0.1% (+0.1% vs SPY) | −9.6% (−8.8% vs SPY) | −15.7% (−11.8% vs SPY) |
| Jan 12, 2026 | 8-K | Directors and officers: departures, appointments, pay | −4.7% (−4.5% vs SPY) | −2.6% (0.0% vs SPY) | −35.1% (−34.7% vs SPY) |
Insiders’ record here
In the year on the chart, Inspire Medical Systems' insiders reported 0 open-market buys ($0) and 3 sales ($202K). Of the 3 old enough to score, 0 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 +30.1%.
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% |
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 → Inspire Medical Systems: 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.