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Merit Medical Systems stock timeline
A year of the price with every insider trade, planned sale, earnings report and material 8-K marked
252 sessions+0.9% to $87.23
Merit Medical Systems (MMSI) stock rose 1% over the last 252 sessions, to $87.23. On the way it reported 4 quarters, its insiders filed 8 open-market trades and 2 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 |
|---|---|---|---|---|---|
| Oct 29, 2026 | Earnings | Earnings: beat the EPS estimate by 7.8% | +1.3% (+1.6% vs SPY) | −1.7% (−1.0% vs SPY) | — |
| Aug 24, 2026 | Form 144 | Form 144: Neil W Peterson plans to sell $678K | −0.5% (−0.3% vs SPY) | −0.3% (−0.8% vs SPY) | −4.0% (−5.2% vs SPY) |
| Aug 24, 2026 | Insider sale | Peterson Neil W. sold $678K | −0.5% (−0.3% vs SPY) | −0.3% (−0.8% vs SPY) | −4.0% (−5.2% vs SPY) |
| Aug 20, 2026 | 8-K | Directors and officers: departures, appointments, pay | +0.6% (+0.2% vs SPY) | −0.8% (−1.9% vs SPY) | −5.4% (−7.1% vs SPY) |
| Aug 4, 2026 | Form 144 | Form 144: Neil W Peterson plans to sell $1.8M | +0.3% (−1.4% vs SPY) | +4.8% (+2.8% vs SPY) | +5.8% (+5.3% vs SPY) |
| Aug 4, 2026 | Insider sale | Peterson Neil W. sold $1.8M | +0.3% (−1.4% vs SPY) | +4.8% (+2.8% vs SPY) | +5.8% (+5.3% vs SPY) |
| Jul 30, 2026 | Earnings | Earnings: beat the EPS estimate by 24.0% | +3.1% (+1.4% vs SPY) | +7.5% (+2.2% vs SPY) | +10.2% (+4.6% vs SPY) |
| May 19, 2026 | 8-K | Directors and officers: departures, appointments, pay | +1.1% (+0.1% vs SPY) | −2.0% (−4.2% vs SPY) | +5.3% (+3.2% vs SPY) |
| May 11, 2026 | Insider buy | Smith Christian Adam bought $99K | −1.6% (−1.8% vs SPY) | +0.1% (−0.1% vs SPY) | +9.7% (+9.7% vs SPY) |
| May 7, 2026 | Insider sale | Ward Lynne N. sold $313K | +1.1% (+1.4% vs SPY) | +1.6% (+0.4% vs SPY) | +4.5% (+4.0% vs SPY) |
| May 7, 2026 | Insider buy | Lloyd Brian G. bought $125K | +1.1% (+1.4% vs SPY) | +1.6% (+0.4% vs SPY) | +4.5% (+4.0% vs SPY) |
| May 6, 2026 | Insider buy | Parra Raul Jr. bought $92K | +1.9% (+0.6% vs SPY) | +1.2% (−0.8% vs SPY) | +4.2% (−0.3% vs SPY) |
| May 6, 2026 | Insider buy | Aronson Martha Goldberg bought $121K | +1.9% (+0.6% vs SPY) | +1.2% (−0.8% vs SPY) | +4.2% (−0.3% vs SPY) |
| May 5, 2026 | Insider buy | Voigt Michel J. bought $136K | −2.6% (−3.4% vs SPY) | −2.8% (−5.7% vs SPY) | −2.2% (−7.2% vs SPY) |
| Apr 30, 2026 | Earnings | Earnings: beat the EPS estimate by 12.8% | +5.0% (+4.0% vs SPY) | −5.1% (−8.2% vs SPY) | −2.8% (−8.9% vs SPY) |
| Feb 24, 2026 | Earnings | Earnings: beat the EPS estimate by 9.0% | +1.0% (+0.3% vs SPY) | −6.5% (−7.0% vs SPY) | −18.9% (−14.8% vs SPY) |
| Jan 8, 2026 | 8-K | Directors and officers: departures, appointments, pay | −7.6% (−8.2% vs SPY) | −14.8% (−15.2% vs SPY) | −14.2% (−14.9% vs SPY) |
Insiders’ record here
In the year on the chart, Merit Medical Systems' insiders reported 5 open-market buys ($573K) and 3 sales ($2.8M). Of the 7 old enough to score, 5 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 +37.5% and after a sale +37.2%.
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 → Merit 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.