The takeaway
Procept Biorobotics Corp shows a pronounced seasonal pattern over 5 years of data — strongest in May (+7.9%) and softest in January (−7.4%).
Right now
In July, the stock has risen 50% of years, averaging +1.9% — essentially in line with the S&P 500.
The full picture
Procept Biorobotics Corp's most dependable month has been May, higher in 4 of 4 years; January has been its least reliable, up just 25% of the time.
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Win rate % | ||||||||||||
| Median return % | ||||||||||||
| 2025 | ||||||||||||
| 2024 | ||||||||||||
| 2023 | ||||||||||||
| 2022 | ||||||||||||
| 2021 | — | — | — | — | — | — | — | — |
Month by month
The stock's clearest edge over the S&P 500 lands in May (+7.2 pts); it has trailed the market most in December (−8.2 pts).
“vs S&P” is Procept Biorobotics Corp’s average for a month minus the S&P 500’s average for that same month — isolating Procept Biorobotics Corp’s own seasonal edge from broad market drift.
Reality check
Over the last 4 years, May has closed higher 100% of the time versus 100% across the last 5 years — the pattern is holding.
Figures are the typical (median) May return and how often it rose — the last 4 years versus the last 5(the heatmap’s default window). This verdict stays anchored to that 5-year window even if you zoom the chart, so it never disagrees with the badges above.
In plain English
Strip the year back and a single month does the heavy lifting: May, up in all 4 Mays while the other eleven tend to blur together.
Its average (+7.9%) and median (+8.2%) land within a hair of each other — the tell of steady, year-after-year gains rather than one outlier doing the work. It is also the calendar's calmest month, its returns swinging least from year to year (a 1.8% spread), and even its worst May in 5 years lost only 5.5% — the gentlest downside anywhere on its calendar. Crucially, the gain is the stock's own rather than a rising tide's: May has cleared the S&P 500 by +7.2 points above the index. That consistency sets it apart from the field, where the average stock manages May only about 55% of the time.
A few other months pull their weight: August and October have also closed higher more often than not. At the other end of the calendar, January has been the soft spot — the weakest of 4 months that average a loss (−7.4%), and the edge isn't year-round — the stock has trailed the S&P 500 in December, January, and June. Its roughest month on record was a −26.9% January in 2022 — a reminder of how hard even a seasonal name can fall.
The takeaway is less about when to buy than what to expect: May aside, the stock's months offer little reliable tilt. With a short 5-year record and returns that swing hard year to year, the signal is best held loosely.
Short answers on the stock's best month (May), its worst (January), and whether it really trades seasonally.
Yes, to a pronounced degree. Since 2021 its best month (May, +7.9%) has run well ahead of its worst (January, −7.4%) — the heatmap above shows how steady that gap has been year to year.
May has been the strongest, averaging +7.9% and closing higher in all 4 years on record since 2021.
It's the weakest, averaging −7.4% — historically a soft spot, though it still varies from year to year.
Explore
These names have the strongest July track records on record — a starting point for comparison.
Before you trade