The takeaway
Haleon plc shows a moderate seasonal pattern over 4 years of data — strongest in April (+3.9%) and softest in October (−2.2%).
Right now
In July, the stock has risen 50% of years, averaging +0.6%, roughly 1.6 pts behind the S&P 500.
The full picture
Haleon plc's most dependable month has been April, higher in 3 of 3 years; October 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 | — | — | — | — | — | — |
Month by month
The stock's clearest edge over the S&P 500 lands in February (+3.0 pts); it has trailed the market most in October (−3.3 pts).
“vs S&P” is Haleon plc’s average for a month minus the S&P 500’s average for that same month — isolating Haleon plc’s own seasonal edge from broad market drift.
Reality check
Over the last 3 years, April has closed higher 100% of the time versus 100% across the last 4 years — the pattern is holding.
Figures are the typical (median) April return and how often it rose — the last 3 years versus the last 4(the heatmap’s default window). This verdict stays anchored to that 4-year window even if you zoom the chart, so it never disagrees with the badges above.
In plain English
This is a stock you can almost set a calendar by, and April is the anchor — it has closed higher in all 3 Aprils, the steadiest beat on its year.
Read it with one caveat: the average (+3.9%) runs well ahead of the median (+2.3%), so a handful of outsized years — not steady strength — do much of the lifting. Few months are steadier: April's returns vary by just 3.4% year to year, and even its worst April in 4 years lost only 0.8% — the gentlest downside anywhere on its calendar. Better still, that strength is the stock's own and not just a buoyant market — April has outpaced the S&P 500 by +2.2 points on average. Few peers keep such company in April — the typical stock clears it just 55% of the time.
April anchors a run, too: the January-through-May window has been the stock's reliable season. At the other end of the calendar, October has been the soft spot — the weakest of 3 months that average a loss (−2.2%), and the edge isn't year-round — the stock has trailed the S&P 500 in October, June, and August. Its roughest month on record was a −18.9% August in 2022 — a reminder of how hard even a seasonal name can fall.
For a stock this dependable in April, the sharper question is the rest of the year — outside its strong stretch, the calendar gives far less to lean on. With a short 4-year record, the signal is best held loosely.
Short answers on the stock's best month (April), its worst (October), and whether it really trades seasonally.
Yes, to a moderate degree. Since 2022 its best month (April, +3.9%) has run well ahead of its worst (October, −2.2%) — the heatmap above shows how steady that gap has been year to year.
April has been the strongest, averaging +3.9% and closing higher in all 3 years on record since 2022.
It's the weakest, averaging −2.2% — 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