The takeaway
Silgan Holdings Inc shows a pronounced seasonal pattern over 10 years of data — strongest in January (+5.2%) and softest in February (−3.1%).
Right now
In July, the stock has risen 40% of years, averaging +1.1%, roughly 1.1 pts behind the S&P 500.
The full picture
Silgan Holdings Inc's most dependable month has been January, higher in 8 of 10 years; February has been its least reliable, up just 20% of the time.
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Month by month
The stock's clearest edge over the S&P 500 lands in January (+5.4 pts); it has trailed the market most in February (−2.8 pts).
“vs S&P” is Silgan Holdings Inc’s average for a month minus the S&P 500’s average for that same month — isolating Silgan Holdings Inc’s own seasonal edge from broad market drift.
Reality check
Over the last 5 years, January has closed higher 80% of the time versus 80% across the last 10 years — the pattern is holding.
Figures are the typical (median) January return and how often it rose — the last 5 years versus the last 10(the heatmap’s default window). This verdict stays anchored to that 10-year window even if you zoom the chart, so it never disagrees with the badges above.
In plain English
The seasonal story is really one month's story — January. It has closed higher in 8 of 10 Januaries, a concentration the rest of the calendar can't touch.
Read it with one caveat: the average (+5.2%) runs well ahead of the median (+2.7%), so a handful of outsized years — not steady strength — do much of the lifting. Better still, that strength is the stock's own and not just a buoyant market — January has outpaced the S&P 500 by +5.4 points on average. Few peers keep such company in January — the typical stock clears it just 53% of the time.
January anchors a run, too: the November-through-January window has been the stock's reliable season. The weaker half of the year is plainer: February has been the soft spot — the weakest of 4 months that average a loss (−3.1%), and the edge isn't year-round — the stock has trailed the S&P 500 in February, October, and September. Its roughest month on record was a −16.7% July in 2025 — a reminder of how hard even a seasonal name can fall.
Reassuringly, the tendency has held its shape: the recent five years still track the years behind them.
For a stock this dependable in January, the sharper question is the rest of the year — outside its strong stretch, the calendar gives far less to lean on.
Short answers on the stock's best month (January), its worst (February), and whether it really trades seasonally.
Yes, to a pronounced degree. Since 2016 its best month (January, +5.2%) has run well ahead of its worst (February, −3.1%) — the heatmap above shows how steady that gap has been year to year.
January has been the strongest, averaging +5.2% and closing higher in 8 of 10 years since 2016.
It's the weakest, averaging −3.1% — 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