Oatmeal Cups Market Report: Sales Volume, Market Share, Leading Brands & Market Trends

Quaker is the best-performing oatmeal cups brand in July 2026, moving 44,000 units across 6 ASINs for 57.9% of Top 10 volume. MUSH follows with 17,000 units (22.4%), ahead of Nature Valley on 15,000 units (19.7%).

With 3 brands splitting the Top 10 and 100.0% of volume sitting with three of them, this is a concentrated shelf — the leaders hold multiple listings or one very high-velocity ASIN, so a new entrant competes against established review moats rather than an open field. Average selling prices among the leaders run from $1.67 to $11.85, which frames the price band a competing listing has to justify.

Based on July 2026 data, this shortlist surfaces the two kinds of ASIN worth keeping an eye on — the ones that just broke into the Top 10, and the ones growing fastest month over month. On the growth side, B00437EBB0 leads positive momentum with ▲ 100.0% MoM growth on 2K units, with B01M3RZBFH close behind at ▲ 25.0% MoM on 10K units.

The two signals carry different weight. A fresh entrant means share has already changed hands — an incumbent gave up its place to make room, so any competitive set drawn up a month ago is now out of date. A steep growth rate works as the earlier warning: it marks demand that is still compounding, usually a month or two before the ranking catches up to it.