U Market Report: Sales Volume, Market Share, Leading Brands & Market Trends

Kotex is the best-performing u brand in July 2026, moving 31,000 units across 4 ASINs for 36.0% of Top 10 volume. Momcozy follows with 17,000 units (19.8%), ahead of Walipuil on 10,000 units (11.6%).

With 6 brands splitting the Top 10 and 67.4% 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 $10.46 to $51.61, 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. Specifically, one ASIN forced its way in: B0G1SRY9Y3 booked 10K units at $15.99, with ▲ 3233.3% MoM change. On the growth side, B0GXBYJ6YF leads positive momentum with ▲ 3900.0% MoM growth on 4K units, with B0FDQGPCG7 close behind at ▲ 900.0% MoM on 1K 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already changed hands — an incumbent gave up its place to make room, so any competitive set drawn up a month ago is now out of date.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.