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

365 by Whole Foods Market is the best-performing cornstarch brand in July 2026, moving 20,000 units across 2 ASINs for 47.6% of Top 10 volume. Clabber Girl follows with 10,000 units (23.8%), ahead of Argo on 4,000 units (9.5%).

With 7 brands splitting the Top 10 and 81.0% 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 $1.53 to $5.34, 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: B08NTW3SVM booked 1K units at $11.99, with ▲ 0.0% MoM change. On the growth side, B076ZVGN79 leads positive momentum with ▲ 1500.0% MoM growth on 800 units, with B0GZT9TXZS close behind at ▲ 300.0% MoM on 400 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already changed hands — an incumbent gave up its place to make room, so any competitive set drawn up a month ago is now out of date.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.