The U.S. Department of Commerce issued a preliminary affirmative determination in its antidumping investigation into fresh mushrooms imported from Canada, setting an "all others" dumping margin of 8.26%. Specific margins were set at 8.71% for Champ's Fresh Mushrooms. This is the first concrete numerical outcome in the case.
The ruling has split the industry. U.S. producers like The Giorgi Companies are welcoming the decision as long-overdue protection, while Canadian importer South Mill Champs argues the ruling ignores real market evidence. The mushroom case is a direct domestic supply-chain issue — Canadian fresh mushrooms are a meaningful volume player in U.S. retail and foodservice channels.
This is a preliminary determination, meaning a final ruling is still ahead. Watch for how importers and buyers adjust sourcing strategies in the interim, and whether the duty level — if confirmed — is enough to meaningfully shift pricing at retail.