Who really makes Costco’s Kirkland Signature products — and how good is the evidence?

A tier 1–4 source directly names the maker for this exact product — a court or recall record, a plant code, an on-label co-brand, or an executive statement. Stated plainly, with the source.

Strong but indirect evidence points to a maker — a registration list, a customs trail, a shared safety-data fingerprint. We say the evidence points to it; we never state it as fact.

Only community reporting or teardowns name a candidate. It is shown, always badged unverified, and never asserted as the answer in a heading or fact sentence.

No reliable public evidence identifies the manufacturer. We publish the documented search — every database and record we checked — instead of guessing a name.