Who makes Kirkland Signature Real Mayonnaise, 64 oz?
No reliable public evidence identifies the manufacturer of Kirkland Signature Real Mayonnaise, 64 oz as of August 10, 2026.
The common claim
What most answers say — and what the evidence supports
The two answers that circulate - that Kirkland Signature Real Mayonnaise is a rebadged Hellmann's/Best Foods (Unilever) or that private-label giant Ventura Foods produces it - have no tier 1-5 evidence behind them. Costco does not disclose the maker, and a documented sweep of recall databases, federal court records, SEC filings, customs data, trade press, and Costco's own pages turned up no source naming it. (Separately, a widely shared 2025 story about Costco 'pulling' a Kirkland mayo refers to a different, omega-3-enhanced formulation that was scrapped before launch, not the mayonnaise on shelves today.)
Evidence & sources
Costco does not disclose its suppliers, and no tier 1–5 source names the maker of this product. Below is the documented search — every database and record we checked, and what each one returned.
FDA & CPSC recall databases (openFDA food-enforcement API; SaferProducts.gov REST API) July 5, 2026
CPSC returned zero recalls for 'mayonnaise'. openFDA food-enforcement search for 'mayonnaise' + 'kirkland' returned no matches. No Kirkland Signature mayonnaise recall exists, so the recall route surfaces no co-packer.
CourtListener / RECAP federal court records (v4 search API) July 5, 2026
Search for "Kirkland Signature" + mayonnaise returned 0 opinions. No litigation names a supplier of Kirkland Signature mayonnaise.
SEC EDGAR full-text search (2001-present) July 5, 2026
A full-text EDGAR sweep surfaced no filing naming the maker of Kirkland Signature mayonnaise. The most-named private-label candidate, Ventura Foods, is privately held (a joint venture of CHS Inc. and Mitsui & Co.) and files no reports of its own; Unilever, owner of the Hellmann's/Best Foods brands, files as a foreign private issuer and its filings do not name a Kirkland mayonnaise relationship.
Costco.com product-detail 'mfName' route (via Wayback Machine; costco.com blocks automated fetch) July 5, 2026
The current Kirkland Signature Real Mayonnaise PDP (item 100333885) has no Wayback snapshot, so the newer Costco catalog's manufacturer field ('mfName' - the field that resolved Kirkland diapers, batteries, and the Kirkland energy drink) is unavailable for this item. The only archived Costco mayo page is a 2015 costcobusinessdelivery listing (item 11901300) that predates the mfName field. Capturing the live PDP's mfName is a browser follow-up for Ian.
ImportYeti / US customs bills of lading July 5, 2026
No Costco mayonnaise supplier signal surfaced. The route is structurally weak here regardless: shelf-stable mayonnaise sold in the US is overwhelmingly produced domestically, and Costco masks many shipments via freight forwarders, so absence of import records proves nothing (tier 5 caveat).
News, trade press, and executive-statement sweep (Google/Bing news, food trade press) July 5, 2026
No article or executive statement names the maker of the current Kirkland Signature Real Mayonnaise. Ventura Foods is a major US private-label and food-service mayonnaise producer, but no source ties it to the Kirkland brand. The heavily circulated 2025 Kirkland-mayo story (The Takeout, Tasting Table, Yahoo) concerns a different, omega-3-enhanced formulation Costco scrapped before launch because the added fatty acids destabilized and broke the emulsion (archived: https://web.archive.org/web/20260208172501/https://www.thetakeout.com/1928390/costco-discontinued-kirkland-signature-mayo/) - it names no manufacturer.
Frequently asked
Who makes Kirkland Signature mayonnaise for Costco?
Is Kirkland mayonnaise the same as Hellmann's or Best Foods?
Did Costco discontinue Kirkland mayonnaise?
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