Who makes Kirkland Signature Aged Parmigiano Reggiano (24-month DOP wedge and whole wheel)?
As of August 1, 2026, the manufacturer of Kirkland Signature Aged Parmigiano Reggiano (24-month DOP wedge and whole wheel) is Formaggi Zanetti (Zanetti S.p.A.), per on-label, first-party, or executive statement evidence.
The common claim
What’s commonly claimed, and what the evidence supports
Top-ranking answers name Zanetti, and the evidence is on the package: the Kirkland Signature aged wedge and whole wheel carry a Formaggi Zanetti co-brand on the back label alongside the Kirkland label on the front, per Tasting Table and Chowhound. Formaggi Zanetti (Zanetti S.p.A.), an Italian cheese house operating for over a century and Italy's largest exporter of Parmigiano Reggiano, is the named producer and ager. The one nuance the top answers get right is scope: only the aged wedge and whole wheel carry the Zanetti name — Kirkland's pre-shredded parmesan does not, so the attribution holds specifically for the wedge and wheel.
Evidence & sources
Each source is graded on the six-tier evidence rubric, where tier 1 is strongest. Sources are archived, so a citation still works if the original page moves or goes behind a paywall.
Tier 4
On-label co-brand, reported as a directly checkable label fact: 'The company name, Zanetti S.P.A., is on the package label, along with the two seals that guarantee the cheese is genuine Parmigiano Reggiano from a Protected Designation of Origin, or PDO.' Also frames the relationship as a partnership — 'the retail giant would partner with Zanetti, Italy's largest exporter of Parmigiano Reggiano ... under the Kirkland label.' Graded tier 4 as documentation of an on-label co-brand (the tier-4 evidence class); the key fact (Zanetti printed on the wedge) is in-store verifiable and reported identically by Chowhound. Upgrade/verification path: a first-party photographed back label or a Costco listing that names Zanetti (Costco's own product page title reads only 'Kirkland Signature Parmigiano Reggiano').
Tier 4
Independent corroboration of the same on-label co-brand and the format scope: 'aged Parmigiano Reggiano wedges feature both the Kirkland label on the front and a Zanetti label on the back,' and 'the brand behind Kirkland's Parmigiano Reggiano is Formaggi Zanetti. The Italian brand has been operating for over a century and produces, matures, and distributes cheeses from several regions in Italy.' Scope caveat carried by this source: 'pre-shredded cheeses ... don't carry the Formaggi Zanetti name', so this attribution covers only the aged wedge and whole wheel, not Kirkland's shredded parmesan.
Frequently asked
Who makes Kirkland Signature Parmigiano Reggiano?
Is the pre-shredded Kirkland parmesan also made by Zanetti?
How can I tell which Italian dairy actually made my wheel?
Is Kirkland Parmigiano Reggiano real DOP cheese?
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