Who makes Kirkland Signature Diapers (Sizes 1-7)?
As of July 5, 2026, the manufacturer of Kirkland Signature Diapers (Sizes 1-7) is First Quality Enterprises, per on-label, first-party, or executive statement evidence.
The common claim
What’s commonly claimed, and what the evidence supports
While Costco used to work with Kimberly-Clark, manufacturer of Huggies, for the Kirkland Signature diapers, Costco started working with a new manufacturer in 2025. In January 2025, Costco switched to working with First Quality, the maker of Cuties diapers, per Bloomberg and Fortune, and still works with them today.
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
Costco Wholesale Corp. is switching manufacturers for its popular Kirkland Signature brand of diapers as its supplier moves away from store brands to boost profitability. First Quality is replacing Kimberly-Clark Corp. as the maker of Costco’s diapers, with the official change set to happen in January, according to people familiar with the decision who weren’t authorized to speak publicly about the matter.
Tier 4
Post-switch confirmation the change happened: "First Quality, a company based in Great Neck, New York, that makes Cuties diapers and other items, recently replaced Kimberly-Clark Corp. as the producer of Costco's diapers" (manufacturer naming credited to Bloomberg's earlier report). Also documents that Costco "doesn't comment on its manufacturing partners" and was still rolling the new diapers into its 600+ US stores as of April 2025.
Manufacturer history
An attribution goes out of date when a supplier changes. We date each change and keep the earlier source.
| Period | Manufacturer | What the record says | Source |
|---|---|---|---|
| Present | First Quality EnterprisesCurrent | Current attribution (confirmed). See the evidence above. | Evidence ↑ |
| … → January 2025 | Kimberly-Clark | Kimberly-Clark manufactured Kirkland diapers for years (start date not publicly confirmed; documented at least as of the 2022 WTAE report), and was reported by Bloomberg in December 2024 — per people familiar with the decision — to be exiting the private-label business, with First Quality taking over in January 2025. | WTAE ↗ |
Frequently asked
Are Kirkland diapers the same as Huggies?
When did Kirkland diapers change manufacturer?
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