Who makes Kirkland Signature ProCare Non-GMO Infant Formula?
As of August 31, 2026, the manufacturer of Kirkland Signature ProCare Non-GMO Infant Formula is Perrigo, per on-label, first-party, or executive statement evidence.
The common claim
What’s commonly claimed, and what the evidence supports
Many answers still say Costco's baby formula comes from Abbott, the maker of Similac. That was true for nearly two decades — a USDA report to Congress documented Abbott starting private-label formula production for Costco in spring 2001 — but it ended in late 2019, when the yellow-container Kirkland formula was replaced by the blue-container Kirkland Signature ProCare, which is manufactured by Perrigo, per Perrigo's own product pages. Perrigo makes most US store-brand formulas, and Costco is on its published retailer list.
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
Perrigo's own pediatric-nutrition site lists Kirkland Signature ProCare as one of its formulas ("Kirkland Signature™ ProCare™ Infant Formula is a milk-based routine infant formula for healthy, full-term infants 0-12 months of age") with Costco shown under "Available at Leading Retailers" — the manufacturer identifying its own product. The page's disclaimer also positions it against Similac 360 Total Care and Enfamil NeuroPro.
Tier 6
Contemporaneous documentation of the late-2019 switch: "The new formula is made by Perrigo, who also makes all the other store brand formulas. The old formula was made by Similac," with a side-by-side comparison of the outgoing yellow-container Abbott-era formula and the incoming blue-container ProCare. Personal blog, so tier 6; included as corroboration and switch-dating alongside the tier-4 Perrigo anchor.
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An attribution goes out of date when a supplier changes.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 | PerrigoCurrent | Current attribution (confirmed). See the evidence above. | Evidence ↑ |
| 2001 → 2019 | Abbott Laboratories (Ross/Similac) | A USDA Economic Research Service report to Congress documented Abbott entering private-label production for Costco in spring 2001, and the Kirkland Signature formula was identified with Abbott/Similac until Costco replaced the yellow-container formula with the Perrigo-made blue-container ProCare line in late 2019. | USDA Economic Research Service ↗ |
Frequently asked
Is Kirkland Signature baby formula the same as Similac?
Who makes Kirkland Signature ProCare infant formula?
Was Kirkland formula affected by the 2022 Abbott/Similac recall?
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