Costco owns Kirkland Signature protein bars; the dated Costco disclosures reviewed here do not name a current factory or contract manufacturer for each flavor. [1][3]

Who makes Kirkland Protein Bars?

Owner
Kirkland Signature is Costco’s private label. Its 2025 annual report marks the trademark’s 30th anniversary. [3]
Made by
Costco’s 2016 shareholder letter specifically lists protein bars among its new Kirkland food items. Its supplier and traceability disclosures do not identify the mixing, forming or packing company for today’s cartons. [1][2]
Made in
A current protein-bar production country and plant are Unconfirmed in these sources. Costco’s brand ownership does not establish manufacture at its Washington corporate address. [1][2][3]

Last checked · 3 sources · English source review

Kirkland Protein Bars supply chain map

Select a node to inspect its role and evidence. Arrows show ownership or manufacturing relationships, not shipment volumes.

Brand

→ Owner

→ Manufacturer

→ Factory

Kirkland Protein Bars

Costco owns Kirkland Signature protein bars; the dated Costco disclosures reviewed here do not name a current factory or contract manufacturer for each flavor.

Evidence: [1][3]

Text version of the map

  • Kirkland Protein Bars (Brand): Costco owns Kirkland Signature protein bars; the dated Costco disclosures reviewed here do not name a current factory or contract manufacturer for each flavor. [1][3]
  • Kirkland Protein Bars → Costco Wholesale (Owner): Kirkland Signature is Costco’s private label. Its 2025 annual report marks the trademark’s 30th anniversary. [3]
  • Costco Wholesale → Kirkland Protein Bars manufacturing (Manufacturer): Costco’s 2016 shareholder letter specifically lists protein bars among its new Kirkland food items. Its supplier and traceability disclosures do not identify the mixing, forming or packing company for today’s cartons. [1][2]

Who owns Kirkland Protein Bars?

Kirkland Signature is Costco’s private label. Its 2025 annual report marks the trademark’s 30th anniversary. [3]

Ownership guides: Costco Hot DogsKirkland BatteriesKirkland BourbonKirkland cat foodKirkland CoffeeKirkland DiapersKirkland Dog FoodKirkland FormulaKirkland Golf BallsKirkland Olive OilKirkland paper towelsKirkland TequilaKirkland Toilet PaperKirkland VodkaKirkland waterKirkland whiskeyKirkland WineKirkland Signature

Who actually makes Kirkland Protein Bars products?

Costco’s 2016 shareholder letter specifically lists protein bars among its new Kirkland food items. Its supplier and traceability disclosures do not identify the mixing, forming or packing company for today’s cartons. [1][2]

Where are Kirkland Protein Bars products made?

A current protein-bar production country and plant are Unconfirmed in these sources. Costco’s brand ownership does not establish manufacture at its Washington corporate address. [1][2][3]

Is Kirkland Protein Bars made in China or the USA?

Neither a US-only nor a China-made claim is established for the entire range. Check the current carton’s origin statement and use its lot information when seeking confirmation. [2]

Same factory, different label

The 2016 letter lists nut bars and protein bars as separate introductions. Evidence about another Kirkland snack, or a similar Quest recipe, does not identify the protein-bar supplier. [1]

Compare the sourced ownership and manufacturing guides: Kirkland SignatureKirkland CoffeeKirkland Olive OilCostco Hot DogsGreat ValueMember’s MarkonnKirkland BatteriesKirkland Dog FoodKirkland BourbonKirkland Golf BallsKirkland Toilet PaperKirkland TequilaKirkland DiapersKirkland paper towelsKirkland VodkaKirkland cat foodKirkland FormulaKirkland waterKirkland whiskeyKirkland Wine

Ownership timeline

  1. 2016: Costco reported introducing Kirkland protein bars. [1]
  2. 2018: Published its supplier collaboration and traceability framework. [2]
  3. 2025: Marked 30 years of the Kirkland Signature trademark. [3]

Frequently asked questions

4 questions about this supply chain, answered from the records above.

Who makes kirkland protein bars?

Costco’s 2016 shareholder letter specifically lists protein bars among its new Kirkland food items. Its supplier and traceability disclosures do not identify the mixing, forming or packing company for today’s cartons.[1][2]

Who owns kirkland?

Kirkland Signature is Costco’s private label. Its 2025 annual report marks the trademark’s 30th anniversary.[3]

Where are kirkland protein bars made?

A current protein-bar production country and plant are Unconfirmed in these sources. Costco’s brand ownership does not establish manufacture at its Washington corporate address.[1][2][3]

Who makes kirkland signature protein bars?

Costco’s 2016 shareholder letter specifically lists protein bars among its new Kirkland food items. Its supplier and traceability disclosures do not identify the mixing, forming or packing company for today’s cartons.[1][2]

Sources and scope

Year-only source dates denote the report’s coverage year. Dated disclosures establish the facts described at that time. Plant output, contracts and ownership can change; this is a selected map, not a complete supplier census.

  1. [1] Costco 2016 Annual Report — 2016 · Primary source · Reviewed 2026-10-21.

    The shareholder letter explicitly includes protein bars among new Kirkland food products introduced in 2016.

  2. [2] Costco 2018 Sustainability Commitment archive — 2018 · Primary source · Reviewed 2026-10-21.

    Describes Kirkland supplier collaboration and traceability, including milling and bottling Toscano PGI oil in Tuscany and distinct olive-oil origins.

  3. [3] Costco 2025 Annual Report — 2025 · Primary source · Reviewed 2026-10-21.

    Identifies Kirkland as Costco’s private label; shareholder letter marks its 30th anniversary and expanded meat and coffee manufacturing.

Unconfirmed

  • Current physical manufacturer, plant and country by flavor and pack; claims that Quest or Come Ready Foods makes every Kirkland protein bar.