# EDGAR Filing Document

**Accession Number:** 0000909832
**File Stem:** 0000909832-26-000048
**Filing Date:** 2026-5
**Character Count:** 27679
**Document Hash:** 328938e777053e2deeb1e06f36dcc557
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000909832-26-000048.hdr.sgml**: 20260529

**ACCESSION NUMBER**: 0000909832-26-000048

**CONFORMED SUBMISSION TYPE**: SD

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20260529

**DATE AS OF CHANGE**: 20260528

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** COSTCO WHOLESALE CORP /NEW
- **CENTRAL INDEX KEY:** 0000909832
- **STANDARD INDUSTRIAL CLASSIFICATION:** RETAIL-VARIETY STORES [5331]
- **ORGANIZATION NAME:** 07 Trade & Services
- **EIN:** 911223280
- **STATE OF INCORPORATION:** WA
- **FISCAL YEAR END:** 0830

**FILING VALUES:**
- **FORM TYPE:** SD
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 000-20355
- **FILM NUMBER:** 261038353

**BUSINESS ADDRESS:**
- **STREET 1:** 999 LAKE DRIVE
- **CITY:** ISSAQUAH
- **STATE:** WA
- **ZIP:** 98027-
- **BUSINESS PHONE:** 4253138100

**MAIL ADDRESS:**
- **STREET 1:** 999 LAKE DRIVE
- **CITY:** ISSAQUAH
- **STATE:** WA
- **ZIP:** 98027

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** COSTCO COMPANIES INC
- **DATE OF NAME CHANGE:** 19970401

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** PRICE/COSTCO INC
- **DATE OF NAME CHANGE:** 19930728

**UNITED STATES** 

**SECURITIES AND EXCHANGE COMMISSION** 

**Washington, D.C. 20549**

**FORM SD**

**SPECIALIZED DISCLOSURE REPORT**

**Costco Wholesale Corporation**

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| | | |
|:---|:---|:---|
| (Exact name of the registrant as specified in its charter) | (Exact name of the registrant as specified in its charter) | (Exact name of the registrant as specified in its charter) |
| **Washington** | **000-20355** | **91-1223280** |
| (State or other jurisdiction of incorporation or organization) | (Commission File Number) | (I.R.S. Employer Identification No.) |
| **999 Lake Drive, Issaquah, WA** |  | **98027** |
| (Address of principal executive offices) |  | (Zip Code) |
|  | John Sullivan |  |
|  | (425) 313-8100 |  |
| (Name and telephone number, including area code, of the<br>person to contact in connection with this report.) | (Name and telephone number, including area code, of the<br>person to contact in connection with this report.) | (Name and telephone number, including area code, of the<br>person to contact in connection with this report.) |

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Check the appropriate box to indicate the rule pursuant to which this form is being filed, and provide the period to which the information in this form applies:

☒&nbsp;&nbsp;&nbsp;&nbsp;Rule 13p-1 under the Securities Exchange Act (17 CFR 240.13p-1) for the reporting period from January 1 to December 31, 2025.

☐&nbsp;&nbsp;&nbsp;&nbsp;Rule 13q-1 under the Securities Exchange Act (17 CFR 240.13q-1) for the fiscal year ended ________.

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**Section 1 - Conflict Minerals Disclosure**

**Introduction**

Costco Wholesale Corporation (Costco or the Company), a Washington corporation, and its subsidiaries operate membership warehouses and e-commerce sites. On December 31, 2025, Costco operated 923 warehouses worldwide. In accordance with Rule 13p-1 under the Securities Exchange Act of 1934 (Rule 13p-1), Costco files this Specialized Disclosure Form (Form SD). A copy of Costco Wholesale Corporation's Form SD is publicly available at <u>https://investor.costco.com</u>.

**SEC Final Rule Applicability Determination**

To comply with Rule 13p-1, Costco followed a three-step process: first, determine the applicability of the rule to the Company's products; second, conduct a "reasonable country of origin inquiry" (RCOI) to determine whether there is reason to believe that tin, tungsten, tantalum or gold (3TG), also referred to as conflict minerals, are present in and necessary for the functionality or production of the Company's products were sourced from the Democratic Republic of Congo or adjoining countries (collectively, DRC or covered countries); and third, conduct due diligence to determine the source and chain of custody of those conflict minerals, unless the Company has no reason to believe its necessary conflict minerals were sourced from a covered country based on the RCOI.

**RCOI Description** 

Costco is required to conduct an RCOI on products that we manufacture or contract to manufacture that contain 3TG necessary for the functionality or production of the product. In assessing which of our products are in scope of Rule 13p-1, we believe that we have interpreted "contract to manufacture" broadly for purposes of this filing. Costco's objective is that our sourcing practices not support armed conflict or human rights abuses in the DRC.

To aid in identifying suppliers to include in its RCOI, Costco provided a third-party service, Source Intelligence (SI), with descriptive information for nonfood products that Costco sold during 2025, including whether Costco may have manufactured or contracted to manufacture those products. SI reviewed the product data using automated queries and a detailed quality-control check to determine which of those products might contain 3TG. If SI had doubt regarding the use of 3TG in products, the suppliers of the products were initially included in the RCOI process.

The products SI initially flagged as potentially in-scope due to their likelihood of containing 3TG were those that are electronic or electrical, solar powered, contained any kind of metal (e.g., metal covering including alloys or metal hardware), or had unclear material content. The Company's scoping inquiry included nonfood products sold in the United States, Canada, Mexico, United Kingdom, Japan, Korea, Taiwan, China, Australia, Iceland, France, Spain, New Zealand, and Sweden.

Next, Tier 1 suppliers (those selling directly to the Company) were asked to confirm whether the products they supplied contain 3TG that are necessary to the functionality or production of the product and whether Costco contracted with the supplier to manufacture the product or Costco influenced the manufacturing, and whether the products were supplied to Costco during the 2025 reporting year. This information was used to determine which of our suppliers were in-scope for RCOIs. If in-scope, SI asked the suppliers to provide additional conflict minerals information. Suppliers were then engaged to collect information regarding the presence and sourcing of 3TG used in items sold to Costco.

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**Reasonable Country of Origin Inquiry (RCOI)**

SI engaged Costco's Tier 1 suppliers to collect information about the presence and sourcing of 3TG used in the products and components supplied to Costco. The program utilized the Responsible Minerals Initiative's (RMI) Conflict Minerals Reporting Template (CMRT). Only supplier reports using CMRT's version 6.4 or higher were accepted.

**<u>Supplier Engagement</u>**

Costco provided SI with methods of contact for each supplier designated as in-scope. Generally, Costco and SI used email as the primary method of communication. The RCOI began with an introduction email from Costco to suppliers describing the Conflict Minerals Compliance Program (CMCP) requirements and identifying SI as a partner. SI then sent a subsequent email to suppliers containing a registration and survey request link for the online data collection platform. To increase awareness of the CMCP, the initial registration email sent to Costco's suppliers provided them with guidance on the regulations and frequently asked questions concerning 3TG mineral tracing. Following the initial introductions to the program and information request, up to 10 reminder emails requesting survey completion were sent to each non-responsive supplier.

**<u>Escalation</u>**

If after these efforts a supplier still did not register with the system or provide the information requested, an escalation process was initiated. It consisted of direct outreach by Costco. We contacted these suppliers by email to request their participation. SI also followed up with a re-invitation to the platform.

**<u>Information Requested</u>**

Suppliers were given a final deadline of March 30, 2026 to provide information about the mineral processors in their supply chains. Suppliers were asked to provide information regarding the sourcing of their conflict minerals, with the ultimate goal of identifying the 3TG smelters or refiners (SORs) and the country of origin of the 3TG. Suppliers who had already performed an RCOI through the use of the CMRT were asked to upload this document into the SI system or to provide this information in the online survey version. Suppliers had the ability to share information at a level with which they were most comfortable, i.e., company, product or user-defined, but the scope of the declaration had to be specified. Suppliers were asked to provide an electronic signature before submitting their data to Costco to verify that all answers submitted were accurate to the best of the supplier's knowledge.

**<u>Quality Assurance</u>**

Supplier responses were evaluated by SI and Costco's Conflict Mineral Team for plausibility, consistency, and completeness. Additional supplier outreach was conducted to attempt to resolve potential quality control flags, including:

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• One or more smelter or refiners (SORs) were noted for a metal not listed as being in the product;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• SOR information was not provided for a used metal, or SOR information provided was not a verified metal processor;<sup>1</sup>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Supplier answered "yes" to sourcing from the covered countries but none of the SORs listed are known to source from the region;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Supplier indicated that it had not received conflict minerals data for each metal from all suppliers;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Supplier indicated it had not identified all of the SORs used for the products included in the declaration scope;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Supplier indicated it had not provided all applicable SOR information; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Supplier indicated 100% of the 3TG for products covered by the declaration originated from scrap/recycled sources, but one or more SORs listed are not known to be exclusively recyclers.

**RCOI Results** 

A total of 183 Tier 1 suppliers were flagged as potentially in-scope and contacted as part of the RCOI process. The response rate was 96%. Of the 183 suppliers flagged, 92 (50%) were determined to be in-scope. Of these, 57 (62%) indicated one or more of the regulated metals (3TG) as necessary to the functionality or production of the products supplied to Costco and that Costco "contracted to manufacture the products." Based on SI's smelter/refiner database, plus the RMI Responsible Minerals Assurance Process (RMAP), there was an indication of potential sourcing from the DRC and covered countries for 37 out of 271 verified smelters/refiners.<sup>2</sup>

**Due Diligence**

For supply chains with SORs that are known or thought to be sourcing from the DRC, additional investigation was conducted to determine the source and chain-of-custody of the regulated metals. Costco and SI relied on the following internationally accepted audit standards to determine which SORs are considered "DRC Conflict Free": the RMAP, the London Bullion Market Association Good Delivery Program, and the Responsible Jewellery Council Chain-of-Custody Certification.

SI assigned red flags to SORs where there was evidence of sourcing from: an RMI Level 2 country, meaning low to medium risk countries with known or plausible involvement in the smuggling, export or transit of mineral out of conflict affected regions; or from an RMI Level 3 country meaning high-risk countries outlined in Section 1502 of the Dodd-Frank Act as those affected or bordering conflict-affected regions: currently defined as the DRC and covered countries. If any of these SORs was not certified, Costco required its supplier to address the SOR by either moving it toward certification or eliminating it from the supply chain.

Costco also attended periodic RMI plenary conference calls to discuss emerging issues and best practices on responsible mineral sourcing and to work on addressing shared challenges. In addition, SI is an official vendor

<sup>1</sup> SI maintains a smelter/refiner database, which includes verified metal processors, companies that are exclusively recyclers, mine country of origin information, and DRC conflict-free certification status. SI collects SOR data submitted by suppliers in CMRTs and compares it against its existing database. Supplier responses listing entities that are not verified smelters/refiners are flagged and suppliers are asked for further clarification.

<sup>2</sup> The information in the smelter/refiner database begins with supplier-provided information (CMRT data); Source Intelligence then performs additional research (internet, industry and government associations) and outreach (email and telephone) directly with these companies to confirm the data provided via CMRTs. The Source Intelligence Smelter Verification and Outreach Process includes research in an attempt to verify types of metal processing performed (including exclusive recycling), mine countries of origin, conflict-free certification status, and due diligence measures being conducted for those entities that are not conflict-free certified.

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member of the RMI, to further facilitate the exchange of supply chain data and technical information. This membership provides SI access to the following working groups: Engage with the CMRT Development Team, Smelter Engagement Team, Smelter Data Management Team, RMI Stakeholders Call, and RMI Plenary.

**<u>Due Diligence Summary</u>**

As a result of the information provided by our suppliers for reporting year 2025 and SI's research, there were 36 certified conflict-free SORs with indications of sourcing from an RMI Level 2 country and 35 certified conflict-free SORs with indications of sourcing from an RMI Level 3 country.

In addition, the research identified three non-certified SORs with evidence of sourcing from an RMI Level 2 or 3 country, as shown in the table below:

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| | | | | |
|:---|:---|:---|:---|:---|
| **Official Smelter Name** | **Smelter Country** | **RMI Smelter ID** | **Mine Country of Origin** | **RMI COO Risk Level** |
| Ganzhou Jiangwu Ferrotungsten Co., Ltd. | CHINA | CID002315 | DRC | 3 |
| Hunan Jintai New Material Co., Ltd. | CHINA | CID000769 | MOZAMBIQUE | 2 |
| Malaysia Smelting Corporation (MSC) | MALAYSIA | CID001105 | DRC | 2 & 3 |
| Malaysia Smelting Corporation (MSC) | MALAYSIA | CID001105 | DRC | 2 & 3 |
| Malaysia Smelting Corporation (MSC) | MALAYSIA | CID001105 | DRC | 2 & 3 |

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While Malaysian Smelting Corporation (CID001105) may have contributed to our product components during the 2025 reporting period, it has since ceased operations.

**Section 2 - Resource Extraction Issuer Disclosure and Report**

Not applicable.

**Section 3 - Exhibits**

The following exhibit is filed as part of this report:

Exhibit 1.01 - Conflict Minerals Report

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the duly authorized undersigned.

**Costco Wholesale Corporation**

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| | | |
|:---|:---|:---|
| By: | /s/ GARY MILLERCHIP | May 28, 2026 |
|  | Gary Millerchip | Date |
|  | Executive Vice President and Chief Financial Officer |  |

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## Exhibit 1.01

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

**Conflict Minerals Report of Costco Wholesale Corporation**

**Reporting Year 2025**

This Conflict Mineral Report (CMR) of Costco Wholesale Corporation (Costco or the Company) is made for calendar year 2025.

Costco has initiated measures to exercise due diligence on the source and chain of custody of the tin, tantalum, tungsten and gold (3TG or conflict minerals) found in products it contracts to manufacture and that are necessary for the functionality or production of the products. The goal is to determine whether smelters and refiners within the Company's supply chain sourced conflict minerals from the Democratic Republic of Congo and surrounding area (DRC or covered countries). The Company based its due diligence process on the Organization for Economic Cooperation and Development (OECD) guidelines and accompanying Supplements (OECD Framework).<sup>1</sup> The OECD Framework identifies five due diligence steps:

&nbsp;&nbsp;&nbsp;&nbsp;**1:** Establish Strong Company Management Systems

**&nbsp;&nbsp;&nbsp;&nbsp;2:** Identify and Assess Risk in the Supply Chain

**&nbsp;&nbsp;&nbsp;&nbsp;3:** Design and Implement a Strategy to Respond to Identified Risks

**&nbsp;&nbsp;&nbsp;&nbsp;4:** Carry Out Independent Third-Party Audit of Supply Chain Due Diligence at Identified Points in the

Supply Chain

**&nbsp;&nbsp;&nbsp;&nbsp;5:** Report on Supply Chain Due Diligence

Our implementation of the OECD Framework generally consisted of the following:

**1. Establish Strong Company Management Systems**

The Company identified product categories (which it refers to as departments) it believed were reasonably likely to contain conflict minerals. These included: health and beauty aids, office supplies, hardware, automotive accessories, sporting goods, lawn & garden, toys & seasonal, apparel, housewares, small electrics, major appliances, domestics, jewelry/luggage/handbags, and furniture.

*Adopt a Conflict Minerals Policy*

The Company has adopted a Conflict Minerals Policy Statement (Policy).

<u>https://www.costco.com/sustainability-resources-updates.html</u>.

*Structure internal management to support supply chain due diligence*

Staff members with appropriate authority and responsibility were established and adequately resourced to oversee the supply chain due diligence process. Communication channels were in place to ensure critical information reached relevant employees and suppliers.

*Establish a System of Controls and Transparency over the Mineral Supply Chain*

To provide better transparency within Costco's supply chains and to help facilitate communication with international suppliers, Costco engaged a third-party information service provider, Source Intelligence (SI), to complement internal management processes.

*Strengthen company engagement with suppliers*

<sup>1</sup> *OECD Due Diligence Guidance for Responsible Supply Chains of Minerals from Conflict-Affected and High-Risk Areas: Third Edition*, OECD Publishing, Paris (2016). <u>https://www.oecd.org/daf/inv/mne/OECD-Due-Diligence-Guidance-Minerals-Edition3.pdf.</u>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

Suppliers identified as potentially being in-scope for the Company's due-diligence efforts were provided with communication laying out: a) Costco's expectations on responsible supply chains of minerals from conflict-affected and high-risk areas, b) a detailed overview of Costco's annual Conflict Minerals reporting program and what is required of suppliers, and c) the potential for business interruption for non-compliance. Multiple sources of information were also provided to help suppliers learn more about relevant areas of risk.

*Establish a Company-level Grievance Mechanism*

Our Confidential Ethics Hotline can be utilized by members, suppliers and other interested parties to report (among other things) complaints or violations of Costco's policies or the law, including the Conflict Minerals Policy.

<u>www.costco.ethicspoint.com</u>.

**2.&nbsp;&nbsp;&nbsp;&nbsp;Identify and Assess Risk in the Supply Chain**

Costco is committed to tracing the origin of its necessary conflict minerals so that it avoids supporting armed conflict or human rights abuses in the covered countries. The Company's scoping inquiry included nonfood products sold in the United States, Canada, Mexico, United Kingdom, Japan, Korea, Taiwan, China, Australia, Spain, Iceland, France, New Zealand, and Sweden. The Company sought to identify nonfood products that may possibly be the subject of "contract to manufacture" agreements or that the Company may possibly have "influenced the manufacturing."

*Identify the Smelters or Refiners (SORs) in the supply chain*

Costco took steps to identify and verify SORs and the source of conflict minerals through a country of origin inquiry. See Specialized Disclosure Report (Form SD) for reporting year 2025 filed in accordance with Rule 13p-1 under the Securities Exchange Act of 1934.

After determining products to include in its due diligence efforts, the Company identified suppliers potentially in scope from a list of the Company's purchase orders for products it purchased and received during 2025. Costco implemented a process to engage those suppliers, including, but not limited to, facilitating the identification of upstream participants in the chain of custody. Costco engaged SI to identify conflict minerals processors in Costco's supply chains and collect, store, and review information on 3TG sourcing practices. Communications were sent to the Company's direct suppliers describing the compliance requirements and requesting conflict minerals information.

Suppliers were requested to use the Responsible Minerals Initiative's (RMI) Conflict Minerals Reporting Template (CMRT), to identify 3TG SORs and associated countries of origin. SI advised suppliers that it tracks information on SORs and flags risks based on smelter or refiner sourcing practices. SI verified the SORs were matched against available lists of processors that have been certified by internationally-recognized industry validation schemes, such as the RMI Responsible Minerals Assurance Process (RMAP).

**3.&nbsp;&nbsp;&nbsp;&nbsp;Design and Implement a Strategy to Respond to Identified Risks**

*Due Diligence Strategy* 

For supply chains with SORs that are known or thought to be sourcing from the DRC, additional investigation was conducted to determine the source and chain-of-custody of the regulated metals. Costco and SI relied upon the following internationally accepted audit standards: the RMAP; the London Bullion Market Association (LBMA) Good Delivery Program; and the Responsible Jewellery Council (RJC) Chain-of-Custody Certification.

SI assigned red flags to SORs where there is evidence of sourcing from an RMI Level 2 country, meaning low to medium risk countries with known or plausible involvement in the smuggling, export or transit of minerals out of conflict affected regions; or from an RMI Level 3 country, meaning high-risk countries outlined in Section 1502 of the Dodd-Frank Act as those affected or bordering conflict-affected regions: currently defined as the Democratic

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

Republic of Congo and its nine adjoining countries (Angola, Burundi, Central African Republic, Republic of the Congo, Rwanda, South Sudan, Tanzania, Uganda, Zambia).

The Company used its membership in RMI to assess risks in the supply chain. Costco attends RMI's periodic plenary conference calls to discuss emerging issues and best practices on responsible mineral sourcing and to work on addressing shared challenges. Additionally, the RMI provides a range of tools and resources, including the RMAP, the Conflict Minerals Reporting Template, Reasonable Country of Origin Inquiry data and a range of guidance documents on conflict mineral sourcing. See <u>www.responsiblemineralsinitiative.org/.</u>

SI is an official vendor member of the RMI, to further facilitate the exchange of supply chain data and technical information. This membership provides access to the following working groups: Engage with the CMRT Development Team, Smelter Engagement Team, Smelter Data Management Team, RMI Stakeholders Call, and RMI Plenary.

*Due Diligence Summary*

The results of the information provided by our suppliers and SI's research revealed that: (1) there were 36 certified conflict-free SORs with indications of sourcing from an RMI Level 2 country; and (2) 35 certified conflict-free SORs with indications of sourcing from an RMI Level 3 country.

In addition, the research identified three non-certified SORs with evidence of sourcing from an RMI Level 2 or 3 country, as shown in the table below:

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| | | | | |
|:---|:---|:---|:---|:---|
| **Official Smelter Name** | **Smelter Country** | **RMI Smelter ID** | **Mine Country of Origin** | **RMI COO Risk Level** |
| Ganzhou Jiangwu Ferrotungsten Co., Ltd. | CHINA | CID002315 | DRC | 3 |
| Hunan Jintai New Material Co., Ltd. | CHINA | CID000769 | MOZAMBIQUE | 2 |
| Malaysia Smelting Corporation (MSC) | MALAYSIA | CID001105 | DRC | 2 & 3 |
| Malaysia Smelting Corporation (MSC) | MALAYSIA | CID001105 | DRC | 2 & 3 |
| Malaysia Smelting Corporation (MSC) | MALAYSIA | CID001105 | DRC | 2 & 3 |

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While Malaysian Smelting Corporation (CID001105) may have contributed to our product components during the 2025 reporting period, it has since ceased operations.

The final conflict minerals findings were reported to leadership on April 13, 2026.

*Steps to Be Taken* 

The Company is taking the following steps in 2026 to seek to lessen the risk that its in-scope suppliers' 3TG may benefit armed groups in the DRC region:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1.Address non-certified SORs to move them toward certification or remove them from the supply chain;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2.Continue to ensure all SORs in the supply chain maintain certification;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;3.Continue to educate our buyers on the importance of our Conflict Minerals Policy;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;4.Continue to engage with and promote industry-based efforts to educate suppliers on the Conflict Minerals Rule, including supporting the work of the RMI;

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.Continue to enforce risk management procedures that, in particular, address supplier non-responsiveness and non-compliance; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;6.Encourage our suppliers to provide the product level information for 2026 through ongoing outreach with suppliers and buyer education.

4.&nbsp;&nbsp;&nbsp;&nbsp;**Carry Out Independent Third-Party Audit of Supply Chain Due Diligence at Identified Points in the Supply Chain** 

For Costco's due diligence, we used information we gathered along with information made available by the RMAP, RMI, LBMA, SI, and RJC. Costco does not directly do business with any smelters or refiners of 3TG. We rely upon our suppliers to provide accurate information about 3TG in our supply chain. In most instances, we are several tiers removed from the smelters and refiners of 3TG used in our consumer products.

**5.&nbsp;&nbsp;&nbsp;&nbsp;Report on Supply Chain Due Diligence**

The Form SD and CMR, publicly available at <u>https://investor.costco.com</u>, meet the OECD recommendation to report annually on supply chain due diligence. Please note that Costco relies on the accuracy and completeness of supplier-provided data to complete this report.

<br>