# EDGAR Filing Document

**Accession Number:** 0001000230
**File Stem:** 0001437749-26-018253
**Filing Date:** 2026-5
**Character Count:** 34586
**Document Hash:** ef464ac74aa787207fbf34c706c93662
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001437749-26-018253.hdr.sgml**: 20260522

**ACCESSION NUMBER**: 0001437749-26-018253

**CONFORMED SUBMISSION TYPE**: SD

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20260522

**DATE AS OF CHANGE**: 20260522

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** OPTICAL CABLE CORP
- **CENTRAL INDEX KEY:** 0001000230
- **STANDARD INDUSTRIAL CLASSIFICATION:** DRAWING AND INSULATING NONFERROUS WIRE [3357]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 541237042
- **STATE OF INCORPORATION:** VA
- **FISCAL YEAR END:** 1031

**FILING VALUES:**
- **FORM TYPE:** SD
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 000-27022
- **FILM NUMBER:** 261014042

**BUSINESS ADDRESS:**
- **STREET 1:** 5290 CONCOURSE DR
- **CITY:** ROANOKE
- **STATE:** VA
- **ZIP:** 24019
- **BUSINESS PHONE:** 5402650690

**MAIL ADDRESS:**
- **STREET 1:** 5290 CONCOURSE DRIVE
- **CITY:** ROANOKE
- **STATE:** VA
- **ZIP:** 24019

**UNITED STATES** 

**SECURITIES AND EXCHANGE COMMISSION** 

**Washington, D.C. 20549** 

------

**FORM SD** 

**SPECIALIZED DISCLOSURE REPORT**

------

## OPTICAL CABLE CORPORATION
**(Exact name of registrant as specified in its charter)** 

------

---

| | | |
|:---|:---|:---|
| **Virginia** | **000-27022** | **54-1237042** |
| **(State or other jurisdiction of**<br> **incorporation or organization)** | **(Commission**<br> **File Number)**  | **(I.R.S. Employer**<br> **Identification Number)** |
| **5290 Concourse Drive**<br> **Roanoke, VA** | **5290 Concourse Drive**<br> **Roanoke, VA** | **24019** |
| **(Address of principal executive offices)**  | **(Address of principal executive offices)**  | **(Zip Code)** |
| **Tracy G. Smith** | **Tracy G. Smith** | **(540) 265-0690** |
| **(Name and telephone number including area code, of the person to contact in connection with this report)** | **(Name and telephone number including area code, of the person to contact in connection with this report)** | **(Name and telephone number including area code, of the person to contact in connection with this report)** |

---

------

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.

------

**Section 1** – **Conflict Minerals Disclosure**

**Item 1.01** – **Conflict Minerals Disclosure**

*Company Overview*

Optical Cable Corporation (or OCC®) manufactures a broad range of fiber optic and copper data communication cabling and connectivity solutions. OCC's products include fiber optic and copper cabling, fiber optic and copper connectors, specialty fiber optic and copper connectors, fiber optic and copper patch cords, pre-terminated fiber optic and copper cable assemblies, racks, cabinets, datacom enclosures, patch panels, face plates, multi-media boxes, and other cable and connectivity management accessories.

*Conflict Minerals Disclosure*

Section 1502(e)(4) of the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010 ("the Act") defines conflict minerals as columbite-tantalite (tantalum), cassiterite (tin), wolframite (tungsten) and gold, commonly referred to collectively as "3TG". OCC evaluated its current product lines and determined that certain manufactured products contain 3TG.

Certain of the 3TG minerals are contained in some of the wire and metal components used by OCC in the connector manufacturing process. On a more limited basis, OCC uses certain 3TG minerals in the production of products in its fiber optic cable product lines.

OCC does not make direct purchases of raw ore or unrefined minerals or any direct purchases from recycled or scrap sources, and makes no direct purchases in the Democratic Republic of the Congo ("DRC") or its adjoining countries. OCC has conducted a country of origin inquiry in good faith by identifying suppliers of the parts used in OCC products that are likely to contain 3TG and requesting that suppliers respond with a completed Conflict-Free Sourcing Initiative ("CFSI") Conflict Minerals Reporting Template. This template facilitates disclosure and communication of information regarding the origin of conflict minerals, smelters that provide material to a company's supply chain, and supplier due diligence.

OCC's due diligence measures included:

- Conducting a supply chain survey with all suppliers of components that contain 3TG using the CFSI Conflict Minerals Reporting Template.

- Tracking and reviewing responses to assess reliability.

- Following up with suppliers who failed to return responses or returned incomplete or inconsistent responses. OCC received valid responses from 32 of 36 surveyed suppliers.

- Reviewing the smelters and refiners identified in the supply chain survey to determine location of the smelters and refiners indicated by the respondent and that the respondent has provided an indication of the smelters and refiners "conflict free" status.

- Making additional inquiries of respondents if questions arose as to the "conflict free" status.

Forty-seven percent of the suppliers who responded to the survey reported that the 3TG minerals in the parts they sell to OCC did not originate in the DRC or adjoining countries. However, the remaining suppliers reported that the minerals contained in their products may have originated in the DRC or adjoining countries, or were unable to specify the origin of the minerals. Please see the attached Conflict Minerals Report (Exhibit 1.01). Based on the information received, OCC does not have sufficient information to determine whether the necessary 3TG minerals contained in our products directly or indirectly financed or benefited armed groups in the DRC or its adjoining countries.

------

A copy of OCC's conflict minerals disclosure herein is publicly available at: <u>www.occfiber.com</u> under "Investor Relations".

**Item 1.02 Exhibit**

The Conflict Minerals Report required by Item 1.01 is filed as [Exhibit 1.01](ex_966590.htm) to this Form SD.

**Section 2** – **Resource Extraction Issuer Disclosure**

**Item 2.01 Resource Extraction Issuer Disclosure and Report**

Not applicable

**Section 3** – **Exhibits**

**Item 3.01 Exhibits**

The Conflict Minerals Report required by Item 1.01 is filed as [Exhibit 1.01](ex_966590.htm) to this Form SD.

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.

---

| | |
|:---|:---|
| OPTICAL CABLE CORPORATION | OPTICAL CABLE CORPORATION |
| By: | /s/ Tracy G. Smith |
| Name: | Tracy G. Smith |
| Title: | Executive Vice President and Chief Financial Officer |

---

Dated: May 22, 2026

## Exhibit 1.01

**Exhibit 1.01**

**CONFLICT MINERALS REPORT**

Optical Cable Corporation (or OCC®) has performed the following due diligence measures to determine whether the 3TG minerals included in our products financed or benefited armed groups in the Democratic Republic of the Congo ("DRC") or its adjoining countries:

**<u>Step 1. Establish Strong Company Management Systems</u>**

*Control Systems*

OCC engages in industry-wide initiatives to enhance supply chain responsibility and to keep abreast of industry best practices. OCC conducted a supply chain survey with all suppliers of components that contain 3TG minerals using the Conflict-Free Sourcing Initiative ("CFSI") Conflict Minerals Reporting Template. OCC then reviewed the results of the supply chain survey and retained documentation relevant to the use of any 3TG minerals.

*Supplier Engagement* 

OCC has a strong level of engagement with its direct suppliers and, when necessary, directly engages their upstream suppliers. OCC expects our suppliers to practice responsible sourcing and to cooperate with OCC's conflict minerals reporting and due diligence efforts. OCC reviewed the smelters and refiners identified in the supply chain survey to determine location of the smelters and refiners indicated by the respondent and that the respondent has provided an indication of the smelters and refiners "conflict free" status and made additional inquiries if questions arose as to the "conflict free" status.

**<u>Step 2. Identify and Assess Risks in the Supply Chain</u>**

OCC engages with its direct suppliers and, when believed to be necessary, their upstream suppliers to evaluate the source of 3TG minerals in its products. Upon receiving a supplier CFSI Reporting Template, members of the OCC conflict minerals diligence team review the information for consistency and accuracy. When a report warrants clarification or confirmation, a member of the OCC conflict minerals diligence team contacts the direct supplier, or in some cases their upstream supplier, to clarify or confirm the information and responses.

**<u>Step 3. Design and Implement a Strategy to Respond to Identified Risks</u>**

OCC performs a risk assessment to identify areas of possible concern within its supply chain, evaluating areas of possible concern and deploying appropriate risk mitigation controls and strategies.

OCC continues to look for ways to enhance its conflict minerals compliance program, including the processes outlined above. In addition, OCC intends to continue collaborating with its suppliers to promote responsible sourcing of conflict minerals. To accomplish this objective, OCC will continue outreach and education efforts among its suppliers to promote industry best practices.

One area for further mitigating risk in OCC's supply chain is to identify the countries of origin of all 3TG minerals in its products. Many of OCC's suppliers routinely provide responses at a supplier-wide level, and not specifically with respect to the component materials that these suppliers supplied to OCC. We have improved our risk assessment by requesting that all CFSI Reporting Templates be completed at the product level and by providing a list of relevant products purchased from each supplier to aid in completion. However, many suppliers still provide responses at a supplier-wide level only.

------

**<u>Step 4. Carry Out Independent Third-Party Audit of Smelter/Refiner</u>**<u>'</u>**<u>s Due Diligence Practices</u>**

If necessary, and to the extent OCC could reasonably do so, OCC would provide information requested in connection with audits of conflict minerals smelters and refiners conducted by third parties.

**<u>Step 5. Report Annually on Supply Chain Due Diligence</u>**

This report constitutes OCC's annual report on its conflict minerals due diligence and is publicly available on the Company's website. The information contained in, and that can be accessed through, the website of the Company is not, and shall not be deemed to be, a part of this report or the related Form SD or incorporated into any other filings Optical Cable Corporation makes with the SEC.

The following table is a list of smelters provided by OCC's suppliers that directly or indirectly provide 3TG minerals to such suppliers which possibly may have materials sourced from the DRC or its adjoining countries. As described herein, OCC is not able to determine with certainty if any of its products may or may not include materials that have been sourced from the DRC or its adjoining countries because (1) many of OCC's suppliers are unable to determine if they received any 3TG minerals from upstream suppliers which include materials that have been sourced from the DRC or its adjoining countries, and (2) many of OCC's suppliers routinely provide responses at a supplier-wide level, and not specifically with respect to the component materials that these suppliers used in products supplied to OCC.

OCC requests suppliers who sell OCC materials that contain 3TG minerals to complete CFSI Reporting Templates and when believed appropriate OCC makes additional inquiries of such suppliers, and in some cases the suppliers of OCC's suppliers, as part of OCC's diligence supporting its conflict minerals reporting. Based on the information OCC has been able to obtain from its suppliers of materials that contain 3TG minerals through such questionnaires and inquires, OCC was unable to determine whether materials from suppliers contain 3TG minerals that may have been sourced from the DRC or its adjoining countries, whether such minerals were sourced from recycled or scrap sources, or whether such minerals directly or indirectly financed or benefited armed groups.

------

---

| | | |
|:---|:---|:---|
| PRODUCT MINERAL | SMELTER | COUNTRY |
| Gold | 8853 S.p.A. | ITALY |
| Gold | ABC Refinery Pty Ltd. | AUSTRALIA |
| Gold | Abington Reldan Metals, LLC | UNITED STATES OF AMERICA |
| Gold | Advanced Chemical Company | UNITED STATES OF AMERICA |
| Gold | African Gold Refinery | UGANDA |
| Gold | Agosi AG | GERMANY |
| Gold | Aida Chemical Industries Co., Ltd. | JAPAN |
| Gold | Al Etihad Gold Refinery DMCC | UNITED ARAB EMIRATES |
| Gold | Albino Mountinho Lda. | PORTUGAL |
| Gold | Alexy Metals | UNITED STATES OF AMERICA |
| Gold | Almalyk Mining and Metallurgical Complex (AMMC) | UZBEKISTAN |
| Gold | AngloGold Ashanti Corrego do Sitio Mineracao | BRAZIL |
| Gold | Argor-Heraeus S.A. | SWITZERLAND |
| Gold | ASAHI METALFINE, Inc. | JAPAN |
| Gold | Asahi Pretec Corp. | JAPAN |
| Gold | Asahi Refining Canada Ltd. | CANADA |
| Gold | Asahi Refining USA Inc. | UNITED STATES OF AMERICA |
| Gold | Asaka Riken Co., Ltd. | JAPAN |
| Gold | Atasay Kuyumculuk Sanayi Ve Ticaret A.S. | TURKEY |
| Gold | Attero Recycling Pvt Ltd | INDIA |
| Gold | AU Traders and Refiners | SOUTH AFRICA |
| Gold | Augmont Enterprises Private Limited | INDIA |
| Gold | Aurubis AG | GERMANY |
| Gold | Bangalore Refinery | INDIA |
| Gold | Bangko Sentral ng Pilipinas (Central Bank of the Philippines) | PHILIPPINES |
| Gold | Boliden Ronnskar | SWEDEN |
| Gold | C. Hafner GmbH + Co. KG | GERMANY |
| Gold | Caridad | MEXICO |
| Gold | CCR Refinery - Glencore Canada Corporation | CANADA |
| Gold | Cendres + Metaux S.A. | SWITZERLAND |
| Gold | CGR Metalloys Pvt Ltd. | INDIA |
| Gold | Chimet S.p.A. | ITALY |
| Gold | China's Shandong Gold Mining Co., Ltd | CHINA |
| Gold | Chugai Mining | JAPAN |
| Gold | Coimpa Industrial LTDA | BRAZIL |
| Gold | Daye Non-Ferrous Metals Mining Ltd. | CHINA |
| Gold | Degussa Sonne / Mond Goldhandel GmbH | GERMANY |
| Gold | Dijllah Gold Refinery FZC | UNITED ARAB EMIRATES |
| Gold | Dongwu Gold Group | CHINA |
| Gold | Dowa | JAPAN |
| Gold | DSC (Do Sung Corporation) | KOREA, REPUBLIC OF |
| Gold | Eco-System Recycling Co., Ltd. East Plant | JAPAN |
| Gold | Eco-System Recycling Co., Ltd. North Plant | JAPAN |
| Gold | Eco-System Recycling Co., Ltd. West Plant | JAPAN |
| Gold | Elite Industech Co., Ltd. | TAIWAN, PROVINCE OF CHINA |
| Gold | Emerald Jewel Industry India Limited (Unit 1) | INDIA |
| Gold | Emerald Jewel Industry India Limited (Unit 2) | INDIA |
| Gold | Emerald Jewel Industry India Limited (Unit 3) | INDIA |
| Gold | Emerald Jewel Industry India Limited (Unit 4) | INDIA |
| Gold | Emirates Gold DMCC | UNITED ARAB EMIRATES |
| Gold | Fidelity Printers and Refiners Ltd. | ZIMBABWE |
| Gold | Fujairah Gold FZC | UNITED ARAB EMIRATES |
| Gold | Gasabo Gold Refinery Ltd | RWANDA |
| Gold | GG Refinery Ltd. | TANZANIA, UNITED REPUBLIC OF |
| Gold | GGC Gujrat Gold Centre Pvt. Ltd. | INDIA |
| Gold | Gold by Gold Colombia | COLOMBIA |
| Gold | Gold Coast Refinery | GHANA |
| Gold | Gold Refinery of Zijin Mining Group Co., Ltd. | CHINA |
| Gold | Great Wall Precious Metals Co., Ltd. of CBPM | CHINA |
| Gold | Guangdong Jinding Gold Limited | CHINA |
| Gold | Guoda Safina High-Tech Environmental Refinery Co., Ltd. | CHINA |
| Gold | Hangzhou Fuchunjiang Smelting Co., Ltd. | CHINA |
| Gold | Heimerle + Meule GmbH | GERMANY |
| Gold | Henan Yuguang Gold & Lead Co., Ltd. | CHINA |
| Gold | Heraeus Germany GmbH Co. KG | GERMANY |
| Gold | Heraeus Metals Hong Kong Ltd. | CHINA |
| Gold | Hunan Chenzhou Mining Co., Ltd. | CHINA |
| Gold | Hunan Guiyang yinxing Nonferrous Smelting Co., Ltd. | CHINA |
| Gold | HwaSeong CJ CO., LTD. | KOREA, REPUBLIC OF |
| Gold | Impala Platinum - Platinum Metals Refinery (PMR) | SOUTH AFRICA |
| Gold | Impala Platinum - Rustenburg Smelter | SOUTH AFRICA |
| Gold | Industrial Refining Company | BELGIUM |
| Gold | Inner Mongolia Qiankun Gold and Silver Refinery Share Co., Ltd. | CHINA |
| Gold | International Precious Metal Refiners | UNITED ARAB EMIRATES |
| Gold | Ishifuku Metal Industry Co., Ltd. | JAPAN |
| Gold | Istanbul Gold Refinery | TURKEY |
| Gold | Italpreziosi | ITALY |
| Gold | JALAN & Company | INDIA |
| Gold | Japan Mint | JAPAN |
| Gold | Jiangxi Copper Co., Ltd. | CHINA |
| Gold | JSC Ekaterinburg Non-Ferrous Metal Processing Plant | RUSSIAN FEDERATION |
| Gold | JSC Novosibirsk Refinery | RUSSIAN FEDERATION |
| Gold | JSC Uralelectromed | RUSSIAN FEDERATION |
| Gold | JX Nippon Mining & Metals Co., Ltd. | JAPAN |
| Gold | K.A. Rasmussen | NORWAY |
| Gold | Kaloti Precious Metals | UNITED ARAB EMIRATES |
| Gold | Kazakhmys Smelting LLC | KAZAKHSTAN |
| Gold | Kazzinc | KAZAKHSTAN |
| Gold | Kennecott Utah Copper LLC | UNITED STATES OF AMERICA |
| Gold | KGHM Polska Miedz Spolka Akcyjna | POLAND |
| Gold | Kojima Chemicals Co., Ltd. | JAPAN |
| Gold | Korea Zinc Co., Ltd. | KOREA, REPUBLIC OF |
| Gold | Kundan Care Products Ltd. | INDIA |
| Gold | Kyrgyzaltyn JSC | KYRGYZSTAN |
| Gold | Kyshtym Copper-Electrolytic Plant ZAO | RUSSIAN FEDERATION |
| Gold | L'azurde Company For Jewelry | SAUDI ARABIA |
| Gold | Lingbao Gold Co., Ltd. | CHINA |
| Gold | Lingbao Jinyuan Tonghui Refinery Co., Ltd. | CHINA |
| Gold | L'Orfebre S.A. | ANDORRA |
| Gold | LS MnM Inc. | KOREA, REPUBLIC OF |
| Gold | LT Metal Ltd. | KOREA, REPUBLIC OF |
| Gold | Luoyang Zijin Yinhui Gold Refinery Co., Ltd. | CHINA |
| Gold | Marsam Metals | BRAZIL |
| Gold | Materion | UNITED STATES OF AMERICA |
| Gold | Matsuda Sangyo Co., Ltd. | JAPAN |
| Gold | MD Overseas | INDIA |
| Gold | Metal Concentrators SA (Pty) Ltd. | SOUTH AFRICA |
| Gold | Metallix Refining Inc. | UNITED STATES OF AMERICA |
| Gold | Metalor Switzerland | SWITZERLAND |
| Gold | Metalor Technologies (Hong Kong) Ltd. | CHINA |
| Gold | Metalor Technologies (Singapore) Pte., Ltd. | SINGAPORE |
| Gold | Metalor Technologies (Suzhou) Ltd. | CHINA |
| Gold | Metalor Technologies S.A. | SWITZERLAND |
| Gold | Metalor USA Refining Corporation | UNITED STATES OF AMERICA |
| Gold | Metalurgica Met-Mex Penoles S.A. De C.V. | MEXICO |
| Gold | Minera Titan del Peru SRL (MTP) - Belen Plant | PERU |
| Gold | Mitsubishi Materials Corporation | JAPAN |
| Gold | Mitsui Mining and Smelting Co., Ltd. | JAPAN |
| Gold | MKS PAMP SA | SWITZERLAND |
| Gold | MMTC-PAMP India Pvt., Ltd. | INDIA |
| Gold | Modeltech Sdn Bhd | MALAYSIA |
| Gold | Morris and Watson | NEW ZEALAND |
| Gold | Moscow Special Alloys Processing Plant | RUSSIAN FEDERATION |
| Gold | Nadir Metal Rafineri San. Ve Tic. A.S. | TURKEY |
| Gold | Navoi Mining and Metallurgical Combinat | UZBEKISTAN |
| Gold | NH Recytech Company | KOREA, REPUBLIC OF |
| Gold | Nihon Material Co., Ltd. | JAPAN |
| Gold | NOBLE METAL SERVICES | UNITED STATES OF AMERICA |
| Gold | Ogussa Osterreichische Gold- und Silber-Scheideanstalt GmbH | AUSTRIA |
| Gold | Ohura Precious Metal Industry Co., Ltd. | JAPAN |
| Gold | OJSC "The Gulidov Krasnoyarsk Non-Ferrous Metals Plant" (OJSC Krastsvetmet) | RUSSIAN FEDERATION |
| Gold | Pease & Curren | UNITED STATES OF AMERICA |
| Gold | Penglai Penggang Gold Industry Co., Ltd. | CHINA |
| Gold | Planta Recuperadora de Metales SpA | CHILE |
| Gold | Prioksky Plant of Non-Ferrous Metals | RUSSIAN FEDERATION |
| Gold | PT Aneka Tambang (Persero) Tbk | INDONESIA |
| Gold | PX Precinox S.A. | SWITZERLAND |
| Gold | QG Refining, LLC | UNITED STATES OF AMERICA |
| Gold | Rand Refinery (Pty) Ltd. | SOUTH AFRICA |
| Gold | Refinery of Seemine Gold Co., Ltd. | CHINA |
| Gold | REMONDIS PMR B.V. | NETHERLANDS |
| Gold | Royal Canadian Mint | CANADA |
| Gold | SAAMP | FRANCE |
| Gold | Sabin Metal Corp. | UNITED STATES OF AMERICA |
| Gold | Safimet S.p.A | ITALY |
| Gold | SAFINA A.S. | CZECHIA |
| Gold | Sai Refinery | INDIA |
| Gold | Sam Precious Metals | UNITED ARAB EMIRATES |
| Gold | SAM Precious Metals FZ-LLC | UNITED ARAB EMIRATES |
| Gold | Samduck Precious Metals | KOREA, REPUBLIC OF |
| Gold | Samwon Metals Corp. | KOREA, REPUBLIC OF |
| Gold | SEMPSA Joyeria Plateria S.A. | SPAIN |
| Gold | Shan Dong Huangjin | CHINA |
| Gold | Shandong Gold Smelting Co., Ltd. | CHINA |
| Gold | Shandong Humon Smelting Co., Ltd. | CHINA |
| Gold | Shandong Tiancheng Biological Gold Industrial Co., Ltd. | CHINA |
| Gold | Shandong Zhaojin Gold & Silver Refinery Co., Ltd. | CHINA |
| Gold | Shenzhen CuiLu Gold Co., Ltd. | CHINA |
| Gold | SHENZHEN JINJUNWEI RESOURCE COMPREHENSIVE DEVELOPMENT CO., LTD. | CHINA |
| Gold | Shenzhen Zhonghenglong Real Industry Co., Ltd. | CHINA |
| Gold | Shirpur Gold Refinery Ltd. | INDIA |
| Gold | Sichuan Tianze Precious Metals Co., Ltd. | CHINA |
| Gold | Singway Technology Co., Ltd. | TAIWAN, PROVINCE OF CHINA |
| Gold | SOE Shyolkovsky Factory of Secondary Precious Metals | RUSSIAN FEDERATION |
| Gold | Solar Applied Materials Technology Corp. | TAIWAN, PROVINCE OF CHINA |
| Gold | Sovereign Metals | INDIA |
| Gold | State Research Institute Center for Physical Sciences and Technology | LITHUANIA |
| Gold | Sudan Gold Refinery | SUDAN |
| Gold | Sumitomo Metal Mining Co., Ltd. | JAPAN |
| Gold | SungEel HiMetal Co., Ltd. | KOREA, REPUBLIC OF |
| Gold | Super Dragon Technology Co., Ltd. | TAIWAN, PROVINCE OF CHINA |
| Gold | T.C.A S.p.A | ITALY |
| Gold | Tanaka Kikinzoku Kogyo K.K. | JAPAN |
| Gold | TITAN COMPANY LIMITED, JEWELLERY DIVISION | INDIA |
| Gold | Tokuriki Honten Co., Ltd. | JAPAN |
| Gold | Tongling Nonferrous Metals Group Co., Ltd. | CHINA |
| Gold | TOO Tau-Ken-Altyn | KAZAKHSTAN |
| Gold | Torecom | KOREA, REPUBLIC OF |
| Gold | Umicore Precious Metals Thailand | THAILAND |
| Gold | Umicore S.A. Business Unit Precious Metals Refining | BELGIUM |
| Gold | United Precious Metal Refining, Inc. | UNITED STATES OF AMERICA |
| Gold | Valcambi S.A. | SWITZERLAND |
| Gold | WEEEREFINING | FRANCE |
| Gold | Western Australian Mint (T/a The Perth Mint) | AUSTRALIA |
| Gold | WIELAND Edelmetalle GmbH | GERMANY |
| Gold | Yamakin Co., Ltd. | JAPAN |
| Gold | Yokohama Metal Co., Ltd. | JAPAN |
| Gold | Yunnan Copper Industry Co., Ltd. | CHINA |
| Gold | Zhongyuan Gold Smelter of Zhongjin Gold Corporation | CHINA |
| Tantalum | 5D Production OU | ESTONIA |
| Tantalum | AMG Brasil | BRAZIL |
| Tantalum | Changsha South Tantalum Niobium Co., Ltd. | CHINA |
| Tantalum | D Block Metals, LLC | UNITED STATES OF AMERICA |
| Tantalum | Exotech Inc. | UNITED STATES OF AMERICA |
| Tantalum | F&X Electro-Materials Ltd. | CHINA |
| Tantalum | FIR Metals & Resource Ltd. | CHINA |
| Tantalum | Global Advanced Metals Aizu | JAPAN |
| Tantalum | Global Advanced Metals Boyertown | UNITED STATES OF AMERICA |
| Tantalum | Guangdong Rising Rare Metals-EO Materials Ltd. | CHINA |
| Tantalum | H.C. Starck Hermsdorf GmbH | GERMANY |
| Tantalum | Hengyang King Xing Lifeng New Materials Co., Ltd. | CHINA |
| Tantalum | Jiangxi Dinghai Tantalum & Niobium Co., Ltd. | CHINA |
| Tantalum | Jiangxi Sanshi Nonferrous Metals Co., Ltd | CHINA |
| Tantalum | Jiangxi Suns Nonferrous Materials Co. Ltd. | CHINA |
| Tantalum | Jiangxi Tuohong New Raw Material | CHINA |
| Tantalum | Jiujiang Janny New Material Co., Ltd. | CHINA |
| Tantalum | JiuJiang JinXin Nonferrous Metals Co., Ltd. | CHINA |
| Tantalum | Jiujiang Tanbre Co., Ltd. | CHINA |
| Tantalum | Jiujiang Zhongao Tantalum & Niobium Co., Ltd. | CHINA |
| Tantalum | KEMET de Mexico | MEXICO |
| Tantalum | Materion Newton Inc. | UNITED STATES OF AMERICA |
| Tantalum | Metallurgical Products India Pvt., Ltd. | INDIA |
| Tantalum | Mineracao Taboca S.A. | BRAZIL |
| Tantalum | Mitsui Mining and Smelting Co., Ltd. | JAPAN |
| Tantalum | Ningxia Orient Tantalum Industry Co., Ltd. | CHINA |
| Tantalum | NPM Silmet AS | ESTONIA |
| Tantalum | PowerX Ltd. | RWANDA |
| Tantalum | QuantumClean | UNITED STATES OF AMERICA |
| Tantalum | Resind Industria e Comercio Ltda. | BRAZIL |
| Tantalum | RFH Yancheng Jinye New Material Technology Co., Ltd. | CHINA |
| Tantalum | Solikamsk Magnesium Works OAO | RUSSIAN FEDERATION |
| Tantalum | Taki Chemical Co., Ltd. | JAPAN |
| Tantalum | TANIOBIS Co., Ltd. | THAILAND |
| Tantalum | TANIOBIS GmbH | GERMANY |
| Tantalum | TANIOBIS Japan Co., Ltd. | JAPAN |
| Tantalum | TANIOBIS Smelting GmbH & Co. KG | GERMANY |
| Tantalum | Telex Metals | UNITED STATES OF AMERICA |
| Tantalum | Ulba Metallurgical Plant JSC | KAZAKHSTAN |
| Tantalum | ULVAC Inc. | JAPAN |
| Tantalum | XIMEI RESOURCES (GUANGDONG) LIMITED | CHINA |
| Tantalum | XinXing HaoRong Electronic Material Co., Ltd. | CHINA |
| Tantalum | Yanling Jincheng Tantalum & Niobium Co., Ltd. | CHINA |
| Tin | Alent plc | INDONESIA |
| Tin | Alpha | UNITED STATES OF AMERICA |
| Tin | Alpha Assembly Solutions Inc | UNITED STATES OF AMERICA |
| Tin | Alpha Metals (Taiwan) Inc. | UNITED STATES OF AMERICA |
| Tin | An Vinh Joint Stock Mineral Processing Company | VIETNAM |
| Tin | Aurubis Beerse | BELGIUM |
| Tin | Aurubis Berango | SPAIN |
| Tin | Chenzhou Yunxiang Mining and Metallurgy Co., Ltd. | CHINA |
| Tin | Chifeng Dajingzi Tin Industry Co., Ltd. | CHINA |
| Tin | China Tin (Hechi) | CHINA |
| Tin | China Tin Group Co., Ltd. | CHINA |
| Tin | China Yunnan Tin Co Ltd. | CHINA |
| Tin | Cookson | UNITED STATES OF AMERICA |
| Tin | CRM Fundicao De Metais E Comercio De Equipamentos Eletronicos Do Brasil Ltda | BRAZIL |
| Tin | CRM Synergies | SPAIN |
| Tin | CV Ayi Jaya | INDONESIA |
| Tin | Dongguan Best Alloys Co., Ltd. | CHINA |
| Tin | Dongguan CiEXPO Environmental Engineering Co., Ltd. | CHINA |
| Tin | Dowa | JAPAN |
| Tin | DS Myanmar | MYANMAR |
| Tin | Electro-Mechanical Facility of the Cao Bang Minerals & Metallurgy Joint Stock Company | VIETNAM |
| Tin | EM Vinto | BOLIVIA (PLURINATIONAL STATE OF) |
| Tin | Empresa Metalúrgica Vinto | BOLIVIA (PLURINATIONAL STATE OF) |
| Tin | ENAF | BOLIVIA (PLURINATIONAL STATE OF) |
| Tin | Estanho de Rondonia S.A. | BRAZIL |
| Tin | Fabrica Auricchio Industria e Comercio Ltda. | BRAZIL |
| Tin | Feinhutte Halsbrucke GmbH | GERMANY |
| Tin | Fenix Metals | POLAND |
| Tin | Funsur Smelter | PERU |
| Tin | Gejiu City Fuxiang Industry and Trade Co., Ltd. | CHINA |
| Tin | Gejiu Kai Meng Industry and Trade LLC | CHINA |
| Tin | Gejiu Non-Ferrous Metal Processing Co., Ltd. | CHINA |
| Tin | Gejiu Yunxin Nonferrous Electrolysis Co., Ltd. | CHINA |
| Tin | Gejiu Zili Mining And Metallurgy Co., Ltd. | CHINA |
| Tin | Global Advanced Metals Greenbushes Pty Ltd. | AUSTRALIA |
| Tin | Guangdong Hanhe Non-Ferrous Metal Co., Ltd. | CHINA |
| Tin | HuiChang Hill Tin Industry Co., Ltd. | CHINA |
| Tin | INDONESIAN STATE TIN CORPORATION MENTOK SMELTER | INDONESIA |
| Tin | Jean Goldschmidt International (JGI Hydrometal) | BELGIUM |
| Tin | Jiangxi New Nanshan Technology Ltd. | CHINA |
| Tin | Kundur Smelter | INDONESIA |
| Tin | Liuzhhou China Tin | CHINA |
| Tin | Longnan Chuangyue Environmental Protection Technology Development Co., Ltd | CHINA |
| Tin | Luna Smelter, Ltd. | RWANDA |
| Tin | Ma'anshan Weitai Tin Co., Ltd. | CHINA |
| Tin | Magnu's Minerais Metais e Ligas Ltda. | BRAZIL |
| Tin | Malaysia Smelting Corporation (MSC) | MALAYSIA |
| Tin | Malaysia Smelting Corporation Berhad (Port Klang) | MALAYSIA |
| Tin | Melt Metais e Ligas S.A. | BRAZIL |
| Tin | Metallic Resources, Inc. | UNITED STATES OF AMERICA |
| Tin | Metallo Belgium N.V. | BELGIUM |
| Tin | Metallo Spain S.L.U. | SPAIN |
| Tin | Mineracao Taboca S.A. | BRAZIL |
| Tin | Mining Minerals Resources SARL | CONGO, DEMOCRATIC REPUBLIC OF THE |
| Tin | Minsur | PERU |
| Tin | Mitsubishi Materials Corporation | JAPAN |
| Tin | Modeltech Sdn Bhd | MALAYSIA |
| Tin | Nghe Tinh Non-Ferrous Metals Joint Stock Company | VIETNAM |
| Tin | Novosibirsk Tin Combine | RUSSIAN FEDERATION |
| Tin | O.M. Manufacturing (Thailand) Co., Ltd. | THAILAND |
| Tin | O.M. Manufacturing Philippines, Inc. | PHILIPPINES |
| Tin | OMSA | BOLIVIA (PLURINATIONAL STATE OF) |
| Tin | Operaciones Metalurgicas S.A. | BOLIVIA (PLURINATIONAL STATE OF) |
| Tin | P Kay Metal, Inc | UNITED STATES OF AMERICA |
| Tin | Pongpipat Company Limited | MYANMAR |
| Tin | Precious Minerals and Smelting Limited | INDIA |
| Tin | PT Arsed Indonesia | INDONESIA |
| Tin | PT Artha Cipta Langgeng | INDONESIA |
| Tin | PT ATD Makmur Mandiri Jaya | INDONESIA |
| Tin | PT Babel Surya Alam Lestari | INDONESIA |
| Tin | PT Bangka Prima Tin | INDONESIA |
| Tin | PT Bangka Serumpun | INDONESIA |
| Tin | PT Bangka Tin Industry | INDONESIA |
| Tin | PT Belitung Industri Sejahtera | INDONESIA |
| Tin | PT Cipta Persada Mulia | INDONESIA |
| Tin | PT Mitra Stania Prima | INDONESIA |
| Tin | PT Mitra Sukses Globalindo | INDONESIA |
| Tin | PT Panca Mega Persada | INDONESIA |
| Tin | PT Premium Tin Indonesia | INDONESIA |
| Tin | PT Prima Timah Utama | INDONESIA |
| Tin | PT Putera Sarana Shakti (PT PSS) | INDONESIA |
| Tin | PT Rajehan Ariq | INDONESIA |
| Tin | PT Refined Bangka Tin | INDONESIA |
| Tin | PT Tambang Timah | INDONESIA |
| Tin | PT Timah Nusantara | INDONESIA |
| Tin | PT Timah Tbk Kundur | INDONESIA |
| Tin | PT Timah Tbk Mentok | INDONESIA |
| Tin | PT Tirus Putra Mandiri | INDONESIA |
| Tin | PT Tommy Utama | INDONESIA |
| Tin | Resind Industria e Comercio Ltda. | BRAZIL |
| Tin | RIKAYAA GREENTECH PRIVATE LIMITED | INDIA |
| Tin | Rui Da Hung | TAIWAN, PROVINCE OF CHINA |
| Tin | Soft Metais Ltda. | BRAZIL |
| Tin | Super Ligas | BRAZIL |
| Tin | Takehara PVD Materials Plant / PVD Materials Division of MITSUI MINING & SMELTING CO., LTD. | JAPAN |
| Tin | Thai Solder Industry Corp., Ltd. | THAILAND |
| Tin | Thailand Smelting & Refining Co Ltd | THAILAND |
| Tin | Thaisarco | THAILAND |
| Tin | Tin Smelting Branch of Yunnan Tin Co., Ltd. | CHINA |
| Tin | Tin Technology & Refining | UNITED STATES OF AMERICA |
| Tin | TRATHO Metal Quimica | Brazil |
| Tin | Tuyen Quang Non-Ferrous Metals Joint Stock Company | VIETNAM |
| Tin | VQB Mineral and Trading Group JSC | VIETNAM |
| Tin | White Solder Metalurgia e Mineracao Ltda. | BRAZIL |
| Tin | White Solder Metalurgica | BRAZIL |
| Tin | Woodcross Smelting Company Limited | UGANDA |
| Tin | Yunnan Chengfeng Non-ferrous Metals Co., Ltd. | CHINA |
| Tin | Yunnan Tin Company, Ltd. | CHINA |
| Tin | Yunnan Yunfan Non-ferrous Metals Co., Ltd. | CHINA |
| Tungsten | A.L.M.T. Corp. | JAPAN |
| Tungsten | ACL Metais Eireli | BRAZIL |
| Tungsten | Albasteel Industria e Comercio de Ligas Para Fundicao Ltd. | BRAZIL |
| Tungsten | Artek LLC | RUSSIAN FEDERATION |
| Tungsten | Asia Tungsten Products Vietnam Ltd. | VIETNAM |
| Tungsten | China Molybdenum Tungsten Co., Ltd. | CHINA |
| Tungsten | Chongyi Zhangyuan Tungsten Co., Ltd. | CHINA |
| Tungsten | CNMC (Guangxi) PGMA Co., Ltd. | CHINA |
| Tungsten | Cronimet Brasil Ltda | BRAZIL |
| Tungsten | DONGKUK INDUSTRIES CO., LTD. | KOREA, REPUBLIC OF |
| Tungsten | Fujian Xinlu Tungsten Co., Ltd. | CHINA |
| Tungsten | Ganzhou Jiangwu Ferrotungsten Co., Ltd. | CHINA |
| Tungsten | Ganzhou Seadragon W & Mo Co., Ltd. | CHINA |
| Tungsten | Global Tungsten & Powders LLC | UNITED STATES OF AMERICA |
| Tungsten | Guangdong Xianglu Tungsten Co., Ltd. | CHINA |
| Tungsten | H.C. Starck Tungsten GmbH | GERMANY |
| Tungsten | HANNAE FOR T Co., Ltd. | KOREA, REPUBLIC OF |
| Tungsten | Hubei Green Tungsten Co., Ltd. | CHINA |
| Tungsten | Hunan Chenzhou Mining Co., Ltd. | CHINA |
| Tungsten | Hunan Jintai New Material Co., Ltd. | CHINA |
| Tungsten | Hunan Shizhuyuan Nonferrous Metals Co., Ltd. Chenzhou Tungsten Products Branch | CHINA |
| Tungsten | Hydrometallurg, JSC | RUSSIAN FEDERATION |
| Tungsten | Japan New Metals Co., Ltd. | JAPAN |
| Tungsten | Jiangwu H.C. Starck Tungsten Products Co., Ltd. | CHINA |
| Tungsten | Jiangxi Gan Bei Tungsten Co., Ltd. | CHINA |
| Tungsten | Jiangxi Minmetals Gao'an Non-ferrous Metals Co., Ltd. | CHINA |
| Tungsten | Jiangxi Tonggu Non-ferrous Metallurgical & Chemical Co., Ltd. | CHINA |
| Tungsten | Jiangxi Xinsheng Tungsten Industry Co., Ltd. | CHINA |
| Tungsten | Jiangxi Yaosheng Tungsten Co., Ltd. | CHINA |
| Tungsten | Jing Yuan Tungsten Technology Co., Ltd. | TAIWAN, PROVINCE OF CHINA |
| Tungsten | JSC "Kirovgrad Hard Alloys Plant" | RUSSIAN FEDERATION |
| Tungsten | Kenee Mining Corporation Vietnam | VIETNAM |
| Tungsten | Kennametal Fallon | UNITED STATES OF AMERICA |
| Tungsten | Kennametal Huntsville | UNITED STATES OF AMERICA |
| Tungsten | LAOS SOUTHERN MINING SMELTING SOLE CO.,LTD | LAO PEOPLE'S DEMOCRATIC REPUBLIC |
| Tungsten | Lianyou Metals Co., Ltd. | TAIWAN, PROVINCE OF CHINA |
| Tungsten | Lianyou Resources Co., Ltd. | TAIWAN, PROVINCE OF CHINA |
| Tungsten | LLC Vostok | RUSSIAN FEDERATION |
| Tungsten | MALAMET SMELTING SDN. BHD. | MALAYSIA |
| Tungsten | Malipo Haiyu Tungsten Co., Ltd. | CHINA |
| Tungsten | Masan High-Tech Materials | VIETNAM |
| Tungsten | Moliren Ltd. | RUSSIAN FEDERATION |
| Tungsten | Nam Viet Cromit Joint Stock Company | VIETNAM |
| Tungsten | Niagara Refining LLC | UNITED STATES OF AMERICA |
| Tungsten | NPP Tyazhmetprom LLC | RUSSIAN FEDERATION |
| Tungsten | OOO "Technolom" 1 | RUSSIAN FEDERATION |
| Tungsten | OOO "Technolom" 2 | RUSSIAN FEDERATION |
| Tungsten | Philippine Bonway Manufacturing Industrial Corporation | PHILIPPINES |
| Tungsten | Philippine Carreytech Metal Corp. | PHILIPPINES |
| Tungsten | Philippine Chuangxin Industrial Co., Inc. | PHILIPPINES |
| Tungsten | S.P.T. spol.s r.o. | CZECHIA |
| Tungsten | Sanher Tungsten Vietnam Co., Ltd. | VIETNAM |
| Tungsten | Shinwon Tungsten (Fujian Shanghang) Co., Ltd. | CHINA |
| Tungsten | TANIOBIS Smelting GmbH & Co. KG | GERMANY |
| Tungsten | Tungamoy Metals Inc. | KOREA, REPUBLIC OF |
| Tungsten | Tungsten Vietnam Joint Stock Company | VIETNAM |
| Tungsten | Unecha Refractory metals plant | RUSSIAN FEDERATION |
| Tungsten | Wolfram Bergbau und Hutten AG | AUSTRIA |
| Tungsten | Xiamen H.C. | CHINA |
| Tungsten | Xiamen Tungsten (H.C.) Co., Ltd. | CHINA |
| Tungsten | Xiamen Tungsten Co., Ltd. | CHINA |
| Tungsten | YUDU ANSHENG TUNGSTEN CO., LTD. | CHINA |

---