# EDGAR Filing Document

**Accession Number:** 0000006176
**File Stem:** 0001193125-26-246310
**Filing Date:** 2026-5
**Character Count:** 60264
**Document Hash:** 15ca7803e97fbadd9da6cb84582ffde5
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-246310.hdr.sgml**: 20260529

**ACCESSION NUMBER**: 0001193125-26-246310

**CONFORMED SUBMISSION TYPE**: SD

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260529

**DATE AS OF CHANGE**: 20260529

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** AMPCO PITTSBURGH CORP
- **CENTRAL INDEX KEY:** 0000006176
- **STANDARD INDUSTRIAL CLASSIFICATION:** PUMPS & PUMPING EQUIPMENT [3561]
- **ORGANIZATION NAME:** 06 Technology
- **EIN:** 251117717
- **STATE OF INCORPORATION:** PA
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SD
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-00898
- **FILM NUMBER:** 261038992

**BUSINESS ADDRESS:**
- **STREET 1:** 726 BELL AVENUE
- **STREET 2:** SUITE 301
- **CITY:** CARNEGIE
- **STATE:** PA
- **ZIP:** 15106
- **BUSINESS PHONE:** 412-456-4400

**MAIL ADDRESS:**
- **STREET 1:** 726 BELL AVENUE
- **STREET 2:** SUITE 301
- **CITY:** CARNEGIE
- **STATE:** PA
- **ZIP:** 15106

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** SCREW & BOLT CORP OF AMERICA
- **DATE OF NAME CHANGE:** 19710518

**UNITED STATES** 

**SECURITIES AND EXCHANGE COMMISSION** 

**Washington, D.C. 20549** 

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**FORM SD** 

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**Specialized Disclosure Report** 

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**Ampco-Pittsburgh Corporation** 

**(Exact name of registrant as specified in its charter)** 

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| | | |
|:---|:---|:---|
| **Pennsylvania** | **001-00898** | **25-1117717** |
| **(State or other jurisdiction**<br>**of incorporation)** | **(Commission**<br>**File Number)** | **(IRS Employer**<br>**Identification No.)** |
| **726 Bell Avenue, Suite 301, Carnegie, Pennsylvania** | **726 Bell Avenue, Suite 301, Carnegie, Pennsylvania** | **15106** |
| **(Address of principal executive office)** | **(Address of principal executive office)** | **(Zip Code)** |

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**(412) 456-4400** 

**Registrant's telephone number, including area code** 

**Kimberly P. Knox**

**Corporate Secretary, Ampco-Pittsburgh Corporation**

**(412) 429-2454**

**(Name and telephone number, including area code, of the 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:

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

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**Section 1 - Conflict Minerals Disclosure**

**<u>Item 1.01</u> <u>Conflict Minerals Disclosure and Report</u>**

**Conflict Minerals Disclosure**

**Introduction** 

This Specialized Disclosure Report on Form SD (this "<u>Report</u>") is filed pursuant to Rule 13p-1 (the "<u>Rule</u>") promulgated under the Securities Exchange Act of 1934, as amended (the "<u>Exchange Act</u>"), for the reporting period from January 1, 2025 to December 31, 2025. The Rule requires disclosure of certain information when a company manufactures or contracts to manufacture products for which gold, columbite-tantalite (coltan), cassiterite, wolframite, or their derivatives, which are currently limited to tantalum, tin and tungsten (collectively, the "<u>Conflict Minerals</u>") are contained in, and necessary to the functionality or production of, such products. The Rule requires that SEC registrants conduct in good faith a reasonable country of origin inquiry ("<u>RCOI</u>") designed to determine whether any such Conflict Minerals originated in the Democratic Republic of Congo or any "adjoining country" (as defined by the SEC) (collectively, the "<u>Covered Countries</u>") or are from recycled or scrap sources.

Ampco-Pittsburgh Corporation (including its consolidated subsidiaries as the context may require, the "<u>Corporation</u>") has determined that tin and tungsten (together, the "<u>Identified Minerals</u>") were contained in, and necessary to the functionality or production of, one or more products manufactured by the Corporation or contracted by the Corporation to be manufactured (the "<u>Covered Products</u>") during the period covered by this Report. As such, the Corporation has conducted in good faith an RCOI designed to determine whether any of the Identified Minerals in the Covered Products (1) originated in a Covered Country or (2) are from recycled or scrap sources.

As discussed more fully below, based on the Corporation's RCOI, the Corporation has concluded that (a) it does not have any reason to believe that any of the Identified Minerals used in connection with the Covered Products may have originated in a Covered Country or (b) it has reason to believe that the Identified Minerals used in connection with the Covered Products may be from recycled or scrap sources.

**The Corporation and its Business Segments** 

The Corporation was incorporated in Pennsylvania in 1929 and manufactures and sells highly engineered, high performance specialty metal products and customized equipment utilized by industry throughout the world. The Corporation classifies its business in two segments: Forged and Cast Engineered Products and Air and Liquid Processing.

*Forged and Cast Engineered Products Segment* 

The Forged and Cast Engineered Products segment, consisting of Union Electric Steel Corporation and its direct and indirect subsidiaries (collectively, "<u>UES</u>"), has operations in the United States, Sweden, and Slovenia and has an equity interest in three joint-venture companies in China. The companies comprising this segment produce forged and cast products that service a wide variety of industries globally. The Forged and Cast Engineered Products segment specializes in the production of forged hardened steel rolls used mainly for cold rolling by producers of steel, aluminum, and other metals and cast rolls for hot and cold strip mills, medium/heavy section mills and plate mills in a variety of iron and steel qualities. In addition, this segment produces open-die forged products which are used in the gas and oil industry and the aluminum and plastic extrusion industries.

*Air and Liquid Processing Segment* 

The Air and Liquid Processing segment consists of Aerofin, Buffalo Air Handling, and Buffalo Pumps, all divisions of Air & Liquid Systems Corporation, a wholly-owned subsidiary of the Corporation. This segment has operations in Virginia and New York, with headquarters in Carnegie, Pennsylvania, and distributes a significant portion of its products through a common independent group of sales offices located throughout the United States and Canada.

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Aerofin produces custom-engineered finned tube heat exchange coils and related heat transfer products for a variety of industries including original equipment manufacturer/commercial, fossil fuel power generation, nuclear power generation and industrial manufacturing.

Buffalo Air Handling produces large custom-designed air handling systems for institutional markets (e.g., hospitals and universities), pharmaceutical markets and general industrial building markets.

Buffalo Pumps manufactures centrifugal pumps for the fossil fuel power generation, marine defense, and industrial refrigeration industries.

**Reasonable Country of Origin Inquiry** 

In accordance with the Exchange Act and the rules and regulations thereunder, including the Rule, the Corporation performed an assessment of its product line to examine which of the products manufactured by it or contracted to be manufactured by it contained one or more Conflict Minerals that were necessary for the functionality or production of such identified products. The Corporation concluded that the Covered Products contained one or more of the Identified Minerals of tin and tungsten. Consequently, the Corporation conducted in good faith an RCOI with respect to the Identified Minerals in such Covered Products. The purpose of the RCOI was to determine whether any of such Identified Minerals (1) originated in a Covered Country or (2) are from recycled or scrap sources.

After identifying the Covered Products, in furtherance of its RCOI efforts, the Corporation identified which suppliers may have provided materials included in the Covered Products that potentially contained any of the Identified Minerals (the "<u>Covered Suppliers</u>") and conducted a supply-chain survey by contacting each Covered Supplier and providing them with the most recent due diligence template developed by the Electronic Industry Citizenship Coalition (the "<u>EICC</u>") and the Global e-Sustainability Initiative (the "<u>GeSI</u>"), commonly referred to as the Conflict Mineral Report Template (the "<u>CMRT</u>"). The Corporation also informed the Covered Suppliers of the Corporation's obligations with respect to conducting an RCOI and filing this Report pursuant to the Exchange Act.

The Corporation uses a network of materials suppliers from numerous countries across multiple continents. The materials sourced from Covered Suppliers are not purchased directly from the smelters where such materials originated. As such, the Corporation relies on information provided by the Covered Suppliers through the supply-chain survey. In many cases, the Covered Suppliers are several tiers separated from the smelter at which the original minerals were smelted. The Covered Suppliers (many of whom are not subject to the reporting requirements of the Exchange Act) rely on their own respective sub-suppliers to provide them with information regarding the materials sourced by such sub-suppliers, or the Covered Suppliers may purchase the materials on the secondary market from recycled or scrap sources.

The Corporation compiled and analyzed all of the CMRTs and related information received from Covered Suppliers and compared the smelters and refiners identified in the CMRT supply-chain survey against the list of smelter facilities which have been identified as "conflict free" by programs such as the Conflict-Free Smelter Program of the EICC/GeSI Conflict-Free Sourcing Initiative (the "<u>CFSI</u>").

**Results of the Corporation's Good Faith RCOI and Due Diligence Process** 

The Corporation performed a reasonable country of origin inquiry, in which it surveyed direct suppliers regarding whether its necessary Conflict Minerals, have been sourced from a Covered Country. As discussed in greater detail below, most of the responses the Corporation received indicated that the 3TG in the suppliers' components and materials either (a) were not sourced from smelters located in a Covered Country or (b) were not necessary to the functionality of the components and materials. During its reasonable country of origin inquiry, the Corporation determined that some of its necessary Conflict Minerals may have been sourced from the Democratic Republic of the Congo or an adjoining country. As such, the Corporation proceeded to exercise due diligence in accordance with the Organization for Economic Cooperation and Development Due Diligence Guidance for Responsible Supply Chains of Minerals from Conflict-Affected and High-Risk Areas framework on the source and chain of custody of the Conflict Minerals.

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*Suppliers & Smelters* 

As a result of the RCOI and the Corporation's due diligence process in connection with its use of the Identified Minerals in the Covered Products, the Corporation identified a total of 22 Covered Suppliers:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•two suppliers of tungsten to UES;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•one supplier of tungsten, one supplier of gold, one supplier of tantalum and two suppliers of tin to Aerofin;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•three suppliers of tungsten and two suppliers of tin to Buffalo Air Handling; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•three suppliers of tungsten, one supplier of gold, two suppliers of tantalum and four suppliers of tin to Buffalo Pumps.

The list of smelters responsible for certain Conflict Minerals sourced by the Covered Suppliers are set forth on Appendix A. Despite the Corporation's best efforts to follow up with certain Covered Suppliers, the Corporation did not receive complete and thorough responses from all Covered Suppliers. There are numerous reasons for the Corporation's inability to receive complete responsiveness from all Covered Suppliers and to identify the full supply chain or originating smelter including:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•the Corporation is wholly dependent on information received from its direct suppliers to conduct its good faith RCOI process;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•many Covered Suppliers are not subject to the reporting requirements of the Exchange Act;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•the Covered Suppliers operate with varying levels of sophistication and contact with the parties necessary to provide accurate information regarding the smelter name and location for all of the Identified Minerals; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•it is difficult to require cooperation from suppliers who are, in some cases, multiple tiers away from the smelter of the Identified Minerals.

As a result, the Corporation has not been able to identify all of the smelters from which certain Covered Suppliers sourced the Identified Minerals (other than those identified as from recycled or scrap sources). With respect to the Identified Minerals for which the Corporation was able to identify information about the smelter through the relevant Covered Supplier, the name and location of that smelter is indicated in the tables below. Because this information is provided by the Covered Suppliers, the Corporation cannot be certain that such smelters were, in fact, in the Corporation's supply chain.

*Conclusion* 

After exercising due diligence as described above, the Corporation has concluded that it is unable to determine whether or not the Covered Products qualify as "DRC conflict free" under the Rule, and as a result, the Covered Products are "DRC conflict undeterminable" as defined in Item 1.01(d)(5) of Form SD.

**Future Due Diligence Measures**

Going forward, the Corporation will seek to develop further transparency into its supply chain using its due diligence processes. During 2026, the Corporation intends to follow up with those Covered Suppliers that could not yet make a Conflict Minerals determination to ascertain their status. On an annual basis, the Corporation intends to

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contact each of its Covered Suppliers to obtain updated information if there have been changes to their supply chains or confirmation that their prior responses remain correct.

The Corporation also intends to adopt a Supplier Code of Conduct and Conflict Minerals Policy to help ensure that the Corporation's suppliers provide disclosures to the Corporation about their sources of Conflict Minerals and that the Conflict Minerals they procure are "conflict free."

**Website Disclosure** 

This Report, including this Conflict Minerals Disclosure, is available at the Corporation's website at www.ampcopgh.com. The information on, or otherwise available through, the Corporation's website is not part of this Report.

**Forward-Looking Statements** 

This Report includes forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995(the "Act") that involve various risks and uncertainties. All statements in this Report other than statements of historical fact are statements that are, or could be, deemed forward-looking statements within the meaning of such Act. Words such as "may," "intend," "will," "believe" and "expect," and other terms of similar meaning that indicate future events and trends are also generally intended to identify forward-looking statements. Forward-looking statements are not guarantees of future performance. Except as required by applicable law, the Corporation assumes no obligation, and disclaims any obligation, to update forward-looking statements whether as a result of new information, events or otherwise.

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

Appendix A

1. The following smelters were responsible for the tungsten sourced by suppliers of UES:

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| | |
|:---|:---|
| **Smelter Name** | **Location of Smelter** |
| Asia Tungsten Products Vietnam Ltd. | Viet Nam |
| Ganzhou Jiangwu Ferrotungsten Co., Ltd. | China |
| Shinwon Tungsten (Fujian Shanghang) Co., Ltd. | China |

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2. The following smelters were responsible for the tungsten sourced by suppliers of Aerofin:

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| | |
|:---|:---|
| **Smelter Name** | **Location of Smelter** |
| Chongyi Zhangyuan Tungsten Co., Ltd. | China |
| Jiangxi Yaosheng Tungsten Co., Ltd. | China |
| Wolfram Bergbau und Hutten AG | Austria |
| Xiamen Tungsten Co., Ltd. | China |

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3. The following smelters were responsible for the gold sourced by suppliers of Aerofin:

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| | |
|:---|:---|
| **Smelter Name** | **Location of Smelter** |
| Agosi AG | Germany |
| Aida Chemical Industries Co., Ltd. | Japan |
| AngloGold Ashanti Corrego do Sitio Mineracao | Brazil |
| Argor-Heraeus S.A. | Switzerland |
| Asahi Pretec Corp. | Japan |
| Asahi Refining Canada Ltd. | Canada |
| Asahi Refining USA Inc. | United States Of America |
| Asaka Riken Co., Ltd. | Japan |
| Aurubis AG | Germany |
| Boliden Ronnskar | Sweden |
| C. Hafner GmbH + Co. KG | Germany |
| Chimet S.p.A. | Italy |
| Dowa | Japan |
| Eco-System Recycling Co., Ltd. East Plant | Japan |
| Heimerle + Meule GmbH | Germany |
| Heraeus Metals Hong Kong Ltd. | China |
| Ishifuku Metal Industry Co., Ltd. | Japan |
| Istanbul Gold Refinery | Turkey |
| JX Nippon Mining & Metals Co., Ltd. | Japan |
| Kojima Chemicals Co., Ltd. | Japan |
| LS MnM Inc. | Korea, Republic Of |
| Materion | United States Of America |
| Matsuda Sangyo Co., Ltd. | Japan |
| Metalor Technologies (Hong Kong) Ltd. | China |
| Metalor Technologies (Singapore) Pte., Ltd. | Singapore |
| Metalor Technologies (Suzhou) Ltd. | China |
| Metalor Technologies S.A. | Switzerland |
| Metalor USA Refining Corporation | United States Of America |
| Metalurgica Met-Mex Penoles S.A. De C.V. | Mexico |
| Mitsubishi Materials Corporation | Japan |
| Mitsui Mining and Smelting Co., Ltd. | Japan |
| MKS PAMP SA | Switzerland |
| Nihon Material Co., Ltd. | Japan |
| Rand Refinery (Pty) Ltd. | South Africa |
| Royal Canadian Mint | Canada |
| Solar Applied Materials Technology Corp. | Taiwan, Province Of China |
| Sumitomo Metal Mining Co., Ltd. | Japan |
| Tanaka Kikinzoku Kogyo K.K. | Japan |
| Tokuriki Honten Co., Ltd. | Japan |
| Umicore S.A. Business Unit Precious Metals Refining | Belgium |
| United Precious Metal Refining, Inc. | United States Of America |
| Western Australian Mint (T/a The Perth Mint) | Australia |
| WIELAND Edelmetalle GmbH | Germany |

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4. The following smelters were responsible for the tantalum sourced by suppliers of Aerofin:

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| | |
|:---|:---|
| **Smelter Name** | **Location of Smelter** |
| Hengyang King Xing Lifeng New Materials Co., Ltd. | China |
| Mineracao Taboca S.A. | Brazil |
| Ningxia Orient Tantalum Industry Co., Ltd. | China |

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5. The following smelters were responsible for the tin sourced by suppliers of Aerofin:

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| | |
|:---|:---|
| **Smelter Name** | **Location of Smelter** |
| Alpha | United States Of America |
| Aurubis Beerse | Belgium |
| Aurubis Berango | Spain |
| Chifeng Dajingzi Tin Industry Co., Ltd. | China |
| China Tin Group Co., Ltd. | China |
| CRM Synergies | Spain |
| Dowa | Japan |
| EM Vinto | Bolivia (Plurinational State Of) |
| Fenix Metals | Poland |
| Gejiu Non-Ferrous Metal Processing Co., Ltd. | China |
| Guangdong Hanhe Non-Ferrous Metal Co., Ltd. | China |
| Luna Smelter, Ltd. | Rwanda |
| Magnu's Minerais Metais e Ligas Ltda. | Brazil |
| Malaysia Smelting Corporation Berhad (Port Klang) | Malaysia |
| Metallic Resources, Inc. | United States Of America |
| Mineracao Taboca S.A. | Brazil |
| Mining Minerals Resources SARL | Congo, Democratic Republic Of |
| Minsur | Peru |
| Mitsubishi Materials Corporation | Japan |
| OMSA | Bolivia (Plurinational State Of) |
| PT ATD Makmur Mandiri Jaya | Indonesia |
| PT Mitra Stania Prima | Indonesia |
| PT Mitra Sukses Globalindo | Indonesia |
| PT Putera Sarana Shakti (PT PSS) | Indonesia |
| PT Rajehan Ariq | Indonesia |
| PT Timah Tbk Kundur | Indonesia |
| PT Timah Tbk Mentok | Indonesia |
| Rui Da Hung | Taiwan, Province Of China |
| Thaisarco | Thailand |
| Tin Smelting Branch of Yunnan Tin Co., Ltd. | China |
| Tin Technology & Refining | United States Of America |
| White Solder Metalurgia e Mineracao Ltda. | Brazil |
| Yunnan Chengfeng Non-ferrous Metals Co., Ltd. | China |

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6. The following smelters were responsible for the tungsten sourced by suppliers of Buffalo Air Handling:

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| | |
|:---|:---|
| **Smelter Name** | **Location of Smelter** |
| A.L.M.T. TUNGSTEN Corp. | Japan |
| ACL Metais Eireli | Brazil |
| Asia Tungsten Products Vietnam Ltd. | Viet Nam |
| ATI Tungsten Materials | United States of America |
| Chenzhou Diamond Tungsten Products Co., Ltd. | China |
| China Molybdenum Co., Ltd. | China |
| Chongyi Zhangyuan Tungsten Co., Ltd. | China |
| Fujian Jinxin Tungsten Co., Ltd. | China |
| Ganzhou Haichuang Tungsten Co., Ltd. | China |
| Ganzhou Huaxing Tungsten Products Co., Ltd. | China |
| Ganzhou Jiangwu Ferrotungsten Co., Ltd. | China |
| Ganzhou Seadragon W & Mo Co., Ltd. | China |
| Ganzhou Yatai Tungsten Co., Ltd. | China |
| Global Tungsten & Powders Corp. | United States of America |
| Guangdong Xianglu Tungsten Co., Ltd. | China |
| H.C. Starck Smelting GmbH & Co. KG | Germany |
| H.C. Starck Tungsten GmbH | Germany |
| Hunan Chenzhou Mining Co., Ltd. | China |
| Hunan Chuangda Vanadium Tungsten Co., Ltd. Wuji | China |
| Hunan Chunchang Nonferrous Metals Co., Ltd. | China |
| Hunan Litian Tungsten Industry Co., Ltd. | China |
| Hydrometallurg, JSC | Russian Federation |
| Japan New Metals Co., Ltd. | Japan |
| Jiangwu H.C. Starck Tungsten Products Co., Ltd. | China |
| Jiangxi Dayu Longxintai Tungsten Co., Ltd. | China |
| Jiangxi Gan Bei Tungsten Co., Ltd. | China |
| Jiangxi Minmetals Gao'an Non-ferrous Metals Co., Ltd. | China |
| Jiangxi Tonggu Non-ferrous Metallurgical & Chemical Co., Ltd. | China |
| Jiangxi Tungsten Industry Group Co. Ltd. | China |
| Jiangxi Xinsheng Tungsten Industry Co., Ltd. | China |
| Jiangxi Xiushui Xianggan Nonferrous Metals Co., Ltd. | China |
| Jiangxi Yaosheng Tungsten Co., Ltd. | China |
| Kennametal Fallon | Belgium |
| Malipo Haiyu Tungsten Co., Ltd. | China |
| Moliren Ltd. | Russian Federation |
| Niagara Refining LLC | United States of America |
| Nui Phao H.C. Starck Tungsten Chemicals Manufacturing LLC | Viet Nam |
| Philippine Chuangxin Industrial Co., Inc. | Phillipines |
| South-East Nonferrous Metal Company Limited of Hengyang City | China |
| Tejing (Vietnam) Tungsten Co., Ltd. | Viet Nam |
| Unecha Refractory metals plant | Russian Federation |
| Vietnam Youngsun Tungsten Industry Co., Ltd. | Viet Nam |

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| | |
|:---|:---|
| **Smelter Name** | **Location of Smelter** |
| Wolfram Bergbau und Hutten AG | Austria |
| Woltech Korea Co., Ltd. | Korea, Republic Of |
| Xiamen Tungsten (H.C.) Co., Ltd. | China |
| Xiamen Tungsten Co., Ltd. | China |
| Xinfeng Huarui Tungsten & Molybdenum New Material Co., Ltd. | China |
| Xinhai Rendan Shaoguan Tungsten Co., Ltd. | China |
| Zhangyuan Tungsten Co Ltd | China |

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7. The following smelters were responsible for the tin sourced by suppliers of Buffalo Air Handling:

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| | |
|:---|:---|
| **Smelter Name** | **Location of Smelter** |
| Alent plc | United States of America |
| Alpha Assembly Solutions Inc | United States of America |
| Alpha Metals | United States of America |
| Alpha Metals Korea Ltd. | United States of America |
| Alpha Metals Taiwan | United States of America |
| An Vinh Joint Stock Mineral Processing Company | Viet Nam |
| Aurubis Beerse | Belgium |
| Aurubis Berango | Spain |
| Chengfeng Metals Co Pte Ltd | China |
| Chenzhou Yunxiang Mining and Metallurgy Co., Ltd. | China |
| Chifeng Dajingzi Tin Industry Co., Ltd. | China |
| China Tin (Hechi) | China |
| China Tin Group Co., Ltd. | China |
| China Tin Lai Ben Smelter Co., Ltd. | China |
| China Yunnan Tin Co Ltd. | China |
| CNMC (Guangxi) PGMA Co., Ltd. | China |
| Cookson | United States of America |
| Cookson (Alpha Metals Taiwan) | United States of America |
| Cookson Alpha Metals (Shenzhen) Co., Ltd. | United States of America |
| CRM Fundicao De Metais E Comercio De Equipamentos Eletronicos Do Brasil Ltda | Brazil |
| CRM Synergies | Spain |
| CV Ayi Jaya | Indonesia |
| CV Dua Sekawan | Indonesia |
| CV Gita Pesona | Indonesia |
| CV Nurjanah | Indonesia |
| CV Serumpun Sebalai | Indonesia |
| CV Tiga Sekawan | Indonesia |
| CV United Smelting | Indonesia |
| CV Venus Inti Perkasa | Indonesia |

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| | |
|:---|:---|
| **Smelter Name** | **Location of Smelter** |
| Dongguan Best Alloys Co., Ltd. | China |
| Dongguan CiEXPO Environmental Engineering Co., Ltd. | China |
| DongGuan DaLang BaoTai Solder Products Factory | China |
| Dowa Metaltech Co., Ltd. | Japan |
| Electro-Mechanical Facility of the Cao Bang Minerals & Metallurgy Joint Stock Company | Viet Nam |
| EM Vinto | Bolivia (Plurinational State Of) |
| Empresa Metalúrgica Vinto | Bolivia (Plurinational State Of) |
| Empressa Nacional de Fundiciones (ENAF) | Bolivia (Plurinational State Of) |
| Estanho de Rondônia S.A. | Brazil |
| Fabrica Auricchio | Brazil |
| Fenix Metals | Polan |
| Funsur Smelter | Peru |
| Gejiu City Datun Chengfeng Smelter | China |
| Gejiu City Fuxiang Industry and Trade Co., Ltd. | China |
| Gejiu Fengming Metallurgy Chemical Plant | China |
| Gejiu Fuxiang Gongmao Co., Ltd. | China |
| Gejiu Jinye Mineral Company | China |
| Gejiu Kai Meng Industry and Trade LLC | China |
| Gejiu Non-Ferrous Metal Processing Co., Ltd. | China |
| Gejiu Yunxin Nonferrous Electrolysis Co., Ltd. | China |
| Gejiu Zili Mining And Metallurgy Co., Ltd. | China |
| Global Advanced Metals Greenbushes Pty Ltd. | Australia |
| Guang Xi Liu Xhou | China |
| Guangdong Hanhe Non-Ferrous Metal Co., Ltd. | China |
| GuangXi China Tin | China |
| Guangxi Hua Shu Dan CO., LTD. | China |
| Guanyang Guida Nonferrous Metal Smelting Plant | China |
| HuiChang Hill Tin Industry Co., Ltd. | China |
| Huichang Jinshunda Tin Co., Ltd. | China |
| Hulterworth Smelter | Malaysia |
| Ikuno Tin Smelter | Japan |
| INDONESIAN STATE TIN CORPORATION MENTOK SMELTER | Indonesia |
| Jiangxi Ketai Advanced Material Co., Ltd. | China |
| Jiangxi Nanshan | China |
| Jiangxi New Nanshan Technology Ltd. | China |
| Kai Union Industry and Trade Co., Ltd. (China) | China |
| Kai Unita Trade Limited Liability Company | China |
| Kaimeng (Gejiu) Industry and Trade Co., Ltd. | China |
| Kundur Smelter | Indonesia |

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| | |
|:---|:---|
| **Smelter Name** | **Location of Smelter** |
| Liuzhhou China Tin | China |
| Longnan Chuangyue Environmental Protection Technology Development Co., Ltd | China |
| Luna Smelter, Ltd. | Rwanda |
| Ma'anshan Weitai Tin Co., Ltd. | China |
| Magnu's Minerais Metais e Ligas Ltda. | Brazil |
| Malaysia Smelting Corporation (MSC) | Malaysia |
| Malaysia Smelting Corporation Berhad (Port Klang) | Malaysia |
| Melt Metais e Ligas S.A. | Brazil |
| Mentok Smelter | Indonesia |
| Metallic Materials Branch of Guangxi China Tin Group Co.,Ltd. | China |
| Metallic Resources, Inc. | United States of America |
| Metallo Belgium N.V. | Belgium |
| Metallo Spain S.L.U. | Spain |
| Metallo-Chimique N.V. | Belgium |
| Mineracao Taboca S.A. | Brazil |
| Mining and processing tin-tungsten ore Giang Son - VQB Co., Ltd. | Viet Nam |
| Mining Minerals Resources SARL | Congo, Democratic Republic Of |
| Minsur | Peru |
| Mitsubishi Materials Corporation | Japan |
| Modeltech Sdn Bhd | Malaysia |
| MSC | Malaysia |
| Nankang Nanshan Tin Manufactory Co., Ltd. | China |
| Nanshan Tin Co. Ltd. | China |
| Nghe Tinh Non-Ferrous Metals Joint Stock Company | Viet Nam |
| Novosibirsk Tin Combine | Russian Federation |
| O.M. Manufacturing (Thailand) Co., Ltd. | Thailand |
| O.M. Manufacturing Philippines, Inc. | Phillipines |
| OMSA | Bolivia (Plurinational State Of) |
| P Kay Metal, Inc | United States of America |
| Pongpipat Company Limited | Myanmar |
| Precious Minerals and Smelting Limited | India |
| PT Aries Kencana Sejahtera | Indonesia |
| PT Arsed Indonesia | Indonesia |
| PT Artha Cipta Langgeng | Indonesia |
| PT ATD Makmur Mandiri Jaya | Indonesia |
| PT Babel Inti Perkasa | Indonesia |
| PT Bangka Prima Tin | Indonesia |
| PT Bangka Serumpun | Indonesia |
| PT Bangka Tin Industry | Indonesia |

---

------

---

| | |
|:---|:---|
| **Smelter Name** | **Location of Smelter** |
| PT Belitung Industri Sejahtera | Indonesia |
| PT Bukit Timah | Indonesia |
| PT Cipta Persada Mulia | Indonesia |
| PT DS Jaya Abadi | Indonesia |
| PT Eunindo Usaha Mandiri | Indonesia |
| PT Inti Stania Prima | Indonesia |
| PT Karimun Mining | Indonesia |
| PT Kijang Jaya Mandiri | Indonesia |
| PT Lautan Harmonis Sejahtera | Indonesia |
| PT Menara Cipta Mulia | Indonesia |
| PT Mitra Stania Prima | Indonesia |
| PT Mitra Sukses Globalindo | Indonesia |
| PT Panca Mega Persada | Indonesia |
| PT Premium Tin Indonesia | Indonesia |
| PT Prima Timah Utama | Indonesia |
| PT Putera Sarana Shakti (PT PSS) | Indonesia |
| PT Rajehan Ariq | Indonesia |
| PT Refined Bangka Tin | Indonesia |
| PT Sariwiguna Binasentosa | Indonesia |
| PT Stanindo Inti Perkasa | Indonesia |
| PT Sukses Inti Makmur | Indonesia |
| PT Sumber Jaya Indah | Indonesia |
| PT Tambang Timah | Indonesia |
| PT Timah (Persero) Tbk Kundur | Indonesia |
| PT Timah (Persero) Tbk Mentok | Indonesia |
| PT Timah Tbk Kundur | Indonesia |
| PT Timah Tbk Mentok | Indonesia |
| PT Tinindo Inter Nusa | Indonesia |
| PT Tommy Utama | Indonesia |
| Resind Industria e Comercio Ltda. | Brazil |
| Rikayaa Greentech Private Limited | India |
| Rui Da Hung | Taiwan, Province of China |
| Smelting Branch of Yunnan Tin Company Ltd | China |
| Soft Metais Ltda. | Brazil |
| Super Ligas | Brazil |
| Takehara PVD Materials Plant / PVD Materials Division of Mitsui Mining & Smelting Co., Ltd. | Japan |
| Thai Solder Industry Corp., Ltd. | Thailand |
| Thailand Smelting & Refining Co., Ltd. | Thailand |
| Thaisarco | Thailand |

---

------

---

| | |
|:---|:---|
| **Smelter Name** | **Location of Smelter** |
| The Gejiu cloud new colored electrolytic | China |
| Tin Products Manufacturing Co.LTD. of YTCL | Chain |
| Tin Smelting Branch of Yunnan Tin Co., Ltd. | China |
| Tin Technology & Refining | United States of America |
| Toboca/ Paranapenema | Brazil |
| Tuyen Quang Non-Ferrous Metals Joint Stock Company | Viet Name |
| Unit Timah Kundur PT Tambang | Indonesia |
| VQB Mineral and Trading Group JSC | Viet Nam |
| White Solder Metalurgia e Mineracao Ltda. | Brazil |
| Woodcross Smelting Company Limited | Uganda |
| XiHai - Liuzhou China Tin Group Co Ltd. | China |
| YTCL | China |
| Yunan Gejiu Yunxin Electrolyze Limited | China |
| Yunnan Adventure Co., Ltd. | China |
| Yunnan Chengfeng Non-ferrous Metals Co., Ltd. | China |
| YunNan Gejiu Yunxin Electrolyze Limited | China |
| Yunnan Gejiu Zili Metallurgy Co. Ltd. | China |
| Yunnan ride non-ferrous metal co., Ltd. | China |
| Yunnan Tin Company, Ltd. | China |
| Yunnan wind Nonferrous Metals Co., Ltd. | China |
| Yunnan Xi YE | China |
| Yunnan Yunfan Non-ferrous Metals Co., Ltd. | China |
| Yuntinic Resources | China |
| Yunxin Colored Electrolysis Company Limited | China |

---

------

8. The following smelters were responsible for the tungsten sourced by suppliers of Buffalo Pumps:

---

| | |
|:---|:---|
| **Smelter Name** | **Location of Smelter** |
| A.L.M.T. Tungsten Corp. | Japan |
| ACL Metais Eireli | Brazil |
| Albasteel Industria e Comercio de Ligas Para Fundicao Ltd. | Brazil |
| Allied Material Corporation | Japan |
| ALMT Corp | Japan |
| ALMT Sumitomo Group | Japan |
| Artek LLC | Russian Federation |
| Asia Tungsten Products Vietnam Ltd. | Viet Nam |
| ATI Metalworking Products | United States of America |
| ATI Tungsten Materials | United States of America |
| Chaozhou Xianglu Tungsten Industry Co., Ltd. | China |
| Chenzhou Diamond Tungsten Products Co., Ltd. | China |
| China Molybdenum Co., Ltd. | China |
| China Molybdenum Tungsten Co., Ltd. | China |
| China MuYe Tungsten Co,. Ltd. | China |
| Chongyi Zhangyuan Tungsten Co., Ltd. | China |
| CNMC (Guangxi) PGMA Co., Ltd. | China |
| Cronimet Brasil Ltda | Brazil |
| Dongkuk Industries Co., Ltd. | Korea, Republic Of |
| Fujian Xinlu Tungsten Co., Ltd. | China |
| Ganzhou Jiangwu Ferrotungsten Co., Ltd. | China |
| Ganzhou Seadragon W & Mo Co., Ltd. | China |
| GEM Co., Ltd. | China |
| Geo Enterprise | Georgia |
| Global Tungsten & Powders LLC | United States of America |
| Guangdong Xianglu Tungsten Co., Ltd. | China |
| H.C. Starck Smelting GmbH & Co. KG | Germany |
| H.C. Starck Tungsten GmbH | Germany |
| Han River Pelican State Alloy Co., Ltd. | China |
| Hannae For T Co., Ltd. | Korea, Republic Of |
| Hubei Green Tungsten Co., Ltd. | China |
| Human Chun-Chang non-ferrous Smelting & Concentrating Co., Ltd. | China |
| Hunan Chunchang Nonferrous Metals Co., Ltd. | China |
| Hunan Jintai New Material Co., Ltd. | China |
| Hunan Shizhuyuan Nonferrous Metals Co., Ltd. Chenzhou Tungsten Products Branch | China |
| Hydrometallurg, JSC | Russian Federation |
| Japan New Metals Co., Ltd. | Japan |
| Jiangwu H.C. Starck Tungsten Products Co., Ltd. | China |
| Jiangxi Gan Bei Tungsten Co., Ltd. | China |

---

------

---

| | |
|:---|:---|
| **Smelter Name** | **Location of Smelter** |
| Jiangxi Minmetals Gao'an Non-ferrous Metals Co., Ltd. | China |
| Jiangxi Tonggu Non-ferrous Metallurgical & Chemical Co., Ltd. | China |
| Jiangxi Xinsheng Tungsten Industry Co., Ltd. | China |
| Jiangxi Yaosheng Tungsten Co., Ltd. | China |
| Jing Yuan Tungsten Technology Co., Ltd. | Taiwan, Province of China |
| Jingmen Dewei GEM Tungsten Resources Recycling Co., Ltd. | China |
| JSC "Kirovgrad Hard Alloys Plant" | Russian Federation |
| Kenee Mining Corporation | Viet Nam |
| Kennametal Fallon | United States of America |
| Kennametal Huntsville | United States of America |
| Laos Southern Mining Smelting Sole Co., Ltd. | Lao People's Democratic Republic |
| Lianyou Metals Co., Ltd. | Taiwan, Province of China |
| Lianyou Resources Co., Ltd. | Taiwan, Province of China |
| LLC Vostok | Russian Federation |
| Malamet Smelting Sdn. Bhd. | Malaysia |
| Malipo Haiyu Tungsten Co., Ltd. | China |
| Masan High-Tech Materials | Viet Nam |
| Masan Tungsten Chemical LLC (MTC) | Viet Nam |
| Moliren Ltd. | Russian Federation |
| Nam Viet Cromit Joint Stock Company | Viet Nam |
| Nan Viet Ferrochrome Co., Ltd. | Viet Nam |
| Niagara Refining LLC | United States of America |
| NPP Tyazhmetprom LLC | Russian Federation |
| Nui Phao H.C. Starck Tungsten Chemicals Manufacturing LLC | Viet Nam |
| OOO "Technolom" 1 | Russian Federation |
| OOO "Technolom" 2 | Russian Federation |
| Philippine Bonway Manufacturing Industrial Corporation | Phillippines |
| Philippine Carreytech Metal Corp. | Phillipines |
| Philippine Chuangxin Industrial Co., Inc. | Phillipines |
| S.P.T. spol.s r.o. | Czechia |
| Shinwon Tungsten (Fujian Shanghang) Co., Ltd. | China |
| TANIOBIS Smelting GmbH & Co. KG | Germany |
| Tungamoy Metals Inc. | Korea, Republic Of |
| Tungsten Vietnam Joint Stock Company | Viet Nam |
| Unecha Refractory metals plant | Russian Federation |
| Uzbekistan Technological Metallurgical Complex JSC | Uzbekistan |
| WBH | Austria |
| WBH,Wolfram [Austria] | Austria |
| Wolfram Bergbau und Hutten AG | Austria |

---

------

---

| | |
|:---|:---|
| **Smelter Name** | **Location of Smelter** |
| Xiamen Tungsten (H.C.) Co., Ltd. | China |
| Xiamen Tungsten Co., Ltd. | China |
| Yudu Ansheng Tungsten Co., Ltd. | China |
| Zhangyuan Tungsten Co Ltd | China |

---

9. The following smelters were responsible for the gold sourced by suppliers of Buffalo Pumps:

---

| | |
|:---|:---|
| **Smelter Name** | **Location of Smelter** |
| 8853 S.p.A. | Italy |
| ABC Refinery Pty Ltd. | Australia |
| Abington Reldan Metals, LLC | United States of America |
| Advanced Chemical Company | United States of America |
| African Gold Refinery | Uganda |
| Agosi AG | Germany |
| AGR (Perth Mint Australia) | Australia |
| AGR Mathey | Australia |
| Aida Chemical Industries Co., Ltd. | Japan |
| AKITA Seiren | Japan |
| Al Etihad Gold LLC | United Arab Emirates |
| Al Etihad Gold Refinery DMCC | United Arab Emirates |
| Albino Mountinho Ltda. | Portugal |
| Alexy Metals | United States of America |
| Allgemeine Gold-und Silberscheideanstalt A.G. | Germany |
| Almalyk Mining and Metallurgical Complex (AMMC) | Uzbekistan |
| Amagasaki Factory, Hyogo Prefecture, Japan | Japan |
| AngloGold Ashanti Brazil | Brazil |
| AngloGold Ashanti Córrego do Sítio Mineração | Brazil |
| Anhui Tongling Nonferrous Metal Mining Co., Ltd. | China |
| ANZ (Perth Mint 4N) | Australia |
| ANZ Bank | Australia |
| Argor-Heraeus S.A. | Switzerland |
| Asahi Metalfine, Inc. | Japan |
| Asahi Pretec Corp. | Japan |
| Asahi Refining Canada Ltd. | Canada |
| Asahi Refining USA Inc. | United States of America |
| Asaka Riken Co., Ltd. | Japan |
| ATAkulche | Turkey |
| Atasay Kuyumculuk Sanayi Ve Ticaret A.S. | Turkey |
| Attero Recycling Pvt Ltd | India |
| AU Traders and Refiners | South Africa |
| Augmont Enterprises Private Limited | India |

---

------

---

| | |
|:---|:---|
| **Smelter Name** | **Location of Smelter** |
| Aurubis AG | Germany |
| Bangalore Refinery Pvt Ltd | India |
| Bangko Sentral ng Pilipinas (Central Bank of the Philippines) | Phillipines |
| Boliden Ronnskar | Sweden |
| C. Hafner GmbH + Co. KG | Germany |
| Caridad | Mexico |
| CCR Refinery - Glencore Canada Corporation | Canada |
| Cendres + Métaux S.A. | Switzerland |
| Central Bank of the Philippines Gold Refinery & Mint | Phillipines |
| CGR Metalloys Pvt Ltd. | India |
| CHALCO Yunnan Copper Co. Ltd. | China |
| Chemmanur Gold Refinery | India |
| Chimet S.p.A. | Italy |
| China Henan Zhongyuan Gold Smelter | China |
| China's Shandong Gold Mining Co., Ltd. | China |
| Chugai Mining | Japan |
| Coimpa Industrial Ltda | Brazil |
| Daye Non-Ferrous Metals Mining Ltd. | China |
| Degussa Sonne / Mond Goldhandel GmbH | Germany |
| Dijllah Gold Refinery FZC | United Arab Emirates |
| Do Sung Corporation | Korea, Republic Of |
| Dongwu Gold Group | China |
| Dosung metal | Korea, Republic Of |
| Dowa Kogyo k.k. | Japan |
| Dowa Metalmine Co. Ltd. | Japan |
| Dowa Metals & Mining Co. Ltd. | Japan |
| Eco-System Recycling Co., Ltd. East Plant | Japan |
| Eco-System Recycling Co., Ltd. North Plant | Japan |
| Eco-System Recycling Co., Ltd. West Plant | Japan |
| Ekaterinburg | Russian Federation |
| Elite Industech Co., Ltd. | Taiwan, Province of China |
| Emerald Jewel Industry India Limited (Unit 1) | India |
| Emerald Jewel Industry India Limited (Unit 2) | India |
| Emerald Jewel Industry India Limited (Unit 3) | India |
| Emerald Jewel Industry India Limited (Unit 4) | India |
| Emirates Gold DMCC | United Arab Emirates |
| Federal State Unitary Enterprise Moscow Special Processing Plant (FSUE MZSS) | Russian Federation |
| Fidelity Printers and Refiners Ltd. | Zimbabwe |
| FSE Novosibirsk Refinery | Russian Federation |

---

------

---

| | |
|:---|:---|
| **Smelter Name** | **Location of Smelter** |
| Fujairah Gold FZC | United Arab Emirates |
| Fujhara Refinery | United Arab Emirates |
| Fujian Zijin mining stock company gold smelter | China |
| Gasabo Gold Refinery Ltd | Rwanda |
| GG Refinery Ltd. | Tanzania, United Republic Of |
| GGC Gujrat Gold Centre Pvt. Ltd. | India |
| Gold by Gold Colombia | Colombia |
| Gold Coast Refinery | Ghana |
| Gold Mining in Shandong (Laizhou) Limited Company | China |
| Gold Refinery of Zijin Mining Group Co., Ltd. | China |
| Great Wall Precious Metals Co., Ltd. | China |
| Guangdong Gaoyao Co | China |
| Guangdong Jinding Gold Limited | China |
| Gujarat Gold Centre | India |
| Guoda Safina High-Tech Environmental Refinery Co., Ltd. | China |
| Hangzhou Fuchunjiang Smelting Co., Ltd. | China |
| HeeSung Metal Ltd. | Korea, Republic Of |
| Heimerle + Meule GmbH | Germany |
| Henan Zhongyuan Gold Refinery Co., Ltd. | China |
| Henan Zhongyuan Gold Smelter of Zhongjin Gold Co. Ltd. | China |
| Heraeus Germany GmbH Co. KG | Germany |
| Heraeus Metals Hong Kong Ltd. | China |
| Heraeus Precious Metals GmbH & Co. KG | Germany |
| Hunan Chenzhou Mining Group Co., Ltd. | China |
| Hunan Chenzhou Mining Industry Co. Ltd. | China |
| Hunan Guiyang yinxing Nonferrous Smelting Co., Ltd. | China |
| Hunan Yu Teng Non-Ferrous Metals Co., Ltd. | China |
| HwaSeong CJ CO., LTD. | Korea, Republic Of |
| Impala Platinum - Platinum Metals Refinery (PMR) | South Africa |
| Industrial Refining Company | Belgium |
| Inner Mongolia Qiankun Gold and Silver Refinery Share Co., Ltd. | China |
| International Precious Metal Refiners | United Arab Emirates |
| Ishifuku Metal Industry Co., Ltd. | Japan |
| Istanbul Gold Refinery | Turkey |
| Italpreziosi | Italy |
| Jalan & Company | India |
| Japan Mint | Japan |
| JCC | China |
| Jiangxi Copper Co., Ltd. | China |

---

------

---

| | |
|:---|:---|
| **Smelter Name** | **Location of Smelter** |
| Johnson Matthey Inc. (USA) | United States of America |
| Johnson Matthey Limited | Canada |
| JSC Ekaterinburg Non-Ferrous Metal Processing Plant | Russian Federation |
| JSC Novosibirsk Refinery | Russian Federation |
| JSC Uralelectromed | Russian Federation |
| JX Nippon Mining & Metals Co., Ltd. | Japan |
| K.A. Rasmussen | Norway |
| Kaloti Precious Metals | United Arab Emirates |
| Kazakhmys Smelting LLC | Kazakhstan |
| Kazzinc | Kazakhstan |
| Kennecott Utah Copper LLC | United States of America |
| KGHM Polska Miedz S.A. | Poland |
| Kochi daiicihi Yamaminami plant | Japan |
| Kojima Chemicals Co., Ltd. | Japan |
| Kojima Kagaku Yakuhin Co., Ltd | Japan |
| Kombinat Gorniczo Hutniczy Miedz Polska Miedz S.A. | Poland |
| Korea Zinc Co., Ltd. | Korea, Republic Of |
| Kosak Seiren | Japan |
| KUC | United States of America |
| Kundan Care Products Ltd. | India |
| Kyrgyzaltyn JSC | Kyrgystan |
| Kyshtym Copper-Electrolytic Plant ZAO | Russian Federation |
| La Caridad | Mexico |
| Laizhou Shandong | China |
| L'azurde Company For Jewelry | Saudi Arabia |
| LinBao Gold Mining | China |
| Lingbao Gold Co., Ltd. | China |
| Lingbao Jinyuan Tonghui Refinery Co., Ltd. | China |
| L'Orfebre S.A. | Andorra |
| LS MnM Inc. | Korea, Republic Of |
| LT Metal Ltd. | Korea, Republic Of |
| Luoyang Zijin Yinhui Gold Refinery Co., Ltd. | China |
| Luoyang Zijin Yinhui Gold Smelting | China |
| Luoyang Zijin Yinhui Metal Smelt Co Ltd. | China |
| Marsam Metals | Brazil |
| Materion | United States of America |
| Matsuda Sangyo Co., Ltd. | Japan |
| MD Overseas | India |
| MEM(Sumitomo Group) | Japan |

---

------

---

| | |
|:---|:---|
| **Smelter Name** | **Location of Smelter** |
| Metal Concentrators SA (Pty) Ltd. | South Africa |
| Metalurgica Met-Mex Penoles, S.A. de C.V | Mexico |
| Metallix Refining Inc. | United States of America |
| Metallurgie Hoboken Overpelt | Belgium |
| Metalor Switzerland | Switzerland |
| Metalor Technologies (Hong Kong) Ltd. | China |
| Metalor Technologies (Singapore) Pte., Ltd. | Singapore |
| Metalor Technologies (Suzhou) Ltd. | China |
| Metalor Technologies S.A. | Switzerland |
| Metalor USA Refining Corporation | United States of America |
| Minera Titan del Peru SRL (MTP) - Belen Plant | Peru |
| Mitsubishi Materials Corporation | Japan |
| Mitsui Kinzoku Co., Ltd. | Japan |
| Mitsui Mining and Smelting Co., Ltd. | Japan |
| Mks Pamp SA | Switzerland |
| MMTC-PAMP India Pvt., Ltd. | India |
| Modeltech Sdn Bhd | Malaysia |
| Morris and Watson | New Zealand |
| Moscow Special Alloys Processing Plant | Russian Federation |
| Nadir Metal Rafineri San. Ve Tic. A.S. | Turkey |
| Navoi Mining and Metallurgical Combinat | Uzbekistan |
| NH Recytech Company | Korea, Republic Of |
| Nihon Material Co., Ltd. | Japan |
| Noble Metal Services | United States of America |
| Nohon Material Corporation | Japan |
| Norddeutsche Affinererie AG | Germany |
| Ogussa Osterreichische Gold- und Silber-Scheideanstalt GmbH | Austria |
| Ohura Precious Metal Industry Co., Ltd. | Japan |
| OJSC "The Gulidov Krasnoyarsk Non-Ferrous Metals Plant" (OJSC Krastsvetmet) | Russian Federation |
| OJSC Krastsvetmet | Russian Federation |
| OJSC Novosibirsk Refinery | Russian Federation |
| PAMP S.A. | Switzerland |
| Pan Pacific Copper Co Ltd. | Japan |
| Pease & Curren | United States of America |
| Penglai Penggang Gold Industry Co., Ltd. | China |
| Perth Mint | Australia |
| Perth Mint (ANZ) | Australia |
| Planta Recuperadora de Metales SpA | Chile |
| Prioksky Plant of Non-Ferrous Metals | Russian Federation |

---

------

---

| | |
|:---|:---|
| **Smelter Name** | **Location of Smelter** |
| Produits Artistiques de Métaux | Switzerland |
| PT Aneka Tambang (Persero) Tbk | Indonesia |
| PX Precinox S.A. | Switzerland |
| QG Refining, LLC | United States of America |
| Rand Refinery (Pty) Ltd. | South Africa |
| Refinery LS-Nikko Copper Inc. | Korea, Republic Of |
| Refinery of Seemine Gold Co., Ltd. | China |
| Remondis Argentia B.V. | Netherlands |
| Remondis PMR B.V. | Netherlands |
| Royal Canadian Mint | Canada |
| SAAMP | France |
| Sabin Metal Corp. | United States of America |
| Safimet S.p.A | Italy |
| SAFINA A.S. | Czechia |
| Saganoseki Smelter & Refinery | Japan |
| Sai Refinery | India |
| United Precious Metal Refining, Inc. | United Arab Emirates |
| Samdok Metal | Korea, Republic Of |
| Samduck Precious Metals | Korea, Republic Of |
| Samwon Metals Corp. | Korea, Republic Of |
| SEMPSA Joyería Platería S.A. | Spain |
| Sempsa JP (Cookson Sempsa) | Spain |
| Shan Dong Huangjin | China |
| Shandong Gold Mine(Laizhou) Smelter Co., Ltd. | China |
| Shandong Gold Smelting Co., Ltd. | China |
| Shandong Guoda Gold Co., Ltd. | China |
| Shandong Humon Smelting Co., Ltd. | China |
| Shandong Middlings JinYe Group Co., LTD | China |
| Shandong Tarzan Bio-Gold Industry Co., Ltd. | China |
| Shandong Tiancheng Biological Gold Industrial Co., Ltd. | China |
| Shandong Zhaojin Gold & Silver Refinery Co., Ltd. | China |
| Shangdong Gold (Laizhou) | China |
| Shenzhen CuiLu Gold Co., Ltd. | China |
| Shenzhen Jinjunwei Resource Comprehensive Development Co., LTD. | China |
| Shenzhen Zhonghenglong Real Industry Co., Ltd. | China |
| Shirpur Gold Refinery Ltd. | India |
| Shonan Plant Tanaka Kikinzoku | Japan |
| Shyolkovsky | Russian Federation |
| Sichuan Tianze Precious Metals Co., Ltd. | China |

---

------

---

| | |
|:---|:---|
| **Smelter Name** | **Location of Smelter** |
| Singapore Tanaka | Japan |
| Singway Technology Co., Ltd. | Taiwan, Province Of China |
| SMM | Japan |
| SOE Shyolkovsky Factory of Secondary Precious Metals | Russian Federation |
| Solar Applied Materials Technology Corp. | Taiwan, Province Of China |
| Solartech | Taiwan, Province Of China |
| Sovereign Metals | India |
| State Research Institute Center for Physical Sciences and Technology | Lithuania |
| Sudan Gold Refinery | Sudan |
| Sumitomo Kinzoku Kozan K.K. | Japan |
| Sumitomo Metal Mining Co., Ltd. | Japan |
| SungEel HiMetal Co., Ltd. | Korea, Republic Of |
| SungEel HiTech | Korea, Republic Of |
| Super Dragon Technology Co., Ltd. | Taiwan, Province Of China |
| T.C.A S.p.A | Italy |
| Takehara Refinery | Japan |
| Tamano Smelter | Japan |
| Tanaka Denshi Kogyo K.K | Japan |
| Tanaka Electronics (Hong Kong) Pte. Ltd. | Japan |
| Tanaka Electronics (Malaysia) SDN. BHD. | Japan |
| Tanaka Electronics (Singapore) Pte. Ltd. | Japan |
| Tanaka Kikinzoku International | Japan |
| Tanaka Kikinzoku Kogyo K.K | Japan |
| Tanaka Precious Metals | Japan |
| The Great Wall Gold and Silver Refinery of China | China |
| The Perth Mint | Australia |
| The Refinery of Shandong Gold Mining Co., Ltd. | China |
| Titan Company Limited, Jewelry Division | India |
| Tokuriki Honten Co., Ltd. | Japan |
| Tongling Nonferrous Metals Group Co., Ltd. | China |
| Tony Goetz NV | Belgium |
| TOO Tau-Ken-Altyn | Kazakhstan |
| Torecom | Korea, Republic Of |
| Ubro-Union of Brazilian Refiners | Brazil |
| Umicore Precious Metals Refining Hoboken | Belgium |
| Umicore Precious Metals Thailand | Thailand |
| Umicore S.A. Business Unit Precious Metals Refining | Belgium |
| United Precious Metal Refining, Inc. | United States of America |
| Valcambi S.A. | Switzerland |

---

------

---

| | |
|:---|:---|
| **Smelter Name** | **Location of Smelter** |
| Weee Refining | France |
| Western Australian Mint (T/a The Perth Mint) | Australia |
| Wieland Edelmetalle GmbH | Germany |
| Williams Advanced Materials | United States of America |
| Xstrata | Canada |
| Yamamoto Precious Metal Co., Ltd. | Japan |
| Yamamoto Precision Metals | Japan |
| Yantai NUS Safina tech environmental Refinery Co. Ltd. | China |
| Yilida Resources Technology Co., Ltd. | Taiwan, Province Of China |
| Yokohama Metal Co., Ltd. | Japan |
| Yunnan Copper Industry Co., Ltd. | China |
| Zhao Yuan Gold Mine | China |
| Zhao Yuan Gold Smelter of ZhongJin | China |
| Zhao Yuan Jin Kuang | China |
| Zhaojin Mining Industry Co., Ltd. | China |
| zhaojinjinyinyelian | China |
| Zhaoyuan Gold Group | China |
| Zhongjin Gold Corporation Limited | China |
| Zhongyuan Gold Smelter of Zhongjin Gold Corporation | China |
| Zijin Kuang Ye Refinery | China |
| Zijin Mining Industry Corporation | China |

---

------

10. The following smelters were responsible for the tantalum sourced by suppliers of Buffalo Pumps:

---

| | |
|:---|:---|
| **Smelter Name** | **Location of Smelter** |
| 5D Production OU | Estonia |
| AMG Brasil | Brazil |
| Conghua Tantalum and Niobium Smeltry | China |
| D Block Metals, LLC | United States of America |
| F & X | China |
| F&X Electro-Materials Ltd. | China |
| FIR Metals & Resource Ltd. | China |
| Global Advanced Metals Aizu | Japan |
| Global Advanced Metals Boyertown | United States of America |
| Guangdong Rising Rare Metals-EO Materials Ltd. | China |
| Guangdong Zhiyuan New Material Co., Ltd. | China |
| H.C. Starck Co., Ltd. | Thailand |
| H.C. Starck Inc. | United States of America |
| H.C. Starck Ltd. | Japan |
| H.C. Starck Smelting GmbH & Co. KG | Germany |
| H.C. Starck Tantalum and Niobium GmbH | Germany |
| Hengyang King Xing Lifeng New Materials Co., Ltd. | China |
| Jiangxi Dinghai Tantalum & Niobium Co., Ltd. | China |
| Jiangxi Sanshi Nonferrous Metals Co., Ltd. | China |
| Jiangxi Suns Nonferrous Materials Co. Ltd. | China |
| Jiangxi Tuohong New Raw Material | China |
| JiuJiang JinXin Nonferrous Metals Co., Ltd. | China |
| Jiujiang Nonferrous Metals Smelting Company Limited | China |
| Jiujiang Tanbre Co., Ltd. | China |
| Jiujiang Zhongao Tantalum & Niobium Co., Ltd. | China |
| KEMET Blue Metals | Mexico |
| KEMET de Mexico | Mexico |
| LSM Brasil S.A. | Brazil |
| Materion Newton Inc. | United States of America |
| Metallurgical Products India Pvt. Ltd. (MPIL) | India |
| Mineracao Taboca S.A. | Brazil |
| Mitsui Kinzoku Company, Ltd. | Japan |
| Mitsui Mining and Smelting Co., Ltd. | Japan |
| Molycorp Silmet A.S. | Estonia |
| Ningxia Non-Ferrous Metal Smeltery | China |
| Ningxia Orient Tantalum Industry Co., Ltd. | China |
| NPM Silmet AS | Estonia |
| PowerX Ltd. | Rwanda |
| Resind Indústria e Comércio Ltda. | Brazil |

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| | |
|:---|:---|
| **Smelter Name** | **Location of Smelter** |
| RFH Tantalum Smeltry Co., Ltd. | China |
| RFH Yancheng Jinye New Material Technology Co., Ltd. | China |
| Solikamsk Magnesium Works OAO | Russian Federation |
| Solikamsk Metal Works | Russian Federation |
| Taki Chemical Co., Ltd. | Japan |
| TANIOBIS Co., Ltd. | Thailand |
| TANIOBIS GmbH | Germany |
| TANIOBIS Japan Co., Ltd. | Japan |
| TANIOBIS Smelting GmbH & Co. KG | Germany |
| Telex Metals | United States of America |
| Ulba Metallurgical Plant JSC | Kazakhstan |
| XinXing HaoRong Electronic Material Co., Ltd. | China |
| Ximei Resources (Guangdong) Limited | China |
| Yancheng Jinye New Material Technology Co., Ltd. | China |
| Yanling Jincheng Tantalum & Niobium Co., Ltd. | China |

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11. The following smelters were responsible for the tin sourced by suppliers of Buffalo Pumps:

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| | |
|:---|:---|
| **Smelter Name** | **Location of Smelter** |
| Alent plc | United States of America |
| Alpha Assembly Solutions Inc. | United States of America |
| Alpha Metals | United States of America |
| Alpha Metals Korea Ltd. | United States of America |
| Alpha Metals Taiwan | United States of America |
| An Vinh Joint Stock Mineral Processing Company | Viet Nam |
| Aurubis Beerse | Belgium |
| Aurubis Berango | Spain |
| Chengfeng Metals Co Pte Ltd. | China |
| Chenzhou Yun Xiang mining limited liability company | China |
| Chenzhou Yunxiang Mining and Metallurgy Co., Ltd. | China |
| Chifeng Dajingzi Tin Industry Co., Ltd. | China |
| China Tin (Hechi) | China |
| China Tin Group Co., Ltd. | China |
| China Tin Lai Ben Smelter Co., Ltd. | China |
| China Yunnan Tin Co Ltd. | China |
| Cookson | United States of America |
| Cookson (Alpha Metals Taiwan) | United States of America |
| Cookson Alpha Metals (Shenzhen) Co., Ltd. | United States of America |
| CRM Fundição De Metais E Comércio De Equipamentos Eletrônicos Do Brasil Ltda | Brazil |
| CRM Synergies | Spain |
| CV Serumpun Sebalai | Indonesia |
| CV Tiga Sekawan | Indonesia |

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| | |
|:---|:---|
| **Smelter Name** | **Location of Smelter** |
| Dongguan Best Alloys Co., Ltd. | China |
| Dongguan CiEXPO Environmental Engineering Co., Ltd. | China |
| DongGuan DaLang BaoTai Solder Products Factory | China |
| Dowa Metaltech Co., Ltd. | Japan |
| Electro-Mechanical Facility of the Cao Bang Minerals & Metallurgy Joint Stock Company | Viet Nam |
| EM Vinto | Bolivia (Plurinational State Of) |
| Empressa Nacional de Fundiciones (ENAF) | Bolivia (Plurinational State Of) |
| Estanho de Rondônia S.A. | Brazil |
| Fabrica Auricchio Industria e Comercio Ltda. | Brazil |
| Fenix Metals | Poland |
| Funsur Smelter | Peru |
| Gejiu City Datun Chengfeng Smelter | China |
| Gejiu City Fuxiang Industry and Trade Co., Ltd. | China |
| Gejiu Fuxiang Gongmao Co., Ltd. | China |
| Gejiu Kai Meng Industry and Trade LLC | China |
| Gejiu Non-Ferrous Metal Processing Co., Ltd. | China |
| Gejiu Yunxin Nonferrous Electrolysis Co., Ltd. | China |
| Gejiu Zili Mining And Metallurgy Co., Ltd. | China |
| Global Advanced Metals Greenbushes Pty Ltd. | Australia |
| Guang Xi Liu Xhou | China |
| Guang Xi Liu Zhou | China |
| Guangdong Hanhe Non-Ferrous Metal Co., Ltd. | China |
| GuangXi China Tin | China |
| Guangxi Hua Shu Dan CO., LTD. | China |
| HuiChang Hill Tin Industry Co., Ltd. | China |
| Hulterworth Smelter | Malaysia |
| Ikuno Tin Smelter | Japan |
| Indonesian State Tin Corporation Mentok Smelter | Indonesia |
| Jiangxi Nanshan | China |
| Jiangxi New Nanshan Technology Ltd. | China |
| Kai Union Industry and Trade Co., Ltd. (China) | China |
| Kai Unita Trade Limited Liability Company | China |
| Kaimeng (Gejiu) Industry and Trade Co., Ltd. | China |
| Kundur Smelter | Indonesia |
| Liuzhhou China Tin | China |
| Longnan Chuangyue Environmental Protection Technology Development Co., Ltd | China |
| Luna Smelter, Ltd. | Rwanda |
| Ma'anshan Weitai Tin Co., Ltd. | China |
| Magnu's Minerais Metais e Ligas Ltda. | Brazil |

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| | |
|:---|:---|
| **Smelter Name** | **Location of Smelter** |
| Malaysia Smelting Corporation (MSC) | Malaysia |
| Malaysia Smelting Corporation Berhad (Port Klang) | Malaysia |
| Melt Metais e Ligas S.A. | Brazil |
| Mentok Smelter | Indonesia |
| Metallic Materials Branch of Guangxi China Tin Group Co.,Ltd. | China |
| Metallic Resources, Inc. | United States of America |
| Metallo Belgium N.V. | Belgium |
| Metallo Spain S.L.U. | Spain |
| Mineracao Taboca SA | Brazil |
| Mining and processing tin-tungsten ore Giang Son - VQB Co., Ltd. | Viet Nam |
| Mining Minerals Resources SARL | Congo, Democratic Republic Of |
| Minsur | Peru |
| Mitsubishi Materials Corporation | Japan |
| Modeltech Sdn Bhd | Malaysia |
| MSC | Malaysia |
| Nankang Nanshan Tin Manufactory Co., Ltd. | China |
| Nanshan Tin Co. Ltd. | China |
| Nghe Tinh Non-Ferrous Metals Joint Stock Company | Viet Nam |
| Novosibirsk Processing Plant Ltd. | Russian Federation |
| Novosibirsk Tin Combine | Russian Federation |
| O.M. Manufacturing (Thailand) Co., Ltd. | Thailand |
| O.M. Manufacturing Philippines, Inc. | Phillipines |
| OMSA | Bolivia (Plurinational State Of) |
| P Kay Metal, Inc | United States of America |
| Pongpipat Company Limited | Mynamar |
| Precious Minerals and Smelting Limited | India |
| PT Arsed Indonesia | Indonesia |
| PT ATD Makmur Mandiri Jaya | Indonesia |
| PT Bangka Prima Tin | Indonesia |
| PT Cipta Persada Mulia | Indonesia |
| PT Mitra Stania Prima | Indonesia |
| PT Mitra Sukses Globalindo | Indonesia |
| PT Premium Tin Indonesia | Indonesia |
| PT Prima Timah Utama | Indonesia |
| PT Putera Sarana Shakti (PT PSS) | Indonesia |
| PT Rajehan Ariq | Indonesia |
| PT Tambang Timah | Indonesia |
| PT Timah Tbk Kundur | Indonesia |
| PT Timah Tbk Mentok | Indonesia |

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| | |
|:---|:---|
| **Smelter Name** | **Location of Smelter** |
| Resind Indústria e Comércio Ltda. | Brazil |
| Rikayaa Greentech Private Limited | India |
| Rui Da Hung | Taiwan, Province of China |
| Smelting Branch of Yunnan Tin Company Ltd | China |
| Super Ligas | Brazil |
| Takehara PVD Materials Plant / PVD Materials Division of MITSUI MINING & SMELTING CO., LTD. | Japan |
| Thai Solder Industry Corp., Ltd. | Thailand |
| Thailand Smelting & Refining Co Ltd | Thailand |
| Thaisarco | Thailand |
| The Gejiu cloud new colored electrolytic | China |
| Tin Products Manufacturing Co.LTD. of YTCL | China |
| Tin Smelting Branch of Yunnan Tin Co., Ltd. | China |
| Tin Technology & Refining | United States of America |
| Toboca/ Paranapenema | Brazil |
| Tuyen Quang Non-Ferrous Metals Joint Stock Company | Viet Nam |
| Unit Timah Kundur PT Tambang | Indonesia |
| VQB Mineral and Trading Group JSC | Viet Nam |
| White Solder Metalurgia e Mineração Ltda. | Brazil |
| Woodcross Smelting Company Limited | Uganda |
| XiHai - Liuzhou China Tin Group Co. Ltd. | China |
| YTCL | China |
| Yunan Gejiu Yunxin Electrolyze Limited | China |
| Yunnan Adventure Co., Ltd. | China |
| Yunnan Chengfeng Non-ferrous Metals Co., Ltd. | China |
| YunNan Gejiu Yunxin Electrolyze Limited | China |
| Yunnan Gejiu Zili Metallurgy Co. Ltd. | China |
| Yunnan ride non-ferrous metal co., Ltd. | China |
| Yunnan Tin Company, Ltd. | China |
| Yunnan wind Nonferrous Metals Co., Ltd. | China |
| Yunnan Xi YE | China |
| Yunnan Yunfan Non-ferrous Metals Co., Ltd. | China |
| Yuntinic Resources | China |
| Yunxin Colored Electrolysis Company Limited | China |

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**<u>Item 1.02 Exhibit</u>**

None.

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**Section 2 - Exhibits**

**<u>Item 2.01 Exhibits</u>**

None.

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**SIGNATURE**

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 undersigned hereunto duly authorized.

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| | | |
|:---|:---|:---|
|  |  | AMPCO-PITTSBURGH CORPORATION |
|  |  | (Registrant) |
| Date: | May 29, 2026 |  |
|  |  | /s/ David G. Anderson |
|  |  | (Signature) |
|  |  | David G. Anderson |
|  |  | Vice President, Chief Financial Officer and Treasurer |

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