United States

Securities and Exchange Commission

Washington, D.C. 20549

FORM SD

SPECIALIZED DISCLOSURE REPORT

Colfax Corporation

(Exact name of registrant as specified in its charter)

Bradley J. Tandy, Senior Vice President and Interim General Counsel

(301) 323-9000

(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:

Section 1—Conflict Minerals Disclosure

Item 1.01 Conflict Minerals Disclosure and Report

As provided for in Rule 13p-1 under the Securities Exchange Act of 1934, as amended, and Form SD, a Conflict Minerals Report is provided as an exhibit to this Form SD and is available at the following Internet website: http://ir.colfaxcorp.com/investor-relations. The information contained on our website is not incorporated by reference into this Form SD or our Conflict Minerals Report and should not be considered part of this Form SD or the Conflict Minerals Report.

Item 1.02 Exhibit

The Conflict Minerals Report described in Item 1.01 is filed as Exhibit 1.01 to this Form SD.

Section 2—Exhibits

Item 2.01 Exhibits

Exhibit 1.01 – Conflict Minerals Report for the calendar year ended December 31, 2018

1

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.

EXHIBIT INDEX

Exhibit 1.01

Conflict Minerals Report

Colfax Corporation has included this Conflict Minerals Report as an exhibit to its Form SD for the period from January 1^st 2018 to December 31^st 2018 as provided for in Rule 13p-1 under the Securities Exchange Act of 1934, as amended, and Form SD (collectively, the “Conflict Minerals Rule”). The date of filing of this Conflict Minerals Report is May 31, 2019.

Unless the context indicates otherwise, the terms “Colfax,” “we,” “its,” “us,” and “our” refer to Colfax Corporation and its consolidated subsidiaries. As used herein, “Conflict Minerals” or “3TG” is defined as, consistent with the Conflict Minerals Rule, cassiterite, columbite-tantalite (coltan), gold, wolframite and the derivatives tin, tantalum and tungsten.

Forward-Looking Statements

This document contains forward-looking statements within the meaning of the federal securities laws. Any statements that do not relate to historical or current facts or matters are forward-looking statements. You can identify some of the forward-looking statements by the use of forward-looking words, such as “intend” and the like, or the use of future tense. Statements concerning current conditions may also be forward-looking if they imply a continuation of current conditions. Examples of forward-looking statements include, but are not limited to, statements concerning the additional steps that we intend to take to mitigate the risk that our necessary 3TG benefit armed groups.

Forward-looking statements are subject to risks and uncertainties that could cause actual actions or performance to differ materially from those expressed in the forward-looking statements. These risks and uncertainties include, but are not limited to, (1) the continued implementation of satisfactory traceability and other compliance measures by our direct and indirect suppliers on a timely basis or at all, (2) whether smelters and refiners and other market participants responsibly source 3TG, and (3) political and regulatory developments, whether in the Democratic Republic of the Congo (“DRC”) region, the United States or elsewhere. You are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date of filing of this document. We do not intend, and undertake no obligation, to publish revised forward-looking statements to reflect events or circumstances after the date of filing of this document or to reflect the occurrence of unanticipated events.

Company and Product Information

Colfax Corporation is a leading diversified technology company that provides orthopedic, fabrication technology, and air and gas handling and products and services to customers around the world principally under the DJO, ESAB, and Howden brands.

Our in-scope product categories for 2018 were: (1) gas- and air-handling products, consisting of heavy-duty centrifugal and axial fans, rotary heat exchangers and gas compressors; and (2) welding equipment, cutting equipment and automated welding and cutting systems. For a further discussion of our products, see our Annual Report on Form 10-K for the year ended December 31, 2018. The information contained in our Form 10-K and other external materials referenced herein, including our website, is not incorporated by reference into this Conflict Minerals Report or our Form SD and should not be considered part of this Conflict Minerals Report or the Form SD.

Applicability of the Conflict Minerals Rule to Our Company

We are subject to the Conflict Minerals Rule because some of the products that we manufacture contain 3TG that are necessary to their functionality or production. Our in-scope products contain tin, tantalum, tungsten and gold, although each in-scope product does not contain all four 3TG.

We generally do not source 3TG from smelters or refiners and have no direct relationships with mines, and we believe that we are in most cases many levels removed from all of these market participants. However, through the efforts described in this Conflict Minerals Report, we seek to ensure that our sourcing practices are consistent with our Conflict Minerals Policy, which is described below, and encourage conflict free sourcing in our supply chain.

1

Product, smelter and refiner information in respect of 2018 is described under “Product Information” below and on Annex A. For 2018, each of our in-scope products contained 3TG content for which we were unable to determine the origin. None of the necessary 3TG contained in our in-scope products were determined by us to directly or indirectly finance or benefit armed groups in the DRC or an adjoining country. However, we did not conclude that any of our products were “DRC conflict free.” The terms “adjoining country,” “armed group” and “DRC conflict free” have the meanings contained in the Conflict Minerals Rule.

Our Conflict Minerals Policy

We are committed to being a responsible corporate citizen and are opposed to human rights abuses such as are occurring in the DRC. To this end, we have adopted and communicated to our suppliers and the public a company policy (the “Conflict Minerals Policy”) for the supply chain of 3TG.

The Conflict Minerals Policy includes, but is not limited to, our expectations that:

We do not embargo sourcing of 3TG from the DRC region and encourage our suppliers to continue to source responsibly from the region, from sources that do not support conflict.

Our policy is available on our website at http://ir.colfaxcorp.com/static-files/5f7e2a02-e1de-4317-aa11-f1a284e476c0.

Reasonable Country of Origin Inquiry Information

As required by the Conflict Minerals Rule, for 2018, we conducted a “reasonable country of origin inquiry.” For our reasonable country of origin inquiry, to the extent applicable, we utilized the same processes and procedures as for our due diligence, in particular Steps 1 and 2 of the OECD Guidance, which are discussed below.

Our inquiry included approximately 7,750 suppliers (the “Suppliers”) that we identified as having provided us with components, parts or products that contain 3TG or that we believe may have provided us with components, parts or products that contain 3TG. For 2018, the Suppliers identified to us 315 smelters and refiners that processed or may have processed the necessary 3TG contained in our in-scope products, as shown and described under Annex A below. These smelters and refiners include 254 smelters and refiners identified as “Conformant” and 5 identified as “Active,” each as defined in Annex A. This information is based primarily on company-level declarations from Suppliers. Accordingly, many of these smelters and refiners may not be part of our supply chain, as we generally were not able to collect data at the product-level.

Based on the results of our reasonable country of origin inquiry, we conducted due diligence for 2018. These due diligence efforts are discussed below.

Due Diligence Program

Design Framework

We designed our due diligence measures relating to 3TG to conform with, in all material respects, the criteria set forth in the OECD Guidance, Third Edition, including the related Supplements for tin, tantalum and tungsten and for gold (hereinafter referred to as the “OECD Guidance”).

2

Selected Elements of our Due Diligence Program

The OECD Guidance has established a five-step framework for due diligence as a basis for responsible global supply chain management of minerals from conflict-affected and high-risk areas. Selected elements of our due diligence program are discussed below. However, these are not all of the elements of the program that we have put in place to help ensure that the 3TG contained in our in-scope products are responsibly sourced. The headings below conform to the headings used in the OECD Guidance for each of the five steps.

3

254 of the identified smelters and refiners were listed as Conformant by the RMI and 5 were listed as Active, as of May 20, 2019. Please see Annex A below for further information regarding the smelters and refiners identified to us through our reasonable county of origin inquiry and due diligence.

The Service Provider bases its country of origin determinations on publicly available information, its outreach to smelters and refiners and information provided by suppliers in their completed CMRTs. Consistent with the foregoing, to the extent that a smelter or refiner identified by a Supplier was not listed as Conformant by the RMI, the Service Provider undertook an additional review to attempt to determine whether that smelter or refiner obtained 3TG from sources that directly or indirectly financed or benefitted armed groups in the DRC or an adjoining country. The Service Provider attempted to reach out to the smelter or refiner directly and conducted research to gain more information about the smelter’s or refiner’s sourcing practices, including the countries of origin of the minerals that it processes, the transit and transfer of the minerals that it processes and whether it has in place internal due diligence procedures or other processes to track the chain-of-custody of its 3TG.

In connection with our due diligence, we utilize and rely on information made available by the RMI concerning independent third-party audits of smelters and refiners to assess smelter and refiner due diligence.

We file a Form SD and Conflict Minerals Report with the Securities and Exchange Commission and make these filings available on our website at http://ir.colfaxcorp.com/investor-relations.

4

Identified Smelters and Refiners

In connection with our reasonable country of origin inquiry or due diligence, as applicable, the Suppliers identified to us the smelters and refiners listed on Annex A below either as part of our supply chain or as potentially having processed the necessary 3TG contained in our in-scope products in 2018. Due to our position in the supply chain, which is discussed earlier in this Conflict Minerals Report, we rely on our suppliers for accurate smelter and refiner information and our due diligence measures do not provide absolute certainty regarding the source and chain of custody of the necessary 3TG contained in our in-scope products.

We endeavored to determine the mine or location of origin of the 3TG contained in our in-scope products by requesting that the Suppliers provide us or our Service Provider with a completed CMRT, and through the other activities described herein that were taken by us or the Service Provider.

Future Risk Mitigation Efforts

We intend to take the following additional steps to mitigate the risk that the necessary 3TG in our in-scope products benefit armed groups in the DRC and its adjoining countries. These steps are in addition to the steps that we took in respect of 2018, which we intend to continue to take in respect of 2018 to the extent applicable.

5

Annex A

Capitalized terms used and not otherwise defined in this Annex have the meanings set forth in the Conflict Minerals Report of which this Annex is a part.

Smelters and Refiners

In connection with our reasonable country of origin inquiry or due diligence, as applicable, the Suppliers identified to us the smelters and refiners listed below as either being part of our supply chain or as potentially having processed the necessary 3TG contained in our in-scope products in 2018. Please see the notes that accompany the tables for additional information concerning the information in the tables.

Summary Smelter and Refiner Information

The following percentages of the identified smelters and refiners were listed as Conformant, by mineral: tantalum – 100%; tin – 90%; tungsten – 91%; and gold – 68%.

Smelter and Refiner Names and Status

A-1

A-2

A-3

A-4

A-5

A-6

A-7

A-8

We note the following in connection with the information contained in the foregoing tables:

Country of Origin Information

The identified countries of origin of the 3TG processed by the smelters and refiners listed in the table above may have included the countries below, based on publicly available information, our RCOI and due diligence and other information gathered by the Service Provider. These may not be all of the countries of origin from which the smelters and refiners listed above may have sourced 3TG.

Argentina, Australia, Austria, Benin, Bolivia (Plurinational State of), Brazil, Burkina Faso, Burundi, Cambodia, Canada, Chile, China, Colombia, Democratic Republic of the Congo, Ecuador, Eritrea, Ethiopia, France, Germany, Ghana, Guatemala, Guinea, Guyana, Honduras, India, Indonesia, Japan, Kazakhstan, Laos, Madagascar, Malaysia, Mali, Mexico, Mongolia, Mozambique, Myanmar, Namibia, Nicaragua, Nigeria, Panama, Peru, Portugal, Russian Federation, Rwanda, Senegal, Sierra Leone, South Africa, Spain, Thailand, Togo, Uganda, United Kingdom of Great Britain and Northern Ireland, United States of America, Uzbekistan, Viet Nam and Zimbabwe.

Alternatively, or in addition, some of the smelters and refiners may have sourced from recycled or scrap sources.

A-9