# EDGAR Filing Document

**Accession Number:** 0001227654
**File Stem:** 0001227654-25-000124
**Filing Date:** 2025-6
**Character Count:** 82526
**Document Hash:** 941be2b628f3508d674a39d4ee4bceb6
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001227654-25-000124.hdr.sgml**: 20250627

**ACCESSION NUMBER**: 0001227654-25-000124

**CONFORMED SUBMISSION TYPE**: SD

**PUBLIC DOCUMENT COUNT**: 13

**FILED AS OF DATE**: 20250627

**DATE AS OF CHANGE**: 20250627

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** COMPASS MINERALS INTERNATIONAL INC
- **CENTRAL INDEX KEY:** 0001227654
- **STANDARD INDUSTRIAL CLASSIFICATION:** MINING, QUARRYING OF NONMETALLIC MINERALS (NO FUELS) [1400]
- **ORGANIZATION NAME:** 01 Energy & Transportation
- **EIN:** 363972986
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 0930

**FILING VALUES:**
- **FORM TYPE:** SD
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-31921
- **FILM NUMBER:** 251086887

**BUSINESS ADDRESS:**
- **STREET 1:** 9900 W. 109TH STREET
- **STREET 2:** SUITE 100
- **CITY:** OVERLAND PARK
- **STATE:** KS
- **ZIP:** 66210
- **BUSINESS PHONE:** 913-344-9200

**MAIL ADDRESS:**
- **STREET 1:** 9900 W. 109TH STREET
- **STREET 2:** SUITE 100
- **CITY:** OVERLAND PARK
- **STATE:** KS
- **ZIP:** 66210

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** SALT HOLDINGS CORP
- **DATE OF NAME CHANGE:** 20030416

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**WASHINGTON, D.C. 20549**

**FORM SD** 

**SPECIALIZED DISCLOSURE REPORT**

**Compass Minerals International, Inc.** 

(Exact name of registrant as specified in its charter)

---

| | | |
|:---|:---|:---|
| **Delaware** | **001-31921** | **36-3972986** |
| (State or other jurisdiction of incorporation) | (Commission File Number) | (I.R.S. Employer Identification No.) |

---

**9900 West 109**<sup>th</sup> **Street** 

**Suite 100** 

**Overland Park, KS 66210** 

(Address of principal executive offices)

**Peter Fjellman**

**(913) 344-9200** 

(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 submitted, 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, _____.

☒&nbsp;&nbsp;&nbsp;&nbsp;Rule 13q-1 under the Securities Exchange Act (17 CFR 240.13q-1) for the fiscal year ended September 30, 2024.

------

**Section 1 - Conflict Minerals Disclosure**

**Item 1.01&nbsp;&nbsp;&nbsp;&nbsp;Conflict Minerals Disclosure and Report**

Not applicable.

**Item 1.02&nbsp;&nbsp;&nbsp;&nbsp;Exhibit**

Not applicable.

**Section 2 - Resource Extraction Issuer Disclosure**

**Item 2.01&nbsp;&nbsp;&nbsp;&nbsp;Resource Extraction Issuer Disclosure and Report**

***Disclosure of Payments by Resource Extraction Issuers***

The payment disclosure required by this Item 2.01 is included as Exhibit 2.01 to this Form SD.

***Report on payments to governments for the year ended September 30, 2024***

This report provides a consolidated overview of the payments to governments made by Compass Minerals International, Inc. ("CMI," the parent holding company) and its consolidated subsidiaries for the fiscal year ended September 30, 2024. Unless the context requires otherwise, references in this report to the "Company," "Compass Minerals," "CMP," "we," "us" and "our" refer to CMI and its consolidated subsidiaries collectively.

All payments are reported in U.S. dollars. Payments that were made in currencies other than in U.S. dollars have been converted to U.S. dollars using the exchange rates as of September 30, 2024.

***Our business segments***

Our business segments are strategic business units that offer different products and services, and each business requires different technology and marketing strategies. We have two business segments:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• *Salt Segment*: This segment produces and markets salt, consisting primarily of sodium chloride and magnesium chloride, for use in road deicing for winter roadway safety and for dust control, food processing, water softeners and other consumer, agricultural and industrial applications. As of September 30, 2024, the Salt Segment had eight production stage mining properties located in the United States, Canada and the United Kingdom and one exploration stage mining property located in Chile.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• *Plant Nutrition*: This segment produces and markets various grades of potash specialty fertilizer ("SOP"). As of September 30, 2024, the Plant Nutrition segment had one production stage mining property in the United States and one exploration stage mining property in Canada.

***Our projects***

This report discloses the payments made by us to governments for the commercial development of minerals, such as salt, SOP and magnesium chloride, and which involve the exploration, extraction, processing, and export of such minerals, or the acquisition of a license for any such activity.

As of September 30, 2024, we had eight production stage mining properties. Where the type of resource being commercially developed differed within a mining property, we have disclosed payments for the mining property as separate projects segregated by product type.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• *Cote Blanche Island*: extraction of rock salt, through underground mining, in the state of Louisiana, in the United States. We consider this mining property as one project.

------

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• *Lyons*: brine well-based extraction of mechanically-evaporated salt in the state of Kansas, in the United States. We consider this mining property as one project.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• *Ogden*: extraction of SOP, solar salt and magnesium chloride, through pumping of brine from the Great Salt Lake into solar evaporation ponds on the surface, which we identify as well mining for purposes of this Form SD, in the state of Utah, in the United States. The projects for this mining property include:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;◦ *Ogden – SOP:* extraction of SOP, through solar evaporation.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;◦ *Ogden – Solar Salt:* extraction of solar salt, through solar evaporation.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;◦ *Ogden – Magnesium Chloride*: extraction of magnesium chloride, through solar evaporation.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• *Amherst*: brine well-based extraction of mechanically-evaporated salt in the town of Amherst, in the province of Nova Scotia, in Canada. We consider this mining property as one project*.*

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• *Goderich Mine*: extraction of rock salt, through underground mining, in the town of Goderich, in the province of Ontario, in Canada. We consider this mining property as one project.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• *Goderich Plant*: brine well-based extraction of mechanically-evaporated salt in the town of Goderich, in the province of Ontario, in Canada. We consider this mining property as one project.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• *Unity*: brine well-based extraction of mechanically-evaporated salt in the town of Unity, in the province of Saskatchewan, in Canada. We consider this mining property as one project.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• *Winsford*: extraction of rock salt, through underground mining, in the town of Winsford, in the county of Cheshire, in the United Kingdom. We consider this mining property as one project.

As of September 30, 2024, we had two exploration stage mining properties in Wynyard, Saskatchewan, Canada and in the Chilean Atacama Desert. Pursuant to Item 2.01(b)(1) of Form SD, we are delaying disclosing payment information related to exploratory activities conducted at these two mining properties until our Form SD submitted for the fiscal year ending September 30, 2025, which is the fiscal year immediately following the fiscal year in which payments were made.

**Section 3 - Exhibits** 

**Item 3.01&nbsp;&nbsp;&nbsp;&nbsp;Exhibits**

The following exhibit is filed as part of this report.

---

| | |
|:---|:---|
| **Exhibit No.** | **Exhibit Description** |
| <u>[2.01](cmp-20240930.htm)</u> | <u>[Resource Extraction Payment Report](cmp-20240930.htm)</u> |

---

------

**SIGNATURES**

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

---

| | | |
|:---|:---|:---|
| | &nbsp;&nbsp;**COMPASS MINERALS INTERNATIONAL, INC.** | &nbsp;&nbsp;**COMPASS MINERALS INTERNATIONAL, INC.** |
| Date: June 27, 2025 | &nbsp;&nbsp;By: | /s/ Peter Fjellman |
|  |  | Name: Peter Fjellman |
|  |  | Title: Chief Financial Officer |

---

## Exhibit 2.01

**Exhibit 2.01**

**<u>Resource Extraction Payment Report</u>**

**Project-level disclosure**

The table below sets forth our payments made to governments for the fiscal year ended September 30, 2024, by project and type of payment.

---

| | | | | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|:---|:---|:---|
| | **For the year ended September 30, 2024**<br>***(U.S.$ thousand)***<sup>(1)</sup> | **For the year ended September 30, 2024**<br>***(U.S.$ thousand)***<sup>(1)</sup> | **For the year ended September 30, 2024**<br>***(U.S.$ thousand)***<sup>(1)</sup> | **For the year ended September 30, 2024**<br>***(U.S.$ thousand)***<sup>(1)</sup> | **For the year ended September 30, 2024**<br>***(U.S.$ thousand)***<sup>(1)</sup> | **For the year ended September 30, 2024**<br>***(U.S.$ thousand)***<sup>(1)</sup> | **For the year ended September 30, 2024**<br>***(U.S.$ thousand)***<sup>(1)</sup> | **For the year ended September 30, 2024**<br>***(U.S.$ thousand)***<sup>(1)</sup> | **For the year ended September 30, 2024**<br>***(U.S.$ thousand)***<sup>(1)</sup> | **For the year ended September 30, 2024**<br>***(U.S.$ thousand)***<sup>(1)</sup> |
| | **Taxes** | **Taxes** | **Royalties** | **Fees** | **Production <br>Entitlements** | **Bonuses** | **Dividends** | **Payments for <br>infrastructure <br>improvements** | **Community and social responsibility <br>payments** | **Total** |
| **United States** | | | | | | | | | | |
| Compass Minerals International, Inc. | 9644 | (2) |  |  |  |  |  |  |  | **9644** |
| Cote Blanche Island |  |  |  |  |  |  |  |  |  | **—** |
| Lyons |  |  |  |  |  |  |  |  |  | **—** |
| Ogden – SOP |  |  |  |  |  |  |  |  |  | **—** |
| Ogden – Solar Salt |  |  |  |  |  |  |  |  |  | **—** |
| Ogden – Magnesium Chloride |  |  |  |  |  |  |  |  |  | **—** |
| **Canada** |  |  |  |  |  |  |  |  |  |  |
| Compass Minerals Canada Corp. | 18669 | (3) | 4982 |  |  |  |  |  |  | **23651** |
| Amherst |  |  |  |  |  |  |  |  |  |  |
| Goderich Mine | 245 | (4) |  |  |  |  |  |  |  | **245** |
| Goderich Plant | 62 | (5) |  |  |  |  |  |  |  | **62** |
| Unity | 101 | (6) | 118 |  |  |  |  |  |  | **219** |
| **United Kingdom** |  |  |  |  |  |  |  |  |  |  |
| Winsford | 249 | (7) |  |  |  |  |  |  |  | **249** |
| **Total** | **28970** |  | **5100** | **—** | **—** | **—** | **—** | **—** | **—** | **34070** |

---

(1)All payments are reported in U.S. dollars. Payments relating to projects in Canada were made in Canadian dollars and payments relating to the project in the United Kingdom were made in British pound sterling. Such payments made in currencies other than in U.S. dollars have been converted to U.S. dollars using the exchange rates as of September 30, 2024.

(2)Compass Minerals International, Inc. (the "Company") files a consolidated income tax return in the U.S., which includes all U.S. entities including the projects listed. The U.S. Federal Government levies corporate income taxes at the consolidated group level rather than on a per-project basis. Accordingly, the Company has disclosed payments of taxes at the U.S. consolidated group level. The payments relate not to particular projects but to the consolidated U.S. income of the Company. The reported amount represents $9,446 thousand of Federal income taxes paid to the U.S Federal Government and $198 thousand of withholding taxes paid to the Government of Brazil on behalf of the Company for interest paid to the Company by its Brazilian subsidiary.

(3)Compass Minerals Canada Corp. files a consolidated income tax return. The Government of Canada levies corporate income taxes at the entity level rather than on a per-project basis. The reported amount represents $17,261 thousand of income taxes on entity-level profits paid to the Canada Revenue Agency and $1,001 thousand of provincial-level income taxes on entity-level profits paid to the Province of Quebec.

(4)Represents property taxes paid to the Town of Goderich attributable to Goderich Mine.

(5)Represents property taxes paid to the Town of Goderich attributable to Goderich Plant.

------

(6)Represents property taxes.

(7)Includes $774 thousand in income taxes paid in fiscal year 2024 netted against income tax refunds of $979 thousand received in fiscal year 2024, and $454 thousand in property taxes.

------

**Government-level disclosure**

The table below sets forth our payments made to governments for the fiscal year ended September 30, 2024, by government and type of payment.

---

| | | | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|:---|:---|
| | **For the year ended September 30, 2024**<br>***(U.S.$ thousand)***<sup>(1)</sup> | **For the year ended September 30, 2024**<br>***(U.S.$ thousand)***<sup>(1)</sup> | **For the year ended September 30, 2024**<br>***(U.S.$ thousand)***<sup>(1)</sup> | **For the year ended September 30, 2024**<br>***(U.S.$ thousand)***<sup>(1)</sup> | **For the year ended September 30, 2024**<br>***(U.S.$ thousand)***<sup>(1)</sup> | **For the year ended September 30, 2024**<br>***(U.S.$ thousand)***<sup>(1)</sup> | **For the year ended September 30, 2024**<br>***(U.S.$ thousand)***<sup>(1)</sup> | **For the year ended September 30, 2024**<br>***(U.S.$ thousand)***<sup>(1)</sup> | **For the year ended September 30, 2024**<br>***(U.S.$ thousand)***<sup>(1)</sup> |
| | **Taxes** | **Royalties** | **Fees** | **Production <br>Entitlements** | **Bonuses** | **Dividends** | **Payments for <br>infrastructure <br>improvements** | **Community and social responsibility <br>payments** | **Total** |
| **United States** | | | | | | | | | |
| U.S. Federal Government | 9446 |  |  |  |  |  |  |  | **9446** |
| **Brazil** |  |  |  |  |  |  |  |  |  |
| Government of Brazil | 198 |  |  |  |  |  |  |  | **198** |
| **Canada** |  |  |  |  |  |  |  |  |  |
| Government of Canada | 17261 |  |  |  |  |  |  |  | **17261** |
| Government of Ontario | 407 | 4982 |  |  |  |  |  |  | **5389** |
| Government of Saskatchewan |  | 118 |  |  |  |  |  |  | **118** |
| Government of Quebec | 1001 |  |  |  |  |  |  |  | **1001** |
| Rural Municipality of Round Valley No. 410 | 101 |  |  |  |  |  |  |  | **101** |
| Town of Goderich | 307 |  |  |  |  |  |  |  | **307** |
| **United Kingdom** |  |  |  |  |  |  |  |  |  |
| Government of the United Kingdom | (205) |  |  |  |  |  |  |  | **(205)** |
| Cheshire | 454 |  |  |  |  |  |  |  | **454** |
| **Total** | **28970** | **5100** | **—** | **—** | **—** | **—** | **—** | **—** | **34070** |

---

(1)All payments are reported in U.S. dollars. Payments relating to projects in Canada were made in Canadian dollars and payments relating to the project in the United Kingdom were made in British pound sterling. Such payments made in currencies other than in U.S. dollars have been converted to U.S. dollars using the exchange rates as of September 30, 2024.

------

**Payment details disclosure**

The table below provides the details of payments made to governments for the fiscal year ended September 30, 2024.

---

| | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|
| **For the year ended September 30, 2024** | **For the year ended September 30, 2024** | **For the year ended September 30, 2024** | **For the year ended September 30, 2024** | **For the year ended September 30, 2024** | **For the year ended September 30, 2024** | **For the year ended September 30, 2024** |
| **Subnational Jurisdiction** | **Government** | **Business segment** | **Project** | **Resource** | **Extraction Method** | **Amount** <br>***(U.S.$ thousand)***<sup>(1)</sup> |
| **United States** | | | | | | |
| U.S. Federal Government | U.S. Federal Government | All | Compass Minerals International, Inc. (U.S. consolidated group level)<sup>(2)</sup> | N/A | N/A | 9446 |
| Louisiana | U.S. Federal Government | Salt | Cote Blanche Island | Rock Salt | Underground Mining |  |
| Kansas | U.S. Federal Government | Salt | Lyons | Mechanically-Evaporated Salt | Well |  |
| Utah | U.S. Federal Government | Plant Nutrition | Ogden – SOP | SOP | Well |  |
| Utah | U.S. Federal Government | Salt | Ogden – Solar Salt | Solar Salt | Well |  |
| Utah | U.S. Federal Government | Salt | Ogden – Magnesium Chloride | Magnesium Chloride | Well |  |
| **Total** | **Total** | **Total** | **Total** | **Total** | **Total** | **9446** |
| **Brazil** |  |  |  |  |  |  |
| Government of Brazil | Government of Brazil | Plant Nutrition | N/A | N/A | N/A | 198 |
| **Total** | **Total** | **Total** | **Total** | **Total** | **Total** | **198** |
| **Canada** |  |  |  |  |  |  |
| Government of Canada | Government of Canada | Salt | N/A<sup>(3)</sup> | N/A | N/A | 17261 |
| Quebec | Quebec | Salt | N/A<sup>(4)</sup> | N/A | N/A | 1001 |
| Ontario | Government of Ontario | Salt | Goderich Mine | Rock Salt | Underground Mining | 5389 |
| Ontario | Town of Goderich | Salt | Goderich Mine | Rock Salt | Underground Mining | 245 |
| Ontario | Town of Goderich | Salt | Goderich Plant | Mechanically-Evaporated Salt | Well | 62 |
| Saskatchewan | Rural Municipality of Round Valley No. 410 | Salt | Unity | Mechanically-Evaporated Salt | Well | 101 |
| Saskatchewan | Rural Saskatchewan | Salt | Unity | Mechanically-Evaporated Salt | Well | 118 |
| **Total** | **Total** | **Total** | **Total** | **Total** | **Total** | **24177** |
| **United Kingdom** |  |  |  |  |  |  |
| United Kingdom | United Kingdom | Salt | Winsford<sup>(5)</sup> | Rock Salt | Underground Mining | (205) |
| Cheshire | Cheshire | Salt | Winsford | Rock Salt | Underground Mining | 454 |
| **Total** | **Total** | **Total** | **Total** | **Total** | **Total** | **249** |

---

(1)All payments are reported in U.S. dollars. Payments relating to projects in Canada were made in Canadian dollars and payments relating to the project in the United Kingdom were made in British pound sterling. Such payments made in currencies other than in U.S. dollars have been converted to U.S. dollars using the exchange rates as of September 30, 2024.

(2)The Company files a consolidated income tax return in the U.S. The U.S. Federal Government levies corporate income taxes at the consolidated group level rather than on a per-project basis. Accordingly, the Company has disclosed payments of taxes at the U.S. consolidated group level. The payments relate not to particular projects but to the consolidated U.S. income of the Company.

(3)Compass Minerals Canada Corp. files a consolidated income tax return. The Government of Canada levies corporate income taxes at the entity level rather than on a per-project basis.

(4)Compass Minerals Canada Corp. files a consolidated income tax return. The Government of Quebec levies corporate income taxes at the entity level rather than on a per-project basis.

(5)The reported amount represents income taxes paid of $774 thousand in fiscal year 2024 netted against income tax refunds of $979 thousand received in fiscal 2024.

## Exhibit 2.01

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Compass Minerals International, Inc. (the "Company") files a consolidated income tax return in the U.S., which includes all U.S. entities including the projects listed. The U.S. Federal Government levies corporate income taxes at the consolidated group level rather than on a per-project basis. Accordingly, the Company has disclosed payments of taxes at the U.S. consolidated group level. The payments relate not to particular projects but to the consolidated U.S. income of the Company. The reported amount represents $9,446 thousand o f Federal income taxes paid to the U.S Federal Government and $198 thousand of withholding taxes paid to the Government of Brazil on behalf of the Company for interest paid to the Company by its Brazilian subsidiary.

Compass Minerals Canada Corp. files a consolidated income tax return. The Government of Canada levies corporate income taxes at the entity level rather than on a per-project basis. The reported amount represents $17,261 thousand of income taxes on entity-level profits paid to the Canada Revenue Agency and $1,001 thousand of provincial-level income taxes on entity-level profits paid to the Province of Quebec.

Represents property taxes paid to the Town of Goderich attributable to Goderich Mine.

Represents property taxes paid to the Town of Goderich attributable to Goderich Plant.

Represents property taxes.

Includes $774 thousand in income taxes paid in fiscal year 2024 netted against income tax refunds of $979 thousand received in fiscal year 2024, and $454 thousand in property taxes.

## Exhibit 2.01

```

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          <link:loc xlink:type="locator" xlink:label="loc_cmp_GovernmentOfTheUnitedKingdomMember_68c1e4e7-5845-4982-93a9-7e2997b5cf32" xlink:href="cmp-20240930.xsd#cmp_GovernmentOfTheUnitedKingdomMember"/>
          <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rxp_AllGovernmentsMember" xlink:to="loc_cmp_GovernmentOfTheUnitedKingdomMember_68c1e4e7-5845-4982-93a9-7e2997b5cf32" xlink:type="arc" order="9"/>
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        <link:roleRef roleURI="http://xbrl.sec.gov/rxp/role/ResourcesOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/rxp/2025/rxp-2025.xsd#ResourcesOnly"/>
        <link:definitionLink xlink:role="http://xbrl.sec.gov/rxp/role/ResourcesOnly" xlink:type="extended">
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          <link:loc xlink:type="locator" xlink:label="loc_cmp_SaltSOPMagnesiumChlorideMember_34f4c65f-db23-4b01-9f0a-ac61ac7b8db8" xlink:href="cmp-20240930.xsd#cmp_SaltSOPMagnesiumChlorideMember"/>
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          <link:loc xlink:type="locator" xlink:label="loc_cmp_SolarSaltMember_d6540bbd-edab-44a6-9d96-d347e900f381" xlink:href="cmp-20240930.xsd#cmp_SolarSaltMember"/>
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          <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rxp_AllResourcesMember" xlink:to="loc_cmp_MechanicallyEvaporatedSaltRockSaltMember_e3751ed9-e7d1-4967-b113-19dc81cb0d15" xlink:type="arc" order="7"/>
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        <link:roleRef roleURI="http://xbrl.sec.gov/rxp/role/SegmentsOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/rxp/2025/rxp-2025.xsd#SegmentsOnly"/>
        <link:definitionLink xlink:role="http://xbrl.sec.gov/rxp/role/SegmentsOnly" xlink:type="extended">
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          <link:loc xlink:type="locator" xlink:label="loc_cmp_SaltSegmentMember_274be9a8-a514-4ff9-8f2d-505aa17f02be" xlink:href="cmp-20240930.xsd#cmp_SaltSegmentMember"/>
          <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rxp_AllSegmentsMember" xlink:to="loc_cmp_SaltSegmentMember_274be9a8-a514-4ff9-8f2d-505aa17f02be" xlink:type="arc" order="1"/>
          <link:loc xlink:type="locator" xlink:label="loc_cmp_PlantNutritionSegmentMember_3c5264b0-3aab-4e5b-8929-bdf3888a7949" xlink:href="cmp-20240930.xsd#cmp_PlantNutritionSegmentMember"/>
          <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_rxp_AllSegmentsMember" xlink:to="loc_cmp_PlantNutritionSegmentMember_3c5264b0-3aab-4e5b-8929-bdf3888a7949" xlink:type="arc" order="2"/>
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        <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodStartLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodStartLabel"/>
        <link:roleRef roleURI="http://www.xbrl.org/2009/role/netLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd#netLabel"/>
        <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedNetLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedNetLabel"/>
        <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTerseLabel"/>
        <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodEndLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodEndLabel"/>
        <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedLabel"/>
        <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTotalLabel"/>
        <link:labelLink xlink:role="http://www.xbrl.org/2003/role/link" xlink:type="extended">
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          <link:loc xlink:type="locator" xlink:label="loc_cmp_U.S.FederalGovernmentMember" xlink:href="cmp-20240930.xsd#cmp_U.S.FederalGovernmentMember"/>
          <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cmp_U.S.FederalGovernmentMember" xlink:to="lab_cmp_U.S.FederalGovernmentMember" xlink:type="arc" order="1"/>
          <link:label id="lab_cmp_OgdenSolarSaltMember_label_en-US" xlink:label="lab_cmp_OgdenSolarSaltMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Ogden - Solar Salt [Member]</link:label>
          <link:loc xlink:type="locator" xlink:label="loc_cmp_OgdenSolarSaltMember" xlink:href="cmp-20240930.xsd#cmp_OgdenSolarSaltMember"/>
          <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cmp_OgdenSolarSaltMember" xlink:to="lab_cmp_OgdenSolarSaltMember" xlink:type="arc" order="1"/>
          <link:label id="lab_cmp_OgdenMagnesiumChlorideMember_label_en-US" xlink:label="lab_cmp_OgdenMagnesiumChlorideMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Ogden – Magnesium Chloride [Member]</link:label>
          <link:loc xlink:type="locator" xlink:label="loc_cmp_OgdenMagnesiumChlorideMember" xlink:href="cmp-20240930.xsd#cmp_OgdenMagnesiumChlorideMember"/>
          <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cmp_OgdenMagnesiumChlorideMember" xlink:to="lab_cmp_OgdenMagnesiumChlorideMember" xlink:type="arc" order="1"/>
          <link:label id="lab_cmp_OgdenSOPMember_label_en-US" xlink:label="lab_cmp_OgdenSOPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Ogden - SOP [Member]</link:label>
          <link:loc xlink:type="locator" xlink:label="loc_cmp_OgdenSOPMember" xlink:href="cmp-20240930.xsd#cmp_OgdenSOPMember"/>
          <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cmp_OgdenSOPMember" xlink:to="lab_cmp_OgdenSOPMember" xlink:type="arc" order="1"/>
          <link:label id="lab_cmp_UnityMember_label_en-US" xlink:label="lab_cmp_UnityMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Unity [Member]</link:label>
          <link:loc xlink:type="locator" xlink:label="loc_cmp_UnityMember" xlink:href="cmp-20240930.xsd#cmp_UnityMember"/>
          <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cmp_UnityMember" xlink:to="lab_cmp_UnityMember" xlink:type="arc" order="1"/>
          <link:label id="lab_cmp_LyonsMember_label_en-US" xlink:label="lab_cmp_LyonsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Lyons [Member]</link:label>
          <link:loc xlink:type="locator" xlink:label="loc_cmp_LyonsMember" xlink:href="cmp-20240930.xsd#cmp_LyonsMember"/>
          <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cmp_LyonsMember" xlink:to="lab_cmp_LyonsMember" xlink:type="arc" order="1"/>
          <link:label id="lab_cmp_GovernmentOfTheUnitedKingdomMember_label_en-US" xlink:label="lab_cmp_GovernmentOfTheUnitedKingdomMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Government of the United Kingdom [Member]</link:label>
          <link:loc xlink:type="locator" xlink:label="loc_cmp_GovernmentOfTheUnitedKingdomMember" xlink:href="cmp-20240930.xsd#cmp_GovernmentOfTheUnitedKingdomMember"/>
          <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cmp_GovernmentOfTheUnitedKingdomMember" xlink:to="lab_cmp_GovernmentOfTheUnitedKingdomMember" xlink:type="arc" order="1"/>
          <link:label id="lab_cmp_CompassMineralsCanadaCorp.Member_label_en-US" xlink:label="lab_cmp_CompassMineralsCanadaCorp.Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Compass Minerals Canada Corp. [Member]</link:label>
          <link:loc xlink:type="locator" xlink:label="loc_cmp_CompassMineralsCanadaCorp.Member" xlink:href="cmp-20240930.xsd#cmp_CompassMineralsCanadaCorp.Member"/>
          <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cmp_CompassMineralsCanadaCorp.Member" xlink:to="lab_cmp_CompassMineralsCanadaCorp.Member" xlink:type="arc" order="1"/>
          <link:label id="lab_cmp_CoteBlancheIslandMember_label_en-US" xlink:label="lab_cmp_CoteBlancheIslandMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cote Blanche Island [Member]</link:label>
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          <link:loc xlink:type="locator" xlink:label="loc_cmp_RuralMunicipalityOfRoundValleyNo.410Member" xlink:href="cmp-20240930.xsd#cmp_RuralMunicipalityOfRoundValleyNo.410Member"/>
          <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cmp_RuralMunicipalityOfRoundValleyNo.410Member" xlink:to="lab_cmp_RuralMunicipalityOfRoundValleyNo.410Member" xlink:type="arc" order="1"/>
          <link:label id="lab_cmp_GovernmentOfBrazilMember_label_en-US" xlink:label="lab_cmp_GovernmentOfBrazilMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Government Of Brazil [Member]</link:label>
          <link:loc xlink:type="locator" xlink:label="loc_cmp_GovernmentOfBrazilMember" xlink:href="cmp-20240930.xsd#cmp_GovernmentOfBrazilMember"/>
          <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cmp_GovernmentOfBrazilMember" xlink:to="lab_cmp_GovernmentOfBrazilMember" xlink:type="arc" order="1"/>
          <link:label id="lab_country_BR_label_en-US" xlink:label="lab_country_BR" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">BRAZIL</link:label>
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          <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_country_BR" xlink:to="lab_country_BR" xlink:type="arc" order="1"/>
          <link:label id="lab_country_GB_label_en-US" xlink:label="lab_country_GB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">UNITED KINGDOM</link:label>
          <link:loc xlink:type="locator" xlink:label="loc_country_GB" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_GB"/>
          <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_country_GB" xlink:to="lab_country_GB" xlink:type="arc" order="1"/>
          <link:label id="lab_cmp_GoderichMineMember_label_en-US" xlink:label="lab_cmp_GoderichMineMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Goderich Mine [Member]</link:label>
          <link:loc xlink:type="locator" xlink:label="loc_cmp_GoderichMineMember" xlink:href="cmp-20240930.xsd#cmp_GoderichMineMember"/>
          <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cmp_GoderichMineMember" xlink:to="lab_cmp_GoderichMineMember" xlink:type="arc" order="1"/>
          <link:label id="lab_cmp_GovernmentOfSaskatchewanMember_label_en-US" xlink:label="lab_cmp_GovernmentOfSaskatchewanMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Government of Saskatchewan [Member]</link:label>
          <link:loc xlink:type="locator" xlink:label="loc_cmp_GovernmentOfSaskatchewanMember" xlink:href="cmp-20240930.xsd#cmp_GovernmentOfSaskatchewanMember"/>
          <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cmp_GovernmentOfSaskatchewanMember" xlink:to="lab_cmp_GovernmentOfSaskatchewanMember" xlink:type="arc" order="1"/>
          <link:label id="lab_cmp_GovernmentOfOntarioMember_label_en-US" xlink:label="lab_cmp_GovernmentOfOntarioMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Government of Ontario [Member]</link:label>
          <link:loc xlink:type="locator" xlink:label="loc_cmp_GovernmentOfOntarioMember" xlink:href="cmp-20240930.xsd#cmp_GovernmentOfOntarioMember"/>
          <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cmp_GovernmentOfOntarioMember" xlink:to="lab_cmp_GovernmentOfOntarioMember" xlink:type="arc" order="1"/>
          <link:label id="lab_country_CA_label_en-US" xlink:label="lab_country_CA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">CANADA</link:label>
          <link:loc xlink:type="locator" xlink:label="loc_country_CA" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_CA"/>
          <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_country_CA" xlink:to="lab_country_CA" xlink:type="arc" order="1"/>
          <link:label id="lab_country_US_label_en-US" xlink:label="lab_country_US" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">UNITED STATES</link:label>
          <link:loc xlink:type="locator" xlink:label="loc_country_US" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_US"/>
          <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_country_US" xlink:to="lab_country_US" xlink:type="arc" order="1"/>
          <link:label id="lab_cmp_CompassMineralsInternationalInc.USMember_label_en-US" xlink:label="lab_cmp_CompassMineralsInternationalInc.USMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Compass Minerals International, Inc. (US) [Member]</link:label>
          <link:loc xlink:type="locator" xlink:label="loc_cmp_CompassMineralsInternationalInc.USMember" xlink:href="cmp-20240930.xsd#cmp_CompassMineralsInternationalInc.USMember"/>
          <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cmp_CompassMineralsInternationalInc.USMember" xlink:to="lab_cmp_CompassMineralsInternationalInc.USMember" xlink:type="arc" order="1"/>
          <link:label id="lab_cmp_WinsfordMember_label_en-US" xlink:label="lab_cmp_WinsfordMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Winsford [Member]</link:label>
          <link:loc xlink:type="locator" xlink:label="loc_cmp_WinsfordMember" xlink:href="cmp-20240930.xsd#cmp_WinsfordMember"/>
          <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cmp_WinsfordMember" xlink:to="lab_cmp_WinsfordMember" xlink:type="arc" order="1"/>
          <link:label id="lab_cmp_GovernmentOfQuebecMember_label_en-US" xlink:label="lab_cmp_GovernmentOfQuebecMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Government of Quebec [Member]</link:label>
          <link:loc xlink:type="locator" xlink:label="loc_cmp_GovernmentOfQuebecMember" xlink:href="cmp-20240930.xsd#cmp_GovernmentOfQuebecMember"/>
          <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cmp_GovernmentOfQuebecMember" xlink:to="lab_cmp_GovernmentOfQuebecMember" xlink:type="arc" order="1"/>
          <link:label id="lab_cmp_TownOfGoderichMember_label_en-US" xlink:label="lab_cmp_TownOfGoderichMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Town of Goderich [Member]</link:label>
          <link:loc xlink:type="locator" xlink:label="loc_cmp_TownOfGoderichMember" xlink:href="cmp-20240930.xsd#cmp_TownOfGoderichMember"/>
          <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cmp_TownOfGoderichMember" xlink:to="lab_cmp_TownOfGoderichMember" xlink:type="arc" order="1"/>
          <link:label id="lab_cmp_GovernmentOfCanadaMember_label_en-US" xlink:label="lab_cmp_GovernmentOfCanadaMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Government of Canada [Member]</link:label>
          <link:loc xlink:type="locator" xlink:label="loc_cmp_GovernmentOfCanadaMember" xlink:href="cmp-20240930.xsd#cmp_GovernmentOfCanadaMember"/>
          <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cmp_GovernmentOfCanadaMember" xlink:to="lab_cmp_GovernmentOfCanadaMember" xlink:type="arc" order="1"/>
          <link:label id="lab_cmp_GoderichPlantMember_label_en-US" xlink:label="lab_cmp_GoderichPlantMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Goderich Plant [Member]</link:label>
          <link:loc xlink:type="locator" xlink:label="loc_cmp_GoderichPlantMember" xlink:href="cmp-20240930.xsd#cmp_GoderichPlantMember"/>
          <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cmp_GoderichPlantMember" xlink:to="lab_cmp_GoderichPlantMember" xlink:type="arc" order="1"/>
          <link:label id="lab_cmp_CheshireMember_label_en-US" xlink:label="lab_cmp_CheshireMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cheshire [Member]</link:label>
          <link:loc xlink:type="locator" xlink:label="loc_cmp_CheshireMember" xlink:href="cmp-20240930.xsd#cmp_CheshireMember"/>
          <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cmp_CheshireMember" xlink:to="lab_cmp_CheshireMember" xlink:type="arc" order="1"/>
          <link:label id="lab_cmp_SaltSOPMagnesiumChlorideMember_label_en-US" xlink:label="lab_cmp_SaltSOPMagnesiumChlorideMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Salt, SOP, Magnesium Chloride [Member]</link:label>
          <link:loc xlink:type="locator" xlink:label="loc_cmp_SaltSOPMagnesiumChlorideMember" xlink:href="cmp-20240930.xsd#cmp_SaltSOPMagnesiumChlorideMember"/>
          <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cmp_SaltSOPMagnesiumChlorideMember" xlink:to="lab_cmp_SaltSOPMagnesiumChlorideMember" xlink:type="arc" order="1"/>
          <link:label id="lab_cmp_RockSaltMember_label_en-US" xlink:label="lab_cmp_RockSaltMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Rock Salt [Member]</link:label>
          <link:loc xlink:type="locator" xlink:label="loc_cmp_RockSaltMember" xlink:href="cmp-20240930.xsd#cmp_RockSaltMember"/>
          <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cmp_RockSaltMember" xlink:to="lab_cmp_RockSaltMember" xlink:type="arc" order="1"/>
          <link:label id="lab_cmp_SaltSegmentMember_label_en-US" xlink:label="lab_cmp_SaltSegmentMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Salt Segment [Member]</link:label>
          <link:loc xlink:type="locator" xlink:label="loc_cmp_SaltSegmentMember" xlink:href="cmp-20240930.xsd#cmp_SaltSegmentMember"/>
          <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cmp_SaltSegmentMember" xlink:to="lab_cmp_SaltSegmentMember" xlink:type="arc" order="1"/>
          <link:label id="lab_cmp_MechanicallyEvaporatedSaltMember_label_en-US" xlink:label="lab_cmp_MechanicallyEvaporatedSaltMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Mechanically-Evaporated Salt [Member]</link:label>
          <link:loc xlink:type="locator" xlink:label="loc_cmp_MechanicallyEvaporatedSaltMember" xlink:href="cmp-20240930.xsd#cmp_MechanicallyEvaporatedSaltMember"/>
          <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cmp_MechanicallyEvaporatedSaltMember" xlink:to="lab_cmp_MechanicallyEvaporatedSaltMember" xlink:type="arc" order="1"/>
          <link:label id="lab_cmp_SOPMember_label_en-US" xlink:label="lab_cmp_SOPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">SOP [Member]</link:label>
          <link:loc xlink:type="locator" xlink:label="loc_cmp_SOPMember" xlink:href="cmp-20240930.xsd#cmp_SOPMember"/>
          <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cmp_SOPMember" xlink:to="lab_cmp_SOPMember" xlink:type="arc" order="1"/>
          <link:label id="lab_cmp_PlantNutritionSegmentMember_label_en-US" xlink:label="lab_cmp_PlantNutritionSegmentMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Plant Nutrition Segment [Member]</link:label>
          <link:loc xlink:type="locator" xlink:label="loc_cmp_PlantNutritionSegmentMember" xlink:href="cmp-20240930.xsd#cmp_PlantNutritionSegmentMember"/>
          <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cmp_PlantNutritionSegmentMember" xlink:to="lab_cmp_PlantNutritionSegmentMember" xlink:type="arc" order="1"/>
          <link:label id="lab_cmp_SolarSaltMember_label_en-US" xlink:label="lab_cmp_SolarSaltMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Solar Salt [Member]</link:label>
          <link:loc xlink:type="locator" xlink:label="loc_cmp_SolarSaltMember" xlink:href="cmp-20240930.xsd#cmp_SolarSaltMember"/>
          <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cmp_SolarSaltMember" xlink:to="lab_cmp_SolarSaltMember" xlink:type="arc" order="1"/>
          <link:label id="lab_cmp_MagnesiumChlorideMember_label_en-US" xlink:label="lab_cmp_MagnesiumChlorideMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Magnesium Chloride [Member]</link:label>
          <link:loc xlink:type="locator" xlink:label="loc_cmp_MagnesiumChlorideMember" xlink:href="cmp-20240930.xsd#cmp_MagnesiumChlorideMember"/>
          <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cmp_MagnesiumChlorideMember" xlink:to="lab_cmp_MagnesiumChlorideMember" xlink:type="arc" order="1"/>
          <link:label id="lab_cmp_MechanicallyEvaporatedSaltRockSaltMember_label_en-US" xlink:label="lab_cmp_MechanicallyEvaporatedSaltRockSaltMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Mechanically-Evaporated Salt, Rock Salt [Member]</link:label>
          <link:loc xlink:type="locator" xlink:label="loc_cmp_MechanicallyEvaporatedSaltRockSaltMember" xlink:href="cmp-20240930.xsd#cmp_MechanicallyEvaporatedSaltRockSaltMember"/>
          <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cmp_MechanicallyEvaporatedSaltRockSaltMember" xlink:to="lab_cmp_MechanicallyEvaporatedSaltRockSaltMember" xlink:type="arc" order="1"/>
        </link:labelLink>
      </link:linkbase>
    </xs:appinfo>
  </xs:annotation>
  <xs:element id="cmp_CompassMineralsInternationalInc.USMember" abstract="true" name="CompassMineralsInternationalInc.USMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cmp_CoteBlancheIslandMember" abstract="true" name="CoteBlancheIslandMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cmp_LyonsMember" abstract="true" name="LyonsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cmp_OgdenSOPMember" abstract="true" name="OgdenSOPMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cmp_OgdenSolarSaltMember" abstract="true" name="OgdenSolarSaltMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cmp_OgdenMagnesiumChlorideMember" abstract="true" name="OgdenMagnesiumChlorideMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cmp_CompassMineralsCanadaCorp.Member" abstract="true" name="CompassMineralsCanadaCorp.Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cmp_GoderichMineMember" abstract="true" name="GoderichMineMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cmp_GoderichPlantMember" abstract="true" name="GoderichPlantMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cmp_UnityMember" abstract="true" name="UnityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cmp_WinsfordMember" abstract="true" name="WinsfordMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cmp_U.S.FederalGovernmentMember" abstract="true" name="U.S.FederalGovernmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cmp_GovernmentOfBrazilMember" abstract="true" name="GovernmentOfBrazilMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cmp_GovernmentOfCanadaMember" abstract="true" name="GovernmentOfCanadaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cmp_GovernmentOfOntarioMember" abstract="true" name="GovernmentOfOntarioMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cmp_GovernmentOfSaskatchewanMember" abstract="true" name="GovernmentOfSaskatchewanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cmp_GovernmentOfQuebecMember" abstract="true" name="GovernmentOfQuebecMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cmp_RuralMunicipalityOfRoundValleyNo.410Member" abstract="true" name="RuralMunicipalityOfRoundValleyNo.410Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cmp_TownOfGoderichMember" abstract="true" name="TownOfGoderichMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cmp_GovernmentOfTheUnitedKingdomMember" abstract="true" name="GovernmentOfTheUnitedKingdomMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cmp_CheshireMember" abstract="true" name="CheshireMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cmp_SaltSOPMagnesiumChlorideMember" abstract="true" name="SaltSOPMagnesiumChlorideMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cmp_RockSaltMember" abstract="true" name="RockSaltMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cmp_SaltSegmentMember" abstract="true" name="SaltSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cmp_MechanicallyEvaporatedSaltMember" abstract="true" name="MechanicallyEvaporatedSaltMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cmp_SOPMember" abstract="true" name="SOPMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cmp_PlantNutritionSegmentMember" abstract="true" name="PlantNutritionSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cmp_SolarSaltMember" abstract="true" name="SolarSaltMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cmp_MagnesiumChlorideMember" abstract="true" name="MagnesiumChlorideMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cmp_MechanicallyEvaporatedSaltRockSaltMember" abstract="true" name="MechanicallyEvaporatedSaltRockSaltMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
</XBRL>

```