# EDGAR Filing Document

**Accession Number:** 0001227654
**File Stem:** 0001308179-26-000020
**Filing Date:** 2026-1
**Character Count:** 8512
**Document Hash:** 6e2af8a3f4f9bc8b3514f7b6e875ea5f
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001308179-26-000020.hdr.sgml**: 20260123

**ACCESSION NUMBER**: 0001308179-26-000020

**CONFORMED SUBMISSION TYPE**: DEFA14A

**PUBLIC DOCUMENT COUNT**: 8

**FILED AS OF DATE**: 20260123

**DATE AS OF CHANGE**: 20260123

**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:** DEFA14A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-31921
- **FILM NUMBER:** 26556616

**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<br>SECURITIES AND EXCHANGE COMMISSION<br>Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of the <br>Securities Exchange Act of 1934 (Amendment No.)

☑ Filed by the Registrant ☐ Filed by a party other than the Registrant

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| | |
|:---|:---|
| CHECK THE APPROPRIATE BOX: | CHECK THE APPROPRIATE BOX: |
| ☐ | Preliminary Proxy Statement |
| ☐ | Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) |
| ☐ | Definitive Proxy Statement |
| ☑ | Definitive Additional Materials |
| ☐ | Soliciting Material under §240.14a-12 |

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![](logo.jpg)

**Compass Minerals International, Inc.**

(Name of Registrant as Specified In Its Charter)<br>(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

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| | |
|:---|:---|
| PAYMENT OF FILING FEE (CHECK ALL BOXES THAT APPLY): | PAYMENT OF FILING FEE (CHECK ALL BOXES THAT APPLY): |
| ☑ | No fee required |
| ☐ | Fee paid previously with preliminary materials |
| ☐ | Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11 |

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| | |
|:---|:---|
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;![](logo.jpg)<br> COMPASS MINERALS INTERNATIONAL, INC.<br> 9900 WEST 109TH ST., SUITE 100<br> OVERLAND PARK, KS 66210  | Your **Vote** Counts!<br> **COMPASS MINERALS INTERNATIONAL, INC.**<br> 2026 Annual Meeting<br> Vote by March 4, 2026 11:59 PM ET. For shares held in a <br>Plan, vote by March 3, 2026 11:59 PM ET.<br> ![](cmp014557_defa14ax1x1.jpg) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;![](logo.jpg)<br> COMPASS MINERALS INTERNATIONAL, INC.<br> 9900 WEST 109TH ST., SUITE 100<br> OVERLAND PARK, KS 66210  | Your **Vote** Counts!<br> **COMPASS MINERALS INTERNATIONAL, INC.**<br> 2026 Annual Meeting<br> Vote by March 4, 2026 11:59 PM ET. For shares held in a <br>Plan, vote by March 3, 2026 11:59 PM ET.<br> ![](cmp014557_defa14ax1x1.jpg) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;![](logo.jpg)<br> COMPASS MINERALS INTERNATIONAL, INC.<br> 9900 WEST 109TH ST., SUITE 100<br> OVERLAND PARK, KS 66210  | Your **Vote** Counts!<br> **COMPASS MINERALS INTERNATIONAL, INC.**<br> 2026 Annual Meeting<br> Vote by March 4, 2026 11:59 PM ET. For shares held in a <br>Plan, vote by March 3, 2026 11:59 PM ET.<br> ![](cmp014557_defa14ax1x1.jpg) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;V82819-P44516 |  |

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You invested in COMPASS MINERALS INTERNATIONAL, INC. and it's time to vote!<br>You have the right to vote on proposals being presented at the Annual Meeting. **This is an important notice regarding the availability of proxy materials for the stockholder meeting to be held on March 5, 2026.**

Get informed before you vote<br>View the Notice and Proxy Statement and Annual Report on Form 10-K online OR you can receive a free paper or email copy of the material(s) by requesting prior to February 19, 2026. If you would like to request a copy of the material(s) for this and/or future stockholder meetings, you may (1) visit www.ProxyVote.com, (2) call 1-800-579-1639 or (3) send an email to sendmaterial@proxyvote.com. If sending an email, please include your control number (indicated below) in the subject line. Unless requested, you will not otherwise receive a paper or email copy.

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| | | |
|:---|:---|:---|
| ![](cmp014557_defa14ax1x2.jpg) | For complete information and to vote, visit **www.ProxyVote.com** | For complete information and to vote, visit **www.ProxyVote.com** |
| ![](cmp014557_defa14ax1x2.jpg) | Control # | ![](cmp014557_defa14ax1x3.jpg) |

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|:---|:---|:---|
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Smartphone users**<br> Point your camera here and <br> vote without entering a <br> control number | ![](cmp014557_defa14ax1x5.jpg) | &nbsp;&nbsp;&nbsp;&nbsp; **Vote Virtually at the Meeting\***<br> March 5, 2026<br> 9:00 a.m. Central Time |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Smartphone users**<br> Point your camera here and <br> vote without entering a <br> control number | Virtually at:<br>www.virtualshareholdermeeting.com/CMP2026 | Virtually at:<br>www.virtualshareholdermeeting.com/CMP2026 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ![](cmp014557_defa14ax1x4.jpg) | Virtually at:<br>www.virtualshareholdermeeting.com/CMP2026 | Virtually at:<br>www.virtualshareholdermeeting.com/CMP2026 |
|  | Virtually at:<br>www.virtualshareholdermeeting.com/CMP2026 | Virtually at:<br>www.virtualshareholdermeeting.com/CMP2026 |

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\*Please check the meeting materials for any special requirements for meeting attendance.<br>

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**Vote at www.ProxyVote.com**

**THIS IS NOT A VOTABLE BALLOT**

This is an overview of the proposals being presented at<br> the upcoming stockholder meeting. Please follow the instructions on <br> the reverse side to vote these important matters.

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| | | | |
|:---|:---|:---|:---|
| **Voting Items** | **Voting Items** | **Board**<br>**Recommends** | **Board**<br>**Recommends** |
| 1. | Elect nine director nominees, each for a one-year term. |  |  |
|  | **Nominees:** |  |  |
| 1a) | Edward C. Dowling, Jr. | ![](cmp014557_defa14ax2x1.jpg) | **For** |
| 1b) | Richard P. Dealy | ![](cmp014557_defa14ax2x1.jpg) | **For** |
| 1c) | Gareth T. Joyce | ![](cmp014557_defa14ax2x1.jpg) | **For** |
| 1d) | Melissa M. Miller | ![](cmp014557_defa14ax2x1.jpg) | **For** |
| 1e) | Joseph E. Reece | ![](cmp014557_defa14ax2x1.jpg) | **For** |
| 1f) | Mark Roberts | ![](cmp014557_defa14ax2x1.jpg) | **For** |
| 1g) | David Safran | ![](cmp014557_defa14ax2x1.jpg) | **For** |
| 1h) | Russell Ball | ![](cmp014557_defa14ax2x1.jpg) | **For** |
| 1i) | Denise Merle | ![](cmp014557_defa14ax2x1.jpg) | **For** |
| 2. | Approve, on an advisory basis, the compensation of our named executive officers. | ![](cmp014557_defa14ax2x1.jpg) | **For** |
| 3. | Ratify the appointment of KPMG LLP as our independent registered public accounting firm for fiscal 2026. | ![](cmp014557_defa14ax2x1.jpg) | **For** |
| **In their discretion, the named proxies are authorized to vote on any other business properly brought before the meeting and any adjournments or postponements thereof.** | **In their discretion, the named proxies are authorized to vote on any other business properly brought before the meeting and any adjournments or postponements thereof.** | **In their discretion, the named proxies are authorized to vote on any other business properly brought before the meeting and any adjournments or postponements thereof.** | **In their discretion, the named proxies are authorized to vote on any other business properly brought before the meeting and any adjournments or postponements thereof.** |

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&nbsp;&nbsp;**Prefer to receive an email instead? While voting on www.ProxyVote.com, be sure to click "Delivery Settings".**

V82820-P44516

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