# EDGAR Filing Document

**Accession Number:** 0000879526
**File Stem:** 0001193125-26-134561
**Filing Date:** 2026-3
**Character Count:** 4573
**Document Hash:** 59fa6b5129c2cc4215dc24854f3535cf
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-134561.hdr.sgml**: 20260331

**ACCESSION NUMBER**: 0001193125-26-134561

**CONFORMED SUBMISSION TYPE**: DEFA14A

**PUBLIC DOCUMENT COUNT**: 3

**FILED AS OF DATE**: 20260331

**DATE AS OF CHANGE**: 20260331

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** WABASH NATIONAL Corp
- **CENTRAL INDEX KEY:** 0000879526
- **STANDARD INDUSTRIAL CLASSIFICATION:** TRUCK TRAILERS [3715]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 521375208
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** DEFA14A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-10883
- **FILM NUMBER:** 26821824

**BUSINESS ADDRESS:**
- **STREET 1:** 3900 MCCARTY LANE
- **CITY:** LAFAYETTE
- **STATE:** IN
- **ZIP:** 47905
- **BUSINESS PHONE:** 7657715310

**MAIL ADDRESS:**
- **STREET 1:** 3900 MCCARTY LANE
- **CITY:** LAFAYETTE
- **STATE:** IN
- **ZIP:** 47905

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** WABASH NATIONAL CORP /DE
- **DATE OF NAME CHANGE:** 19930328

**UNITED STATES** 

**SECURITIES AND EXCHANGE COMMISSION** 

**Washington, D.C. 20549** 

**SCHEDULE 14A** 

**Proxy Statement Pursuant to Section 14(a) of the** 

**Securities Exchange Act of 1934** 

**(Amendment No.)** 

Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐

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

## WABASH NATIONAL CORPORATION
**(Name of Registrant as Specified in Its Charter)** 

**(Name of Person(s) Filing Proxy Statement, if other than the Registrant)** 

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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Your Vote Counts! \*Please check the meeting materials for any special requirements for meeting attendance. Smartphone users Point your camera here and vote without entering a control number For complete information and to vote, visit www.ProxyVote.com Control # V85806-P46040 WABASH NATIONAL CORPORATION ATTN: LEGAL/CORPORATE SECRETARY 3900 MCCARTY LANE LAFAYETTE, IN 47905 2026 Annual Meeting Vote by May 12, 2026 11:59 PM ET WABASH NATIONAL CORPORATION You invested in WABASH NATIONAL CORPORATION and it's time to vote! 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 May 13, 2026. Get informed before you vote View the Combined Proxy Statement and 10-K online OR you can receive a free paper or email copy of the material(s) by requesting prior to April 29, 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. Vote Virtually at the Meeting\* May 13, 2026 10:00 A.M., Eastern Time Virtually at: www.virtualshareholdermeeting.com/WNC2026 wabash TM

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Vote at www.ProxyVote.com Prefer to receive an email instead? While voting on www.ProxyVote.com, be sure to click "Delivery Settings". Voting Items Board Recommends V85807-P46040 THIS IS NOT A VOTABLE BALLOT This is an overview of the proposals being presented at the upcoming stockholder meeting. Please follow the instructions on the reverse side to vote these important matters. 1. To elect nine members of the Board of Directors from the nominees named in the accompanying proxy statement; Nominees: 1a. Therese M. Bassett For 1b. John G. Boss For 1c. Trent J. Broberg For 1d. Larry J. Magee For 1e. Ann D. Murtlow For 1f. Sudhanshu Priyadarshi For 1g. Scott K. Sorensen For 1h. Stuart A. Taylor II For 1i. Brent L. Yeagy For 2. To approve, on an advisory basis, the compensation of our named executive officers; and For 3. To ratify the appointment of Ernst & Young LLP as Wabash National Corporation's independent registered public accounting firm for the year ending December 31, 2026. For NOTE: Such other business as may properly come before the meeting or any adjournment thereof.