DEFA14A 1 tm261343d3_defa14a.htm DEFA14A

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 x

Filed by a Party other than the Registrant o

Check the appropriate box:

o	Preliminary Proxy Statement
o	Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))
o	Definitive Proxy Statement
x	Definitive Additional Materials
o	Soliciting Material under §240.14a-12

TENNANT COMPANY

(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 the appropriate box):
x	No fee required.
¨	Fee paid previously with preliminary materials.
¨	Fee computed on table in exhibit required by Item 25(b) per Exchange Act rules 14a6(i)(1) and 0-11

Your Vote Counts! TENNANT COMPANY 10400 CLEAN STREET EDEN PRAIRIE, MN 55344-2650 TENNANT COMPANY 2026 Annual Meeting Vote by April 28, 2026 11:59 PM ET. For shares held in a plan, vote by April 24, 2026 11:59 PM ET. You invested in TENNANT COMPANY 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 shareholder meeting to be held on April 29, 2026. Vote Virtually at the Meeting* April 29, 2026 10:30 A.M. CDT Virtually at: www.virtualshareholdermeeting.com/TNC2026 *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 # V87164-P44741 Get informed before you vote View the Notice and Proxy Statement, Form 10-K online OR you can receive a free paper or email copy of the material(s) by requesting prior to April 15, 2026. If you would like to request a copy of the material(s) for this and/or future shareholder 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.

THIS IS NOT A VOTABLE BALLOT This is an overview of the proposals being presented at the upcoming shareholder meeting. Please follow the instructions on the reverse side to vote these important matters. 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 V87165-P44741 1. Elect three Class I directors to three-year terms. Nominees: 1a. Carol S. Eicher For 1b. Maria C. Green For 1c. Donal L. Mulligan For 2. Ratification of the appointment of Deloitte & Touche LLP as the independent registered public accounting firm of the Company for the year ending December 31, 2026. For 3. Advisory approval of executive compensation. For NOTE: NOTE: In their discretion, the Proxies are authorized to vote upon such other business as may properly come before the meeting.

SEC Form DEFA14A filed by Tennant Company