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 Pursuant to §240.14a-12

DowDuPont Inc.

(Name of Registrant as Specified In Its Charter)

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

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April 9, 2018

Dear Stockholder of DowDuPont Inc.:

We have previously sent to you proxy materials or a notice of availability of proxy materials for the DowDuPont Inc. Annual Meeting of Stockholders to be held on April 25, 2018. To date, we have not received your proxy.

Our Board of Directors unanimously recommends that you vote:

• FOR all of the director nominees in Agenda Item 1

• FOR Agenda Items 2 and 4

• ONE YEAR for Agenda Item 3

• AGAINST Stockholder Proposals 5 through 9

Your vote is important, no matter how many or how few shares you may own. To ensure that your shares are represented at the meeting, please vote today by telephone, via the Internet, or by signing, dating and returning the enclosed proxy card(s) in the envelope provided. If you hold your shares in multiple accounts, please be sure to vote using each proxy card you receive.

Very truly yours,

Stacy Fox

General Counsel and Secretary

REMEMBER:

You can vote your shares by telephone or via the Internet.

Please follow the easy instructions on the enclosed proxy card.

If you have any questions or need assistance in voting

your shares, please call our proxy solicitor:

INNISFREE M&A INCORPORATED

TOLL-FREE, at 1-877-750-9501.