EIDP (CTA-PA) DFAN14A Additional proxy materials by non-management

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

(Rule 14a-101)

INFORMATION REQUIRED IN PROXY STATEMENT

Proxy Statement Pursuant to Section 14(a) of

the Securities Exchange Act of 1934

(Amendment No.    )

Filed by the Registrant  o                            Filed by a Party other than the Registrant  x

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

E. I. du Pont de Nemours and Company

(Name of Registrant as Specified In Its Charter)

Trian Fund Management, L.P.

Trian Fund Management GP, LLC

Trian Partners, L.P.

Trian Partners Strategic Investment Fund, L.P.

Trian Partners Strategic Investment Fund II, L.P.

Trian Partners Master Fund, L.P.

Trian Partners Parallel Fund I, L.P.

Trian Partners Master Fund (ERISA), L.P.

Trian Partners Strategic Investment Fund-A, L.P.

Trian Partners Strategic Investment Fund-D, L.P.

Trian Partners Strategic Investment Fund-N, L.P.

Trian SPV (SUB) VIII, L.P.

Trian Partners Fund (Sub)-G, L.P.

Trian Partners Fund (Sub)-G II, L.P.

Nelson Peltz

Peter W. May

Edward P. Garden

John H. Myers

Arthur B. Winkleblack

Robert J. Zatta

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

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Trian Fund Management, L.P. placed the following advertisement in a Wilmington, Delaware newspaper on May 3, 2015 and may from time to time place such advertisement in additional publications:

LEADING PROXY ADVISORY

FIRM ISS RECOMMENDS VOTE

FOR TRIAN NOMINEES NELSON

PELTZ AND JOHN H. MYERS

It is clear to us thatchange is needed on the DuPont Board, and Trian is deeply gratified that leading

independent proxy advisory firm Institutional Shareholder Services Inc. (“ISS”) agrees.

ISS supports Trian’s efforts to hold the Board accountable for DuPont’s consistent

underperformance, and has recommended that DuPont stockholders vote

FORTrian nominees Nelson Peltz and John H. Myers on theGOLD

proxy card at DuPont’s Annual Meeting on May 13, 2015.

ISS’s recommendation to vote on theGOLDcard underscores

Trian’s view that increased oversight is needed

in the DuPont boardroom to improve

performance and enhance

stockholder value.

ISS...

...CITES DUPONT’S UNDERPERFORMANCE

“[T]here is compelling evidence that the dissidents are onto something

in their critique. Operating efficiency is not what it should be, yet instead of

addressing the core issues, the board and management, at least in their communications

with shareholders, are more inclined to obfuscation than accountability.”

...CALLS FOR TRIAN TO BRING CHANGE TO THE BOARDROOM

“The evidence of this contest strongly suggests that the extensive preparation of the Trian method —

providing its executives who go on boards with extensive analytic support throughout their tenures — may

be not simply desirable, but necessary to drive the appropriate change. Ultimately this appears to be less

a ‘shadow management team’ than about a commitment to informed and effective participation in the

boardroom. Peltz’ election thus seems clearly in the best interest of all shareholders.”

...HIGHLIGHTS THE QUALIFICATIONS OF TRIAN’S FOUR NOMINEES

“Like Peltz, [Myers] brings an investor perspective to the boardroom — but he also has significant, long-term

experience managing and growing a business within a larger conglomerate structure.”

“Both Zatta and Winkleblack appear well-qualified nominees, particularly given their experience as CFO’s

with significant strategic responsibilities. In an engagement with the dissident nominees as part of our

research process, their CFO experiences seem sufficiently diverse to believe they would be

complementary, not duplicative in the boardroom.”

TRIAN BELIEVESALL FOUR OF ITS HIGHLY QUALIFIED

NOMINEESARE NEEDED IN THE BOARDROOM

TO HELP DUPONT BEGREATAGAIN.

PROTECT AND ENHANCE

YOUR INVESTMENT —

VOTEGOLD

TODAY

VOTE THEGOLDPROXY CARD

For more information, visitDuPontCanBeGreat.com

Note: Trian has neither sought nor obtained consent from any third party to use previously published information in this advertisement.

© 2015 Trian Fund Management, L.P. All rights reserved. Trian Fund Management, L.P. (“Trian”) and the investment funds that it manages that hold shares of E.I. du Pont de Nemours and Company (the “Company”), together with other Participants (as defined below), filed a definitive proxy statement and an accompanying proxy card with the Securities and Exchange Commission (the “SEC”) on March 25, 2015 to be used to solicit proxies in connection with the 2015 Annual Meeting of Stockholders of the Company, including any adjournments or postponements thereof or any special meeting that may be called in lieu thereof (the “2015 Annual Meeting”). Information relating to the participants in such proxy solicitation (the “Participants”) has been included in that definitive proxy statement and in any other amendments to that definitive proxy statement. Stockholders are advised to read the definitive proxy statement and any other documents related to the solicitation of stockholders of the Company in connection with the 2015 Annual Meeting because they contain important information, including additional information relating to the Participants. The Participants’ definitive proxy statement and a form of proxy have been mailed to stockholders of the Company. These materials and other materials filed by the Participants in connection with the solicitation of proxies are available at no charge at the SEC’s website at www.sec.gov. The definitive proxy statement and other relevant documents filed by the Participants with the SEC are also available, without charge, by directing a request to Trian’s proxy solicitor, MacKenzie Partners, Inc. 105 Madison Avenue, New York, New York 10016 (call collect: 212-929-5500; call toll free: 800-322-2885) or email: proxy@mackenziepartners.com.

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