UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

(Rule 14a-101)

INFORMATION REQUIRED IN PROXY STATEMENT

SCHEDULE 14A INFORMATION

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

PHILLIPS 66

(Name of Registrant as Specified In Its Charter)

Elliott Investment Management L.P.

ELLIOTT ASSOCIATES, L.P.

ELLIOTT INTERNATIONAL, L.P.

THE LIVERPOOL LIMITED PARTNERSHIP

Elliott Investment Management GP LLC

Paul E. Singer

BRIAN S. COFFMAN

SIGMUND L. CORNELIUS

MICHAEL A. HEIM

STACY D. NIEUWOUDT

GREGORY J. GOFF

(Name of Persons(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

Elliott Investment Management L.P., together with the other participants named herein (collectively, “Elliott”), has filed a definitive proxy statement and accompanying GOLD proxy card with the Securities and Exchange Commission (“SEC”) to be used to solicit proxies with respect to the election of Elliott’s slate of highly qualified director candidates and the other proposals to be presented at the 2025 annual meeting of stockholders of Phillips 66, a Delaware corporation (the “Company”).

Item 1: On April 29, 2025, Elliott issued the following press release:

Elliott Management Releases Investor Presentation on Phillips 66

Highlights Path to Unlocking Substantial Upside By Reversing Company’s Cycle of Underperformance

“Streamline 66” Plan Would Transform Phillips 66 Through Board Enhancements, Operational Improvements and Portfolio Simplification

Click Here to Download the Full Presentation

WEST PALM BEACH, FLA. (April 29, 2025) – Elliott Investment Management L.P. (“Elliott”), which manages funds that together make it a top-five shareholder in Phillips 66 (NYSE: PSX) (the “Company” or “Phillips”), today released an investor presentation titled “Streamline 66: Elliott’s Perspectives on Value Creation.”

The full presentation can be downloaded by clicking here. For more information, including how to vote for Elliott’s four nominees to the Phillips 66 Board using the GOLD proxy card, please visit Streamline66.com.

ADDITIONAL INFORMATION

Elliott Investment Management L.P., together with the other participants in Elliott’s proxy solicitation (collectively, “Elliott”), has filed a definitive proxy statement and accompanying GOLD universal proxy card with the Securities and Exchange Commission (“SEC”) to be used to solicit proxies with respect to the election of Elliott’s slate of highly qualified director candidates and the other proposals to be presented at the 2025 annual meeting of stockholders (the “Annual Meeting”) of Phillips 66, a Delaware corporation (“Phillips” or the “Company”). Stockholders are advised to read the proxy statement and any other documents related to the solicitation of stockholders of the Company in connection with the Annual Meeting because they contain important information, including information relating to the participants in Elliott’s proxy solicitation. These materials and other materials filed by Elliott with the SEC in connection with the solicitation of proxies are available at no charge on the SEC’s website at http://www.sec.gov. The definitive proxy statement and other relevant documents filed by Elliott with the SEC are also available, without charge, by directing a request to Elliott’s proxy solicitor, Okapi Partners LLC, at its toll-free number (877) 629-6357 or via email at info@okapipartners.com.

About Elliott

Elliott Investment Management L.P. (together with its affiliates, “Elliott”) manages approximately $72.7 billion of assets as of December 31, 2024. Founded in 1977, it is one of the oldest funds under continuous management. The Elliott funds' investors include pension plans, sovereign wealth funds, endowments, foundations, funds-of-funds, high net worth individuals and families, and employees of the firm.

Media Contact:

Casey Friedman

Elliott Investment Management L.P.

(212) 478-1780

cFriedman@elliottmgmt.com

Investor Contact:

Bruce Goldfarb / Pat McHugh

Okapi Partners LLC

(877) 629-6357

(212) 297-0720

info@okapipartners.com

Item 2: Also on April 29, 2025, Elliott posted materials to social media, copies of which are attached hereto in Exhibit 99.1 and incorporated herein by reference.

Item 3: Also on April 29, 2025, Elliott posted materials to Streamline66.com, copies of which are attached hereto in Exhibit 99.1 and incorporated herein by reference.