Public Policy Holding Company, Inc.

This section highlights information contained in other parts of this Proxy Statement. We encourage you to review this entire Proxy Statement for more detail on these items, as well as our Annual Report to Stockholders for the fiscal year ended December 31, 2025 (the “2025 Fiscal Year”).

In this Proxy Statement, the terms “PPHC,” the “Company,” the “Group,” “we,” “us,” and “our” refer to Public Policy Holding Company, Inc., a Delaware corporation, and its subsidiaries unless the context otherwise requires; the “Board” refers to the Company’s Board of Directors; the “Annual Meeting” refers to the Company’s 2026 Annual Meeting of Stockholders, including any adjournments or postponements thereof; and all references to “present” or “presence” refer to in person presence at the Annual Meeting.

This proxy statement and the Company’s Annual Report to Stockholders for the fiscal year ended December 31, 2025 (the “2025 Annual Report”) will be distributed on or about April 17, 2026 to our stockholders on the Record Date.

Matters to Be Voted On

We will also transact any other business that may properly come before the Annual Meeting.

About Public Policy Holding Company

We were founded in 2014 to create a company to bring together firms focused on strategic communications and government relations to address the complexity and costs facing corporate and non-profit entities in managing increasingly complicated and interdependent public policy and reputational challenges. The founders—a group of experienced federal government relations professionals and communications practitioners—believed that such a group would be capable of achieving higher revenue and profit margins in a highly fragmented and specialized industry through wider geographic reach and larger scale service capabilities. Our founders recognized the continuing increase in both corporate and non-profit spending on strategic consulting, including government relations and public affairs, and sought to benefit from this increase by integrating premium services, deep issue and policy expertise, and the geographic reach necessary to provide clients with a full suite of critical stakeholder solutions.

Drawing on prior experience at WPP plc and other advertising and public relations (“PR”) companies, the founders established a series of independently branded and managed vertical operating subsidiaries for better client management, conflict management, and talent retention, while achieving financial and operational synergies, savings and scalability within the Company group.

In 2021, our Common Stock, par value $0.001 per share (“Common Stock”) was listed on the AIM of the London Stock Exchange (the “AIM”), under the symbol “PPHC.L,” where it remains listed (the “UK IPO”).

In 2026, our Common Stock was listed on the Nasdaq Global Market (the “Nasdaq”), under the symbol “PPHC,” where it remains listed (the “US IPO”).

Key developments in our history are outlined below:

Corporate Governance

Key Highlights

We carefully consider our corporate governance practices and believe that they are appropriately tailored to our business and promote the long-term interests of our stockholders. Our corporate governance practices include:

•A majority of our Board is independent.

•All members of our Board’s Audit Committee, Compensation Committee and Nominating and Corporate Governance Committee are independent.

•Our Board is comprised of sophisticated, engaged directors with a range of experience and expertise.

•Our Board and its constituent committees under their charters play an active role in overseeing risk management, internal controls and reporting and our corporate governance policies.

•We have a robust code of business conduct and ethics applicable to all officers, directors and employees.

•Our Board periodically reviews our corporate governance structure, including committee charters, corporate governance guidelines, and code of conduct, to ensure they are appropriate for our operations and business.