Notice of Special Meeting of Shareholders

10 September 2025

Public Policy Holding Company, Inc.

("PPHC", the "Company" or the "Group")

Notice of Special Meeting of Shareholders

Public Policy Holding Company, Inc., a leading global strategic communications provider, offering a comprehensive range of advisory services in the areas of Government Relations, Public Affairs, and Corporate Communications, announces that a Notice of Special Meeting of Shareholders ("The Notice") will today, 10 September 2025, be distributed to the Company's shareholders and published on the Company's website at https://pphcompany.com/. The Special Meeting of Shareholders will be held at the offices of the Company, 800 North Capitol Street, N.W., Washington, DC 20002, United States, on 29 September 2025 at 10:00 A.M. EDT.

As further explained in the Notice of Special Meeting of Shareholders, in connection with, and to facilitate, the Company's anticipated listing on the Global Market of the Nasdaq Stock Market LLC ("Nasdaq"), the Board has adopted resolutions declaring advisable and recommending to the Company's stockholders for their approval, certain amendments to the Company's certificate of incorporation, including (i) to eliminate shareholder pre-emption rights in connection with any issuance of new shares or certain other convertible or option securities by the Company in order to better align with likely US market expectations regarding such rights; (ii) with effect from the completion of the anticipated US listing, termination of the mandatory takeover offer provisions in order again to better align with likely US market expectations; and (iii) to effect a reverse stock split (the "Reverse Stock Split") in a ratio between one (1) for three (3) and one (1) for eight (8), the actual ratio (the "Reverse Split Ratio") to be selected by the Board, or a pricing committee of the Board, prior to completion of our listing on Nasdaq based on market conditions and the advice of the Company's financial advisors.

As outlined in more detail in the Notice, no fractional shares would be issued in the Reverse Stock Split, but each fractional share of Common Stock would be rounded up to the nearest whole share of Common Stock. The authorized number of shares, and par value per share, of Common Stock would not be affected by the Reverse Stock Split. Finally, if the Reverse Stock Split is effectuated, it is expected that the current ISIN in relation to the existing Common Stock will be disabled and marked for expiry in CREST after market close on 1 October 2025 and that a new ISIN (US7444302084) will come into effect at 8:00 a.m. BST on 2 October 2025.

Enquiries

About PPHC

Incorporated in 2014, PPHC is a global government relations, public affairs and strategic communications group providing clients with a fully integrated and comprehensive range of services including government and public relations, research, and digital advocacy campaigns. Engaged by approximately 1,300 clients, including companies, trade associations and non-governmental organisations, the Group is active in all major sectors of the economy, including healthcare and pharmaceuticals, financial services, energy, technology, telecoms and transportation. PPHC's services support clients to enhance and defend their reputations, advance policy goals, manage regulatory risk, and engage with federal and state-level policy makers, stakeholders, media, and the public.

PPHC operates a holding company structure and currently has eleven operating entities operating globally. The Group has a strong track record of organic and acquisitive growth, the latter focused on enhancing its capabilities and establishing new verticals, either within new geographies or new related offerings.

For more information, see www.pphcompany.com