Reverse Stock Split Ratio

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 following the recommendation of the Board on 9 September 2025 and the approval of Shareholders on 29 September 2025, the Board has committed to a Reverse Stock Split announced by the Company on 10 September 2025 and determined the ratio to be one new share for every five existing shares (one-for-five) as held at the Record Date. Further, as previously outlined in the announcement on 10 September, no fractional entitlements will be issued in the Reverse Stock Split, but each fractional share of Common Stock (determined for each holder after aggregating all shares held by such holder) will instead be rounded up to the nearest whole share of Common Stock. The authorized number of shares, and par value per share, of Common Stock will not be affected by the Reverse Stock Split. The Company confirms that the current ISIN (US7444301094) 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 replace it. The Reverse Stock Split will therefore have been completed as at the Effective Date of at 8:00 a.m. BST on 2 October 2025, with trading then commencing under the new ISIN accordingly.