FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 Public Policy Holding Company, Inc. Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 (Exact Name of Registrant as Specified in its Charter) (Primary Standard Industrial Classification Code Number) Delaware 8742 87-3557229 (I.R.S. Employer Identification Number) As filed with the Securities and Exchange Commission on October 10, 2025. Copies to: Roeland Smits Chief Financial Officer Public Policy Hol ...