Prometheus PubCo Inc.

1. Securities reported include shares of Class A common stock of the Issuer, par value $0.0001 per share ("Class A Shares"), held by the Reporting Person following the Issuer's business combination that closed on March 4, 2026 (the "Closing").

2. Also includes 1,851,161 Class A Shares (the "Earn-Out Shares") which, pursuant to that certain sponsor letter agreement entered into on August 5, 2025, by and among EQV Ventures Sponsor LLC (the "Sponsor"), Presidio Midco Inc., the Issuer, Prometheus Holdings LLC, Presidio Investment Holdings LLC and certain other individuals thereto (the "Sponsor Letter Agreement"), are subject to vesting (or forfeiture) on the basis of achieving certain trading price thresholds during the first five years following the Closing pursuant to an earnout program, with 50% of the Earn-Out Shares vesting, subject to the terms and conditions of the Sponsor Letter Agreement, at a price threshold of $12.50 per share and 50% of the Earn-Out Shares vesting, subject to the terms and conditions of the Sponsor Letter Agreement, at a price threshold of $15.00 per share.

3. Also includes 3,702,323 Class A Shares ("DRIP Shares") that are subject to restrictions and forfeiture provisions during the first three years following the Closing pursuant to a dividend reinvestment program, which will fall away during the first three years following the Closing, with one-third of the DRIP Shares vesting on the date that is 12 months following the Closing, one-half of the remaining DRIP Shares vesting on the date that is 24 months following the Closing and the remaining DRIP Shares vesting on the date that is 36 months following the Closing.

4. The Sponsor is the record holder of the securities reported herein. The Sponsor is governed by a board of managers, which includes the Reporting Person. The Reporting Person disclaims beneficial ownership of the reported securities except to the extent of his pecuniary interest therein.