X0306 4 2022-07-05 0 0001856031 Vivid Seats Inc. SEAT 0001744219 Eldridge Industries, LLC 600 STEAMBOAT ROAD GREENWICH CT 06830 0 0 1 0 0001817070 Horizon Sponsor, LLC 600 STEAMBOAT ROAD GREENWICH CT 06830 0 0 1 0 0001744269 Boehly Todd L 600 STEAMBOAT ROAD GREENWICH CT 06830 1 0 1 0 0001900094 POST PORTFOLIO TRUST, LLC 600 STEAMBOAT ROAD GREENWICH CT 06830 0 0 1 0 Class A Common Stock 2022-07-05 4 A 0 1239999 A 53297172 I See Footnotes Warrants (Rights to Acquire) 11.50 2022-07-05 4 D 0 5166666 D Class A Common Stock 5166666 6519791 I See Footnotes Pursuant to the Prospectus/Offer to Exchange that is included in the Registration Statement on Form S-4, initially filed by the Issuer with the SEC on May 26, 2022, the Reporting Person tendered Warrants to acquire Class A common stock ("Class A Common") and received .24 shares of Class A Common per Warrant. With respect to the reported securities, Horizon Sponsor, LLC ("Sponsor") directly holds 16,789,999 of the reported shares of Class A Common and all of the reported warrants to acquire shares of Class A Common and Post Portfolio Trust, LLC ("Post Portfolio") directly holds 36,507,173 of the reported shares of Class A Common. Each of the Sponsor and Post Portfolio is indirectly controlled by Eldridge Industries, LLC. Todd L. Boehly is the indirect controlling member of Eldridge Industries, LLC and, in such capacity, may be deemed to have voting and dispositive power over the reported securities. Each of the foregoing persons disclaims beneficial ownership except to the extent of such person's pecuniary interest therein. Solely for purposes of Section 16 of the Securities and Exchange Act of 1934, Sponsor, Post Portfolio, and Eldridge Industries may be deemed directors by deputization with respect to the Issuer. /s/ Eldridge Industries, LLC, By: /s/ Todd L. Boehly, Authorized Signatory 2022-07-07 /s/ Todd L. Boehly 2022-07-07 /s/ Horizon Sponsor LLC, By: Todd Boehly, Chief Executive Officer 2022-07-07 /s/ Post Portfolio Trust, LLC, By: Todd L. Boehly, Chief Executive Officer 2022-07-07