SCHEDULE 13G/A 0001172661-25-000212 0001216488 XXXXXXXX LIVE 3 Class A common stock, par value $0.0001 per share 06/30/2025 0001841925 INDIE SEMICONDUCTOR, INC. 45569U101 32 Journey Aliso Viejo CA 92656 Rule 13d-1(b) FRONTIER CAPITAL MANAGEMENT CO.,LLC DE 9034858.00 0.00 17960663.00 0.00 17960663.00 N 9.22 IA INDIE SEMICONDUCTOR, INC. 32 Journey, Aliso Viejo, California, 92656 FRONTIER CAPITAL MANAGEMENT CO., LLC 99 Summer Street Boston, MA 02110 Delaware N IA 17,960,663 9.22% 9,034,858 0 17,960,663 0 Y Y Y Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11. FRONTIER CAPITAL MANAGEMENT CO.,LLC Robert E. Phay 08/14/2025