UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from __________ to __________ Commission File Number: 001-39998 THUNDER BRIDGE CAPITAL PARTNERS III, INC. ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 FORM 10-Q (Mark One) (Exact name of registrant as specified in its charter ...