Core Main Inc

Item 408(a) of Regulation S-K requires the Company to disclose whether any of its directors or officers have adopted orterminated (i) any trading arrangement that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c); and/or (ii) any written trading arrangement that meets the requirements of a “non-Rule 10b5-1 trading arrangement” as defined in Item 408(c) of Regulation S-K. During the quarter ended April 28, 2024, the following activity occurred requiring disclosure under Item 408(a) of Regulation S-K.

The Schaller Family GST Trust DTD 06/12/2020, affiliated with John R. Schaller, President, adopted a new trading arrangement on April 2, 2024 providing for the sale of up to 200,000 aggregate shares of the Company’s Class A common stock between July 2, 2024 and January 2, 2025.

The Irrevocable Trust FBO D. G. Gipson, affiliated with Dennis G. Gipson, Director, adopted a new trading arrangement on April 1, 2024, providing for the sale of up to 25,000 aggregate shares of the Company’s Class A common stock between July 1, 2024, and January 2, 2025.

Bradford A. Cowles, President, adopted a new trading arrangement on March 28, 2024 providing for the sale of up to 100,000 aggregate shares of the Company’s Class A common stock between June 27, 2024 and December 27 2024.

The James G. Castellano 2021 Family Trust, affiliated with James G. Castellano, Director, adopted a new trading arrangement on March 28, 2024 providing for the sale of up to 25,000 aggregate shares of the Company’s Class A common stock between June 27, 2024 and December 27 2024.

Each of the above trading arrangements is intended to satisfy the affirmative defense of Rule 10b5-1(c) under the Exchange Act and the Company’s Policy on Trading in Securities.