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 July 28, 2024, the following activity occurred requiring disclosure under Item 408(a) of Regulation S-K.

Laura K. Schneider, Chief Human Resources Officer, adopted a new trading arrangement on July 12, 2024 providing for the sale of up to 195,695 aggregate shares of the Company’s Class A common stock between October 11, 2024 and April 11, 2025.

Jeffrey D. Giles, EVP Corporate Development, adopted a new trading arrangement on July 11, 2024 providing for the sale of up to 25,000 aggregate shares of the Company’s Class A common stock between October 11, 2024 and April 11, 2025.

Margaret M. Newman, Director, adopted a new trading arrangement on June 28, 2024 providing for the sale of up to 54,123 aggregate shares of the Company’s Class A common stock between September 27, 2024 and March 27, 2025.

Mark R. Witkowski, Chief Financial Officer, adopted a new trading arrangement on July 11, 2024 providing for the sale of up to 150,000 aggregate shares of the Company’s Class A common stock between October 10, 2024 and April 10, 2025.

Stephen O. LeClair, Chair of the Board and Chief Executive Officer, adopted a new trading arrangement on July 11, 2024 providing for the sale of up to 200,000 aggregate shares of the Company’s Class A common stock between October 11, 2024 and April 11, 2025.

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.