Centuri Holdings, Inc. has announced a new shareholder agreement in connection with its recent Offering. As per the Underwriting Agreement, the company, along with its directors, executive officers, the Selling Stockholder, and the Icahn Investors, have agreed to a 45-day lock-up period during which they are restricted from selling or transferring any Centuri Common Stock without prior written consent from J.P. Morgan Securities LLC, the representative of the underwriters. Additionally, the company has granted the Icahn Investors certain resale registration rights through a Registration Rights Letter Agreement, effective from May 19, 2025. This agreement allows the Icahn Investors to resell shares acquired in a Concurrent Private Placement, with the company committed to registering these resales within 181 days of the placement. However, the Icahn Investors do not have the rights to demand underwritten offerings or participate in "piggyback" registrations.