Tortoise Energy Infrastructure Corp.

Item 1.01. Entry into a Material Definitive Agreement. On September 22, 2026, Tortoise Energy Infrastructure Corporation (“TYG” or the “Company”) entered into a distribution agreement (the “Distribution Agreement”) with PINE Distributors LLC (the “Distributor”) in connection with the issuance and sale of up to 2,500,000 shares of common stock, $0.001 par value per share, of the Company (the “Common Shares”), from time to time, through the Distributor as the Company’s agent, in transactions deemed to be “at the market” as defined in Rule 415 under the Securities Act of 1933, as amended (the “Offering”). Pursuant to the Distribution Agreement, the Distributor may enter into sub-placement agent agreements with one or more selected dealers. The Distributor has entered into a sub-placement agent agreement, dated September 22, 2026 (the “Sub-Placement Agent Agreement”), with UBS Securities LLC (the “Sub-Placement Agent”) relating to the Common Shares to be offered under the Distribution Agreement. The Offering is being made pursuant to the Company’s effective shelf registration statement on Form N-2/ASR (File Nos. 333-295680; 811-21462), filed with the Securities and Exchange Commission on May 8, 2026, a base prospectus dated May 8, 2026 and a prospectus supplement dated September 22, 2026. The legal opinion, including the related consent, of Venable LLP relating to the issuance and sale of the Common Shares issued in the Offering is filed as Exhibit 5.1 hereto. The foregoing descriptions of the Distribution Agreement and the Sub-Placement Agent Agreement do not purport to be complete and are qualified in their entirety by reference to the full text of the Distribution Agreement filed with this report as Exhibit 1.1 and incorporated herein by reference, and the full text of the Sub-Placement Agent Agreement filed with this report as Exhibit 1.2 and incorporated herein by reference to this Current Report on Form 8-K. The Distribution Agreement and Sub-Placement Agent Agreement have been filed with this Current Report on Form 8-K to provide investors and security holders with information regarding their terms. It is not intended to provide any other factual information about the Company. The representations, warranties and covenants contained in the Distribution Agreement and Sub-Placement Agent Agreement were made only for purposes of such agreements and as of specific dates and were solely for the benefit of the parties to such agreements.