FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

(Exact name of Registrant as Specified in Its Charter)

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

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Securities registered pursuant to Section 12(b) of the Act:

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter).

As previously disclosed, by letter dated April 24, 2026, Alexandra Herger advised the Board of Directors of Tortoise Energy Infrastructure Corporation (“TYG” or the “Company”) of her decision to resign as a director of TYG, effective as of July 1, 2026.

Effective July 1, 2026, in connection with the effective date of Ms. Herger’s resignation, the Board of Directors appointed John Maxwell, age 63, to succeed Ms. Herger as a director of the Company, and to serve as a member of the Nominating and Governance Committee of the Board of Directors. Mr. Maxwell also has been nominated by the Board of Directors to stand for election to a full 3‑year term as a Class I director at the Company’s 2026 Annual Meeting. Mr. Maxwell is not a party to any arrangement or understanding pursuant to which he was selected as a director of the Company and, apart from his appointment to serve as a director of the Company, Mr. Maxwell has no other relationship with the Company or its investment adviser, Tortoise Capital Advisors, L.L.C., and he does not have a direct or indirect material interest in any transaction required to be disclosed pursuant to Item 404(a) of SEC Regulation S-K.

Prior to his retirement in 2021, Mr. Maxwell served as Lead Portfolio Manager, Delaware Ivy Investments/Waddell & Reed/Ivy Investments (2006 – 2021); Analyst and Assistant Portfolio Manager, Delaware Ivy Investments/Waddell & Reed/Ivy Investments (1998 – 2006); Consumer Staples Analyst, Fort Washington Investment Advisors (1995 – 1998); Financial Analyst, Procter & Gamble (1992 – 1995); Engineer in Charge of Construction, Camp David, White House Military Office (1986 – 1990); First Lieutenant, U.S. Army Reserves, Corps of Engineers. He has held the Chartered Financial Analyst (CFA) designation since 1998. Mr. Maxwell also currently serves as an independent trustee for Tortoise Capital Series Trust.

Similarly to other directors, Mr. Maxwell will be compensated for his service on the Board of Directors in accordance with the 2025 director compensation elements described under the heading “Director and Officer Compensation” in the Company’s proxy statement filed with the Securities and Exchange Commission (“SEC”) on July 10, 2025.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.