TORTOISE ENERGY INFRASTRUCTURE CORP

For the period ended Aug 8, 2024. Filed Jul 8, 2024.

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What shareholders are asked to vote on at a company's meeting. It is where to find what directors and top executives are paid, and who owns the most shares.

Aug 8, 2024 · Filed Jul 8, 2024

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TYG$35.90+1.0%Stored close · as of Nov 6, 2026

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Contents

COMBINED PROXY STATEMENT

ANNUAL MEETING OF STOCKHOLDERS

August 8, 2024

This combined proxy statement is being sent to you by the Boards of Directors of each ofTortoise Energy Infrastructure Corporation (“TYG”), Tortoise Power and Energy Infrastructure Fund, Inc. (“TPZ”), Tortoise Midstream Energy Fund, Inc. (“NTG”), Tortoise Pipeline & Energy Fund, Inc. (“TTP”), Tortoise Energy Independence Fund, Inc. (“NDP”) and Ecofin Sustainable and Social Impact Term Fund (“TEAF”)(each a “Company” and collectively, the “Companies”). The Board of Directors of each Company is asking you to complete and return the enclosedWHITEproxy card, permitting your shares of the Company to be voted at the annual meeting of stockholders called to be held on August 8, 2024. The Board of Directors of each Company has fixed the close of business on June 18, 2024 as the record date (the “record date”) for the determination of stockholders entitled to notice of and to vote at the meeting and at any adjournment thereof as set forth in this combined proxy statement. This combined proxy statement and the enclosed proxy are first being mailed to stockholders on or about, July 8, 2024.

Each Company’s annual report can be accessed through its link on the closed-end fund section of its investment adviser’s website (www.tortoiseadvisors.com) or on the Securities and Exchange Commission’s (“SEC”) website (www.sec.gov).

Important Notice Regarding the Availability of Proxy Materials for the Annual Meeting of Stockholders to be Held on August 8, 2024: This combined proxy statement is available on the internet athttps://cef.tortoiseadvisors.com/annual-proxy-information/. On this site, you will be able to access the proxy statement for the annual meeting and any amendments or supplements to the foregoing material required to be furnished to stockholders.

This combined proxy statement sets forth the information that each Company’s stockholders should know in order to evaluate each of the following proposals. The following table presents a summary of the proposals for each Company and the class of stockholders of the Company being solicited with respect to each proposal.

For Each Company
Proposals	Class of Stockholders of Each Company Entitled to Vote
1. To elect one director of the Company, to hold office for a term of three years and until his successor is duly elected and qualified.	For each of TYG, NTG and TTP – Preferred Stockholders only, voting as a class For each of TPZ, NDP and TEAF – Common Stockholders, voting as a class
For Each Company:
2. To ratify the selection of Ernst & Young LLP as the independent registered public accounting firm of the Company for the fiscal year ending November 30, 2024.	For each of TYG, NTG and TTP – Common Stockholders and Preferred Stockholders, voting together as a single class For each of TPZ, NDP and TEAF – Common Stockholders voting as a class
For Each Company:
3. To consider and take action on the non-binding Stockholder Proposal submitted by Saba, if properly presented at the meeting in accordance with federal proxy rules.	For each of TYG, NTG and TTP – Common Stockholders and Preferred Stockholders, voting together as a single class For each of TPZ, NDP and TEAF – Common Stockholders voting as a class
For TPZ Only:
4. To consider and take action on the non-binding Stockholder Proposal submitted by Bulldog (TPZ Proposal 4), if properly presented at the meeting in accordance with federal proxy rules.	For TPZ – Common Stockholders voting as a class
For NDP Only:
5. To consider and take action on the non-binding Stockholder Proposal submitted by Bulldog (NDP Proposal 4), if properly presented at the meeting in accordance with federal proxy rules.	For NDP – Common Stockholders voting as a class
For Each Company:
6. To consider and take action upon such other business as may properly come before the meeting as permitted by federal proxy rules and by NYSE rules.	For each of TYG, NTG and TTP – Common Stockholders and Preferred Stockholders, voting together as a single class For each of TPZ, NDP and TEAF – Common Stockholders voting as a class

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