SEC Form 425 filed by Kayne Anderson NextGen Energy & Infrastructure Inc.

Filed pursuant to Rule 425 of the Securities Act of 1933, as amended

and deemed filed pursuant to Regulation 14A

under the Securities and Exchange Act of 1934, as amended

Subject Companies:

Kayne Anderson Energy Infrastructure Fund, Inc.

Commission File No. 811-21593

Kayne Anderson NextGen Energy & Infrastructure, Inc.

Commission File No. 811-22467

October 2, 2023

Dear Fellow Stockholders:

This quarterly update discusses the energy infrastructure markets, KMF’s portfolio, and the Fund’s year-to-date performance. While there is much uncertainty in the financial markets and competing narratives on the path forward for the economy, we believe the Fund’s investments are well positioned to generate compelling risk-adjusted returns for the next several years. Further, KMF’s balance sheet provides the Fund with flexibility to quickly adapt to changing market conditions. As it relates to fiscal Q3:

KYN & KMF Proposed Merger

Kayne Anderson Energy Infrastructure Fund, Inc. (NYSE: KYN) and KMF announced plans to combine the two funds earlier this year (the “Merger”), with KYN as the surviving entity. The definitive joint proxy statement/prospectus containing information about the Merger is now on file and available at SEC.gov, and the special meeting of stockholders to approve the Merger is scheduled for November 1^st. Please also refer to kaynefunds.com/insights for information on the Merger.⁽⁵⁾

Market Conditions

While the major U.S. equity indices have generated positive returns, fiscal 2023 has been a volatile year in the financial markets. Examples include the regional banking crisis during the spring, the political brinkmanship over the federal debt ceiling in May and, more recently, the rapid increase in interest rates (as measured by yields on U.S. Treasury bonds) in response to the Federal Reserve reiterating its commitment to keeping interest rates “higher for longer.” These events, in turn, have caused meaningful swings in stock prices. We expect this volatility to continue and, as a result, we have reduced leverage in response to these market conditions. Put simply, there is much uncertainty in the financial markets, and we do not expect this to change any time soon.

For instance, the state of the global economy remains a subject of much debate. Economic activity in the U.S. has been resilient thus far in fiscal 2023, and many economists are optimistic about the prospects for a “soft landing” in the domestic economy. We too are optimistic, but we readily acknowledge this outcome is far from certain. Further, we believe that there is a higher-than-normal probability of meaningful stock price volatility as the market digests new economic data points and the resulting implications for the economy. Our goal is to best position the Fund to withstand this volatility while at the same time capitalizing on our bullish outlook for the energy infrastructure sector.

Fiscal Q3 exhibited broad-based strength across sectors on solid earnings and positive inflation trends, though pockets of the market sold off on rising interest rates.

Endnotes can be found on page 4.

The energy sector (including energy infrastructure) enjoyed a very strong fiscal Q3. This is in contrast to the first six months of fiscal 2023, where weak stock price performance for energy companies did not reflect the companies’ solid financial and operating results. Importantly, nothing has changed in the midstream sector’s fundamentals to alter our constructive outlook; we continue to believe that consistent operating results, commitment to returning capital to investors, and steady growing dividends will prove to be a winning formula over time.

Fiscal Q3 was an active quarter in the capital markets for the midstream sector. Kodiak Gas Services (NYSE: KGS) completed the first midstream IPO since 2021. Additionally, NuStar Energy, Gibson Energy and Hess Midstream completed equity offerings during the quarter for aggregate proceeds of approximately $660 million. The midstream sector is very different from five years ago, and companies are no longer reliant on the capital markets to finance their growth projects. Nonetheless, we view these recent deals as an encouraging sign – investors are willing to allocate incremental capital to the sector.

Crude oil prices were up 23% in fiscal Q3, with WTI ending the quarter at ~$84 per barrel as global liquids demand reached record highs. In the weeks following quarter-end, supportive global inventory data and OPEC+ production restraint have driven spot prices in excess of $90 per barrel, introducing renewed focus on higher gasoline and diesel prices (and the associated implications for the domestic economy). Slower-than-expected Chinese demand growth, growing crude supply from the Americas (including emerging sources like Guyana), and significant Saudi spare capacity lead us to believe a sustained rally in excess of $100 per barrel is unlikely. However, we do believe that crude oil prices are likely to remain above $75 (barring an unexpected shift in OPEC+ policy). The combination of lower volatility in crude oil prices and measured domestic production growth provides a very constructive backdrop for our midstream investments.

The natural gas market also rebounded nicely during the quarter. After trading for several months near $2.00 per MMBtu, Henry Hub natural gas prices have recovered to a range of $2.50 to $2.80 per MMBtu. Reduced drilling in response to these low prices has begun to dampen the rate of supply growth, and an extremely warm summer in the U.S. is driving record levels of gas-fired power generation (~37 Bcf/d of demand)⁽¹¹⁾. The prices for natural gas in the futures market remain much higher at ~$3.60 per MMBtu in 2024 and above $4.00 in 2025. European and Asian gas prices spiked again during the quarter in response to potential strikes at Australian liquefied natural gas (“LNG”) production facilities, while U.S. LNG exports remain very strong (~11.5 Bcf/d, or virtually 100% utilization)⁽¹²⁾. Our outlook for North American natural gas consumption and LNG exports remains very constructive.

Portfolio and Performance

As has been the case for most of fiscal 2023, there was a large divergence during fiscal Q3 in performance between the midstream sector and the renewable and utilities sectors. Midstream equities were up meaningfully during the quarter, while higher interest rates and less accommodative capital markets have weighed on renewables and utilities equities. While we remain constructive on the fundamental longer-term outlook for U.S. utilities and renewables, the current market backdrop has us cautious in the near-term, and we have positioned the Fund’s portfolio accordingly.

Endnotes can be found on page 4.

KMF generated a total Net Asset Return of 8.3% in fiscal Q3, its best quarter since the second quarter of fiscal 2022. KMF’s Market Return, which is based on stock price performance rather than Net Asset Value, was 11.6% for fiscal Q3.(14) This exceeded our Net Asset Return as our stock price traded at a 15.2% discount to NAV as of August 31^st compared to a 17.7% discount at the beginning of the fiscal quarter.

While our near-term outlook for energy infrastructure is nuanced, our intermediate to longer-term outlook is positive for each subsector. In the current environment, we continue to favor companies that are funding capital spending from internally generated cash flow or have minimal external financial needs. We are also favoring companies that have strong balance sheets and manageable exposure to floating interest rates and near-term debt maturities. During fiscal Q3, we continued to increase KMF’s exposure to the midstream sector and decrease the Fund’s exposure to renewable infrastructure and utilities. As of August 31^st, midstream investments represented 76% of the Fund’s portfolio (66% of the portfolio at the end of fiscal 2022).

We believe midstream companies are better positioned to deal with near-term macroeconomic headwinds associated with higher interest rates and benefit from the tailwind of domestic oil and gas production growth. We are bullish on the longer-term outlook for renewable infrastructure and utilities – these sectors are poised to benefit from the energy transition. That said, the near-term outlook for these sectors is more challenging – there are a host of other income-oriented alternatives for investors given the higher interest rate environment, and these companies (most of which are not generating free cash flow) are faced with the challenge of efficiently financing their growth projects in the near term.

August 31, 2023

Distribution & Outlook

KMF recently announced a 16 cent per share distribution to be paid to investors in early October. As a reminder, once the combination with KYN is completed, we intend to recommend an additional one cent per share increase in KYN’s quarterly distribution rate (to $0.22 per share). KMF stockholders’ distribution is estimated to increase by approximately 17% once the combination is completed (on a pro forma basis).⁽¹⁵⁾

We encourage investors to visit our website at kaynefunds.com for more information about the Fund, including the commentary posted on the “Insights” page that discuss performance, key industry trends, and the Merger. We appreciate your investment in KMF and look forward to providing future updates.

Endnotes can be found on page 4.

KA Fund Advisors, LLC