SoftBank-Backed SB Energy Nears US IPO: What Investors Need to Know

TradingKey - On May 20 local time, SB Energy Corp. (ELPC), a digital infrastructure company backed by SoftBank Group, announced that it has confidentially submitted a draft registration statement on Form S-1 to the U.S. Securities and Exchange Commission, officially initiating its U.S. listing process.

Starting as a solar and energy storage developer, the California-based enterprise has evolved into a full-stack AI infrastructure platform spanning natural gas power generation and data center construction, targeting a market worth hundreds of billions of dollars fueled by global demand for AI computing power.

Listing Timeline and Valuation Expectations

SB Energy has opted to initiate its IPO process through a confidential filing, a common practice permitted by U.S. regulatory rules where the company is not required to make its prospectus public until the SEC completes its review of the registration statement. Following industry convention, such IPOs typically take weeks to months to reach the public roadshow stage.

Notably, OpenAI is also in intensive preparations for a U.S. listing; Reuters reports that OpenAI is preparing to confidentially file for a U.S. IPO in the coming weeks.

If both entities list successfully, SoftBank will gain public market pricing and asset liquidity for two of its core assets. SoftBank holds an approximately 13% stake in OpenAI and is also one of SB Energy's largest shareholders; SB Energy alone has raised more than $1.8 billion from SoftBank, OpenAI, and Ares Management over the past year.

[SOLV Energy Market Cap History, Source: Companiesmarketcap.com]

While the specific valuation range has not yet been disclosed in public filings, the market widely expects SB Energy's IPO valuation to be met with strong investor demand. Referring to recent cases, solar and energy storage developer SOLV Energy saw its stock price rise over 22% on its first day of trading on the Nasdaq this February, with its market cap approaching $6 billion.

Enhanced geothermal developer Fervo Energy went public on the Nasdaq two weeks ago with a fundraising amount of approximately $18.9 billion, surging 35% on its first day as its market cap exceeded $10 billion. Given the dual tailwinds of clean energy and AI infrastructure, SB Energy's valuation is highly likely to stay within or above the median range of these recent cases.

Three Core Investment Highlights

The core investment thesis SB Energy presents to investors is concise yet compelling: the fundamental requirements for AI are sufficient power and physical facilities for operating chips. The company has secured over $18 billion in project financing, with approximately 5 gigawatts of energy assets in operation or under construction across the U.S., and is currently building several data center campuses for AI clients.

^{(Note: A gigawatt (GW) is an immense unit of power used to measure the instantaneous rate of energy output or consumption. It is frequently employed to describe the installed capacity of large power plants, the load scale of national grids, and more recently, the power consumption of massive AI data centers.)}

Deep alignment with OpenAI secures long-term demand. In January 2026, OpenAI and SoftBank Group each invested $500 million in SB Energy, for a total equity injection of $1 billion, officially incorporating it into the Stargate execution framework. OpenAI has commissioned SB Energy to build and operate its 1.2 GW data center campus in Milam County, Texas, as the first project to emerge from the partnership.

The core barrier of integrated computing and power. The PORTS campus in Ohio is SB Energy’s core asset: with a total investment of approximately $33 billion, the plan calls for the simultaneous development of 10 GW of data centers and 9.2 GW of natural gas power generation, complemented by $4.2 billion in grid upgrades.

SoftBank’s Capital Endorsement and Market Opportunities

For SoftBank, pushing for SB Energy's independent listing serves both short-term financing needs and medium-to-long-term strategic considerations. SoftBank is currently arranging approximately $40 billion in loans to increase its investment in OpenAI, with its leverage ratio approaching a warning line; SB Energy's IPO could effectively alleviate the parent company's liquidity pressure. Over the long term, SoftBank aims to use this listing to scale and replicate the "energy and computing power" model, consolidating its influence in the AI infrastructure space.

Investment institutions are generally optimistic about SB Energy's prospects. A fund manager at Aizawa Securities noted that SoftBank has historically held a large volume of unlisted assets, making it difficult for investors to accurately assess its portfolio value. As core assets like SB Energy and OpenAI go public, SoftBank will gain both asset liquidity and clear market pricing, providing a structural tailwind for its valuation framework.

[Natural Gas Price Overview, Source: Tradingeconomics.com]

Investors should note that the fuel costs of natural gas power generation are highly sensitive to energy price fluctuations; while natural gas prices are currently at a cyclical low, their inherent cyclicality should not be ignored.

Furthermore, data center construction is capital-intensive with long payback periods, and changes in financing conditions could impact project timelines; the full IPO prospectus has not yet been released, and key information such as customer concentration, use of proceeds, and management-identified risks remains to be disclosed.

Only limited information is available during the confidential filing phase. Before the prospectus is officially released, investors should avoid making investment judgments based solely on SoftBank's backing and instead wait for more fundamental data to be disclosed to verify its long-term investment value.