SB Energy, the AI power infrastructure company backed by SoftBank, OpenAI, and Nvidia, has filed for an initial public offering with the Securities and Exchange Commission2,3. The company is aiming to raise between $5 billion and $7 billion from the offering, according to the Wall Street Journal, and could begin trading as soon as this month1.
SB Energy will trade on the Nasdaq and Nasdaq Texas under the ticker symbol SBE.
The S-1 filing carries a blunt concentration warning: SB Energy said it is "substantially dependent" on OpenAI as both a tenant and equity investor. "This concentration means that our near-term revenues, project-level financing arrangements, and development plans are significantly linked to OpenAI's continued performance under our lease and related agreements," the filing states. OpenAI was mentioned 306 times in the prospectus, compared with 325 mentions for SoftBank and 135 for Nvidia.
SB Energy has also awarded OpenAI warrants worth approximately $5.5 billion, deepening the financial entanglement between the two companies. OpenAI CEO Sam Altman was an early personal investor in SB Energy. SoftBank is the controlling shareholder.
The filing reveals a company that is pre-operational on its core business line. None of SB Energy's data centers are operational as of the filing date, and the company has not yet generated any revenue from the data center portion of its business. For the first half of 2026, SB Energy incurred net losses of roughly $3.2 billion and generated about $139 million in revenue, mostly from its legacy energy business. The company relies heavily on outside financing from partners for its data center campuses.
Nvidia announced in August that it would provide $105 billion in financing for an OpenAI data center in Ohio that will be built by SB Energy.
The prospectus enumerated several risk factors beyond OpenAI concentration: public backlash against data centers, including "growing public resistance to AI and AI-related infrastructure"; community opposition and local moratoria; technological advancements that could render its facilities obsolete; failure of businesses to adopt AI; regulatory changes; and decelerating capital expenditure from hyperscalers.
ANALYSIS The IPO tests investor appetite for a pure-play AI infrastructure company that has no operational data centers, carries multi-billion-dollar losses, and ties its fortunes almost entirely to a single tenant. The $5.5 billion in warrants awarded to OpenAI further binds the two entities, making SB Energy's valuation a derivative bet on OpenAI's own trajectory.
OpenAI itself is preparing for an IPO, and its advertising business recently reached $1 billion in annualized revenue run rate ctx. ◆ SB Energy's filing adds another data point to the expanding financial architecture around OpenAI, which now spans direct equity, infrastructure warrants, government contracts, and a nascent ad business.