Summary:
Built In reported on Feb 18, 2026 that HUMAIN - a company owned by Saudi Arabia's Public Investment Fund (PIF) - invested $3 billion in Elon Musk's xAI as part of its Series E round. Because SpaceX agreed to acquire xAI earlier in February, HUMAIN's xAI shares converted into SpaceX shares. The deal also ties to a plan to build more than 500 megawatts of AI compute capacity in Saudi Arabia to run Grok, xAI's chatbot and model family.
Sources:
Key facts:
HUMAIN invested 3 billion dollars into xAI's Series E, becoming a minority shareholder.
That xAI stake converted into SpaceX shares after the SpaceX-xAI merger agreed in early February 2026.
The investment supports a plan to build over 500 megawatts of AI data-center and compute capacity in Saudi Arabia to run Grok.
What is HUMAIN:
HUMAIN describes itself as a PIF company delivering full-stack AI capabilities worldwide - meaning data centers, high-performance infrastructure, models, and enterprise solutions. In short, this is industrial-scale investment, not a small strategic check. See the PR Newswire announcement for details: prnewswire.com.
What the 500 megawatts means:
Megawatts here refer to the actual electrical power and cooling capacity needed to train and serve very large AI models. More megawatts means more racks, more GPUs or accelerators, and the physical infrastructure to run them. A 500 MW build is massive - it supports large-scale training and persistent serving at enterprise grade.
Timing and conversion:
SpaceX and xAI agreed to a merger in early February 2026. Because the transaction folded xAI into SpaceX, external xAI shareholders like HUMAIN did not hold xAI alone for long - their shares converted into SpaceX shares. The public releases do not detail the exact legal mechanics of the conversion, but the headline result is clear: HUMAIN now has exposure to SpaceX rather than only xAI. See the Washington Post coverage: washingtonpost.com.
Quote:
HUMAIN CEO Tareq Amin, formerly of Rakuten Mobile and Rakuten Symphony, said the move shows "conviction in transformational AI," and that xAI's path is strengthened by its acquisition by SpaceX. More from the announcement: prnewswire.com.
Quick context for non-VC readers:
A Series E is a late-stage financing round. Companies at this stage typically raise money to scale product, expand distribution, and, increasingly, to fund large compute builds. This particular round comes with real power commitments, not just model or product promises.
Why founders should care:
Capital is chasing watts, not just benchmarks - a 3 billion dollar check tied to a 500 MW build signals that infrastructure and power are becoming a competitive moat. See Built In: builtin.com.
Partnerships beat pleadings - if your product needs a lot of compute, lock in power, land, and suppliers early, or partner with a backer who already has them.
Valuation comps are shifting - investors increasingly value the ability to secure dedicated megawatts as much as model performance.
Sovereign money is strategic money - PIF-backed partners open doors but also bring increased regulatory attention. Know your exposure across the US, EU, and Gulf. See Times of India background: timesofindia.indiatimes.com.
Bottom line:
xAI got late-stage fuel, HUMAIN got exposure to SpaceX, and Grok got a runway powered in megawatts rather than vibes.
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