Persona AI, the Houston humanoid robotics company founded in 2024, has sold about $65.4 million of a planned $142 million securities offering, according to a Form D the company filed with the Securities and Exchange Commission on September 14.

What the Filing Says

The filing lists a total offering of $141,964,814, of which $65,363,626 had been sold to 46 investors, leaving roughly $76.6 million still available. The first sale was dated August 28, 2026. The securities are equity, and the company is listed at a Houston address.

A Form D is a notice of a private offering, and it leaves out most of what people want to know. It does not name the investors, a lead, a valuation, or a share price, and Persona has not announced the round. Third-party databases have published valuation figures for it, but they disagree with each other and with the filing's totals, so we are not repeating them. The remaining $76.6 million is an amount the company may sell, not money it has.

Even the confirmed portion is a large step up. Persona's earlier funding was a $27 million pre-seed round announced in May 2025.

What the Money Is For

Persona has been unusually specific about its plan. In an August interview with IEEE Spectrum, co-founders Nicolaus Radford and Jerry Pratt described a deliberate turn away from the warehouse and general-labor work most humanoid companies pursue. "We started forming this thesis around skilled trades and tool usage," Radford said. The first trade is shipyard welding.

The details of that choice are worth laying out:

  • Same tools as people. The robot is a two-legged humanoid that uses standard handheld welding equipment, so a shipyard does not have to buy new tooling around it.
  • Long, straight welds first. A ship needs hundreds of kilometers of linear welds. They are the simplest kind, and welding speed is capped by how fast metal melts, about a centimeter per second, so a robot is not at a speed disadvantage. It mainly has to hold millimeter-scale motion for hours without tiring.
  • Legs for a reason. Shipyards have uneven floors, structural members to step over, and work at ground level, overhead, and through openings. The company says it considered four or more legs and judged two the least disruptive to how yards already work.
  • Output, not headcount. Persona's pitch is that shipbuilders have long order backlogs and too few welders, so a robot that adds capacity earns its keep even if it costs more than a person.

The company has two public partners, both Korean: HD Hyundai, the world's largest shipbuilder, and steelmaker POSCO. Radford told Spectrum that customers may support "hundreds" of robots per site, which describes interest and not an order. Persona has said it expects to deliver prototype units around the end of 2026.

Why It Matters for Houston

Radford led NASA's Valkyrie humanoid program at Johnson Space Center and later founded the company that became Nauticus Robotics. Pratt was chief technology officer at Figure. A raise of this size, if it fills, would make Persona one of the best-funded robotics startups ever based in the city, and it would be building a machine for heavy industry, which is the kind of work Houston knows.

It also puts a date on the question we raised in our guide to welding automation: whether a humanoid is the right answer to welding in spaces built for human bodies. The prototypes due at the end of this year are the first chance to find out.

Offering figures are from Persona AI Inc.'s Form D filed with the SEC on September 14, 2026. Strategy details and quotations are from IEEE Spectrum's August 2026 interview with the founders.