Elon Musk's Boring Company Raises $3 Billion Series D Led by UAE at $23 Billion Valuation

The Boring Company, the tunneling startup founded by Elon Musk in 2017, has raised a $3 billion Series D funding round that values the business at $23 billion, according to a company statement dated September 9, 2026. The round was led by the United Arab Emirates and affiliated investment entities. Reuters reported on September 10, 2026 that the tunnel construction startup founded by billionaire Elon Musk raised the new funding round at that valuation.

In 2022, The Boring Company was valued at $5.7 billion following a $675 million funding round, according to Reuters. The new $23 billion figure is more than four times that 2022 valuation and reflects how far the company's ambitions have expanded from a single test tunnel in California to projects in Nevada, Tennessee and the United Arab Emirates.

TechCrunch reported on September 10, 2026 that the Series D was led by the United Arab Emirates and that The Boring Company now plans to dig more than 150 kilometers of tunnels in the Middle Eastern country. The company said the proceeds would support an expanded partnership to develop more than 150 km (93 miles) of underground infrastructure across the UAE, building on the previously announced Dubai Loop project. The funds will also increase hiring across engineering, production and operations while expanding Loop projects in Las Vegas, Nashville and Dubai.

The investor list is a mix of existing backers and new capital. Other participants included Human Capital, Vy Capital, Valor Equity Partners, Sequoia Capital, Andreessen Horowitz, Temasek, Shamal Holding and Baron Capital, along with other existing and new investors. Gulf News reported on September 10, 2026 that the injection will support large-scale deployment of underground transport infrastructure across the UAE.

Key Facts

Reuters reported on September 10, 2026 that the round was led by the United Arab Emirates and affiliated investment entities. The Boring Company announced on September 9, 2026 that the Series D totaled $3 billion and that the financing values the company at $23 billion. The company said the proceeds would fund more than 150 kilometers of tunnel in the UAE and Loop projects in Las Vegas, Nashville and Dubai.

The round is a sharp increase from 2022, when the company was valued at $5.7 billion after a $675 million funding round. TechCrunch reported on September 10, 2026 that The Wall Street Journal had reported in July 2026 that The Boring Company was looking to raise as much as $4 billion, meaning the final $3 billion round came in below that reported target but still at a much higher valuation.

Investors in the Series D included Human Capital, Vy Capital, Valor Equity Partners, Sequoia Capital, Andreessen Horowitz, Temasek, Shamal Holding and Baron Capital. Shamal Holding, a Dubai-based global investment company, said in comments reported by Gulf News on September 10, 2026 that the technology has moved beyond proof of concept.

The Dubai Loop pilot phase involves 6.4 km of tunnel and four stations, with construction planned to begin in late 2026, and precast production already underway, according to the company. In Las Vegas, the Vegas Loop has carried more than four million passengers since 2021, and Clark County approved 19 additional stations, bringing the entitled network to 123 stations. New stations or connectors include Westgate, Encore, Fontainebleau and Sahara, and the company said the Encore connector was completed in under 12 weeks.

In Nashville, the Music City Loop began tunneling on February 25, 2026 after a Tennessee Department of Transportation permit. It is the company's first hard-rock project, with two machines mining by August 2026, and it will involve a 10-mile loop underground. The Boring Company also said its Prufrock tunnel-boring platform is central to its plans. In May 2025 it demonstrated Zero-People-in-Tunnel continuous mining, and by August 2026 ring building was fully autonomous, placing six concrete segments of about 3,750 pounds each in under a minute, monitored from its Global Operations Control Center in Texas.

Analysis

The bigger picture here is that sovereign-linked capital from the Gulf is now underwriting a private American infrastructure startup at a scale that traditional venture investors have rarely matched for tunneling. The United Arab Emirates led the $3 billion Series D, and the round included a mix of technology investors and regional holders such as Shamal Holding. That combination suggests the deal is not simply a financial bet on Musk's brand. It is a bet on a specific industrial capability: the ability to dig large amounts of tunnel quickly, repeatedly and with fewer people underground.

What this really means is that The Boring Company has shifted its center of gravity. The company built its reputation in Las Vegas, where the Loop has carried more than four million passengers since 2021 across an entitled network of 123 stations. But the new money is tied to a 150+ kilometer program in the UAE, plus the previously awarded Dubai Loop project, whose pilot phase covers 6.4 km and four stations. Gulf News noted that Dubai will become the second city in the world, after California, to implement the tunnel-based transport system, a reminder that the company's growth story is now as much about export markets as it is about its home market.

The valuation also invites scrutiny. The jump from $5.7 billion in 2022 to $23 billion in 2026 is more than four times, even though the company's revenue and project pipeline remain concentrated in a handful of cities. Gulf News noted that the funding is an important move for Boring, which has made little progress over the past decade in realising Musk's grand hyperloop visions. That contrast matters. The Loop is a lower-speed, smaller-footprint tunnel system for vehicles, while hyperloop was a much more ambitious vision. The Series D is funding Loop tunnels and Prufrock machinery, not a hyperloop network. Investors appear to be rewarding execution on the Loop and on autonomous ring building rather than the older, more speculative hyperloop concept.

Operationally, the technical milestones are meaningful. The company says ring building became fully autonomous by August 2026, placing six concrete segments of about 3,750 pounds each in under a minute. If that pace holds, it could reduce labor exposure and improve the economics of repetitive tunnel construction. The Zero-People-in-Tunnel continuous mining demonstration in May 2025 points in the same direction. Still, the hard work lies ahead: the Nashville project is the company's first hard-rock project, and the Dubai Loop pilot is only 6.4 km with four stations.

Why It Matters

The round matters because it shows how private infrastructure ventures can attract sovereign wealth at a time when many startups face tighter venture funding. A $3 billion round led by the UAE gives the company a rare pool of patient capital for a business that must build physical assets. It also deepens the UAE's role in shaping futuristic transportation, linking the country to a Musk-founded company that already operates in the United States.

For Musk's broader portfolio, the deal is a reminder that his private companies can still command large valuations even when public market sentiment around some of his ventures fluctuates. It also puts pressure on the company to deliver visible results in the UAE, where the 150+ kilometer plan and the Dubai Loop pilot will be watched closely.

For the transportation sector, the funding tests whether tunnel-based transit can move from demonstration projects to a repeatable product. The Vegas Loop has carried more than four million passengers since 2021, but it is a local system. Nashville is a 10-mile loop and a first hard-rock test. The UAE program is the largest planned deployment. If The Boring Company can replicate its Las Vegas operations at a larger scale, the round could mark a turning point for underground transport. If it cannot, the $23 billion valuation will look disconnected from the company's current footprint.

Next Up

The immediate next steps are hiring and construction. The company said the funds will increase hiring across engineering, operations and production and accelerate research and development of the Prufrock tunnel-boring platform. In the UAE, the Dubai Loop pilot phase covers 6.4 km and four stations, with construction planned to begin in late 2026 and precast production already underway.

In the United States, The Boring Company will continue expanding the Vegas Loop, where Clark County approved 19 additional stations for an entitled network of 123 stations, and the Music City Loop in Nashville, where two machines were mining by August 2026. The company's ability to convert the $3 billion Series D into completed tunnels will determine whether the $23 billion valuation becomes a platform for further growth or a peak that proves difficult to justify.