---
title: "Boring Company’s $3B Series D: UAE Lead Marks $23B Tunnel Bet"
description: "Musk’s tunneling company closed $3B Series D at $23B on Sep 10, 2026 — UAE-led, with a16z and Sequoia in — tied to >150 km of planned Emirates tunnels while Las Vegas Loop remains the live proof."
date: 2026-09-11T00:00:00.000Z
source: https://venturecapitaltracker.com/2026-boring-company-3b-series-d-23b-uae
---

# Boring Company’s $3B Series D: UAE Lead Marks $23B Tunnel Bet

> Musk’s tunneling company closed $3B Series D at $23B on Sep 10, 2026 — UAE-led, with a16z and Sequoia in — tied to >150 km of planned Emirates tunnels while Las Vegas Loop remains the live proof.

**[The Boring Company](/startup/the-boring-company)** closed a **$3 billion** Series D on **September 10, 2026**, at a **$23 billion** valuation. The **United Arab Emirates** led. [Andreessen Horowitz](/fund/andreessen-horowitz), [Sequoia Capital](/fund/sequoia), Human Capital, Vy Capital, Valor Equity Partners, Temasek, Shamal Holding, and Baron Capital participated (company statement via Reuters / TechCrunch).

This is not a Las Vegas Loop follow-on alone — the cheque is priced against a **sovereign tunnel program** (>150 km planned in the UAE) while the live product remains a thin corridor network in Nevada and a Nashville start.

## Key facts

| Field | Detail |
| --- | --- |
| Company | [The Boring Company](/startup/the-boring-company) ([boringcompany.com](https://www.boringcompany.com)) |
| Round | **$3B** Series D at **$23B** |
| Lead | United Arab Emirates (and affiliated entities) |
| Notable participants | a16z, Sequoia, Human Capital, Vy Capital, Valor, Temasek, Shamal, Baron |
| Live ops | Las Vegas Loop (casinos / convention center) |
| Near-term US | Nashville ~10-mile underground loop underway |
| UAE plan | **>150 km** of tunnels tied to the partnership |
| Prior signal | WSJ (July): company sought **as much as $4B** |

*Temasek, Valor Equity Partners, Human Capital, Vy Capital, Shamal Holding, and Baron Capital have *

## Who uses the product — and for what job

**Users today:** Las Vegas visitors and convention traffic moving between hotel-casinos and the LVCC via Loop tunnels. **Buyers:** city / tourism / convention authorities and, with this round, a Gulf sovereign program.

**Job:** move vehicle travel into a three-dimensional underground network so surface streets stop absorbing peak demand. The company frames the goal as “solve traffic.” Revenue, ridership, and cost-per-kilometer were **not disclosed** in the Series D coverage.

## Why now

- UAE capital arrives with a **kilometers commitment**, not only a valuation print — that converts a science-project narrative into a construction backlog story.
- Nashville expands the US footprint beyond a casino Loop, which matters if the thesis is city systems rather than themed mobility.
- July’s **up-to-$4B** shop (WSJ) closed at **$3B / $23B** — still a mega-cheque, but smaller than the high end of talks.

## Why these investors — portfolio fit

| Investor | Likely fit |
| --- | --- |
| UAE | Infrastructure + tourism/mobility sovereignty; tunnels are the product the cheque buys |
| [a16z](/fund/andreessen-horowitz) | Hard-tech / “build” mandate; Musk-adjacent infra with crossover optics |
| [Sequoia](/fund/sequoia) | Continuity with other physical-world scale bets; brand + distribution into LP narratives |
| Valor / Temasek / others | Long-duration capital for multi-year dig schedules |

The unresolved diligence question is **unit economics of digging and operating Loops** at city scale — ridership, fare, and construction cost per km were not published with the raise.

## Competitive map

| Approach | Tradeoff |
| --- | --- |
| Surface transit / highways | Known ops; congestion remains |
| Metro / rail tunnels | Proven mass transit; different vehicle model |
| Boring Loop (cars underground) | Flexible routing for vehicles; thin public operating proof outside Vegas |

## What remains undisclosed

ARR / revenue, tunnel cost per km, ridership, and how much of the $3B is earmarked for UAE vs US projects. Until those numbers print, $23B is a **sovereign partnership mark**, not a cash-flow multiple.

## Sources

- [TechCrunch](https://techcrunch.com/2026/09/10/the-boring-company-raises-3b-in-round-led-by-uae/)
- [Reuters](https://www.reuters.com/business/musks-tunnel-startup-boring-company-raises-3-billion-23-billion-valuation-2026-09-10/)

**By:** [Venture Capital Tracker](https://venturecapitaltracker.com/editorial-policy)

**Editorial note:** AI tools assisted with research, structure, or drafting. Venture Capital Tracker retains human editorial responsibility for factual accuracy, relevance, and source quality before publication.