# LongPath Technologies funding: rounds and investors

> LongPath Technologies has raised $162M across 1 round since 2024. Investors include US Department of Energy. Every round with its source.

Source: https://millionrounds.com/company/longpath-technologies (Millionrounds; every figure on the page links to its filing or article)

United States · [Funded startup](https://millionrounds.com/companies)

# Who invested in *LongPath Technologies*

One round we have observed, with the one investor named in it. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it.

Manufacturing

Funding summary Updated 26 Oct 2026

**$162M** raised across 1 round since 2024, from 1 source

- **Latest round:** Debt, $162M Oct 2024
- **Investors:** 1

See who backed them

## The rounds

- **Oct 2024** Debt **$162M** [US Department of Energy](https://millionrounds.com/fund/u-s-department-of-energy) Source recorded

## Founders and team

From LongPath Technologies's own website and the SEC filings it signed: 4 founders, 3 on the team.

**Greg Rieker** Co-Founder and Chief Scientist

**Caroline R. Alden** Co-Founder and Chief Engineer *Named on its 2023 Form D*

**Ian Robert Dickinson** Co-Founder and CTO *Named on its 2023 Form D*

**Robert J. Wright** Co-Founder and R&D Manager *Named on its 2023 Form D*

- **Edward J. Weaver** Promoter i
- **Gregory Rieker** Executive Officer, Director, Promoter i
- **Sean R. Coburn** Promoter i

On the board, as filed i *H. Robert Gill* *John Robert Bookout* *Joseph R. Edwards* *Varun R. Babbili*

## Everyone who backed them

[US Department of Energy](https://millionrounds.com/fund/u-s-department-of-energy) Government **1** round

Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=longpath-technologies).

## Quick answers about LongPath Technologies

### Who invested in LongPath Technologies?

LongPath Technologies's investors include US Department of Energy.

### How much has LongPath Technologies raised?

LongPath Technologies has raised $162M across 1 round since 2024.

### When did LongPath Technologies last raise?

LongPath Technologies's most recent round was a Debt of $162M in Oct 2024.

### What was LongPath Technologies's biggest round?

Its most recent round, $162M in Oct 2024, is also its largest on record.

### Who backed LongPath Technologies first?

LongPath Technologies's first round on record, in Oct 2024, was backed by US Department of Energy.

### What stage is LongPath Technologies at?

LongPath Technologies's latest named round is a Debt, in Oct 2024.

### Where is LongPath Technologies based?

LongPath Technologies is based in the United States.

## Companies like LongPath Technologies

In the same sector, and raised in the last eighteen months.

[**Apex** $1.1B · Oct 2026](https://millionrounds.com/company/apex)[**ZwitterCo** $58M · Oct 2026](https://millionrounds.com/company/zwitterco)[**Peak Energy** $163M · Oct 2026](https://millionrounds.com/company/peak-energy)[**Arda** $233M · Oct 2026](https://millionrounds.com/company/arda)[**Origin** $121M · Oct 2026](https://millionrounds.com/company/origin)[**Jeevy Fabrication** Oct 2026](https://millionrounds.com/company/jeevy-fabrication)

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