# M2X Energy funding: rounds and investors

> M2X Energy has raised $185M across 3 rounds since 2024. Investors include Breakthrough Energy. Every round with its source.

Source: https://millionrounds.com/company/m2x-energy (Millionrounds; every figure on the page links to its filing or article)

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

# Who invested in *M2X Energy*

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

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Engineering

Raised 1 month ago

Funding summary Updated 27 Oct 2026

**$185M** raised across 3 rounds since 2024, from 3 sources

**$40M** Series B **$20M** Venture **$125M** Round

- **Latest round:** Round, $125M Oct 2026
- **Step-up i:** 6.2×
- **Investors:** 1

See who backed them

## The funding story

Each circle is a round, placed by date and sized by amount. The line above is the running total.

2025 2026

**$40M** Series B

**$20M** Venture

**$125M** Round

- **First round:** Series B, $40M
- **Biggest round:** $125M
- **Usual gap between rounds:** 21 months

## The rounds

- **Oct 2026** Round **$125M** No investor was named in the report. Filed with the SEC (Form D); no report of this raise yet SEC filing: $125M sold, first sale Oct 2026
- **Mar 2026** Venture **$20M** *1 returning* [Breakthrough Energy](https://millionrounds.com/fund/breakthrough-energy) Source recorded SEC filing: $20M sold, first sale Feb 2026
- **Jun 2024** Series B **$40M** *1 new* [Breakthrough Energy](https://millionrounds.com/fund/breakthrough-energy) Source recorded SEC filing: $20M sold, first sale Jun 2024

## Everyone who backed them

[Breakthrough Energy](https://millionrounds.com/fund/breakthrough-energy) VC firm **2** rounds

Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=m2x-energy).

## Quick answers about M2X Energy

### Who invested in M2X Energy?

M2X Energy's investors include Breakthrough Energy.

### How much has M2X Energy raised?

M2X Energy has raised $185M across 3 rounds since 2024.

### When did M2X Energy last raise?

M2X Energy's most recent round, $125M, was in Oct 2026.

### What was M2X Energy's biggest round?

Its most recent round, $125M in Oct 2026, is also its largest on record.

### Who backed M2X Energy first?

M2X Energy's first round on record, in Jun 2024, was backed by Breakthrough Energy.

### What stage is M2X Energy at?

M2X Energy's latest named round is a Venture, in Mar 2026.

### Where is M2X Energy based?

M2X Energy is based in the United States.

## Companies like M2X Energy

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

[**Simile** $600M · Oct 2026](https://millionrounds.com/company/simile)[**Mach9** $46M · Oct 2026](https://millionrounds.com/company/mach9)[**Applied Intuition** $640M · Oct 2026](https://millionrounds.com/company/applied-intuition)[**Aikido Technologies** $5.7M · Oct 2026](https://millionrounds.com/company/aikido-technologies)[**Cognition** $3.0B · Sept 2026](https://millionrounds.com/company/cognition)[**Thermolic** $500K · Sept 2026](https://millionrounds.com/company/thermolic)

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