# Mazama Energy funding: rounds and investors

> Mazama Energy has raised $171M across 2 rounds since 2025. Investors include Khosla Ventures and US Department of Energy. Every round with its source.

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

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

# Who invested in *Mazama Energy*

2 rounds we have observed, with the 2 investors 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.

Cleantech

Raised 2 months ago

Funding summary Updated 26 Oct 2026

**$171M** raised across 2 rounds since 2025, from 2 sources

**$36M** Series A **$135M** Series B

- **Latest round:** Series B, $135M Sept 2026
- **Step-up i:** 3.8×
- **Investors:** 2

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.

2026

**$36M** Series A

**$135M** Series B

- **First round:** Series A, $36M
- **Biggest round:** $135M
- **Between rounds:** 11 months

## The rounds

- **Sept 2026** Series B **$135M** *2 returning* [Khosla Ventures](https://millionrounds.com/fund/khosla-ventures) [US Department of Energy](https://millionrounds.com/fund/u-s-department-of-energy) Source recorded
- **Oct 2025** Series A **$36M** *2 new* [Khosla Ventures](https://millionrounds.com/fund/khosla-ventures) [US Department of Energy](https://millionrounds.com/fund/u-s-department-of-energy) Source recorded

## Who was in which round

The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led.

**Series A** 2025 **Series B** 2026 [Khosla Ventures](https://millionrounds.com/fund/khosla-ventures) [US Department of Energy](https://millionrounds.com/fund/u-s-department-of-energy)

## Everyone who backed them

[Khosla Ventures](https://millionrounds.com/fund/khosla-ventures) VC firm **2** rounds

[US Department of Energy](https://millionrounds.com/fund/u-s-department-of-energy) Government **2** rounds

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

## Quick answers about Mazama Energy

### Who invested in Mazama Energy?

Mazama Energy's investors include Khosla Ventures and US Department of Energy.

### How much has Mazama Energy raised?

Mazama Energy has raised $171M across 2 rounds since 2025.

### When did Mazama Energy last raise?

Mazama Energy's most recent round was a Series B of $135M in Sept 2026.

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

Its most recent round, $135M in Sept 2026, is also its largest on record.

### Who backed Mazama Energy first?

Mazama Energy's first round on record, in Oct 2025, was backed by Khosla Ventures and US Department of Energy.

### What stage is Mazama Energy at?

Mazama Energy's latest named round is a Series B, in Sept 2026.

### Where is Mazama Energy based?

Mazama Energy is based in the United States.

## Companies like Mazama Energy

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

[**Amogy** $125M · Oct 2026](https://millionrounds.com/company/amogy)[**LanzaJet** $67M · Oct 2026](https://millionrounds.com/company/lanzajet)[**Pivot Energy** $500M · Oct 2026](https://millionrounds.com/company/pivot-energy)[**Peak Energy** $163M · Oct 2026](https://millionrounds.com/company/peak-energy)[**Renew** $207M · Oct 2026](https://millionrounds.com/company/renew)[**Optivolt** $37M · Oct 2026](https://millionrounds.com/company/optivolt)

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