# Rumin8 funding: rounds and investors

> Rumin8 has raised $3.0M across 1 round since 2026. Investors include AgriZeroNZ, Breakthrough Energy and Airtree Ventures. Every round with its source.

Source: https://millionrounds.com/company/rumin8 (Millionrounds; every figure on the page links to its filing or article)

Australia · [Seed startup](https://millionrounds.com/companies)

# Who invested in *Rumin8*

One round we have observed, with the 3 investors 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.

Agtech Climate Tech

Raised 7 months ago

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Funding summary Updated 5 Nov 2026

**$3.0M** raised across 1 round since 2026, from 1 source

- **Latest round:** Seed, $3.0M Mar 2026
- **Led by:** AgriZeroNZ
- **Investors:** 3 (1 led)

See who backed them

## The rounds

- **Mar 2026** Seed **$3.0M** [AgriZeroNZ](https://millionrounds.com/fund/agrizeronz) Lead [Breakthrough Energy](https://millionrounds.com/fund/breakthrough-energy) [Airtree Ventures](https://millionrounds.com/fund/airtree) Reported by Startup Daily

## Founders and team

From Rumin8's own website: 3 founders, 14 on the team.

**David Messina** Co-founder & CEO

**Matt Callahan** Co-founder and Head of Regulatory

**Dr Stewart Washer** Co-founder & Chairman

- **Darren Hunt** Chief Financial Officer & Company Secretary
- **Dr Caroline Heller** Chief Business Officer
- **Kosta Stavreas** Chief Commercial Officer
- **Mark Heath** Chief Operating Officer
- **Dr Byron Silva** Head of Development – Latin America
- **Dr Robbin Koenig** Head of Research and Development
- **Jeff Osowski** Head of Carbon Go To Market
- **Dr Pablo Alvarez Hess** Global Clinical Trial Lead
- **Dr Peter Turner** Director
- **Dr Silke Jacques** Principal Scientist
- **Mark Cupta** Director
- **Rafaella Mazza** Senior Manager – Carbon Market Strategy
- **Richard Quinlan** Technology Partnerships and Innovation Lead
- **Samantha Tough** Independent Director

Advisers *Dr Edward J. Robb* *Dr Matt Myers* *Matt Callaghan*

## Everyone who backed them

[AgriZeroNZ](https://millionrounds.com/fund/agrizeronz) VC firm **1** round, led 1

[Breakthrough Energy](https://millionrounds.com/fund/breakthrough-energy) VC firm **1** round

[Airtree Ventures](https://millionrounds.com/fund/airtree) VC firm **1** round

Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=rumin8).

## Quick answers about Rumin8

### Who invested in Rumin8?

Rumin8's investors include AgriZeroNZ, Breakthrough Energy and Airtree Ventures. AgriZeroNZ led its latest round.

### How much has Rumin8 raised?

Rumin8 has raised $3.0M across 1 round since 2026.

### When did Rumin8 last raise?

Rumin8's most recent round was a Seed of $3.0M in Mar 2026, led by AgriZeroNZ.

### What was Rumin8's biggest round?

Its most recent round, $3.0M in Mar 2026, is also its largest on record.

### Who backed Rumin8 first?

Rumin8's first round on record, in Mar 2026, was backed by AgriZeroNZ, Breakthrough Energy and Airtree Ventures.

### What stage is Rumin8 at?

Rumin8's latest named round is a Seed, in Mar 2026.

### Where is Rumin8 based?

Rumin8 is based in Australia.

### Who led Rumin8's rounds?

AgriZeroNZ led the Seed in 2026.

## Companies like Rumin8

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

[**Hysata** $146M · Sept 2026](https://millionrounds.com/company/hysata)[**Amber** $148M · Sept 2026](https://millionrounds.com/company/amber)[**Octopusbot** $694K · Jul 2026](https://millionrounds.com/company/octopusbot)[**New Energy Transport** $3.5M · Jun 2026](https://millionrounds.com/company/new-energy-transport)[**Oscorp Energy** $927K · Jun 2026](https://millionrounds.com/company/oscorp-energy)[**Number 8 bio** $12M · Jun 2026](https://millionrounds.com/company/number-8-bio)

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