Rumin8 was founded by David Messina, Dr Stewart Washer, Matt Callahan in 2021.

Who are Rumin8's investors?

Rumin8's investors include Breakthrough Energy Ventures, Prelude Ventures, Starshot.

Where is Rumin8 headquartered?

Rumin8 is headquartered in Western Australia, AU.

Rumin8

Western Australia, AU · Founded 2021 · 30 employees on LinkedIn · 3 known investors

Rumin8 develops feed supplements for ruminant livestock that reduce methane emissions by applying anti-methanogenic solutions derived from nature. The company serves dairy and beef cattle producers seeking to decrease enteric methane from their herds.

AgTech Climate Tech Impact & Social Good

Founders & leadership

Rumin8 was founded in 2021 by David Messina, Dr Stewart Washer, and Matt Callahan.

David MessinainCo-founder & CEO

Dr Stewart WasherinCo-founder & Chairman

Matt CallahaninCo-founder and Head of Regulatory

Investors · 3

Breakthrough Energy VenturesBoston · $500K – $50M

Prelude VenturesSan Francisco · $100K – $5M

StarshotLos Angeles

Funding

SEC filings, press & company announcements

Undisclosed amountSeed roundSep 2024
Source ↗

Source: company announcements and press reports — follow each round's link for the claim.

In the news

Twiggy Forrest-backed emissions agtech Rumin8 raises $4.3 million for Kiwi plans - Startup Dailystartupdaily.net · Mar 2026

effect of Rumin8 Investigational Veterinary Product—a bromoform based feed additive—on enteric methane emissions, animal production parameters, and the rumen environment in feedlot cattle | Translational Animal Science | Oxford Academicacademic.oup.com · Mar 2025

Agtech startup Number 8 Bio swallows $7 million Seed round to cut livestock methane - Startup Dailystartupdaily.net · Sep 2024

Rumin8 raises $12 million for methane-reducing feed additivecen.acs.org · Feb 2023

Rumin8 Raises US$12M Phase 2 Seed Fundingfinsmes.com · Jan 2023

Bill Gates, Twiggy Forrest back livestock emissions reduction startup Rumin8 in $17 million Seed top up - Startup Dailystartupdaily.net · Jan 2023

Frequently asked questions

What does Rumin8 do?: Rumin8 develops feed supplements for ruminant livestock that reduce methane emissions by applying anti-methanogenic solutions derived from nature. The company serves dairy and beef cattle producers seeking to decrease enteric methane from their herds.
Who founded Rumin8?: Rumin8 was founded by David Messina, Dr Stewart Washer, Matt Callahan in 2021.
Who are Rumin8's investors?: Rumin8's investors include Breakthrough Energy Ventures, Prelude Ventures, Starshot.
Where is Rumin8 headquartered?: Rumin8 is headquartered in Western Australia, AU.