# Tethis funding: rounds and investors

> Tethis has raised $19M across 3 rounds since 2013. Investors include Blue Hill Group. Every round with its source.

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

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

# Who invested in *Tethis*

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.

Cleantech

Funding summary Updated 26 Oct 2026

**$19M** raised across 3 rounds since 2013, from 3 sources

**$775K** Seed **$431K** Debt **$18M** Series C

- **Latest round:** Series C, $18M Feb 2018
- **Led by:** Blue Hill Group
- **Step-up i:** 40.9×
- **Investors:** 1 (1 led)

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.

2013 2014 2015 2016 2017 2018

**$775K** Seed

**$431K** Debt

**$18M** Series C

- **First round:** Seed, $775K
- **Biggest round:** $18M
- **Usual gap between rounds:** 3.9 years

## The rounds

- **Feb 2018** Series C **$18M** *1 new* [Blue Hill Group](https://millionrounds.com/fund/blue-hill-group) Lead Reported by Prnewswire SEC filing: $3.9M sold, first sale Jan 2018
- **Mar 2014** Debt **$431K** No investor was named in the report. From a historical funding record SEC filing: $431K sold, first sale Feb 2014
- **Feb 2013** Seed **$775K** No investor was named in the report. Reported by sec.gov SEC filing: $775K sold, first sale Jan 2013

## Everyone who backed them

[Blue Hill Group](https://millionrounds.com/fund/blue-hill-group) VC firm **1** round, led 1

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

## Quick answers about Tethis

### Who invested in Tethis?

Tethis's investors include Blue Hill Group. Blue Hill Group led its latest round.

### How much has Tethis raised?

Tethis has raised $19M across 3 rounds since 2013.

### When did Tethis last raise?

Tethis's most recent round was a Series C of $18M in Feb 2018, led by Blue Hill Group.

### What was Tethis's biggest round?

Its most recent round, $18M in Feb 2018, is also its largest on record.

### Who backed Tethis first?

Tethis's first round on record, in Feb 2018, was backed by Blue Hill Group.

### What stage is Tethis at?

Tethis's latest named round is a Series C, in Feb 2018.

### Where is Tethis based?

Tethis is based in the United States.

### Who led Tethis's rounds?

Blue Hill Group led the Series C in 2018.

## Companies like Tethis

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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