# Open Cosmos raises $346M growth round led by ETF Partners

> Open Cosmos, based in United Kingdom, has raised $346M in a growth round led by ETF Partners and Trill Impact, announced on 14 September 2026.

Source: https://millionrounds.com/news/rounds/open-cosmos-growth-round-2026-09 (Millionrounds; every figure on the page links to its filing or article)

Raised **$346M** 4 sources reported it

Stage **Growth** 2 earlier rounds on record

Investors **11** 2 named as lead

Where **GB** United Kingdom

Aerospace & Space Telecoms

## How big is it?

Against every equity round we recorded in the twelve months to 14 September 2026. Ranks count companies, so the same raise reported twice is counted once.

**#159** equity round of the last twelve months

**#62** growth round of 239 in that time

**#10** round in United Kingdom, of 309

This round **$346M**

Median growth round **$120M**

2.9 times the median growth round of the last twelve months.

## Who invested

- [**ETF Partners** 8 rounds in the last twelve months *Led*](https://millionrounds.com/fund/etf-partners-the-environmental-technologies-fund)
- [**Trill Impact** 1 round in the last twelve months *Led*](https://millionrounds.com/fund/trill-impact)

Also in the round

- [Entrepreneur First](https://millionrounds.com/fund/entrepreneurs-first)
- [LocalGlobe](https://millionrounds.com/fund/localglobe)
- [Lightrock](https://millionrounds.com/fund/lightrock)
- [Business Growth Fund](https://millionrounds.com/fund/bgf)
- [Claret Capital Partners](https://millionrounds.com/fund/claret-capital-partners)
- [National Security Strategic Investment Fund (NSSIF)](https://millionrounds.com/fund/national-security-strategic-investment-fund-nssif)
- [British Columbia Investment Management Corporation (BCI)](https://millionrounds.com/fund/british-columbia-investment-management-corporation-bci)
- [Phoenix Court](https://millionrounds.com/fund/phoenix-court)
- [Institut Català de Finances (ICF)](https://millionrounds.com/fund/institut-catala-de-finances-icf)

## Funding history

- September 2026 Growth **$346M**
- September 2023 Series B **$50M**
- April 2018 Series A **$7.0M**

$403M raised across the 3 rounds we hold.

## Reported by

- Firms' own news pages
- ETF Partners 14 September
- Tech.eu 14 September
- Claret Capital Partners 14 September

The round's figures come from these reports; each link opens the original.

## Other big rounds that week

[D **D-Robotics** $400M Series C](https://millionrounds.com/news/rounds/d-robotics-series-c-2026-09)[**Impulse Space** $308M Series D](https://millionrounds.com/news/rounds/impulse-space-series-d-2026-09)[**barq** $330M Series A](https://millionrounds.com/news/rounds/barq-series-a-2026-09)[**Exein** $270M Growth](https://millionrounds.com/news/rounds/exein-growth-round-2026-09)[**EUCLYD** $231M Series A](https://millionrounds.com/news/rounds/euclyd-series-a-2026-09)[**Factory** $200M Growth](https://millionrounds.com/news/rounds/factory-growth-round-2026-09)

[The company **Open Cosmos on Millionrounds** *→*](https://millionrounds.com/company/open-cosmos)[Weekly roundup **Week of 14 September** *→*](https://millionrounds.com/news/weekly/2026-09-14)[Monthly roundup **September 2026** *→*](https://millionrounds.com/news/monthly/2026-09)

**How this article is made**

We write one for every equity round of $100M or more that at least two sources reported. It is put together from our record of rounds, not rewritten from the reports: the ranks and medians count every equity round we read in the twelve months to the round's date. [How we read rounds](https://millionrounds.com/methodology) · [Report a mistake](https://millionrounds.com/corrections)