# Stonewater funding: rounds and investors

> Stonewater has raised $103M across 1 round since 2025. Investors include Sumitomo Mitsui Banking Corporation. Every round with its source.

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

United Kingdom · [Funded startup](https://millionrounds.com/companies)

# Who invested in *Stonewater*

One round we have observed, with the one investor 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.

Nonprofit

Funding summary Updated 26 Oct 2026

**$103M** raised across 1 round since 2025, from 1 source

- **Latest round:** Debt, $103M Jul 2025
- **Investors:** 1

See who backed them

## The rounds

- **Jul 2025** Debt **$103M** [Sumitomo Mitsui Banking Corporation](https://millionrounds.com/fund/sumitomo-mitsui-banking-corporation) Source recorded

## Everyone who backed them

[Sumitomo Mitsui Banking Corporation](https://millionrounds.com/fund/sumitomo-mitsui-banking-corporation) VC firm **1** round

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

## Quick answers about Stonewater

### Who invested in Stonewater?

Stonewater's investors include Sumitomo Mitsui Banking Corporation.

### How much has Stonewater raised?

Stonewater has raised $103M across 1 round since 2025.

### When did Stonewater last raise?

Stonewater's most recent round was a Debt of $103M in Jul 2025.

### What was Stonewater's biggest round?

Its most recent round, $103M in Jul 2025, is also its largest on record.

### Who backed Stonewater first?

Stonewater's first round on record, in Jul 2025, was backed by Sumitomo Mitsui Banking Corporation.

### What stage is Stonewater at?

Stonewater's latest named round is a Debt, in Jul 2025.

### Where is Stonewater based?

Stonewater is based in the United Kingdom.

## Companies like Stonewater

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

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