# Sigma Lithium funding: rounds and investors

> Sigma Lithium has raised $87M across 3 rounds since 2022. Investors include Citibank and Santander. Every round with its source.

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

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

# Who invested in *Sigma Lithium*

3 rounds we have observed, with the 2 investors 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.

Manufacturing

Funding summary Updated 26 Oct 2026

**$87M** raised across 3 rounds since 2022, from 3 sources

**$229K** Round **$87M** Debt **$339K** Round

- **Latest round:** Round, $339K Jul 2025
- **Biggest round:** $87M Debt · Aug 2024
- **Investors:** 2

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.

2023 2024 2025

**$229K** Round

**$87M** Debt

**$339K** Round

- **First round:** Round, $229K
- **Biggest round:** $87M
- **Usual gap between rounds:** 23 months

## The rounds

- **Jul 2025** Round **$339K** No investor was named in the report. Shares issued, filed with Companies House (SH01); no report of this raise yet
- **Aug 2024** Debt **$87M** *2 new* [Citibank](https://millionrounds.com/fund/citi) [Santander](https://millionrounds.com/fund/santander) Source recorded
- **Sept 2022** Round **$229K** No investor was named in the report. Shares issued, filed with Companies House (SH01); no report of this raise yet

## Funding filed with regulators

Sigma Lithium filed 2 raises, $568K in all. Filings say how much was sold and to how many investors; they never name the investors.

- Jul 2025 **$339K** UK share allotment
- Sept 2022 **$229K** UK share allotment

## Who was in which round

The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led.

**Round** 2022 **Debt** 2024 **Round** 2025 [Citibank](https://millionrounds.com/fund/citi) [Santander](https://millionrounds.com/fund/santander)

## Everyone who backed them

[Citibank](https://millionrounds.com/fund/citi) Growth equity **1** round

[Santander](https://millionrounds.com/fund/santander) VC firm **1** round

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

## Also claim to have backed them

This firm lists Sigma Lithium as a portfolio company on their own website, but no report of a round names it. They are the firms' own claims, kept apart from the rounds above.

[Oxford Innovation Finance](https://millionrounds.com/fund/oxford-innovation-finance) Angel network Per its own site

## Quick answers about Sigma Lithium

### Who invested in Sigma Lithium?

Sigma Lithium's investors include Citibank and Santander.

### How much has Sigma Lithium raised?

Sigma Lithium has raised $87M across 3 rounds since 2022.

### When did Sigma Lithium last raise?

Sigma Lithium's most recent round, $339K, was in Jul 2025.

### What was Sigma Lithium's biggest round?

Sigma Lithium's largest round on record is $87M (Debt), in Aug 2024.

### Who backed Sigma Lithium first?

Sigma Lithium's first round on record, in Aug 2024, was backed by Citibank and Santander.

### What stage is Sigma Lithium at?

Sigma Lithium's latest named round is a Debt, in Aug 2024.

### Where is Sigma Lithium based?

Sigma Lithium is based in the United Kingdom.

## Companies like Sigma Lithium

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

[**HydRegen** $12M · Oct 2026](https://millionrounds.com/company/hydregen)[**Extend Robotics** $4.7M · Oct 2026](https://millionrounds.com/company/extend-robotics)[**Dragonfly Advanced Materials** $2.0M · Sept 2026](https://millionrounds.com/company/dragonfly-advanced-materials)[**AcouBatt** $3.0M · Sept 2026](https://millionrounds.com/company/acoubatt)[**Isometric** $50M · Sept 2026](https://millionrounds.com/company/isometric)[**Rheon Labs** $208M · Sept 2026](https://millionrounds.com/company/rheon-labs)

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