# Ostrom funding: rounds and investors

> Ostrom has raised $23M across 1 round since 2025. Investors include Global Founders Capital, Union Square Ventures and 468 Capital. Every round with its source.

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

Germany · [Series B startup](https://millionrounds.com/companies)

# Who invested in *Ostrom*

One round we have observed, with the 4 investors 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.

Cleantech

Funding summary Updated 26 Oct 2026

**$23M** raised across 1 round since 2025, from 1 source

- **Latest round:** Series B, $23M Jun 2025
- **Investors:** 4

See who backed them

## The rounds

- **Jun 2025** Series B **$23M** [Global Founders Capital](https://millionrounds.com/fund/global-founders-capital) [Union Square Ventures](https://millionrounds.com/fund/union-square-ventures) [468 Capital](https://millionrounds.com/fund/468-capital) [J12 Ventures](https://millionrounds.com/fund/j12) Source recorded

## Everyone who backed them

[Global Founders Capital](https://millionrounds.com/fund/global-founders-capital) VC firm **1** round

[Union Square Ventures](https://millionrounds.com/fund/union-square-ventures) VC firm **1** round

[468 Capital](https://millionrounds.com/fund/468-capital) VC firm **1** round

[J12 Ventures](https://millionrounds.com/fund/j12) VC firm **1** round

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

## Also claim to have backed them

These 2 firms list Ostrom as a portfolio company on their own websites, but no report of a round names them. They are the firms' own claims, kept apart from the rounds above.

[Friedrich A. Neuman](https://millionrounds.com/fund/friedrich-a-neuman) VC firm Per its own site

[Klaradal](https://millionrounds.com/fund/klaradal) Family office 2021, per its site

## Quick answers about Ostrom

### Who invested in Ostrom?

Ostrom's investors include Global Founders Capital, Union Square Ventures, 468 Capital and J12 Ventures.

### How much has Ostrom raised?

Ostrom has raised $23M across 1 round since 2025.

### When did Ostrom last raise?

Ostrom's most recent round was a Series B of $23M in Jun 2025.

### What was Ostrom's biggest round?

Its most recent round, $23M in Jun 2025, is also its largest on record.

### Who backed Ostrom first?

Ostrom's first round on record, in Jun 2025, was backed by Global Founders Capital, Union Square Ventures and 468 Capital and 1 others.

### What stage is Ostrom at?

Ostrom's latest named round is a Series B, in Jun 2025.

### Where is Ostrom based?

Ostrom is based in Germany.

## Companies like Ostrom

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

[**Rabot Energy** $50M · Oct 2026](https://millionrounds.com/company/rabot-energy)[**Proxima Fusion** $636M · Jul 2026](https://millionrounds.com/company/proxima-fusion)[**Focused Energy** $280M · Jun 2026](https://millionrounds.com/company/focused-energy)[**VREY** $3.9M · Apr 2026](https://millionrounds.com/company/vrey)[**ILOS Projects** $530M · Apr 2026](https://millionrounds.com/company/ilos-projects)[**HeyCharge** $3.0M · Feb 2026](https://millionrounds.com/company/heycharge)

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