# F4 funding: rounds and investors

> F4 has raised $500K across 1 round since 2025. Investors include Y Combinator. Every round with its source.

Source: https://millionrounds.com/company/f4 (Millionrounds; every figure on the page links to its filing or article)

United States · [Pre-seed startup](https://millionrounds.com/companies)

# Who invested in *F4*

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.

Manufacturing

Funding summary Updated 26 Oct 2026

**$500K** raised across 1 round since 2025, from 1 source

- **Latest round:** Pre-seed, $500K Sept 2025
- **Investors:** 1

See who backed them

## The rounds

- **Sept 2025** Pre-seed **$500K** [Y Combinator](https://millionrounds.com/fund/y-combinator) Source recorded

## Everyone who backed them

[Y Combinator](https://millionrounds.com/fund/y-combinator) Accelerator **1** round

Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=f4).

## Quick answers about F4

### Who invested in F4?

F4's investors include Y Combinator.

### How much has F4 raised?

F4 has raised $500K across 1 round since 2025.

### When did F4 last raise?

F4's most recent round was a Pre-seed of $500K in Sept 2025.

### What was F4's biggest round?

Its most recent round, $500K in Sept 2025, is also its largest on record.

### Who backed F4 first?

F4's first round on record, in Sept 2025, was backed by Y Combinator.

### What stage is F4 at?

F4's latest named round is a Pre-seed, in Sept 2025.

### Where is F4 based?

F4 is based in the United States.

## Companies like F4

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

[**Apex** $1.1B · Oct 2026](https://millionrounds.com/company/apex)[**ZwitterCo** $58M · Oct 2026](https://millionrounds.com/company/zwitterco)[**Peak Energy** $163M · Oct 2026](https://millionrounds.com/company/peak-energy)[**Arda** $233M · Oct 2026](https://millionrounds.com/company/arda)[**Origin** $121M · Oct 2026](https://millionrounds.com/company/origin)[**Jeevy Fabrication** Oct 2026](https://millionrounds.com/company/jeevy-fabrication)

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