# Ultrasonium funding: rounds and investors

> Ultrasonium has raised across 1 round since 2026. Investors include Y Combinator and Rebel Fund. Every round with its source.

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

United States · [Venture startup](https://millionrounds.com/companies)

# Who invested in *Ultrasonium*

One round we have observed, with the 2 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.

Advanced Manufacturing

Raised 2 months ago

Funding summary Updated 26 Oct 2026

**Undisclosed** raised across 1 round since 2026, from 1 source

- **Latest round:** Venture Sept 2026
- **Investors:** 2

See who backed them

## The rounds

- **Sept 2026** Venture **Amount undisclosed** [Y Combinator](https://millionrounds.com/fund/y-combinator) [Rebel Fund](https://millionrounds.com/fund/rebel-fund) Source recorded

## Founders and team

From Ultrasonium's own website: 4 founders.

**Dr. Jack Qiu** Co-Founder & CEO

**Alexander Urbanski** Co-Founder & Chief Research Officer

**Christopher Carter** Co-Founder & Chief Scientific Officer

**Hunter Brown** Co-Founder & VP of Engineering

## Everyone who backed them

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

[Rebel Fund](https://millionrounds.com/fund/rebel-fund) VC firm **1** round

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

## Also claim to have backed them

This firm lists Ultrasonium 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.

[Glasswing Ventures](https://millionrounds.com/fund/glasswing-ventures) VC firm Per its own site

## Quick answers about Ultrasonium

### Who invested in Ultrasonium?

Ultrasonium's investors include Y Combinator and Rebel Fund.

### How much has Ultrasonium raised?

Ultrasonium has raised 1 round since 2026, none with a disclosed amount.

### When did Ultrasonium last raise?

Ultrasonium's most recent round was a Venture in Sept 2026.

### Who backed Ultrasonium first?

Ultrasonium's first round on record, in Sept 2026, was backed by Y Combinator and Rebel Fund.

### What stage is Ultrasonium at?

Ultrasonium's latest named round is a Venture, in Sept 2026.

### Where is Ultrasonium based?

Ultrasonium is based in the United States.

## Companies like Ultrasonium

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

[**BILT** $272M · Sept 2026](https://millionrounds.com/company/bilt)[**HopFlyt** $2.0M · Sept 2026](https://millionrounds.com/company/hopflyt)[**FluidForm Bio** $1.7M · Aug 2026](https://millionrounds.com/company/fluidform-bio)[**unspun** $42M · Aug 2026](https://millionrounds.com/company/unspun)[**Vntana** $5.3M · Jul 2026](https://millionrounds.com/company/vntana)[**Geomorphic AI** Jul 2026](https://millionrounds.com/company/geomorphic-ai)

## Find investors like these

Search every investor by what they have actually funded, then narrow to your stage and market. Free.

Open the investor searchOr these rounds in the app