# SirenOpt funding: rounds and investors

> SirenOpt has raised $19M across 1 round since 2026. Investors include Berkeley SkyDeck, Hitachi Ventures and Voyager Ventures. Every round with its source.

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

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

# Who invested in *SirenOpt*

One round we have observed, with the 3 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.

Chemicals & Materials

Raised 2 months ago

Funding summary Updated 26 Oct 2026

**$19M** raised across 1 round since 2026, from 1 source

- **Latest round:** Venture, $19M Sept 2026
- **Investors:** 3

See who backed them

## The rounds

- **Sept 2026** Venture **$19M** [Berkeley SkyDeck](https://millionrounds.com/fund/berkeley-skydeck) [Hitachi Ventures](https://millionrounds.com/fund/hitachi-ventures) [Voyager Ventures](https://millionrounds.com/fund/voyager-ventures) Source recorded SEC filing: $19M sold

## Founders and team

From SirenOpt's own website: 3 founders, 7 on the team.

**Jared O'Leary** CEO & Co-Founder

**Jonathan Tan** CEO and co-founder at Coreshell

**Ali Mesbah** SirenOpt Co-founder & CTO

- **Nir BenMoshe** Chief Commercial Officer
- **Steven Kaye** CTO at Voya Energy
- **Connor Hund** Head of Operations and Finance
- **James Carrington** VP Sales and Marketing
- **Parnika Agrawal** Head of Product
- **Matthew Blain** Board Director
- **Phil Harper** Board Director

Advisers *Kenzo Nagai*

## Everyone who backed them

[Berkeley SkyDeck](https://millionrounds.com/fund/berkeley-skydeck) Accelerator **1** round

[Hitachi Ventures](https://millionrounds.com/fund/hitachi-ventures) Corporate VC **1** round

[Voyager Ventures](https://millionrounds.com/fund/voyager-ventures) VC firm **1** round

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

## Also claim to have backed them

These 5 firms list SirenOpt 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.

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

[Visionaries Tomorrow](https://millionrounds.com/fund/visionaries-tomorrow) VC firm Per its own site

[MTM Venture Partners](https://millionrounds.com/fund/mtm-venture-partners) VC firm Per its own site

[Resilient Systems Capital](https://millionrounds.com/fund/resilient-systems-capital) Investment firm Per its own site

[Union Labs](https://millionrounds.com/fund/union-labs) VC firm Per its own site

## Quick answers about SirenOpt

### Who invested in SirenOpt?

SirenOpt's investors include Berkeley SkyDeck, Hitachi Ventures and Voyager Ventures.

### How much has SirenOpt raised?

SirenOpt has raised $19M across 1 round since 2026.

### When did SirenOpt last raise?

SirenOpt's most recent round was a Venture of $19M in Sept 2026.

### What was SirenOpt's biggest round?

Its most recent round, $19M in Sept 2026, is also its largest on record.

### Who backed SirenOpt first?

SirenOpt's first round on record, in Sept 2026, was backed by Berkeley SkyDeck, Hitachi Ventures and Voyager Ventures.

### What stage is SirenOpt at?

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

### Where is SirenOpt based?

SirenOpt is based in the United States.

## Companies like SirenOpt

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

[**Albert Invent** $20M · Oct 2026](https://millionrounds.com/company/albert-invent)[**Albert** $57M · Oct 2026](https://millionrounds.com/company/albert)[**Azulene Labs** $3.4M · Sept 2026](https://millionrounds.com/company/azulene-labs)[**Critical Materials Group** $10M · Sept 2026](https://millionrounds.com/company/critical-materials-group)[**Rise Reforming** $500K · Sept 2026](https://millionrounds.com/company/rise-reforming)[**Fluxnium** $7.0M · Sept 2026](https://millionrounds.com/company/fluxnium)

## 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