# Maritime Fusion funding: rounds and investors

> Maritime Fusion has raised $4.5M across 1 round since 2025. Investors include Y Combinator and Alumni Ventures. Every round with its source.

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

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

# Who invested in *Maritime Fusion*

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.

Energy

Raised 12 months ago

Funding summary Updated 26 Oct 2026

**$4.5M** raised across 1 round since 2025, from 1 source

- **Latest round:** Seed, $4.5M Nov 2025
- **Investors:** 2

See who backed them

## The rounds

- **Nov 2025** Seed **$4.5M** [Y Combinator](https://millionrounds.com/fund/y-combinator) [Alumni Ventures](https://millionrounds.com/fund/us-strategic-tech-fund-an-alumni-ventures-fund) Source recorded

## Everyone who backed them

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

[Alumni Ventures](https://millionrounds.com/fund/us-strategic-tech-fund-an-alumni-ventures-fund) VC firm **1** round

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

## Also claim to have backed them

This firm lists Maritime Fusion 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.

[Trucks Venture Capital](https://millionrounds.com/fund/trucks-venture-capital) VC firm Per its own site

## Quick answers about Maritime Fusion

### Who invested in Maritime Fusion?

Maritime Fusion's investors include Y Combinator and Alumni Ventures.

### How much has Maritime Fusion raised?

Maritime Fusion has raised $4.5M across 1 round since 2025.

### When did Maritime Fusion last raise?

Maritime Fusion's most recent round was a Seed of $4.5M in Nov 2025.

### What was Maritime Fusion's biggest round?

Its most recent round, $4.5M in Nov 2025, is also its largest on record.

### Who backed Maritime Fusion first?

Maritime Fusion's first round on record, in Nov 2025, was backed by Y Combinator and Alumni Ventures.

### What stage is Maritime Fusion at?

Maritime Fusion's latest named round is a Seed, in Nov 2025.

### Where is Maritime Fusion based?

Maritime Fusion is based in the United States.

## Companies like Maritime Fusion

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

[**Amogy** $125M · Oct 2026](https://millionrounds.com/company/amogy)[**LanzaJet** $67M · Oct 2026](https://millionrounds.com/company/lanzajet)[**Pivot Energy** $500M · Oct 2026](https://millionrounds.com/company/pivot-energy)[**Peak Energy** $163M · Oct 2026](https://millionrounds.com/company/peak-energy)[**Pennsylvania American Water** $43M · Oct 2026](https://millionrounds.com/company/pennsylvania-american-water)[**Vertical Semiconductor** $84M · Oct 2026](https://millionrounds.com/company/vertical-semiconductor)

## Find investors like these

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