# Rational Vaccines funding: rounds and investors

> Rational Vaccines has raised $2.8M across 1 round since 2023. Investors include Founders Fund, National Institutes of Health and Presight Capital.

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

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

# Who invested in *Rational Vaccines*

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.

Biotech

Funding summary Updated 26 Oct 2026

**$2.8M** raised across 1 round since 2023, from 1 source

- **Latest round:** Grant, $2.8M Oct 2023
- **Investors:** 4

See who backed them

## The rounds

- **Oct 2023** Grant **$2.8M** [Founders Fund](https://millionrounds.com/fund/founders-fund) [National Institutes of Health](https://millionrounds.com/fund/national-institutes-of-health) [Presight Capital](https://millionrounds.com/fund/presight-capital) [AAF Management Ltd.](https://millionrounds.com/fund/aaf-management-ltd) Source recorded

## Founders and team

From Rational Vaccines's own website and the SEC filings it signed: 6 on the team.

- **Agustin Fernandez** Chief Executive Officer
- **Olivier Jarry** Chief Financial Officer
- **Konstantin Kousoulas PhD** VP of Scientific Affairs
- **Quinn Steele** Head of GxP and Regulatory E-Systems
- **Brandie Murphy** Lab Manager
- **David Brindley** Executive Officer i

On the board, as filed i *Diane Abbitt* *Jason Camm* *Jeffrey Madden*

## Everyone who backed them

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

[National Institutes of Health](https://millionrounds.com/fund/national-institutes-of-health) Government **1** round

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

[AAF Management Ltd.](https://millionrounds.com/fund/aaf-management-ltd) VC firm **1** round

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

## Quick answers about Rational Vaccines

### Who invested in Rational Vaccines?

Rational Vaccines's investors include Founders Fund, National Institutes of Health, Presight Capital and AAF Management Ltd..

### How much has Rational Vaccines raised?

Rational Vaccines has raised $2.8M across 1 round since 2023.

### When did Rational Vaccines last raise?

Rational Vaccines's most recent round was a Grant of $2.8M in Oct 2023.

### What was Rational Vaccines's biggest round?

Its most recent round, $2.8M in Oct 2023, is also its largest on record.

### Who backed Rational Vaccines first?

Rational Vaccines's first round on record, in Oct 2023, was backed by Founders Fund, National Institutes of Health and Presight Capital and 1 others.

### What stage is Rational Vaccines at?

Rational Vaccines's latest named round is a Grant, in Oct 2023.

### Where is Rational Vaccines based?

Rational Vaccines is based in the United States.

## Companies like Rational Vaccines

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

[**Star Therapeutics** $325M · Oct 2026](https://millionrounds.com/company/star-therapeutics)[**Promaxo** $106M · Oct 2026](https://millionrounds.com/company/promaxo)[**Prolific Machines** $105M · Oct 2026](https://millionrounds.com/company/prolific-machines)[**IMIO** $19M · Oct 2026](https://millionrounds.com/company/imio)[**Clinical Ink** $24M · Oct 2026](https://millionrounds.com/company/clinical-ink)[**Rejuvenate Bio** $13M · Oct 2026](https://millionrounds.com/company/rejuvenate-bio)

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