# Parallel Bio funding: rounds and investors

> Parallel Bio has raised $21M across 1 round since 2025. Investors include Y Combinator, Refactor Capital and Amplo. Every round with its source.

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

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

# Who invested in *Parallel Bio*

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

Y Combinator: S21

Funding summary Updated 26 Oct 2026

**$21M** raised across 1 round since 2025, from 1 source

- **Latest round:** Series A, $21M Jun 2025
- **Investors:** 4

See who backed them

## The rounds

- **Jun 2025** Series A **$21M** [Y Combinator](https://millionrounds.com/fund/y-combinator) [Refactor Capital](https://millionrounds.com/fund/refactor-capital) [Amplo](https://millionrounds.com/fund/amplo) [AIX Ventures](https://millionrounds.com/fund/aix-ventures) Source recorded

## Founders and team

From Parallel Bio's own website: 2 founders, 12 on the team.

**Juliana Hilliard** Co-Founder & Co-CEO

**Robert DiFazio** Co-Founder & Co-CEO

- **Amanda Merkelson** Head of Biobanking
- **Jennifer Lee** VP of Finance and Operations
- **Nate Shapiro** Head of Platform
- **Nathan Bandow** Head of Technical Operations
- **Amr Aly** Senior Software Engineer
- **Belinda Chin** Staff Software Engineer
- **Chris Her** Senior Research Associate
- **Claudio Brun** Operations Manager
- **Fatima Al-Naimi** Research Associate
- **Lanna Avetisyan** Office Manager
- **Teddy Lam** IT & Security Lead
- **Yi-Jang Lin** Senior Scientist

## Everyone who backed them

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

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

[Amplo](https://millionrounds.com/fund/amplo) VC firm **1** round

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

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

## Also claim to have backed them

This firm lists Parallel Bio 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.

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

## Quick answers about Parallel Bio

### Who invested in Parallel Bio?

Parallel Bio's investors include Y Combinator, Refactor Capital, Amplo and AIX Ventures.

### How much has Parallel Bio raised?

Parallel Bio has raised $21M across 1 round since 2025.

### When did Parallel Bio last raise?

Parallel Bio's most recent round was a Series A of $21M in Jun 2025.

### What was Parallel Bio's biggest round?

Its most recent round, $21M in Jun 2025, is also its largest on record.

### Who backed Parallel Bio first?

Parallel Bio's first round on record, in Jun 2025, was backed by Y Combinator, Refactor Capital and Amplo and 1 others.

### What stage is Parallel Bio at?

Parallel Bio's latest named round is a Series A, in Jun 2025.

### Where is Parallel Bio based?

Parallel Bio is based in the United States.

## Companies like Parallel Bio

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

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

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