# Apton Biosystems funding: rounds and investors

> Apton Biosystems has raised $25M across 1 round since 2021. Investors include Khosla Ventures and Casdin Capital. Every round with its source.

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

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

# Who invested in *Apton Biosystems*

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.

Biotech

Funding summary Updated 26 Oct 2026

**$25M** raised across 1 round since 2021, from 1 source

- **Latest round:** Series A, $25M Apr 2021
- **Investors:** 2

See who backed them

## The rounds

- **Apr 2021** Series A **$25M** [Khosla Ventures](https://millionrounds.com/fund/khosla-ventures) [Casdin Capital](https://millionrounds.com/fund/casdin-capital) Source recorded SEC filing: $25M sold, first sale Apr 2021

## Founders and team

From Apton Biosystems's own website: 3 on the team.

- **Mark Van Oene** President & Chief Executive Officer
- **Jim Gibson** Chief Financial Officer
- **Natalie Welch** Chief People Officer

## Everyone who backed them

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

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

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

## Quick answers about Apton Biosystems

### Who invested in Apton Biosystems?

Apton Biosystems's investors include Khosla Ventures and Casdin Capital.

### How much has Apton Biosystems raised?

Apton Biosystems has raised $25M across 1 round since 2021.

### When did Apton Biosystems last raise?

Apton Biosystems's most recent round was a Series A of $25M in Apr 2021.

### What was Apton Biosystems's biggest round?

Its most recent round, $25M in Apr 2021, is also its largest on record.

### Who backed Apton Biosystems first?

Apton Biosystems's first round on record, in Apr 2021, was backed by Khosla Ventures and Casdin Capital.

### What stage is Apton Biosystems at?

Apton Biosystems's latest named round is a Series A, in Apr 2021.

## Companies like Apton Biosystems

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

[**Cloverleaf Bio** $33M · Sept 2026](https://millionrounds.com/company/cloverleaf-bio)[**Cheiron** $8.0M · Jul 2026](https://millionrounds.com/company/cheiron)[**Tavo Biotherapeutics** $17M · Jun 2026](https://millionrounds.com/company/tavo-biotherapeutics)[**Countable Labs** $26M · May 2026](https://millionrounds.com/company/countable-labs)[**Oricell Therapeutics** $180M · Apr 2026](https://millionrounds.com/company/oricell-therapeutics)[**Immunofoco** $29M · Mar 2026](https://millionrounds.com/company/immunofoco)

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