# Neuron23 funding: rounds and investors

> Neuron23 has raised $99M across 2 rounds since 2025. Investors include Craft Ventures, Kleiner Perkins and Perceptive Advisors. Every round with its source.

Source: https://millionrounds.com/company/neuron23 (Millionrounds; every figure on the page links to its filing or article)

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

# Who invested in *Neuron23*

2 rounds we have observed, with the 5 investors named in them. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it.

Biotech Healthcare

Raised 5 months ago

Funding summary Updated 26 Oct 2026

**$99M** raised across 2 rounds since 2025, from 2 sources

**$97M** Series D **$2.5M** Grant

- **Latest round:** Grant, $2.5M Jun 2026
- **Biggest round:** $97M Series D · Jun 2025
- **Investors:** 5 (1 led)

See who backed them

## The funding story

Each circle is a round, placed by date and sized by amount. The line above is the running total.

2026

**$97M** Series D

**$2.5M** Grant

- **First round:** Series D, $97M
- **Biggest round:** $97M
- **Between rounds:** 11 months

## The rounds

- **Jun 2026** Grant **$2.5M** *4 new* [Kleiner Perkins](https://millionrounds.com/fund/kleiner-perkins) [Perceptive Advisors](https://millionrounds.com/fund/perceptive-advisors) [Redmile Group](https://millionrounds.com/fund/redmile-group) [Blue Owl](https://millionrounds.com/fund/blue-owl) Source recorded
- **Jun 2025** Series D **$97M** *1 new* [Craft Ventures](https://millionrounds.com/fund/craft-ventures) Lead Reported by TechStartups

## Founders and team

From Neuron23's own website: 4 on the team.

- **Tom DeMelfi** VP, Regulatory Affairs and Quality
- **Amrit Nagpal** Director
- **Karen Lam** SVP, Finance & Corporate Controller
- **Kevin Raidy** Director

## Who was in which round

The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led.

**Series D** 2025 **Grant** 2026 [Craft Ventures](https://millionrounds.com/fund/craft-ventures) L [Kleiner Perkins](https://millionrounds.com/fund/kleiner-perkins) [Perceptive Advisors](https://millionrounds.com/fund/perceptive-advisors) [Redmile Group](https://millionrounds.com/fund/redmile-group) [Blue Owl](https://millionrounds.com/fund/blue-owl)

## Everyone who backed them

[Craft Ventures](https://millionrounds.com/fund/craft-ventures) VC firm **1** round, led 1

[Kleiner Perkins](https://millionrounds.com/fund/kleiner-perkins) VC firm **1** round

[Perceptive Advisors](https://millionrounds.com/fund/perceptive-advisors) Asset manager **1** round

[Redmile Group](https://millionrounds.com/fund/redmile-group) VC firm **1** round

[Blue Owl](https://millionrounds.com/fund/blue-owl) Asset manager **1** round

Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=neuron23).

## Quick answers about Neuron23

### Who invested in Neuron23?

Neuron23's investors include Craft Ventures, Kleiner Perkins, Perceptive Advisors, Redmile Group and Blue Owl.

### How much has Neuron23 raised?

Neuron23 has raised $99M across 2 rounds since 2025.

### When did Neuron23 last raise?

Neuron23's most recent round was a Grant of $2.5M in Jun 2026.

### What was Neuron23's biggest round?

Neuron23's largest round on record is $97M (Series D), in Jun 2025, led by Craft Ventures.

### Who backed Neuron23 first?

Neuron23's first round on record, in Jun 2025, was backed by Craft Ventures.

### What stage is Neuron23 at?

Neuron23's latest named round is a Grant, in Jun 2026.

### Where is Neuron23 based?

Neuron23 is based in the United States.

### Who led Neuron23's rounds?

Craft Ventures led the Series D in 2025.

## Companies like Neuron23

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)[**AI** $18M · Oct 2026](https://millionrounds.com/company/ai)[**Baba** $40M · Oct 2026](https://millionrounds.com/company/baba)[**IMIO** $19M · Oct 2026](https://millionrounds.com/company/imio)

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