# Plexium funding: rounds and investors

> Plexium has raised $88M across 2 rounds since 2019. Investors include DCVC, CRV and The Column Group. Every round with its source.

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

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

# Who invested in *Plexium*

2 rounds we have observed, with the 11 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

Funding summary Updated 26 Oct 2026

**$88M** raised across 2 rounds since 2019, from 2 sources

**$28M** Series A **$60M** Series C

- **Latest round:** Series C, $60M Aug 2025
- **Step-up i:** 2.1×
- **Investors:** 11 (2 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.

2020 2021 2022 2023 2024 2025

**$28M** Series A

**$60M** Series C

- **First round:** Series A, $28M
- **Biggest round:** $60M
- **Between rounds:** 5.8 years

## The rounds

- **Aug 2025** Series C **$60M** *6 new* *2 returning* [CRV](https://millionrounds.com/fund/crv) [Lux Capital](https://millionrounds.com/fund/lux-capital) [DCVC](https://millionrounds.com/fund/data-collective) [RA Capital Management](https://millionrounds.com/fund/ra-capital-management) [SoftBank](https://millionrounds.com/fund/softbank-2) [SoftBank Vision Fund](https://millionrounds.com/fund/softbank-investment-advisers) [TCG](https://millionrounds.com/fund/tcg) [TCG Crossover](https://millionrounds.com/fund/tcg-crossover) Source recorded SEC filing: $60M sold, first sale Jul 2025
- **Oct 2019** Series A **$28M** *5 new* [DCVC](https://millionrounds.com/fund/data-collective) Lead [The Column Group](https://millionrounds.com/fund/the-column-group) Lead [CRV](https://millionrounds.com/fund/crv) [Neotribe Ventures](https://millionrounds.com/fund/neotribe-ventures) [M/VENTURES](https://millionrounds.com/fund/m-ventures-6) Reported by Plexium

## Founders and team

From Plexium's own website: 3 on the team.

- **Stephen Mullennix** Chief Financial Officer
- **Mike Grey** Executive Chairman, Plexium
- **Patrick Rivers** Portfolio Manager, aMoon

## 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 A** 2019 **Series C** 2025 [DCVC](https://millionrounds.com/fund/data-collective) L [CRV](https://millionrounds.com/fund/crv) [The Column Group](https://millionrounds.com/fund/the-column-group) L [Lux Capital](https://millionrounds.com/fund/lux-capital) [RA Capital Management](https://millionrounds.com/fund/ra-capital-management) [SoftBank](https://millionrounds.com/fund/softbank-2) [SoftBank Vision Fund](https://millionrounds.com/fund/softbank-investment-advisers) [TCG](https://millionrounds.com/fund/tcg) [TCG Crossover](https://millionrounds.com/fund/tcg-crossover) [Neotribe Ventures](https://millionrounds.com/fund/neotribe-ventures)

## Everyone who backed them

[DCVC](https://millionrounds.com/fund/data-collective) VC firm **2** rounds, led 1

[CRV](https://millionrounds.com/fund/crv) VC firm **2** rounds

[The Column Group](https://millionrounds.com/fund/the-column-group) VC firm **1** round, led 1

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

[RA Capital Management](https://millionrounds.com/fund/ra-capital-management) Private equity **1** round

[SoftBank](https://millionrounds.com/fund/softbank-2) Investment firm **1** round

[SoftBank Vision Fund](https://millionrounds.com/fund/softbank-investment-advisers) VC firm **1** round

[TCG](https://millionrounds.com/fund/tcg) Private equity **1** round

[TCG Crossover](https://millionrounds.com/fund/tcg-crossover) VC firm **1** round

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

[M/VENTURES](https://millionrounds.com/fund/m-ventures-6) VC firm **1** round

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

## Quick answers about Plexium

### Who invested in Plexium?

Plexium's investors include DCVC, CRV, The Column Group, Lux Capital and RA Capital Management, and 6 more on record.

### How much has Plexium raised?

Plexium has raised $88M across 2 rounds since 2019.

### When did Plexium last raise?

Plexium's most recent round was a Series C of $60M in Aug 2025.

### What was Plexium's biggest round?

Its most recent round, $60M in Aug 2025, is also its largest on record.

### Who backed Plexium first?

Plexium's first round on record, in Oct 2019, was backed by DCVC, The Column Group and CRV and 2 others.

### What stage is Plexium at?

Plexium's latest named round is a Series C, in Aug 2025.

### Where is Plexium based?

Plexium is based in the United States.

### Who led Plexium's rounds?

DCVC led the Series A in 2019.

## Companies like Plexium

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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