United States · Series A startup

Who invested in Fesarius Therapeutics

2 rounds we have observed, with the 7 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

Raised 5 months ago

Funding summaryUpdated 26 Oct 2026

$21Mraised across 2 rounds since 2023, from 3 sources

$800KGrant$20MSeries A
Latest round
Series A, $20MJun 2026
Led by
Jefferson Life Sciences
Step-upi
25×
Investors
7 (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.

202420252026
$800KGrant$20MSeries A
First round
Grant, $800K
Aug 2023
Biggest round
$20M
Series A · Jun 2026
Between rounds
2.8 years
from the last two

The rounds

  1. Jun 2026
  2. Aug 2023

Founders and team

From Fesarius Therapeutics's own website: 1 founder, 4 on the team.

Hannah NguyenFounder & CEO
  • Tom RouechePresident & CEO, Director
  • Tim O'BrienVP Sales & Marketing
  • David W. AndersonDirector
  • William G. MavityDirector

AdvisersDr. Jason Spector

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.

Everyone who backed them

New York VenturesVC firm2rounds
Jefferson Life SciencesFamily office1round, led 1
SurgeAccelerator1round
NY VenturesVC firm1round

Missing a round, or an investor who was in one? Tell us.

Quick answers about Fesarius Therapeutics

Who invested in Fesarius Therapeutics?

Fesarius Therapeutics's investors include National Institutes of Health, New York Ventures, Jefferson Life Sciences, Surge and Johnson & Johnson Robotics and Digital Solutions, and 2 more on record. Jefferson Life Sciences led its latest round.

How much has Fesarius Therapeutics raised?

Fesarius Therapeutics has raised $21M across 2 rounds since 2023.

When did Fesarius Therapeutics last raise?

Fesarius Therapeutics's most recent round was a Series A of $20M in Jun 2026, led by Jefferson Life Sciences.

What was Fesarius Therapeutics's biggest round?

Its most recent round, $20M in Jun 2026, is also its largest on record.

Who backed Fesarius Therapeutics first?

Fesarius Therapeutics's first round on record, in Aug 2023, was backed by National Institutes of Health and New York Ventures.

What stage is Fesarius Therapeutics at?

Fesarius Therapeutics's latest named round is a Series A, in Jun 2026.

Where is Fesarius Therapeutics based?

Fesarius Therapeutics is based in the United States.

Who led Fesarius Therapeutics's rounds?

Jefferson Life Sciences led the Series A in 2026.

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