United States · Funded startup

Who invested in FirstString

2 rounds we have observed, with the 2 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.

BiotechHealthcare

Funding summaryUpdated 26 Oct 2026

$15Mraised across 2 rounds since 2008, from 2 sources

$200KSeed$15MRound
Latest round
Round, $15MJan 2018
Step-upi
75×
Investors
2
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.

200820102012201420162018
$200KSeed$15MRound
First round
Seed, $200K
Mar 2008
Biggest round
$15M
Round · Jan 2018
Between rounds
9.9 years
from the last two

The rounds

  1. Jan 2018
    Round$15M2 new
    • Park West
    • Sophos Capital

    Reported by Postandcourier

  2. Mar 2008
    Seed$200K

    No investor was named in the report.

    Reported by tradingmarkets.com

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.

Seed2008Round2018Park WestSophos Capital

Everyone who backed them

Park Westno record of our own yet1round
Sophos Capitalno record of our own yet1round

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

Quick answers about FirstString

Who invested in FirstString?

FirstString's investors include Park West and Sophos Capital.

How much has FirstString raised?

FirstString has raised $15M across 2 rounds since 2008.

When did FirstString last raise?

FirstString's most recent round was an Undisclosed round of $15M in Jan 2018.

What was FirstString's biggest round?

Its most recent round, $15M in Jan 2018, is also its largest on record.

Who backed FirstString first?

FirstString's first round on record, in Jan 2018, was backed by Park West and Sophos Capital.

What stage is FirstString at?

FirstString's latest named round is an Undisclosed round, in Jan 2018.

Where is FirstString based?

FirstString is based in the United States.

Companies like FirstString

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

Find investors like these

Search every investor by what they have actually funded, then narrow to your stage and market. Free.