United States · Venture startup

Who invested in LumiThera

3 rounds we have observed, with the 3 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

$8.2Mraised across 3 rounds since 2014, from 3 sources

$325KVenture$5.5MSeries B$2.4MVenture

Latest round: Venture, $2.4MMay 2024
Biggest round: $5.5MSeries B · Oct 2017
Investors: 3

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.

201420162018202020222024

$325KVenture$5.5MSeries B$2.4MVenture

First round: Venture, $325K
Biggest round: $5.5M
Usual gap between rounds: 6.5 years

The rounds

May 2024
Venture$2.4M2 new
- Keiretsu Forum
- Keiretsu Capital
Source recordedSEC filing: $2.4M sold, first sale May 2024
Oct 2017
Series B$5.5M1 new
- WaterStone Capital/ RPR
Reported by FinSMEsSEC filing: $5.0M sold, first sale Nov 2016
Aug 2014
Venture$325K
No investor was named in the report.
From a historical funding recordSEC filing: $325K sold, first sale Aug 2014

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.

Venture2014Series B2017Venture2024

Keiretsu Forum

Keiretsu CapitalWaterStone Capital/ RPR

Everyone who backed them

Keiretsu ForumAngel network1round

Keiretsu CapitalVC firm1round

WaterStone Capital/ RPRno record of our own yet1round

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

Also claim to have backed them

This firm lists LumiThera as a portfolio company on their own website, but no report of a round names it. They are the firms' own claims, kept apart from the rounds above.