United States · Series B startup

Who invested in KAI Pharmaceuticals

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.

Funding summaryUpdated 26 Oct 2026

$52Mraised across 2 rounds since 2003, from 2 sources

$17MSeries A$35MSeries B
Latest round
Series B, $35MMay 2006
Step-upi
2.1×
Investors
7
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.

200420052006
$17MSeries A$35MSeries B
First round
Series A, $17M
Dec 2003
Biggest round
$35M
Series B · May 2006
Between rounds
2.4 years
from the last two

The rounds

  1. May 2006
  2. Dec 2003
    Series A$17M4 new

    From a historical funding record

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.

The exit

ExitBuyerPriceWhen
AcquiredAmgen$315MApr 2012

From historical deal records. Wrong? Tell us.

Everyone who backed them

InterWest PartnersVC firm2rounds
Intersouth PartnersVC firm2rounds
Delphi VenturesVC firm2rounds
Skyline VenturesVC firm2rounds
Investor ABVC firm1round
Aberdare VenturesVC firm1round
MDS CapitalGrowth equity1round

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

Quick answers about KAI Pharmaceuticals

Who invested in KAI Pharmaceuticals?

KAI Pharmaceuticals's investors include InterWest Partners, Intersouth Partners, Delphi Ventures, Skyline Ventures and Investor AB, and 2 more on record.

How much has KAI Pharmaceuticals raised?

KAI Pharmaceuticals has raised $52M across 2 rounds since 2003.

When did KAI Pharmaceuticals last raise?

KAI Pharmaceuticals's most recent round was a Series B of $35M in May 2006.

What was KAI Pharmaceuticals's biggest round?

Its most recent round, $35M in May 2006, is also its largest on record.

Who backed KAI Pharmaceuticals first?

KAI Pharmaceuticals's first round on record, in Dec 2003, was backed by InterWest Partners, Intersouth Partners and Delphi Ventures and 1 others.

What stage is KAI Pharmaceuticals at?

KAI Pharmaceuticals's latest named round is a Series B, in May 2006.

Where is KAI Pharmaceuticals based?

KAI Pharmaceuticals is based in the United States.

Find investors like these

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