United States · Venture startup
5 rounds we have observed, with the 6 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
$8.2Mraised across 5 rounds since 2012, from 5 sources
Each circle is a round, placed by date and sized by amount. The line above is the running total.
No investor was named in the report.
From a historical funding recordSEC filing: $2.0M sold, first sale Mar 2015
No investor was named in the report.
From a historical funding recordSEC filing: $527K sold, first sale Jun 2014
From a historical funding record
From a historical funding record
The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led.
Boston Harbor Angels
Maine Angels
Mass Medical AngelsLaunchpad Angels
Desert Angels
Beacon AngelsMissing a round, or an investor who was in one? Tell us.
Siamab Therapeutics's investors include Boston Harbor Angels, Maine Angels, Mass Medical Angels, Launchpad Angels and Desert Angels, and 1 more on record.
Siamab Therapeutics has raised $8.2M across 5 rounds since 2012.
Siamab Therapeutics's most recent round was a Venture of $2.0M in Apr 2015.
Siamab Therapeutics's largest round on record is $2.5M (Series B), in Feb 2014.
Siamab Therapeutics's first round on record, in Feb 2014, was backed by Boston Harbor Angels, Maine Angels and Mass Medical Angels and 3 others.
Siamab Therapeutics's latest named round is a Venture, in Apr 2015.
Siamab Therapeutics is based in the United States.
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United States ·