Who invested in Sesen Bio?
Sesen Bio's investors include JAFCO and Flagship Pioneering.
Who invested in Sesen Bio
One round we have observed, with the 2 investors named in it. 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
$40Mraised across 1 round since 2018, from 1 source
- Latest round
- Round, $40MJun 2018
- Investors
- 2
The rounds
- Jun 2018
Everyone who backed them
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Quick answers about Sesen Bio
How much has Sesen Bio raised?
Sesen Bio has raised $40M across 1 round since 2018.
When did Sesen Bio last raise?
Sesen Bio's most recent round was an Undisclosed round of $40M in Jun 2018.
What was Sesen Bio's biggest round?
Its most recent round, $40M in Jun 2018, is also its largest on record.
Who backed Sesen Bio first?
Sesen Bio's first round on record, in Jun 2018, was backed by JAFCO and Flagship Pioneering.
What stage is Sesen Bio at?
Sesen Bio's latest named round is an Undisclosed round, in Jun 2018.
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