Who has invested in Zag Bio?

Polaris Partners are named among the investors backing Zag Bio.

Zag Bio Funding: $80M Raised, Series A (2025)

Zag Bio funding overview

Zag Bio is a Biotech company based in Cambridge, MA. Zag Bio has raised $80M in total disclosed funding. That places its disclosed total in the $25M–$100M range. Its most recent disclosed round is a Series A announced in October 2025. The round record for Zag Bio runs through 2025; nothing later has been disclosed. Investors on record include Polaris Partners.

Zag Bio at a glance

Total raised: $80M
Latest round: Series A
Latest round date: October 2025
Industry: Biotech
Headquarters: Cambridge, MA
Notable investors: Polaris Partners

Frequently asked about Zag Bio funding

How much has Zag Bio raised?: Zag Bio has raised $80M in total disclosed funding across the rounds on record.
Who has invested in Zag Bio?: Polaris Partners are named among the investors backing Zag Bio.
What was the latest Zag Bio funding round?: The most recent disclosed round is a Series A, announced in October 2025.
Where is Zag Bio based?: Zag Bio is based in Cambridge, MA.
What sector does Zag Bio operate in?: Zag Bio is tracked under Biotech from Cambridge, MA, with $80M in disclosed funding.
When did Zag Bio last raise?: The last disclosed Zag Bio round closed in October 2025 at Series A.

Round data for Zag Bio is compiled from public filings and announcements; blank fields mean nothing has been disclosed rather than nothing exists. Continue with the Biotech companies in Cambridge and backer lists below.

Zag Bio Funding: $80M Raised, Series A (2025)

Zag Bio funding overview

Zag Bio at a glance

Frequently asked about Zag Bio funding

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