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ai3Bio raises $48M in Series A funding to advance platforms targeting Th17 cells. The funding will help reset the immune system at its root.

PRIVATESep 29, 2026

Amount Raised

$48 Million

Round Type

Series A

WatertownBiotechnologyHealth Care

Description

ai3Bio has launched with $48 million in Series A funding. This capital will be used to advance their platforms targeting Th17 cells in vivo. The company aims to reset the immune system at its root. The funding marks a significant step for ai3Bio.

Company Information

Company

ai3Bio

Location

Watertown, Massachusetts, United States

About

ai3Bio is a biotechnology company focused on resetting the immune system. The company aims to advance therapeutic platforms targeting Th17 cells in vivo. They have recently launched with significant Series A funding to support their innovative solutions.

Fundz sees it the moment ai3Bio raises, hires an exec or expands, usually minutes after it happens, and tells you who to reach.

Predictive Intelligence
Strategic

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Funding Insights

What this usually means
Typical timeline to Series B
Series A companies typically raise their next round in 10-18 months

ai3Bio raised. Fundz records a round at a median of 3.6 minutes from the SEC filing, with the decision-maker attached.

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Fundz is a real-time business intelligence platform powered by agentic AI that proactively delivers personalized daily signals, including funding rounds, executive changes, M&A activity, 13F institutional filings, SEC 8-K events, investor activity, and website modifications, based on each user's watchlist and ICP. A trusted data source at firms such as BlackRock, Oracle, Kleiner Perkins, LinkedIn, HubSpot, and Cloudflare, Fundz democratizes the institutional-grade intelligence that previously required a PitchBook or Bloomberg terminal. Features include FundzWatch™ for automated website change detection, Daily Briefing for AI-powered daily briefings, and unified cross-signal alerts across 281,000+ organizations. Developers and data teams can access these signals programmatically via the Fundz Funding Data API, with transparent published pricing.