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Firefly Bio

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South San Francisco, United StatesFounded 2022Biotech & Life Sciences
Valuation $1–2.5B Last recorded · 2026
Headcount <100 Current team size
Total funding $50–100M Disclosed equity funding
Unlock exact values This page shows ranges. Dealroom has the exact numbers for Firefly Bio and the history behind them.

About Firefly Bio

Firefly Biologics is a venture-backed company based in the Bay Area, currently operating in stealth mode. The company focuses on developing innovative bioconjugate solutions, which are advanced techniques that combine biological molecules with other compounds to enhance their effectiveness in medical treatments. Firefly Biologics aims to revolutionize the field of medicine by realizing the full potential of bioconjugates, making treatments more effective and targeted.

The company primarily serves the biotechnology and pharmaceutical sectors, targeting clients who are looking for cutting-edge solutions to improve their medical products. Operating in the highly competitive and rapidly evolving biotech market, Firefly Biologics leverages its advanced research and development capabilities to stay ahead.

Firefly Biologics' business model revolves around research and development, intellectual property licensing, and strategic partnerships. The company generates revenue through licensing its bioconjugate technologies to pharmaceutical companies and forming partnerships for co-development of new medical treatments. By focusing on innovation and collaboration, Firefly Biologics aims to create significant value for its stakeholders.

Source: Dealroom company data

At a glance

Status
Acquired
Founded
2022
Headquarters
South San Francisco, United States
Employees
25
Open positions
None listed
Dealroom signal
62.4/100
Industry
Health
Sub-industry
BioTechnology
Sector
Biotech & Life Sciences, Biotechnology, Antibodies, Spinout, Verified Unicorns and $1B Exits, Biotech and Pharma, Antibody-Drug Conjugate, Woman Founder, DT and LS, science-based
Business model
Manufacturing
Client focus
b2b

Funding history

3 recorded events

Company financing events and reported valuations.

Deal typeDateAmountValuationInvestorsSource
ACQUISITIONOther financing Jun 2026 $1B $1B Johnson & Johnson ↗
SERIES AOther financing Feb 2024 $94M $376M Eli Lilly · MPM BioImpact · Versant Ventures · Decheng Capital ↗
Showing the latest 2 of 3 recorded eventsBook a demo for the full funding history →

Growth signals

Firefly Bio website traffic

Latest recorded traffic for Firefly Bio is 1.5K monthly website visits, up 54.6% over the last three months. Firefly Bio's team declined 3.8% over the past year.

Latest monthly visits1.5K 3-month web change+54.6% 1-year team growth-3.8%
Summary metrics are public; monthly history is available with a demoCompare with peers →

Investments and acquisitions

Capital deployed

Recent portfolio relationships for companies that also act as investors or acquirers.

Investors

6 investors on the cap table

From Dealroom's funding and investor records, grouped by the round each investor first entered.

Series A4 investors entered at this stage

Other known investors2 additional known investors

  • Johnson & Johnson
  • Stanford University
Team profiled 5 named & role-tagged
Founders Hidden — book a demo/100 quality score
Key operators 2 quality Hidden — book a demo/100
Potential founders Hidden — book a demo likely future founders
Startup mafia Hidden — book a demo alumni-founded startups
Talent movements Hidden — book a demo in · Hidden — book a demo out past 12 months

Source: Dealroom Talent Intelligence.

Global footprint

Workforce and web traffic by country
Workforce by country
3 countries with
team presence
🇺🇸 United States88.9%
🇦🇺 Australia5.6%
🇨🇦 Canada5.6%
3 countries shown

Market sentiment

Posts on X, past 7 days

An AI-synthesised read of the highest-engagement posts about Firefly Bio on X, ranked by likes and reposts, corporate channels excluded.

Reading the room on X — pulling top posts and synthesizing themes…

Source: X recent search ranked by engagement (likes + retweets) · Synthesis by Claude · Cached for 1 hour

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