Mammoth Biosciences

Mammoth Biosciences is a biotechnology company focused on leveraging its proprietary ultracompact CRISPR systems to develop long-term curative therapies, as well as other applications such as decentralized precision diagnostics. Founded by CRISPR pioneer and Nobel laureate Jennifer Doudna and Trevor Martin, Janice Chen, and Lucas Harrington, the company's ultracompact proteins are designed to enable in vivo gene editing in difficult to reach tissues utilizing both nuclease applications and new editing modalities beyond double stranded breaks, including base editing, gene writing, and epigenetic editing. The company is building out its pipeline of potential in vivo gene editing therapeutics and capabilities and has partnerships with leading pharmaceutical and biotechnology companies to broaden the reach of its innovative and proprietary technology. Mammoth's deep science and industry experience, along with a robust and differentiated intellectual property portfolio, have enabled the company to further its mission to transform the lives of patients and deliver on the full promise of CRISPR technologies.

Research Brisbane, United States Founded 2017 ~117 employees Private · Series D

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Employees
117
-0.8% in the 3 months to Sep 2026
Revenue / employee
$74.4K
Revenue ~$8.7M
Total funding
$263M
Last round Series D, Sep 2021
12-month attrition
19%
Tech: 19.7%
H1B filings, FY2026
3
Sponsors visas

Headcount trend

Mammoth Biosciences went from 144 employees in Oct 2024 to 117 in Sep 2026. Apr to Sep 2026: 0 people joined, 7 left.

Org structure

Headcount by department

Other78
Operations16
Finance10
Engineering10
HR2
Sales1

Funding

  • Sep 2021 · Series D · $150M · Redmile Group, Foresite Capital, Senator Investment Group
  • Dec 2020 · Series C · $45M · Redmile Group, Foresite Capital, Amazon, Inc.
  • Jul 2020 · National Institutes of Health
  • Jan 2020 · Series B · $45M · Decheng Capital, Mayfield, NFX
  • Dec 2018 · Seed · NFX Bio
  • Jul 2018 · Series A · $23M · Mayfield Fund, Tectonic Capital, 8VC
  • Jun 2017 · Seed · $120K · NFX

Salaries at Mammoth Biosciences

All salaries

1 salary profiles in the US

Pay by level, gender and ethnicity

H-1B sponsorship

H-1B Sponsorship Limited
H-1B Filings by Department
Engineering12
Operations1

The department split adds up all the years listed above. FY2026 alone: 3 filings.

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Mammoth Biosciences FAQ

How many employees does Mammoth Biosciences have?

Mammoth Biosciences has about 117 employees, down 0.8% over the 3 months to Sep 2026.

Does Mammoth Biosciences sponsor H1B visas?

Yes. Mammoth Biosciences filed 3 H1B (LCA) applications in FY2026, according to the latest U.S. Department of Labor disclosures. Most of them were for Engineering roles.

What is Mammoth Biosciences's revenue per employee?

Mammoth Biosciences makes about $74K in revenue per employee, based on $8.7M annual revenue and 117 employees.

How much does Mammoth Biosciences pay?

6figr has 1 salary profile for Mammoth Biosciences in the US, with pay broken down by role, level, gender and ethnicity on the Mammoth Biosciences salaries page. See Mammoth Biosciences salaries

How much funding has Mammoth Biosciences raised?

Mammoth Biosciences has raised $263.12M in total funding; its latest round was Series D in Sep 2021.

Data from Company Prospectus, DOL LCA disclosures, WARN notices and 6figr salary profiles.