Colossal Biosciences
Colossal Biosciences is a biotechnology company developing genetic engineering technologies for species de-extinction and ecosystem restoration. The company has raised $628M in funding and employs 270 people.
The growth story
Colossal Biosciences grew from 23 to 270 employees between 2021 and 2026, raising $628M along the way, most recently a Series C in February 2026.
About
Colossal Biosciences uses CRISPR and other genetic engineering technologies to restore extinct species, protect endangered ones, and repopulate critical ecosystems. Its work aims to address biodiversity loss and ecological health.
The company has raised $628M in funding, including a Series C round in February 2026. Its workforce of 270 is focused on research, with 61 employees in that function. Colossal draws talent heavily from local institutions, particularly UT Southwestern Medical Center and the University of Texas system.
Founders and leadership
Colossal Biosciences is led by a team focused on genetic engineering and bioscience. The largest function is research, with 61 employees, reflecting the company's scientific focus. Leadership spans biotechnology and venture capital backgrounds.
The Colossal Biosciences org chart
Ben Lamm (Founder and CEO) leads 52 mapped leaders with 8 direct reports. Click +N to expand a team; names link to the person’s public profile.
Departments, and which ones grew
Headcount by function: Research 99 (+19% YoY), Engineering 34 (+113% YoY), Entrepreneurship 32 (+7% YoY), Business Development 16 (+7% YoY), Operations 9 (+80% YoY), Information Technology 9 (+50% YoY).
Talent flow
Colossal recruits heavily from UT Southwestern Medical Center, Hypergiant, and University of Texas institutions. Alumni often move to other biotech firms like Form Bio and Proscia. The median tenure is 2 years, typical for high-growth biotech startups.
Most common previous employers of Colossal Biosciences staff: UT Southwestern Medical Center (20), Hypergiant (10), The University of Texas at Dallas (8), Form Bio (7), The University of Texas at Austin (5), Chaotic Moon Studios (5). Former Colossal Biosciences employees most often moved to Form Bio (5), Proscia (2), Bolder (2), Neion Bio (2), Integrated DNA Technologies (2), Intertwined Biosciences (2).
Alumni worth knowing
The Colossal Biosciences mafia
Colossal alumni have founded 7 companies, including Flylance, Yukon Metals, and Midwest.VC. These ventures span industries from biotech to media consulting, reflecting diverse career paths post-Colossal.
7Anthony Custable, was Principal Product Designer • 𝗩𝗜𝗔 𝗙𝗟𝗬𝗟𝗔𝗡𝗖𝗘 until 2025Jim Coates, was Scientific Advisor until 2025Patrick O'Brien, was Head of Product | Founding Team until 2023Cody Rasmussen-Ivey, was Scientist, Stem Cell Biology until 2025Kristine F., was Social & Community Marketing Manager until 2025Evan A., was Head of Stem Cell Biology / Reprogramming & Principal Scientist until 2025
Justin Quinn, was Species Director, Avian Genomics Group until 2023Hiring now
Web traffic
Traffic mix: 19% direct, 67% search, 4% social, 0% paid.
What this company is made of
Most common skills at Colossal Biosciences: Research Skills (86), Leadership (67), Data Analysis (64), Molecular Biology (62), Cell Culture (62), Communication (62), Project Management (56), Microsoft Office (54).
Where the team actually sits
Colossal Biosciences people are concentrated in Texas, United States (83), United States (15), Dallas-Fort Worth Metroplex (13), California, United States (10).
Search footprint
Colossal Biosciences attracts about 49,630 organic search visits a month, traffic worth roughly $28K a month if bought through ads. It gained 2,968 ranking keywords and lost 1,666 in the last period.
What employees say
- Compensation
- 4.60 / 5
- Career opportunities
- 4.50 / 5
- Senior management
- 4.10 / 5
- Work-life balance
- 4.20 / 5
Frequently asked
Colossal Biosciences has 270 employees as of September 2026.
Colossal Biosciences has raised $628M in total, most recently a Series C round in February 2026.
Colossal Biosciences was founded in 2021 by Ben Lamm, Vincent Cordero, George Church, Andrew Busey, Brian Beard.
Ben Lamm (Founder and CEO) sits at the top of Colossal Biosciences's reporting structure, with 8 direct reports.
The most common previous employers of current Colossal Biosciences staff are UT Southwestern Medical Center (20 people), Hypergiant (10 people), The University of Texas at Dallas (8 people).
Former Colossal Biosciences employees most often move to Form Bio (5), Proscia (2), Bolder (2).
At least 7 companies have a founder who previously worked at Colossal Biosciences, including Flylance, Yukon Metals, Midwest.VC.
Colossal Biosciences attracts about 49,630 organic search visits a month, worth roughly $28K a month in equivalent ad spend.
The most common skills among Colossal Biosciences staff are Research Skills, Leadership, Data Analysis, Molecular Biology, Cell Culture.
Colossal Biosciences staff are concentrated in Texas, United States (83), United States (15), Dallas-Fort Worth Metroplex (13).
Colossal Biosciences has about 99 people in Research, up 19% over the past year, as of September 2026.
Colossal Biosciences has about 34 people in Engineering, up 113% over the past year, as of September 2026.
Computed from 157 current and 106 former Colossal Biosciences profiles, as of September 2026. Source: Crustdata.
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