Ratio Therapeutics
Ratio Therapeutics is a Boston-based biotech developing targeted cancer radiotherapeutics using its Trillium platform. The 84-person company has raised $160M, including a Series C in 2026.
The growth story
Ratio Therapeutics grew from 15 to 84 employees between 2022 and 2026, raising $160M along the way, most recently a Series C in July 2026.
About
Ratio Therapeutics develops small molecule targeting agents for cancer treatment and imaging, combining pharmacokinetic modulation with chelation technology. Its platform accommodates both imaging and therapeutic radioisotopes, enabling accelerated compound selection through small-scale patient trials.
The company has grown to 84 employees since its 2021 founding and raised $160M, including a Series C in 2026. Investors include Bristol-Myers Squibb, Eli Lilly, and Cornell University.
Founders and leadership
Research is Ratio Therapeutics' largest function, with 19 employees. The company has a median tenure of 2 years, suggesting a relatively young workforce.
The Ratio Therapeutics org chart
John Babich (President & Chief Scientific Officer) leads 38 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 30 (+20% YoY), Information Technology 11 (+10% YoY), Business Development 10 (+25% YoY), Operations 8 (+60% YoY), Program and Project Management 4 (0% YoY), Legal 3 (+50% YoY).
Talent flow
Ratio Therapeutics draws heavily from Invicro, with 13 hires, followed by Pfizer and Weill Cornell Medicine. Alumni have moved to Actinium Pharmaceuticals, Cue Biopharma, and consulting roles.
Most common previous employers of Ratio Therapeutics staff: Invicro (13), Pfizer (5), Weill Cornell Medicine (5), Noria Therapeutics (4), Molecular Insight Pharmaceuticals (4), Harvard Medical School (4). Former Ratio Therapeutics employees most often moved to Actinium Pharmaceuticals (1), ZLN Preclinical & Translational Consulting - Founder (1), HR Pivot Works (1), Cue Biopharma (1), University of Virginia Center for Teaching Excellence (1), Home (1).
Web traffic
Traffic mix: 0% direct, 0% search, 0% social, 0% paid.
What this company is made of
Most common skills at Ratio Therapeutics: Microsoft Office (25), Biotechnology (22), Drug Discovery (21), Life Sciences (20), Research Skills (19), High-Performance Liquid Chromatography (HPLC) (19), Data Analysis (18), Cell Culture (18).
Where the team actually sits
Ratio Therapeutics people are concentrated in Massachusetts, United States (44), United States (5), Greater Boston (4), New York, United States (3).
Search footprint
Ratio Therapeutics attracts about 62 organic search visits a month, traffic worth roughly $0K a month if bought through ads. It gained 16 ranking keywords and lost 13 in the last period.
What employees say
- Compensation
- 4.00 / 5
- Career opportunities
- 5.00 / 5
- Senior management
- 5.00 / 5
- Work-life balance
- 4.00 / 5
Frequently asked
Ratio Therapeutics has 84 employees as of September 2026.
Ratio Therapeutics has raised $160M in total, most recently a Series C round in July 2026.
John Babich (President & Chief Scientific Officer) sits at the top of Ratio Therapeutics's reporting structure, with 8 direct reports.
The most common previous employers of current Ratio Therapeutics staff are Invicro (13 people), Pfizer (5 people), Weill Cornell Medicine (5 people).
Former Ratio Therapeutics employees most often move to Actinium Pharmaceuticals (1), ZLN Preclinical & Translational Consulting - Founder (1), HR Pivot Works (1).
Ratio Therapeutics attracts about 62 organic search visits a month, worth roughly $0K a month in equivalent ad spend.
The most common skills among Ratio Therapeutics staff are Microsoft Office, Biotechnology, Drug Discovery, Life Sciences, Research Skills.
Ratio Therapeutics staff are concentrated in Massachusetts, United States (44), United States (5), Greater Boston (4).
Ratio Therapeutics has about 30 people in Research, up 20% over the past year, as of September 2026.
Ratio Therapeutics has about 11 people in Information Technology, up 10% over the past year, as of September 2026.
Computed from 69 current and 10 former Ratio Therapeutics profiles, as of September 2026. Source: Crustdata.
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