Pathos
Pathos is a clinical-stage biotech company using AI and multimodal patient data to develop precision oncology drugs. It has raised $447M in funding and employs 100 people.
The growth story
Pathos grew from 31 to 100 employees between 2022 and 2026, raising $447M along the way, most recently a Series D in May 2025.
About
Pathos develops cancer treatments by combining AI-driven hypotheses with biological validation and biomarker-focused clinical trials. Its approach uses a multimodal foundation model in oncology to match therapies to patients more effectively.
The company has raised $447M, including a Series D round in May 2025, and employs 100 people. Its rapid growth reflects the increasing focus on AI-driven drug development in precision oncology.
Founders and leadership
Pathos is led by a team focused on integrating AI with oncology research. Its largest function is Research, with 11 employees dedicated to advancing its drug development pipeline.
The Pathos org chart
Iker Huerga (Chief Executive Officer) leads 25 mapped leaders with 5 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 20 (-23% YoY), Business Development 16 (+23% YoY), Engineering 10 (-33% YoY), Arts and Design 6 (0% YoY), Healthcare Services 5 (+150% YoY), Administrative 5 (+67% YoY).
Talent flow
Pathos recruits heavily from Icahn School of Medicine at Mount Sinai, Memorial Sloan Kettering Cancer Center, and Sema4. Alumni often move to startups like Play Health and Synthesize Bio, or venture firms like Builders VC.
Most common previous employers of Pathos staff: Icahn School of Medicine at Mount Sinai (6), Memorial Sloan Kettering Cancer Center (4), Sema4 (4), Bristol Myers Squibb (4), GeneDx (4), PPD (3). Former Pathos employees most often moved to Play Health (3), Synthesize Bio (2), Natera (1), Strand AI (YC W26) (1), Builders VC (1), Kymera Therapeutics (1).
Alumni worth knowing
The Pathos mafia
Pathos alumni have founded 5 companies, including Play Health (8 staff), Ember (8 staff), and Strand AI (3 staff). These startups reflect the company's influence in AI-driven biotech innovation.
6Andrea Mazzocchi, PhD, was Vice President, Partnerships until 2024Ian Miller, was Director of Automation & Software Engineering until 2025Jason Binder, was Head of Patient Experience until 2025Yue Dai, was Software Engineer until 2025David Woods, was Principal Computational Biologist until 2023Zack Malkin, was SVP Finance and Corporate Development until 2025Hiring now
Web traffic
Traffic mix: 0% direct, 0% search, 0% social, 0% paid.
What this company is made of
Most common skills at Pathos: Research Skills (20), Data Analysis (17), Python (Programming Language) (15), Leadership (15), Clinical Research (14), Clinical Trials (13), Life Sciences (13), Microsoft Office (13).
Where the team actually sits
Pathos people are concentrated in New York, United States (17), New York City Metropolitan Area (4), United States (4), Utah, United States (3).
Search footprint
Pathos attracts about 16,200 organic search visits a month, traffic worth roughly $0K a month if bought through ads. It gained 36 ranking keywords and lost 18 in the last period.
Frequently asked
Pathos has 100 employees as of September 2026.
Pathos has raised $447M in total, most recently a Series D round in May 2025.
Pathos was founded in 2022 by Ryan Fukushima.
Iker Huerga (Chief Executive Officer) sits at the top of Pathos's reporting structure, with 5 direct reports.
The most common previous employers of current Pathos staff are Icahn School of Medicine at Mount Sinai (6 people), Memorial Sloan Kettering Cancer Center (4 people), Sema4 (4 people).
Former Pathos employees most often move to Play Health (3), Synthesize Bio (2), Natera (1).
At least 5 companies have a founder who previously worked at Pathos, including Play Health, Ember, Strand AI (YC W26).
Pathos attracts about 16,200 organic search visits a month, worth roughly $0K a month in equivalent ad spend.
The most common skills among Pathos staff are Research Skills, Data Analysis, Python (Programming Language), Leadership, Clinical Research.
Pathos staff are concentrated in New York, United States (17), New York City Metropolitan Area (4), United States (4).
Pathos has about 20 people in Research, down 23% over the past year, as of September 2026.
Pathos has about 16 people in Business Development, up 23% over the past year, as of September 2026.
Computed from 44 current and 42 former Pathos profiles, as of September 2026. Source: Crustdata.
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