Treeline
Treeline Biosciences is a clinical-stage biopharma company developing cancer and disease treatments through computational drug discovery. It has raised $1.1 billion in funding and employs 169 people.
The growth story
Treeline grew from 40 to 169 employees between 2021 and 2026, raising $1.1B along the way, most recently a Series A in September 2025.
About
Treeline Biosciences integrates computational tools with in-house R&D to identify and develop treatments for cancer and serious diseases. Its approach combines biology, chemistry, protein science, and clinical development expertise across the U.S. and Europe.
The company, founded in 2021, has rapidly scaled to 169 employees and secured $1.1 billion in funding, including a Series A round in September 2025. Its investor base includes ARCH Venture Partners, Casdin Capital, and Access Industries, among others.
Founders and leadership
Treeline Biosciences is led by a team of experts in biology, chemistry, protein science, computation, and clinical development. Its largest function is Research, which accounts for 50 employees, reflecting its focus on drug discovery and development.
The Treeline org chart
Josh Bilenker (CEO and Co-Founder) leads 60 mapped leaders with 13 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 80 (+7% YoY), Business Development 20 (+5% YoY), Engineering 12 (+20% YoY), Operations 9 (+13% YoY), Information Technology 7 (0% YoY), Legal 5 (+25% YoY).
Talent flow
Treeline Biosciences recruits heavily from major pharma companies, with Novartis, Pfizer, and Bristol Myers Squibb being the top sources of talent. Employees often move to roles in biotech firms like Nexo Therapeutics and Protego Bio.
Most common previous employers of Treeline staff: Novartis (24), Pfizer (15), Bristol Myers Squibb (13), Scripps Research (9), Celgene (8), GNF (7). Former Treeline employees most often moved to Treeline Biosciences (3), Nexo Therapeutics (2), Protego Bio (2), Novo Nordisk (2), Rhythm Pharmaceuticals (1), Kowa Research Institute (1).
Alumni worth knowing
Hiring now
Web traffic
Traffic mix: 51% direct, 27% search, 14% social, 1% paid.
What this company is made of
Most common skills at Treeline: Drug Discovery (47), Molecular Biology (40), Biochemistry (40), Research Skills (38), High-Performance Liquid Chromatography (HPLC) (36), Cell Culture (33), Medicinal Chemistry (33), Data Analysis (32).
Where the team actually sits
Treeline people are concentrated in Massachusetts, United States (48), California, United States (41), United States (14), Greater Boston (12).
Search footprint
Treeline attracts about 137 organic search visits a month, traffic worth roughly $0K a month if bought through ads. It gained 18 ranking keywords and lost 23 in the last period.
What employees say
- Compensation
- 2.90 / 5
- Career opportunities
- 2.60 / 5
- Senior management
- 2.90 / 5
- Work-life balance
- 2.80 / 5
Frequently asked
Treeline has 169 employees as of September 2026.
Treeline has raised $1.1B in total, most recently a Series A round in September 2025.
Treeline was founded in 2021 by Josh Bilenker, Jeffrey Engelman.
Josh Bilenker (CEO and Co-Founder) sits at the top of Treeline's reporting structure, with 13 direct reports.
The most common previous employers of current Treeline staff are Novartis (24 people), Pfizer (15 people), Bristol Myers Squibb (13 people).
Former Treeline employees most often move to Treeline Biosciences (3), Nexo Therapeutics (2), Protego Bio (2).
Treeline attracts about 137 organic search visits a month, worth roughly $0K a month in equivalent ad spend.
The most common skills among Treeline staff are Drug Discovery, Molecular Biology, Biochemistry, Research Skills, High-Performance Liquid Chromatography (HPLC).
Treeline staff are concentrated in Massachusetts, United States (48), California, United States (41), United States (14).
Treeline has about 80 people in Research, up 7% over the past year, as of September 2026.
Treeline has about 20 people in Business Development, up 5% over the past year, as of September 2026.
Computed from 146 current and 72 former Treeline profiles, as of September 2026. Source: Crustdata.
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