Organization · Venture Capital
Kastor Capital, LLC
Kastor Capital, LLC is an early-stage venture capital fund based in Boston, Massachusetts, specializing in biotechnology investments. The firm focuses on bridging gaps in drug discovery and development to facilitate the transition of therapies from laboratory to clinical settings.
Overview
What Kastor Capital, LLC does
What Kastor Capital, LLC is
Kastor Capital, LLC is an early-stage venture capital fund based in Boston, Massachusetts, specializing in biotechnology investments. The firm focuses on bridging gaps in drug discovery and development to facilitate the transition of therapies from laboratory to clinical settings.
How it participates in the startup ecosystem
The current public profile supports funder capabilities. Each capability below is shown separately so organization identity and role-specific information do not get conflated.
Operational profile
Organization status and context
Organization status describes the entity itself. Funding and program availability appear within the relevant capability profile.
- Operational status
- Active
- Organization type
- Venture Capital
- Structured capabilities
- Funder
- Last reviewed
- April 22, 2026
Official channels
Find Kastor Capital, LLC elsewhere
Open the official website or a supported primary organization account.
Capability profile
Kastor Capital, LLC as a funder
Investment thesis
Kastor Capital, LLC is an early-stage venture capital fund focused on biotechnology, aiming to bridge gaps in drug discovery and development.
Focus narrative
Kastor Capital invests in life science innovation and technology, specifically within the biotechnology sector. The organization provides strategic partnerships and connects portfolio companies with pharmaceutical companies, contract research organizations (CROs), and manufacturing partners. Additionally, Kastor Capital offers scientific and financial advice to assist founders in navigating the complexities of drug development.
Value beyond capital
Kastor Capital adds value to its portfolio companies through an active scientific advisory network of drug-discovery and development experts who provide mentorship. The organization emphasizes hands-on, network-driven support, connecting startups with essential partners in the pharmaceutical and manufacturing sectors.
Focus and fit
- Stages
- Pre-seed · Seed · Seed+ · Series A · Series A+
- Regions
- United States
Availability
- Currently deploying
- Not published
Portfolio and track record
- Recorded portfolio count
- 3
Portfolio context
Kastor Capital's notable portfolio companies include Absenti Labs, Vertical Semiconductor, and Vincere Biosciences. The portfolio reflects a focus on biotechnology and life sciences, although the inclusion of Vertical Semiconductor may warrant further verification.
Common questions
What to know about Kastor Capital, LLC
Upseed classifies Kastor Capital, LLC under the Venture Capital organization type. Its current public profile includes funder capabilities.
Source and update disclosure
Know what this page is based on
Source basis
Public organization and program material, official websites, and structured Upseed records.
Last reviewed
April 22, 2026
Known limits
Capability profiles appear only when a structured public profile also contains decision-useful role evidence. Terms and availability can change.
Upseed is an independent guide. It is not affiliated with or endorsed by the organization described on this page.