Callen Ross, Partner at GR Capital Partners LLC is an active investor based in Waltham, Massachusetts. This profile covers what Callen Ross backs, at which stage, and how founders can reach out in 2026.
Callen Ross is an experienced Corporate Associate with a demonstrated history in the biotechnology and energy sectors.
Callen Ross invests in Healthcare & Biotech and Climate & Energy, typically at Early Stage Venture.
- Investor type
- VC
- Stages
- Early Stage Venture
- Invests in
- Healthcare & BiotechClimate & Energy
- Location
- Waltham, Massachusetts
- Typical check
- $500K
How to reach Callen Ross
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Round Funded. "Callen Ross." Round Funded investor database, updated November 3, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/callen-ross
Frequently Asked Questions
Who is Callen Ross?
Callen Ross, Partner at GR Capital Partners LLC is an active investor based in Waltham, Massachusetts. Callen Ross invests in Healthcare & Biotech and Climate & Energy, typically at Early Stage Venture.
What does Callen Ross invest in?
Callen Ross invests in Healthcare & Biotech and Climate & Energy, typically at Early Stage Venture. Match your sector and stage, then reach out with a personalized pitch.
What stage does Callen Ross invest at?
Callen Ross typically invests at Early Stage Venture. Lead with traction that fits the stage when you reach out.
What is Callen Ross's typical check size?
Callen Ross typically writes checks around $500K. Use it as a signal for whether your raise fits their stage.
How do founders reach investors like this?
Round Funded lists active investors with verified, professional contact details for signed-up founders. Filter by sector, stage and location, then send a personalized pitch from your own inbox.
What is Round Funded?
Round Funded is an investor database and outreach platform for startup founders. It lists 60,000+ active investors with verified contacts, filtered to recent investment activity, and lets founders send personalized pitches from their own Gmail, track replies, and share a free Data Room. Round+ starts at $99 per month with a 3-day trial.