Jacob Rubens
Origination Partner at Flagship Pioneering
Cambridge, Massachusetts
Jacob Rubens, Origination Partner at Flagship Pioneering is an active investor based in Cambridge, Massachusetts. This profile covers what Jacob Rubens backs, at which stage, and how founders can reach out in 2026.
- Investor type
- VCInvestor
- Stages
- Early Stage VentureSeries A
- Invests in
- Healthcare & BiotechBiotech & PharmaFoodTech & Agriculture
- Location
- Cambridge, Massachusetts
- Typical check
- $750K
- Past investments
- 55
Notable investments
Denali Therapeutics
Syros Pharmaceuticals
Incredible FoodsQuotient TherapeuticsInzen Therapeutics
Ohana Biosciences
T2 BiosystemsTangent Medical Technologies
Kaleido BioSciences
Permeon Biologics
KovioHow to reach Jacob Rubens
Angels and operators like Jacob Rubens reply to specific, personalized notes that show real traction, not mass blasts. Build a verified list, write a note that fits their thesis, and track replies, all on Round Funded Accelerator.
Connect with Jacob Rubens
Frequently Asked Questions
What does Jacob Rubens invest in?
Jacob Rubens invests in Healthcare & Biotech, Biotech & Pharma and FoodTech & Agriculture, typically at Early Stage Venture and Series A. Match your sector and stage, then reach out with a personalized pitch.
What stage does Jacob Rubens invest at?
Jacob Rubens typically invests at Early Stage Venture and Series A. Lead with traction that fits the stage when you reach out.
What is Jacob Rubens's typical check size?
Jacob Rubens typically writes checks around $750K. Use it as a signal for whether your raise fits their stage.
How do I contact Jacob Rubens?
Unlock Jacob Rubens's verified email on Round Funded Accelerator and send a personalized pitch. We surface only deliverable contacts so your outreach lands.