Allen Day is an angel investor and operator angel based in Singapore with 3 known investments: Nansen, Airstack and YieldNest.
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Investment focus
- Sector
- AIFinTechHealthcareSaaS
Contacts
Allen Day portfolio companies (3)
- Nansen
- Airstack
- YieldNest
Affiliated funds' portfolios
Venture Partner at Primitive Ventures, whose known portfolio counts 12 companies
- SpaceComputer
- CANOPY
- aPriori
- OpenMind
- Opinion Labs
- SharpLink
- Sapien
- TAC
- Fluent Labs
- Henlo
- Perena
- Lite Strategy
Investor Profile
The known portfolio sits in sectors AI, FinTech, Healthcare and SaaS, and focus areas Big Data, Bioinformatics, Biotech and Cloud Infrastructure.
Allen Day appears in Pre-Seed, Seed and Series A rounds across the known deals.
The portfolio and focus above give founders context on whether Allen Day matches their raise.
Colleagues at Primitive Ventures
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Frequently asked questions
Who is Allen Day?
Allen Day is an angel investor and operator angel based in Singapore with 3 known investments on file, among them Nansen, Airstack and YieldNest. The sections above list the sectors, stages and firms attached to that record.
What does Allen Day invest in?
Listed sectors include AI, FinTech, Healthcare and SaaS; listed focus areas include Big Data, Bioinformatics, Biotech and Cloud Infrastructure. Those tags come from the companies attached to this profile, so they read as a record of what has been backed rather than a stated preference for what comes next.
What stage does Allen Day invest at?
The known deals of Allen Day include Pre-Seed, Seed and Series A rounds. Stage is the strongest single filter when you build a target list: an investor with no record at your stage rarely starts with you.
Which firm is Allen Day listed at?
Allen Day is listed as Venture Partner at Primitive Ventures. One other person in the database shares a firm with Allen Day.
How do I contact Allen Day?
An email address, a phone number and a LinkedIn page are on file for Allen Day. The address stays masked on this page and is readable inside RaiseHunt after you create an account.
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Data: RaiseHunt investor dataset · Snapshot 5 September 2026 · How this data is built · Report a correction or request removal