Don Middleberg is an angel investor based in New York City, United States. The known portfolio is one company, OrganizedWisdom.
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Investment focus
- Stage
- Seed
- Sector
- AIHealthcareSaaS
Contacts
Don Middleberg portfolio company (1)
- OrganizedWisdom
Investor Profile
Founders in the listed sectors AI, Healthcare and SaaS, and focus areas Digital Health and Enterprise SaaS will recognize the pattern in this portfolio.
The stage tag on this profile is Seed.
The portfolio and focus above give founders context on whether Don Middleberg matches their raise.
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Frequently asked questions
Who is Don Middleberg?
Don Middleberg is an angel investor based in New York City, United States with one known investment on file, OrganizedWisdom. The sections above list the sectors and stages attached to that record.
What does Don Middleberg invest in?
Listed sectors include AI, Healthcare and SaaS; listed focus areas include Digital Health and Enterprise SaaS. 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 Don Middleberg invest at?
The database lists Don Middleberg for Seed 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.
How do I contact Don Middleberg?
An email address and a LinkedIn page are on file for Don Middleberg. The address stays masked on this page and is readable inside RaiseHunt after you create an account. The database holds no phone number for this profile.
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Data: RaiseHunt investor dataset · Snapshot 6 September 2026 · How this data is built · Report a correction or request removal