Mike Brennan is an angel investor based in Chicago, Illinois, United States. The known portfolio counts 5 companies: Thread, Quicklly, Discovery Life Sciences, EVERSANA and Solvias.
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Investment focus
- Stage
- Pre-Seed
- Focus
- Data AnalyticsDiagnosticsMediaSpecialty Pharma
Contacts
Mike Brennan portfolio companies (5)
- Thread
- Quicklly
- Discovery Life Sciences
- EVERSANA
- Solvias
Affiliated funds' portfolios
Partner at Water Street Healthcare Partners, whose known portfolio counts 10 companies
- Cato Research
- Medical Guardian
- Pillr Health
- Alcor Scientific
- GlobalMed Logistix
- Guardian Medical
- MedSpeed
- Pathnostics
- Renovo Solutions
- Southern Scripts
Investor Profile
Founders in the listed sectors AI, Consumer, FinTech and Healthcare, and focus areas Data Analytics, Diagnostics, Media and Specialty Pharma will recognize the pattern in this portfolio.
Stage-wise, the known deals cluster around Pre-Seed rounds.
Reviewing the investment history helps decide whether there is a realistic fit before reaching out.
Colleagues at Water Street Healthcare Partners
Jim Lang
Executive Advisor
Boston, United States
Timothy Dugan
Managing Partner
Chicago, United States
Nicklaus Daley
Principal
Chicago, United States
Scott Garrett
Investor
Chicago, United States
Max Mishkin
Partner
Chicago, United States
Kevin Swan
Partner Emeritus
Johns Island, United States
Steve Cosler
Operating Partner
Winter Park, United States
Al Heller
Operating Partner
Lake Zurich, United States
Robert Womsley
Managing Partner
Chicago, United States
Christine Shtepani
Vice President
Chicago, United States
Jim Connelly
Partner
Lake Forest, United States
Patrick Teyro
Principal
Chicago, United States
Katie Ossman
Partner
Chicago, United States
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Frequently asked questions
Who is Mike Brennan?
Mike Brennan is an angel investor based in Chicago, Illinois, United States with 5 known investments on file, among them Thread, Quicklly and Discovery Life Sciences. The sections above list the sectors, stages and firms attached to that record.
What does Mike Brennan invest in?
Listed sectors include AI, Consumer, FinTech and Healthcare; listed focus areas include Data Analytics, Diagnostics, Media and Specialty Pharma. 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 Mike Brennan invest at?
The known deals of Mike Brennan include Pre-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.
Which firm is Mike Brennan listed at?
Mike Brennan is listed as Partner at Water Street Healthcare Partners. 13 other people in the database share a firm with Mike Brennan.
How do I contact Mike Brennan?
An email address, a phone number and a LinkedIn page are on file for Mike Brennan. 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