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Michael Callahan

Angel investor and technology executive.

Active Angel 🇺🇸 United States · United States
Portfolio Active
2
Latest Lupa
Deal flow
$23M
2 rounds
Unicorns
0
≥ $1B valuation
Founded
—
Latest
Oct 2025
Lupa

About Michael Callahan

Angel investor and technology executive.

Investment activity

2023–2025
$3M
$20M
1
'23
1
'25

Sector focus

🧠 Foundation Models 1
🏥 AI Healthcare 1
⚡ AI Productivity 1
🤖 AI Agents 1

Geographic focus

US 1
GB 1

Portfolio

2

Lupa

AI-native operating system for veterinary clinics.

Patronus AI

A frontier lab training the first Digital World Models to simulate and predict agent actions in digital workflows.

Co-investors

8

Suja Chandrasekaran

1 shared

Prasanna Gopalakrishnan

1 shared

Factorial Capital

1 shared

Lightspeed Venture Partners

1 shared

Amjad Masad

1 shared

firstminute capital

1 shared

Singular

1 shared

Gokul Rajaram

1 shared

Recent rounds

2
Oct 2, 2025 Series A $20M Lupa
Sep 14, 2023 Seed $3M Patronus AI