Sam Altman
Verified: Jun 2026 (SMTP Validated)👑 Lead InvestorFlexible Check Size
Background & Investment Thesis
Focus Industries
Notable Portfolio & Backed Deals
Active investor in ai, saas, developer-tools, energy, biotech. Highly responsive to concise pitches with clear traction metrics.
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Key Deal Terms & Quick Facts
Audited venture due diligence summary for Sam Altman
$250k – $10M
Direct angel check per syndicate / roundVerified (Protected — Unlock)
Direct mailbox protected against spamFrequently Asked Questions about Sam Altman
What is Sam Altman's typical angel check size?▼
Sam Altman's investment check size typically ranges around $250k – $10M, participating in early-stage financing rounds alongside leading venture capital funds and angel syndicates.
What stages and sectors does Sam Altman invest in?▼
Sam Altman primarily backs early-stage startups across pre-seed, seed, series-a stages, focusing on ai, saas, developer-tools, energy, biotech.
What companies are in Sam Altman's angel portfolio?▼
Sam Altman has backed notable companies including Stripe, Reddit, Asana, Helion, Retro Biosciences.
How can startup founders contact or pitch Sam Altman?▼
Founders can access verified direct email contact channels, AI-assisted pitch drafting, and syndicate warm intro paths for Sam Altman through OpenAngels.