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Markus Sieger: Profile, Experience & Investments | Startup Intros

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§ Investor Profile

Markus Sieger

Updated:Apr 2, 2026

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Quick Facts

Role: Founding Partner and Chair Health Leaders
Company: Reaction
Status: Active
Type: Investor

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Recent News & Mentions

Mar 1, 2015FundingReaction - Series A Jun 1, 2014Funding

Reaction - Seed

Feb 1, 2014FundingReaction - Seed

Experience

Founding Partner and Chair Health LeadersCurrent

Present - Present

Frequently Asked Questions

Who is Markus Sieger?

Markus Sieger is Founding Partner and Chair Health Leaders at Reaction.