Investor profile
Theonie Anastassiadis
Accelerator, Venture capital & Origination Partner at Flagship Pioneering
Theonie Anastassiadis is an Origination Partner at Flagship Pioneering, whose known portfolio counts 9 companies.
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Investment focus
Contacts
Affiliated funds' portfolios
Origination Partner at Flagship Pioneering, whose known portfolio counts 9 companies
- Lila Sciences
- Harbinger Health
- Ampersand Biomedicines
- Etiome
- Expedition Medicines
- Extuitive
- Foghorn Therapeutics
- Serif Biomedicines
- Terrana Biosciences
Investor Profile
The listing covers sectors AI, Climate, Food and Healthcare, and focus areas AgriTech, Biotech, Drug Discovery and FoodTech. Startups operating in these areas may find Theonie Anastassiadis relevant.
Flagship Pioneering appears in Late-Stage, Seed and Series A rounds across its known deals.
What the affiliated firm has backed is the closest available signal on whether Theonie Anastassiadis is worth approaching.
Colleagues at Flagship Pioneering
Showing 20 of 45
Margo Georgiadis
CEO/Partner
San Francisco, United States
Hok Hei Tam
Science Partner
Cambridge, United States
Avak Kahvejian
General Partner
Cambridge, United States
Ignacio Martinez
General Partner
Boston, United States
Ajit Singh
CEOPartner
Palo Alto, United States
Jason Park
Partner
Cambridge, United States
Geoffrey von Maltzahn
General Partner
Cambridge, United States
Bernard Cooney
Senior Partner
Cambridge, United States
Jacob Rubens
Origination Partner
Cambridge, United States
Stephen Berenson
Advisor Partner
United States
Torben Straight Nissen
Executive Partner
Boston, United States
Guillaume Pfefer
CEO Partner Senda Biosciences
Boston, United States
Marie Yurkovich
Biotech Company Creation
New York City, United States
Sophie de Boer
Senior Principal
Cambridge, United States
Alex Goldsmith
Vice President, Global Scientific Engagement
Cambridge, United States
Nathan Stebbins
Senior Principal
Los Angeles, United States
Ewen Cameron
Operating Partner
Boston, United States
Olivia Arnold
Venture Creation Associate
Boston, United States
Murillo Silva
Senior Associate in Venture Creation
Boston, United States
Young Guang
Investor
Boston, United States
Frequently asked questions
Who is Theonie Anastassiadis?
Theonie Anastassiadis is an accelerator partner and venture capital investor based in Boston, Massachusetts, United States, listed as Origination Partner at Flagship Pioneering. The known portfolio of that firm counts 9 companies. That portfolio belongs to the firm, not to Theonie Anastassiadis personally.
What does Theonie Anastassiadis invest in?
Listed sectors include AI, Climate, Food and Healthcare; listed focus areas include AgriTech, Biotech, Drug Discovery and FoodTech. Those tags come from the portfolios of the firms this profile is attached to, so they read as a record of what has been backed rather than a stated preference for what comes next.
What stage does Theonie Anastassiadis invest at?
Flagship Pioneering appears in Late-Stage, Seed and Series A rounds across its known deals, and Theonie Anastassiadis is listed there as Origination Partner. 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 Theonie Anastassiadis listed at?
Theonie Anastassiadis is listed as Origination Partner at Flagship Pioneering. 45 other people in the database share a firm with Theonie Anastassiadis.
How do I contact Theonie Anastassiadis?
An email address, a phone number and a LinkedIn page are on file for Theonie Anastassiadis. 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 6 September 2026 · How this data is built · Report a correction or request removal